PAM8302AASCR中文资料

User Manual AC Current Probe Model JM830ADESCRIPTIONThe JM830A (Catalog #2110.83) is designed for use in industrial environments. The “squared” jaws permit multiple conductor or bus bar positioning. The current output makes it the perfect tool for measurement with DMMs, recorders, power and harmonic meters. The Model JM830A is compatible with any AC ammeter, multimeter, or other current measuring instruments with an input impedance lower than 5Ω. To achieve the stated accuracy, use the JM830A with a DMM having an accuracy of 0.75%.WARNINGThese safety warnings are provided to ensure the safety of personnel and proper operation of the instrument.• Read the instruction manual completely and follow all the safety information before attempting to use or service this instrument.•Use caution on any circuit: Potentially high voltages and currents may be present and may pose a shock hazard.• Read the Safety Specifications section prior to using the current probe. Never exceed the maximum voltage ratings given.• Safety is the responsibility of the operator.• ALWAYS connect the current probe to the display device before clamping the probe onto the sample being tested.• ALWAYS inspect the instrument, probe, probe cable, and output terminals prior to use. Replace any defective parts immediately.• NEVER use the current probe on electrical conductors rated above 600V in overvoltage Category III (CAT III). Use extreme caution when clamping around bare conductors or bus bars.INTERNATIONAL ELECTRICAL SYMBOLSThis symbol signifies that the current probe is protected by double or reinforced insulation. Use only factory specified replacement parts when servicing the instrument.This symbol signifies CAUTION! and requests that the user refer to the user manual before using the This is a type A current sensor. This symbol signifies that application around and removal from HAZARDOUS LIVE conductors is permitted.DEFINITION OF MEASUREMENT CATEGORIESCat. II: For measurements performed on circuits directly connected to the electrical distribution system. Examples are measurements on household appliances or portable tools.Cat. III: For measurements performed in the building installation at the distribution level such as on hardwired equipment in fixed installation and circuit breakers.Cat. IV: For measurements performed at the primary electrical supply (<1000V) such as on primaryovercurrent protection devices, ripple control units, or meters.RECEIVING YOUR SHIPMENTUpon receiving your shipment, make sure that the contents are consistent with the packing list. Notify your distributor of any missing items. If the equipment appears to be damaged, file a claim immediately with the carrier and notify your distributor at once, giving a detailed description of any damage.ELECTRICAL SPECIFICATIONSCurrent Range:1 to 2400A AC, continuous cycle for the full temperature range(3000A if temperature < 35°C or 95°F)Transformation Ratio: 3000:1Output Signal:0.333mA AC/A AC (1A at 3000A)Accuracy and Phase Shift*:Primary current150A600A3000A Accuracy % 1.5%0.75%0.5% Phase shift 1.5°0.75°0.5°(*Reference conditions: 23°C±3°K, 20 to 85% RH, 48 to 65 Hz, external magnetic field < 40A/m, no DC component, no external current carrying conductor, test sample centered.)Load impedance 5Ω.2Overload: 3600A during 5 mnOpen Circuit Voltage:< 46V by limiting circuitAccuracy: Per IEC 185-26-27Class 0.5 from 48 to 1000 Hz Frequency Range:30 Hz to 5 kHz; current derating above1 kHz for continuous useAmpere Second Product: 90 AALoad Impedance: ≤ 5ΩWorking Voltage: 600V ACCommon Mode Voltage: 600V AC Influence of Adjacent Conductor:0.005A/A ACInfluence of Conductor in Jaw Opening: 1% ± 0.1A of reading MECHANICAL SPECIFICATIONS Operating Temperature:14° to 122°F (-10° to 50°C)Storage Temperature:-13° to 176°F (-25° to 80°C) Influence of Temperature:< 0.1% per 10°KJaw Opening: 3.54" (90mm) Maximum Conductor Size:Cable: 2.52" Ø max. (64mm)Bus bar: 1.97 x 5.31" (50 x 135mm)2.52 x3.94" (64 x 100mm) Envelope Protection:IP 20 (IEC 529)Drop Test:500mm (IEC 68-2-32)Mechanical Shock:100g (IEC 68-2-27)Vibration:10/55/10Hz, 0.15mm (IEC 68-2-6) Polycarbonate Material:Handles: 10% fiberglass chargedpolycarbonate UL 94 V0 Jaws: ABS UL 94 V2Dimensions:4.72 x 12.40 x 1.89" (120 x 315 x 48 mm)Weight:2.65 lbs. (1200 g)Colors:Dark gray handles with red jawsOutput:5 ft. (1.5m) lead with safety 4mm banana plug SAFETY SPECIFICATIONSElectrical Conformity to International Standards: This instrument is compliant with IEC 61010-2-032, 300V category IV and 600V category III.Double or reinforced insulation .Type of current sensor per IEC 61010-2-032:type A .Electromagnetic Compatibility:The device is in conformity with standard IEC61326-1.ORDERING INFORMATIONCurrent Probe JM830A .............................Cat #2110.83 Includes a user manual and a product warranty and registration cardAccessories:Banana plug adapter(to non-recessed plug) ................................Cat #1017.453OPERATIONPlease make sure that you have already read and fully understand the WARNING section on page 1. Making Measurements with the AC Current Probe Model JM830A• Connect the black and red terminals to the Ampere AC range of your DMM or current measuringinstrument. Select the appropriate current range (2A AC). Clamp the probe around the conductor to be tested. If the reading is less than 200mA, select the lower range until you obtain the best resolution.Read the value display on the DMM and multiply it by the probe ratio (3000/1 = 3000). (If reading =0.592A AC, the current flowing through the probe is 0.592A x 3000 = 1776A).• For best accuracy: carefully center the conductor inside the probe jaw, avoid if possible, the proximity of other conductors which may create noise.Tips for Making Precise Measurements• When using a current probe with a meter, it is important to select the range that provides the bestresolution. Failure to do this may result in measurement errors.• Make sure that probe jaw mating surfaces are free of dust and contamination. Contaminants cause air gaps between the jaws, increasing the phase shift between primary and secondary. It is very critical for power measurement.MAINTENANCE• For maintenance use only original replacement parts.• To avoid electrical shock, do not attempt to perform any servicing unless you are qualified to do so.• To avoid electrical shock and/or damage to the instrument, do not get water or other foreign agents into the probe.Cleaning:To ensure optimum performance, it is important to keep the probe jaw mating surfaces clean at all times. Failure to do so may result in error in readings. To clean the probe jaws, use very fine sand paper (fine 600) to avoid scratching the jaw, then gently clean with a soft, oil cloth.REPAIR AND CALIBRATIONYou must contact our Service Center for a Customer Service Authorization number (CSA#). This will ensure that when your instrument arrives, it will be tracked and processed promptly. Please write the CSA# on the outside of the shipping container.Chauvin Arnoux®, Inc. d.b.a. AEMC® Instruments15 Faraday Drive • Dover, NH 03820 USA(800)945-2362(Ext.360)•(603)749-6434(Ext.360)•***************(Or contact your authorized distributor)NOTE: All customers must obtain a CSA# before returning any instrument.TECHNICAL AND SALES ASSISTANCEIf you are experiencing any technical problems, or require any assistance with the proper use or application of this instrument, please contact our technical hotline:(800)945-2362(Ext.351)•(603)749-6434(Ext.351)•******************** LIMITED WARRANTYThe current probe is warranted to the owner for a period of two years from the date of original purchase against defects in manufacture. This limited warranty is given by AEMC® Instruments, not by the distributor from whom it was purchased. This warranty is void if the unit has been tampered with, abused or if the defect is related to service not performed by AEMC® Instruments.Full warranty coverage and product registration is available on our website at:. Please print the online Warranty Coverage Information for your records.499-MAN 100113 v9 08/21。

6Owner's Manual for SRM 6302 / 8302 P/N 050804REV AFender Musical Instruments7975 North Hayden Road, Scottsdale, Arizona 85258 U.S.A.Fender knows the importance of sound reinforcement. From the simple box-top mixer to today's professional touring concert systems, the need to communicate, to make the connection between the performer and the audience is foremost in Fender's mind.Perhaps no other single piece of gear can make or break your band's sound.You see, your sound system is more than just a combination of dials, wires and speakers. It is an integral part of the audio chain and should be treated with special care and attention to detail.At Fender, we know what building quality musical instruments and sound reinforcement equipment is all about. In fact, many of the world's best sounding electric musical instruments and sound reinforcement equipment proudly wear the Fender name.Whether you need a simple box top powered mixer for your Saturday afternoon jam, or a professional full-size concert system, Fender has the sound reinforcement equipment to meet your needs. Likewise, your decision to purchase Fender pro audio gear is one you will appreciate with each performance for years to come.Wishing you years of enjoyment and a heartfelt thank you,Bill SchultzBill SchultzChairmanFender Musical Instruments Corporation150 Watts per Channel at 4ΩAssignable Dual Power Amplifiers9-Band Assignable Graphic Equalizer with 30mm Sliders3-Band Equalizer per Input Channel+48V DC Phantom PowerIndividual Channel Effects Level Control Both 1/4 inch Phone TRS and 3-Pin XLR Female Input ConnectorsPatch Points for Line Level Output and Power Amp Inputs and Outboard Gear Full-bodied Spring Reverb The SRM 6302 / 8302: a dual 150 watt professional powered mixer from your friends at Fender®Pro Audio. We are sure you will find your new SRM 6302 / 8302 to be both a unique and effective sound reinforcement product, providing years of trouble-free service.With ease of setup in mind, the integrated mixer/amplifier design of your SRM 6302 / 8302 makes it a complex and versatile unit, yet simple to operate. Enclosed in a boxtop style cabinet, your SRM 6302 / 8302 features individual channel preamps, an assignable dual power amplifier, +48V DC phantom power, a 9-band graphic equalizer, line and mic level channel inputs, a patch bay and much, much more. With 1/4 inch TRS phone jacks, 3-Pin XLR female input jacks and stereo RCA input jacks, your SRM 6302 / 8302 can accommodate almost any input connection and signal level.Ideal for live music, churches, auditoriums, hotel conference or meeting rooms, your SRM 6302 / 8302 is suitable for a wide variety of sound reinforcement applications. With its assignable dual power amplifier, your SRM 6302 / 8302 can feed your main front of house speakers while simultaneously providing power for stage monitors. Its front panel patch bay makes using outboard effects gear and signal processing equipment a snap. Moreover, the patch bay provides easy access for adding or rerouting power amplifiers. Designed to meet the most demanding needs of audio professionals,your SRM 6302 / 8302 will provide years of reliable, trouble-free service, day in and day out. Please read through this owner’s manual in order to more thoroughly understand the operation of your SRM 6302 / 8302.WARNING:- TO REDUCE THE RISK OF FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.- NO USER SERVICEABLE PARTS INSIDE, REFER SERVICING TO QUALIFIED PERSONNEL ONLY.- ALLOW AT LEAST 3” (7.6 cm) AROUND THE UNIT FOR PROPER VENTILATION.- THIS UNIT MUST BE EARTH GROUNDED.SRM 6302/ 8302 PROFESSIONAL POWEREDMIXERF.TAPE/EFFECTS RETURN TO MONITOR -Adjusts the tape/effects signal level sent to the monitor mix from either the Effects In or Tape In jacks. Rotating the knob clockwise increases the tape/effects signal sent to the monitor mix.G. TAPE/EFFECTS RETURN TO MAIN - Adjusts the tape/effects signal level sent to the main mix from either the Effects In or Tape In jacks. Rotating the knob clockwise increases the tape/effects signal sent to the main mix.H. MAIN - The main output volume control of the SRM 6302 / 8302. Any adjustments to this control will affect the signal level at the Main Out, as well as, PA1 and PA2 depending upon the PA2 Assign switch position and patch bay configuration.well as, PA1 and PA2 depending upon the PA2 Assign switch position and patch bay configuration. L. EFFECTS - Adjusts the signal level present at the Effects Out / Footswitch jack, as well as, the signal driving the reverb. Rotating the knob clockwise increases the amount of tape/effects and reverb drive signal. When the knob is set at 0, there is no effects drive signal.M. REC OUT - Adjusts the tape out signal level of the SRM 6302 / 8302. (The Main Out signal feeds this control.) Rotating the knob clockwise increases the output level. When the knob is set at 0, there is no signal level output.O. TAPE IN - Unbalanced phono (RCA) input jacks designed for use with a tapeplayer, CD player, etc. These jacks sum the stereo left and right input signal to a mono signal useful for playingprerecorded music. Thetape/effects return to main andtape/effects return to monitor control the volume to these buses respectively.P. TAPE OUT - Unbalanced phono (RCA) output jacks designed for use with a tape recorder. They produce a mono signal. The rec out knob controls the tape out signal level.Q. PA 1 OUT / PA 2 OUT - These are speaker level output jacks designed to feed your main or monitor speaker enclosures. Remember, the minimum impedance load is 4 ohms . Connecting a load of less than 4 ohms may result in unsatisfactory performance such as overheating to the point of thermal shutdown. PA 1 Out jacks are intended for the main speakers. The use of the PA 2 Out jacks depends on the position of the PA 2 Assign switch.(See item E on page 5).R.POWER SWITCH -Turns the AC power ON and OFF. When the switch is in the OFF position, the SRM 6302 / 8302 is completely shut down.S. SUPPLY CORD - This is a grounding type supply cord to reduce the possibility of shock hazard. Completely unwind the cord from its cord wrap to prevent blocking air flow to the transformer. Be sure to connect the cord to a grounded receptacle. DO NOT ALTER THE AC PLUG.TAPE INPUT / OUTPUT JACKSPOWERONOFFRREAR PANEL OUT INL RTAPE O P SPARALLEL SPK JACKS150W4Ω MIN TOTALPARALLEL SPK JACKS150W4Ω MIN TOTALPA 2OUT PA 1OUTQParallel or series are the two basic ways which multiple speakers can be connected to a single power amplifier. When speakers are connected in parallel, their combined impedance decreases. For speakers wired in series the opposite is true, their combined impedance increases. Also, when speakers are wired in series, higher impedance speakers in the series draw more power from the amplifier than do speakers in the series with lower impedances. When speakers are wired in parallel, the opposite is true.At Fender®, we recommend connecting multiple speakers in parallel for several reasons. First, if one speaker fails, the others will continue to operate. Second, because in a series connection one speaker affects the output of the other speakers, unpredictable frequency response is a concern. Third, most speaker cabinets are already wired for parallel connections making parallel connections the most common wiring method.When using your SRM 6302 / 8302, be sure that the minimum load connected to each channel is 4 ohms. Below are two charts demonstrating how to calculate both parallel and series impedance.Additionally, power and audio signal cables are the most common sources of sound system failure. Well made and carefully maintained cables are essential to the reliability of the entire sound system. If long speaker cables are required, it is important to ensure the cable is sufficient to transfer all of the available amplifier power to the speakers rather than absorbing the power itself. As a rule of thumb, larger wires are better as they conduct more power to the speakers (larger wire has smaller gauge numbers).Below are two charts listing speaker wire gauges and recommendations for best results.*Example - If the speaker wire lengthrequired is between 25-50 feet (7.60-15.25 meters) and the speakerimpedance is 8Ω, the minimumrecommended speaker wire gauge is 16.100'-UP(30.5 m-UP)50'-100'(15.25-30.5 m)*25'-50'(7.60-15.25 m)10'-25'(3.05-7.60 m)0'-10'(0.00-3.05 m)SPEAKER WIRE GAUGESPEAKER IMPEDANCE [z]SPEAKERWIRELENGTHAWGResistance in Ω per foot(30.5 cm) @ 77º F (25º C)1816141210.00651.00409.00258.00162.001028.000640.831.322.103.325.278.3810121412141614*16181618181818184Ω*8Ω16ΩCross-Section[mm ]2The SRM 6302 / 8302 has a variety of connectors on its input / output panels. Below is a chart listing the various types and their pin outs.Before using the SRM 6302 / 8302,please read and follow the steps listedbelow:1. IMPORTANT Heed all safety warnings when operating the SRM 6302 / 8302.2. Make sure the power switch is in the OFF position and all volume levels are in the 0 position.3. Next, plug the supply cord into a power source with the correct voltage.5. Connect the speaker cables from the SRM 6302 / 8302 PA out jacks to the input jacks of the speaker cabinets.6. Connect the cord(s) from any outboard gear, microphones or other signal source(s) to the appropriate input jack(s) on your SRM 6302 / 8302's.7. First, turn all outboard gear, instruments and other equipment ON, then the SRM 6302 / 8302.8. Increase volume controls and effects level controls to their desired levels, listening for feedback or ringing.9. When shutting down the SRM 6302 / 8302, turn OFF the SRM 6302 / 8302 first then any additional outboard gear, instruments or other equipment. For more detail on setting up your SRM 6302 / 8302, please refer to the diagrams on pages 10 thru 13.Jack MICINPUTS Style Connection Pin OutBalancedInputXLRFemalePin 1 = GNDPin 2 = POSPin 3 = NEGPA 1, PA 2, EFFECTS INPUTS 1/4" TSTip = Input SignalSleeve = GNDLINE INPUTS 1/4"TRSTip = POS SignalRing = NEG SignalSleeve = GNDTAPE IN / OUT DualRCAInner Ring = SignalOuter Shell = GNDFOOTSWITCH1/4" TSTip = SignalSleeve = GND BalancedInputUnbalancedInputSwitchUnbalancedInput /OutputMAIN, MONITOR, EFFECTS OUTPUTSTip = Signal OutputSleeve = GND1/4" TS UnbalancedOutputTip = SignalSleeve = GNDPA 1, PA 2 OUT 1/4" TS SpeakerOutputGround loops are one of the mostcommon causes of hum and buzz insound reinforcement systems and otheraudio products. A ground loop usuallyoccurs if the separate pieces ofequipment are plugged into different AC circuits. Also, if the audio wiring is placed too close to the power cords, hums or buzzes can bleed into the system. Still, improperly maintained power and audio cables are yet another cause of bothersome noise. In order to help minimize stray hums and buzzes, here are some helpful hints.1. Keep all electronics connected to the sound system on the same electrical circuit.2. Keep audio signal cables away from the ACpower cords.3. Use balanced cables when applicable.4. Always plug the SRM 6302 / 8302 into agrounded AC electrical outlet.5. Be sure to use properly maintained cords andcables with the SRM 6302 / 8302.The SRM 6302 / 8302 is covered ingenuine Tolex®for long life and lastinggood looks. To clean the cabinet, use asponge with a light soapy solution.Avoid spilling any liquids on the operatingsurface, heat sink, grille, volume and tone controls,switches and line cord. ALWAYS unplug the SRM6302 / 8302 before cleaning it or approaching it withfluids. Before plugging in the SRM 6302 / 8302 waituntil the unit has completely dried.If the SRM 6302 / 8302 is set up butdoes not function, please check thefollowing items:• Is the SRM 6302 / 8302's power cord properlyplugged into an electrical outlet?• Is there power at the outlet?• (If applicable) does your instrument have power?• Are the volume control knobs on the SRM6302 /8302 turned above the 0 position?• Are the volume control knobs on your instrumentsturned above their minimum position?• Is the mic/instrument properly plugged into theSRM 6302 / 8302?• Is the mic/instrument turned on?• Are your audio cables frayed, cut or damaged?• If using a condenser mic, is the phantom powerturned on?• If using an outboard gear, are the cordsproperly connected?• Is there power to the outboard gear?• Are the levels on your outboard gear above theirminimum positions?If after checking all of the above the SRM 6302 /8302 is still not performing correctly, consult yourauthorized Fender Service Center.DESIGNATION TYPE PR 332 Array PART NUMBER071-6321-000 (120 V)071-6321-030 (240 V) Aust071-6321-040 (230 V) UK071-6321-060 (230 V) EuroPOWER SPECIFICATIONS120V version: 120V AC, 60 Hz, 900W230V version: 230V AC, 50 Hz, 900W240V version: 240V AC, 50 Hz, 900WPRE-AMPLIFIER SECTIONMIC INPUT IMPEDANCE 1.8 kΩLINE INPUT IMPEDANCE18.2 kΩMIC INPUT SENSITIVITY7 mVLINE INPUT SENSITIVITY65 mVCHANNEL TONE CONTROLS Low +/- 15 dB @ 30 HzMid +/- 15 dB @ 750 HzHigh +/- 15 dB @ 15 kHzGRAPHIC EQUALIZER+/- 12 dB @ 63, 125, 250, 500, 1 k, 2 k, 4 k, 8 k and 16 kHzOVERALL AMPLIFIER-3 dB @ 10 Hz to -3 dB @ 50 kHzFREQUENCY RESPONSE(Line In @ 10 mV)PHANTOM POWER+46.5 V DCPOWER AMPLIFIER SECTIONPOWER OUTPUT150W per channel, <0.05% T.H.D. + noise @ 1 kHz into 4 ΩRATED LOAD IMPEDANCE 4 ΩINPUT SENSITIVITY 1.25 V R.M.S.INPUT IMPEDANCE22 kΩDELTACOMP™RANGE20 dBDIMENSIONS Height:12 in 30.5 cmWidth:21 in53.3 cmDepth:11.75 in29.8 cmWeight:35 lbs15.9 kgPRODUCT SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.A PRODUCT OF:FENDER MUSICAL INSTRUMENTS CORP.DESIGNATION TYPE PR 332PART NUMBER071-8321-000 (120 V)071-8321-030 (240 V) Aust 071-8321-040 (230 V) UK 071-8321-060 (230 V) EuroPOWER SPECIFICATIONS120V version: 120V AC, 60 Hz, 900W 230V version: 230V AC, 50 Hz, 900W 240V version: 240V AC, 50 Hz, 900WPRE-AMPLIFIER SECTIONMIC INPUT IMPEDANCE 1.8 k ΩLINE INPUT IMPEDANCE 18.2 k ΩMIC INPUT SENSITIVITY 7 mV LINE INPUT SENSITIVITY65 mVCHANNEL TONE CONTROLS Low +/- 15 dB @ 30 HzMid +/- 15 dB @ 750 Hz High +/- 15 dB @ 15 kHz GRAPHIC EQUALIZER +/- 12 dB @ 63, 125, 250, 500, 1 k, 2 k, 4 k, 8 k and 16 kHz OVERALL AMPLIFIER -3 dB @ 10 Hz to -3 dB @ 50 kHzFREQUENCY RESPONSE (Line In @ 10 mV)PHANTOM POWER+46.5 V DCPOWER AMPLIFIER SECTIONPOWER OUTPUT150W per channel, <0.05% T.H.D. + noise @ 1 kHz into 4 ΩRATED LOAD IMPEDANCE 4 ΩINPUT SENSITIVITY 1.25 V R.M.S. INPUT IMPEDANCE 22 k ΩDELTACOMP ™RANGE20 dB DIMENSIONSHeight:12 in 30.5 cm Width:21 in 53.3 cm Depth:11.75 in 29.8 cm Weight:36 lbs16.3 kgPRODUCT SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.。

电流模式PWM控制器描述SDH8302 是用于开关电源的内置高压MOSFET的电流模式PWM控制器。

SDH8302 内置高压启动电路。

在轻载下会进入打嗝模式，从而有效地降低系统的待机功耗。

具有降频功能，进一步优化轻载条件下的转换效率。

具有抖频功能，能够改善EMI特性。

具有软启动功能，能够减小器件的应力，防止变压器饱和。

有VDD打嗝功能，不仅防止V DD欠压重启，也有效地降低待机功耗。

SDH8302内部还集成了各种异常状态的保护功能，包括：VDD欠压保护，VDD过压保护，前沿消隐，输出短路保护，过流保护，过温保护等。

且保护后，电路会不断自动重启，直到系统正常为止。

主要特点♦高压启动♦轻载打嗝♦降频♦抖频♦软启动♦VDD打嗝♦VDD欠压保护♦VDD过压保护♦前沿消隐♦输出短路保护♦过流保护♦过温保护应用♦离线式开关电源♦非隔离升压降压转换器♦小家电产品规格分类产 品 封 装 形 式 打 印 名 称 环保等级 包装 SDH8302 DIP-8-300-2.54 SDH8302 无卤料管典型输出功率能力产品195~265V 85~265V适配器开放式适配器开放式SDH8302 10W 13W 5W 8W内部框图极限参数参 数 符 号 参 数 范 围 单位 漏栅电压(RGS=1MΩ) V DGR650 V 栅源（地）电压V GS±30 V 漏端电流脉冲注* I DM 2.8 A 漏端连续电流(Tamb=25︒C) I D0.8 A 信号脉冲雪崩能量注** EAS 30 mJ 高压输入V HV,MAX650 V 供电电压V DD,MAX30 V 反馈电流I FB 3 mA 耗散功率P D 6.3 W 环境热阻θja70 ︒C/W 表面热阻θjc20 ︒C/W 工作结温T J+150 ︒C 工作温度范围T amb-20~+85 ︒C 贮存温度范围T STG-55~+150 ︒C *脉冲宽度由最大结温决定；** L=51mH, T J=25 ︒C (起始)。

8300单输入模块，是监视水流指示、压力开关等设备的。

接报警总线8301单输入输出模块，用于现场各种一次动作并有动作信号输出的被动型联动设备如：排烟阀、送风阀、防火阀等。

接报警总线8302切换模块。

专门和8301配接。

实现对现场大电流（直流）启动设备的控制，以及交流220V设备的转换控制，防止由于使用8301型模块直接控制设备造成将交流电源引入报警总线的危险。

8302C切换模块。

此模块是一种非编码转换接口模块，具有一对常开、常闭输出触点，可根据被控设备需要进行选用。

该模块与KZK-100多线制控制卡配合使用。

控制盘通过此切换模块控制被控设备，并实现与控制设备之间断路、短路检测及强、弱电隔离功能。

8303双输入输出模块。

此模块是一种总线制控制接口模块，可用于完成对二步降防火卷帘门、水泵、排烟风机等双动作设备的控制。

主要用于防火卷帘门的位置控制，能控制其从上位到中位，也能控制其从中位到下位，同时也能确认防火卷帘门是处于上、中、下的哪一位。

该模块也可作为两个独立的8301单输入/输出模块使用。

8303双输入/输出模块具有两个编码地址，两个编码地址连续，最大编码为242，可接收来自控制器的二次不同动作的命令，具有二次不同控制输出和确认二个不同输入回答信号的功能。

此模块所需输入信号为常开开关信号，一旦开关信号动作，8303将此开关信号通过联动总线送入控制器，联动控制器产生报警并显示出动作设备的地址号。

当模块本身出现故障时，控制器也将产生报警并将模块编号显示出来。

本模块具有两对常开、常闭触点及两组有源输出，输入、输出具有检线功能。

8304电话模块。

8304消防电话专用模块主要用于将100A消防电话分机连入总线制消防电话系统。

可直接与总线制电话分机连接，也可通过8312消防电话插座与100B电话分机连接。

当消防电话分机的话筒被提起，该部电话即被消防电话模块自动连入总线制消防电话系统；也可利用火灾报警控制器直接启动模块，实现对固定分机的呼叫。

DESCRIPTIONThe PAM8302 is a 2 Watt, 8-pin, class D audio amplif ier with Enable f unction, it of f ers low THD+N (0.10%), allowing it to produce high-quality sound reproduction.The PAM8302 runs of f of a 5 Volt supply at much higher e f f iciencies than their class AB cousins, making it ideal for many portable applications.The PAM8302 only requires very f ew external components (as few as two tiny capacitors), results in significant cost and board space savings. The PAM8302 is available in a SOP8 package.TYPICAL APPLICATION CIRCUITFEATURESAPPLICATIONS2 Watts @ 10% THD output into a 4 load at 5VSupport speakers or earphone (4 to 32 ). With Enable function.Superior low noise without input. Supply voltage from 2.5V to 5.5V. 85% efficiency above. Short Circuit Protection.Less output capacitor and inductor to save the space and cost. Low THD+NLow quiescent current < 10 mANotebook Computers.PDAs/ GPS Navigator/ e-DictionaryPortable DVD Players, Game Machines.Cellular Phones, VoIP Phones, Screen Phones MP3 or PMP Players.Portable Speaker System, Portable Amplifier LCD monitor / TV. Bluetooth Car-KitInputSpeakerEnableTOP MARKING & PIN CONFIGURATIONAbsolute Maximum Ratings:Supply voltage: *6VInput voltage: -0.3V to VDD +0.3VO O Operation Temperature range: 40C to 85C O O Operation junction temperature: -40C to 125C O O Storage Temperature: -65C to 150C O Maximum Junction Temperature: 150C O Soldering temperature: 250C, 10 secretaryRecommended operating Conditions:Supply voltage Range: 2.5V to 5.5VO O Operation Temperature Range: -40C to 85C O O Junction Temperature Range: -40C to 125CThermal Information:Thermal Resistance ( ):JC O SOP8: 90 C/WJA O DIP8 C/W *Note: Without input signal.ELECTRONIC SPECIFICATIONSORDERING INFORMATIONSOP8Pin DescriptionBLOCK DIAGRAMInput SignalSpeakerTEST CIRCUIT FOR GRAPHSPAM8302 Demo BoardNotes:1.The AP AUX-0025 low pass filter is necessary for every class D amplifier measurement done by AP analyzer.2.A 33 H inductor is used in series with load resistor to emulate the small speaker for efficiency measurement.EnableTHD+N vs. Output Power 8 , 1kHz, VDD = 5V(%)1005020105210.50.20.10.050.020.01600u1m2m5m10m20m50m100m200m500m123(W)Ap THD+N vs. Output Power 4 , 1kHz, VDD = 5V(%)1005020105210.50.20.10.050.020.01600u1m2m5m10m20m50m100m200m500m123(W)Ap(%)1005020105210.50.20.10.050.020.0120 50 100 200 500 1k 2k 5k 10k 20k(Hz)1ApTHD+N vs. Frequency8 , 500mW output, VDD = 5V100%80%60%40%20%0%0 1 2 3Efficiency VS Output PowerE f f i c i e n c yPowerPower Dissipation vs. Output Power4 , 1kHz, VDD = 5V1.41.21.00.80.60.40.20.00 0.5 1 1.5 2P o w e r D i s s i p a t i o n -WOutput Power -WPower Dissipation vs. Output Power 4 , 1kHz, VDD = 5V Class AB = Blue linePAM8202 = Magenta line+0-10-20-30-40-50-60-70-80-90-100-110-120-130-140-15020 50 100 200 500 1k 2k 5k 10k 20k(dBr)FFT Noise Floor(16k FFT)(Hz)OPERATION INFORMATIONCalculating Output Power of BTL amplifierVsupplyVsatVsat VsupplyOutput power is related to supply voltage and the saturationvoltage (Vsat). The Maximum peak-to-peak output voltage on one side of BTL amplifier output is Vp-p = ( Vsupply - 2 X Vsat )Maximum output power of a BTL amplifier with 1% THD is 2Pout (1%) = 4 X Vrms / RloadMaximum output power of a BTL amplifier with 10% THD is Pout (10%) = Pout (1%) X 1.25Output Power vs. Vp-p5.04.03.02.01.00.0BTL Output PowerO u t p u t P o w e r @T H D 10%Vdd - Vsat (V)Setting Amplifier voltage gainIt is very important to know the maximum output level (0dB) of the signal source connected to a power amplifier in order to prevent hard clipping during operation.Gain (max) = Vsupply/ Vin (p-p)Insuf f icient voltage gain will cause low output level and maybe not enough to drive speaker properly. On the other hand, the distortion will be very high if the voltage gain is too high in an audio system.There is a 10k input resistor integrated in side IN (input) node, and since the integrated feedback resistor is 100k , so the maximum voltage gain of PAM8302 is limited at 10V/V (100k/10k, one output). With an external input resistor (Rin) placed between signal source & input node, the voltage gain will beGain = 100k/ (10k + Rin) = Vsupply/ Vin (p-p)Actual voltage gain is two times of this calculation because of BTL connection.Decouple capacitorPAM8302 is a high perf ormance, high speed class D amplif ier, and it requires a 1 F, X7R ceramic decouple capacitor (C1) placed very close between VDD & GND pins to ensure the total harmonic distortion plus noise (THD+N) performance is as designed. This is also very important for efficiency and lowering noise floor. Another 100 F to 1000F main decouple capacitor (C2) should be placed close to supply pin for low frequency Ecoupling.Input capacitorInput capacitor (Cin) blocks the DC voltage between signal source & amplifier to ensure the DC balancing will not be broken between two systems. It also form a high-pass-filter (HPF) with input resistors (Rin + 10k), the lower corner frequency (FCL) is determine by equation below.Fig. 1InputSpeakerEnableFCL = 1/ [2 X Cin X (Rin + 10k)]FCL is the lower corner on frequency response curve.Cin is very important consider to the lower f requency perf ormance. The Cin should not be too large with small speakers as the load, because such small speakers usually can not response with lower frequency, delivering too much low f requency energy into a small speaker which usually got resonant f requency (Fs) around 150Hz is meaningless and dangerous. This will easily over drive the small speakers. The movement of speaker cone will be too much under such condition and this also creates unnecessary distortion on mid-to high f requency range because the speaker is now operating in non-linear area. Speakers can only generate heat but not low frequency sound when it is over driven, the will cause speaker or amplifier failure in some cases.Cin should have 10% tolerance or less because the tolerance can cause the input impedance mismatch at FCL and below.Output filterThe L and C on each output node of PAM8302 form the low-pass-filter (LPF), the higher corner frequency (FCH) is determine by equation below.FCH = 1/ [2 X sqr (L X C)]FCH is the higher corner on frequency response curve.Important NoticeThe L-C f ilters (-12dB/Oct) gives twice much attenuation and lower impedance (means lower insertion loss) compare to those R-C f ilters (-6dB), but remember, the FCH above is also the resonant f requency of this LC network. The quality factor (Q) of this resonant network can be very high, depended on the Q of L and C. The high resonant Q which is usually caused by open-load can generate a very high voltage on speaker terminal, and the impedance of the L-C network can be very low, thus induces large amount of current flows from output stage of PAM8302. This always causes part failure. So Do Not test open-load on any class D amplifier with output filters.LC filter calculator with output load impedance and cut-off frequencyf = , X = 2 fL , X =L C 12 LC12 fCOUTLINE DIMENSIONSOP81.27 TYP.0.19 - 0.250 ~ 80.40 - 0.90Note: Package outline exclusive of mold flash and metal burr.。

一、 芯片介绍与注意事项基本介绍ME8302是一种高性能的AC / DC 电源控制器，主要应用于电池充电器、适配器、辅助电源。

该芯片采用脉冲频率调制(PFM)方式，高精度定电压/恒电流(CV / CC)的原边反馈， ME8302的可以实现高平均效率, 可提供线损补偿；同时在空载产品设计应用指导书 Item No.: 产品编号： ME8302 Product: 产品名称： 10W 电源管理控制IC Date ： 日期： 2013/12/27264VAC 输入条件下，输入功耗可做到小于0.03W 以下。

1、芯片的主要特点：●原边控制，无需光耦和副边控制电路；●CC 和CV曲线接近矩形，电压精度在3%内；●工作在非连续模式的反激拓扑结构中；●工作在PFM，可大大的将低EMI；●有短路保护、OCP、OTP、OVP等自恢复功能。

●芯片内置软启动电路，内置功率管；●带可调线损补偿引脚分配：二、各脚的功能以及调试中注意事项：1.CS原边电流采样端：CS端是原边电流采样端，峰值电流预检测阈值是620mV,在这之后会有一个前沿消隐LEB，当功率管打开时，过冲电流会产生在采样电阻上。

为了避免开关误操作，人为产生一个500ns 的空白期，关闭内部电流采样比较器，使得功率管不会被误操作而关闭。

CS脚的峰值电流检测阈值为620mV。

这个脚不需要外接电容，采样电阻推荐在10K左右。

2.VCC供电脚：ME8302 的启动电流低至0.6uA，可有效地减少系统启动电路的损耗，减小待机功耗。

启动阈值电压17V 关断阈值电压6V。

建议在调试计算中VCC 辅助绕组电压一般设置在20.5V内， VCC电解推荐为2.2uF或更大。

3.GND：芯片的电源接地脚，画PCB时注意与功率地分开布线。

4.CPC脚：线损补偿脚，外接电容对地，推荐使用0.47uF。

5.CPR脚：线损补偿脚,外接电阻对FB脚，补偿推荐使用与VFB上偏分压电阻大小一致,R18 R9，R18越大，线损补偿电压越小，反之越大。

DESCRIPTIONThe PAM8302 is a 2 Watt, 8-pin, class D audio amplif ier with Enable f unction, it of f ers low THD+N (0.10%), allowing it to produce high-quality sound reproduction.The PAM8302 runs of f of a 5 Volt supply at much higher e f ficiencies than their class AB cousins, making it ideal for many portable applications.The PAM8302 only requires very few external components (as few as two tiny capacitors), results in significant cost and board space savings. The PAM8302 is available in a SOP8 package.TYPICAL APPLICATION CIRCUITFEATURESAPPLICATIONS2 Watts @ 10% THD output into a 4 load at 5VSupport speakers or earphone (4 to 32 ). With Enable function.Superior low noise without input. Supply voltage from 2.5V to 5.5V. 85% efficiency above. Short Circuit Protection.Less output capacitor and inductor to save the space and cost. Low THD+NLow quiescent current < 10 mANotebook Computers.PDAs/ GPS Navigator/ e-DictionaryPortable DVD Players, Game Machines.Cellular Phones, VoIP Phones, Screen Phones MP3 or PMP Players.Portable Speaker System, Portable Amplifier LCD monitor / TV. Bluetooth Car-KitInputSpeakerEnableTOP MARKING & PIN CONFIGURATIONAbsolute Maximum Ratings:Supply voltage: *6VInput voltage: -0.3V to VDD +0.3VO O Operation Temperature range: 40C to 85C O O Operation junction temperature: -40C to 125C O O Storage Temperature: -65C to 150C O Maximum Junction Temperature: 150C O Soldering temperature: 250C, 10 secretaryRecommended operating Conditions:Supply voltage Range: 2.5V to 5.5VO O Operation Temperature Range: -40C to 85C O O Junction Temperature Range: -40C to 125CThermal Information:Thermal Resistance ( ):JC O SOP8: 90 C/WJA O DIP8 C/W *Note: Without input signal.ELECTRONIC SPECIFICATIONSORDERING INFORMATIONSOP8Pin DescriptionBLOCK DIAGRAMInput SignalSpeakerTEST CIRCUIT FOR GRAPHSPAM8302 Demo BoardNotes:1.The AP AUX-0025 low pass filter is necessary for every class D amplifier measurement done by AP analyzer.2.A 33 H inductor is used in series with load resistor to emulate the small speaker for efficiency measurement.EnableTHD+N vs. Output Power 8 , 1kHz, VDD = 5V(%)1005020105210.50.20.10.050.020.01600u1m2m5m10m20m50m100m200m500m123(W)Ap THD+N vs. Output Power 4 , 1kHz, VDD = 5V(%)1005020105210.50.20.10.050.020.01600u1m2m5m10m20m50m100m200m500m123(W)Ap(%)1005020105210.50.20.10.050.020.0120 50 100 200 500 1k 2k 5k 10k 20k(Hz)1ApTHD+N vs. Frequency8 , 500mW output, VDD = 5V100%80%60%40%20%0%0 1 2 3Efficiency VS Output PowerE f f i c i e n c yPowerPower Dissipation vs. Output Power4 , 1kHz, VDD = 5V1.41.21.00.80.60.40.20.00 0.5 1 1.5 2P o w e r D i s s i p a t i o n -WOutput Power -WPower Dissipation vs. Output Power 4 , 1kHz, VDD = 5V Class AB = Blue linePAM8202 = Magenta line+0-10-20-30-40-50-60-70-80-90-100-110-120-130-140-15020 50 100 200 500 1k 2k 5k 10k 20k(dBr)FFT Noise Floor(16k FFT)(Hz)OPERATION INFORMATIONCalculating Output Power of BTL amplifierVsupplyVsatVsat VsupplyOutput power is related to supply voltage and the saturationvoltage (Vsat). The Maximum peak-to-peak output voltage on one side of BTL amplifier output is Vp-p = ( Vsupply - 2 X Vsat )Maximum output power of a BTL amplifier with 1% THD is 2Pout (1%) = 4 X Vrms / RloadMaximum output power of a BTL amplifier with 10% THD is Pout (10%) = Pout (1%) X 1.25Output Power vs. Vp-p5.04.03.02.01.00.0BTL Output PowerO u t p u t P o w e r @T H D 10%Vdd - Vsat (V)Setting Amplifier voltage gainIt is very important to know the maximum output level (0dB) of the signal source connected to a power amplifier in order to prevent hard clipping during operation.Gain (max) = Vsupply/ Vin (p-p)Insuf f icient voltage gain will cause low output level and maybe not enough to drive speaker properly. On the other hand, the distortion will be very high if the voltage gain is too high in an audio system.There is a 10k input resistor integrated in side IN (input) node, and since the integrated feedback resistor is 100k , so the maximum voltage gain of PAM8302 is limited at 10V/V (100k/10k, one output). With an external input resistor (Rin) placed between signal source & input node, the voltage gain will beGain = 100k/ (10k + Rin) = Vsupply/ Vin (p-p)Actual voltage gain is two times of this calculation because of BTL connection.Decouple capacitorPAM8302 is a high perf ormance, high speed class D amplif ier, and it requires a 1 F, X7R ceramic decouple capacitor (C1) placed very close between VDD & GND pins to ensure the total harmonic distortion plus noise (THD+N) performance is as designed. This is also very important for efficiency and lowering noise floor. Another 100 F to 1000F main decouple capacitor (C2) should be placed close to supply pin for low frequency Ecoupling.Input capacitorInput capacitor (Cin) blocks the DC voltage between signal source & amplifier to ensure the DC balancing will not be broken between two systems. It also form a high-pass-filter (HPF) with input resistors (Rin + 10k), the lower corner frequency (FCL) is determine by equation below.Fig. 1InputSpeakerEnableFCL = 1/ [2 X Cin X (Rin + 10k)]FCL is the lower corner on frequency response curve.Cin is very important consider to the lower f requency perf ormance. The Cin should not be too large with small speakers as the load, because such small speakers usually can not response with lower frequency, delivering too much low f requency energy into a small speaker which usually got resonant f requency (Fs) around 150Hz is meaningless and dangerous. This will easily over drive the small speakers. The movement of speaker cone will be too much under such condition and this also creates unnecessary distortion on mid-to high f requency range because the speaker is now operating in non-linear area. Speakers can only generate heat but not low frequency sound when it is over driven, the will cause speaker or amplifier failure in some cases.Cin should have 10% tolerance or less because the tolerance can cause the input impedance mismatch at FCL and below.Output filterThe L and C on each output node of PAM8302 form the low-pass-filter (LPF), the higher corner frequency (FCH) is determine by equation below.FCH = 1/ [2 X sqr (L X C)]FCH is the higher corner on frequency response curve.Important NoticeThe L-C f ilters (-12dB/Oct) gives twice much attenuation and lower impedance (means lower insertion loss) compare to those R-C f ilters (-6dB), but remember, the FCH above is also the resonant f requency of this LC network. The quality factor (Q) of this resonant network can be very high, depended on the Q of L and C. The high resonant Q which is usually caused by open-load can generate a very high voltage on speaker terminal, and the impedance of the L-C network can be very low, thus induces large amount of current flows from output stage of PAM8302. This always causes part failure. So Do Not test open-load on any class D amplifier with output filters.LC filter calculator with output load impedance and cut-off frequencyf = , X = 2 fL , X =L C 12 LC12 fCOUTLINE DIMENSIONSOP81.27 TYP.0.19 - 0.250 ~ 80.40 - 0.90Note: Package outline exclusive of mold flash and metal burr.。

S h e n z h e n B a l w a y E l e c t r o n i c T e c h n o l o g y C o.,L t d.BY8302-24QS语音芯片使用说明1、概述BY8302-24QS是深圳市百为电子科技有限公司自主研发的一款新型外挂FLASH高品质MP3主控芯片，支持MP3、WAV格式双解码。

该芯片无需上位机软件，可以通过数据线连接电脑直接读盘。

支持6路一对一控制播放，支持单片机5个IO口组合播放29段，支持25500段串口通讯控制，支持音频插播，有8种触发方式可选。

2、产品特性●支持MP3、WAV高品质音频格式，声音优美。

●24位DAC输出，动态范围支持90dB，信噪比支持85dB。

●支持USB接电脑直接读盘，无需安装上位机软件。

支持XP/WIN7/WIN8/win10/IOS系统。

●支持6段语音一对一触发播放，IO口硬件选择8种触发方式，应用更广泛。

●支持5路IO口单片机0和1组合播放29段语音。

●支持UART异步串口控制：支持播放、暂停、上下曲、音量加减、选曲播放、广告插播等。

●内置音量、曲目、EQ掉电记忆功能，节省24C02。

●支持1-16M字节容量的SPI FLASH。

例如GD25Q16[2M字节]、GD25Q128[16M字节]●音频文件地址：无需排序，以文件命名为准，指定文件播放，最大支持32G U盘，封装：QSOP24。

3、技术规格名称参数MP3、WAV文件格支持采样率8～48K、比特率8～320Kbps音频文件式USB接口 2.0标准（可连接电脑下载语音也可读取U盘内容）UART接口标准串口，3.3V TTL电平,波特率9600输入电压 3.4V-5.5V（推荐值4.2V,5V时芯片供电串个二极管）静态电流10MA工作温度-40℃～70℃湿度10%～90%4、应用领域工业控制领域：工业、控制设备；智能交通设备：收费站、停车场、车内语音提示；广告宣传行业：广告语播报；门禁，考勤：门已开等语音提示；安防行业：人体感应提示，安全语音提示，温馨提示；高级玩具：摇摆机，撞撞车，游戏机等；医疗电子：设备语音提示；教育通讯：教育设备，通讯电子；5、芯片管脚功能说明管脚号管脚名称功能描述备注1DACL音频左声道输出可接功放和耳机2DACR音频右声道输出3VCCIO内部LDO3.3V电压输出可给FLASH供电4LDO5V芯片电源输入 3.6-5V5GND芯片接地芯片数字地6TX UART异步串口数据输出 3.3V的TTL电平7RX UART异步串口数据输入 3.3V的TTL电平8PWR/IOC触发模式控制脚IOC IOC悬空或3.3K电阻接地9BUSY播放时输出高电平，停止为低忙信号10PLAY_LED播放指示灯，停止常亮，播放闪烁输出高电平，LED负极接地11IO6触发输入口6接地触发/单片机IO口控制12SPI_CS/IOA接Flash（触发模式控制脚IOA）IOA悬空或3.3K电阻接地13SPI_DO接Flash14SPI_CLK/IOB接Flash（触发模式控制脚IOB）IOB悬空或3.3K电阻接地15IO5触发输入口5接地触发/单片机IO口控制16IO4触发输入口4接地触发/单片机IO口控制17IO3触发输入口3接地触发/单片机IO口控制18IO2触发输入口2接地触发/单片机IO口控制19IO1触发输入口1接地触发/单片机IO口控制20DM USB信号连接电脑给Flash下载语音，或者读取U盘语音21DP USB信号22RTVCC记忆偏置电压1UF电容接地23VCOM内部偏置电压1UF电容接地24DACGND模拟地芯片模拟地，接大功率功放时和数字地分开单点靠近功放端接地6、IO口按键触发说明该芯片有6个触发IO口，支持一对一触发播放6段音频，支持6路IO口单片机0和1组合播放29段音频。

AD8302说明书1、特点:●措施的收益/损失和相位高达2.7 GHz的双解调对数放大器和鉴相器●在50系统精确的增益测量标度（30毫伏/分贝内输入范围-60 dBm至0 dBm ●典型的非线性<0.5 dB●精确的相位测量调节（10毫伏/度）●典型非线性度<1度●测量/控制器/水平比较模式●从2.7 V - 5.5 V电源电压工作●稳定的1.8 V参考电压输出●从DC至30 MHzf的小信号包络带宽2、应用●线性化的RF / IF功率放大器●精确的RF功率控制●远程系统监控和诊断●回波损耗/ VSWR测量●对于交流信号的数比例功能3、产品说明该AD8302是一种用于测量增益/损耗和在庞大的接收，传输和仪表应用程序的相位的完全集成的系统。

它需要很少的外部元件和一个2.7 V-5.5 V的电源供应。

在50Ω系统中，交流耦合输入信号范围可从-60 dBm至0 dBm ，从低频率可高达2.7 GHz。

该输出提供了精确的测量，收益或亏损超过±30 dB范围扩展到30毫伏/分贝，或相位在0°-180°范围扩展到10毫伏/度。

两个子系统具有30 MHz的输出带宽，这可任意地减小通过添加外部滤波器的电容。

AD8302可用于在控制器模式来迫使增益和相位趋近于预定的信号链的设定点。

AD8302包含一个与解调对数放大器紧密匹配的放大器，每一个都具有60 dB的测量范围。

通过取它们的输出之差，来测量两个输入信号之间的幅度比或增益是可能的。

这些信号甚至可以是在不同的频率，允许转换增益或损耗的测量。

AD8302 可被用来确定绝对信号电平，通过施加未知的信号到一个输入信号和一个校准的交流基准信号到另一个信号。

随着输出级反馈连接被禁用，一个比较器可以实现，通过设定值标签MSET和PSET来编程阈值。

信号输入是单端的，允许它们被匹配和直接连接到定向耦合器。

在低频率时他们的投入阻抗名义上是3kΩ。

3W MONO CLASS D AUDIO AMPLIFIERDescriptionThe PAM8304 is a mono filter-less Class-D amplifier with high SNRand differential input that helps eliminate noise. The PAM8304 supports 2.8V to 6V operation make it idea for up to 4 cells alkaline battery applications. The PAM8304 is capable of driving speaker loads as low as 3Ω speaker with a 5V supply maximizing the output power.Features like greater than 90% efficiency and small PCB area make the PAM8304 Class-D amplifier ideal for portable applications. The output uses a filter-less architecture minimizing the number of external components and PCB area whilst providing a high performance, simple and lower cost system.The PAM8304 features short circuit protection, thermal shutdown and under voltage lock-out.The PAM8304 is available in DFN3030-8L and MOP-8L packages.Features∙ Supply Voltage from 2.8V to 6.0 V ∙ 3Ω Driving Capability∙ 3.0W@10% THD Output with a 4Ω Load and 5V Supply ∙ High Efficiency up to 90% @1W with an 8Ω Load ∙ Shutdown Current <1μA ∙ Superior Low Noise without Input ∙ Short Circuit Protection∙ Thermal Shutdown∙ Available in Space Saving DFN3030-8L and MSOP-8L Packages ∙Pb-Free PackagePin AssignmentsMSOP-8L Top ViewDFN3X3-8L Top View12345678P8304XXXYWOUT+PVDD VDD IN- IN+SD GND OUT-12345678P8304XXXYWOUT+PVDD VDD IN- IN+SD GND OUT-Applications∙ MP4/MP3 ∙ GPS ∙ Set-Top-Box ∙Tablets/Digital Photo Frame ∙ Electronic Dictionary ∙ Portable Game MachinesTypical Applications CircuitV IPin DescriptionsPin Name MSOP-8L/DFN3x3-8L Function OUT+ 1 Positive BTL Output PVDD 2 Power Supply VDD 3 Analog Power Supply IN- 4 Negative Differential Input IN+ 5 Positive Differential Input /SD 6 Shutdown Terminal, Active Low GND 7 Ground OUT- 8 Negative BTL Output Exposed Pad —NCFunctional Block DiagramSDIN-PVDD GNDAbsolute Maximum Ratings (@T A = +25°C, unless otherwise specified.)Parameter Rating UnitSupply Voltage (VDD) 6.5 V Input Voltage (IN+, IN-, /SD) -0.3 to V DD +0.3 V Storage Temperature-65 to +150°C Maximum Junction Temperature 150°CRecommended Operating Conditions (@T A = +25°C, unless otherwise specified.)Symbol Parameter Min Max Unit V DD Supply Voltage 2.8 6.0 V T A Operating Ambient Temperature Range-40 +85 °C T JJunction Temperature Range-40+125°CElectrical Characteristics (@TA=25°C, VDD=5V, Gain=18dB, RL=L(33μH)+R+L(33μH), unless otherwise noted.)Symbol Parameter Test ConditionsMin Typ Max Unit VDD Supply Voltage2.8 6.0 V Po Output PowerTHD+N = 10%, f = 1kHz, R = 4ΩVDD = 5.0V3.0W VDD = 3.6V 1.5VDD = 3.2V 1.2 THD+N = 1%, f = 1kHz, R = 4ΩVDD = 5.0V 2.4 WVDD = 3.6V 1.25 VDD = 3.2V 1.0 THD+N = 10%, f = 1kHz,R = 8ΩVDD = 5.0V 1.75 WVDD = 3.6V 0.90 VDD = 3.2V 0.70 THD+N = 1%, f = 1kHz, R = 8ΩVDD = 5.0V 1.40 WVDD = 3.6V 0.72 VDD = 3.2V 0.60 THD+NTotal Harmonic Distortion Plus NoiseVDD = 5.0V, Po = 1W, R = 8Ω f = 1kHz0.17 %VDD = 3.6V, Po = 0.1W, R = 8Ω 0.16 VDD = 3.2V, Po =0.1W, R = 8Ω 0.14 VDD = 5.0V, Po = 0.5W, R = 4Ω f = 1kHz 0.14 %VDD = 3.6V, Po = 0.2W, R = 4Ω 0.16VDD = 3.2V, Po = 0.1W, R = 4Ω0.17 PSRR Power Supply Ripple Rejection VDD = 3.6V, Inputs ac-grounded with C = 1μFf=217Hz -68dB f=1kHz -70f=10kHz-67DynDynamic RangeVDD = 5V,THD = %, R = 8Ω f =1kHz95 dBVn Output NoiseInputs ac-groundedNo A weighting 170μVA-weighting130 η Efficiency RL = 8Ω,THD = 10%f=1kHz93%RL = 4Ω,THD = 10% 86IQ Quiescent Current VDD = 5V No Load 5 mA Isd Shutdown Current VDD = 2.8V to 5V /SD=0V1 μA Rdson Static Drain-to Source On-state Resistor High Side PMOS,I = 500mAVDD=5.0V 325 m ΩLow Side NMOS,I = 500mA VDD=5.0V 200m Ω fsw Switching Frequency VDD = 2.8V to 5V 400 kHzGv Closed-loop Gain VDD = 2.8V to 5V300K/RinV/V Vos Output Offset Voltage Input ac-ground, VDD = 5V 50 mV VIH SD Input High Voltage VDD = 5V 1.4VVILSD Input Low VoltageVDD = 5V1.0Performance Characteristics (@TA=25°C, VDD=5V, Gain=18dB, RL=L(33μH)+R+L(33μH), unless otherwise noted.)THD+N Vs. Output Power (RL=4Ω) THD+N Vs. Output Power (RL=8Ω)THD+N Vs. Frequency PSRR Vs. FrequencyFrequency Response Noise FloorPerformance Characteristics (@TA=25°C, VDD=5V, Gain=18dB, RL=L(33μH)+R+L(33μH), unless otherwise noted.)Efficiency Vs. Output Power (RL=4Ω) Efficiency Vs. Output Power (RL=8Ω)Quiescent Current Vs. Supply Voltage OSC Frequency Vs. Supply VoltageStart-up Response Shutdown ResponseApplication InformationInput Capacitors (Ci )In the typical application an input capacitor Ci is required to allow the amplifier to bias the input signal to the proper DC level for optimum operation. In this case, Ci and the minimum input impedance Ri form a high-pass filter with the corner frequency determined in the follow equation:()C 1f 2RiCi π=It is important to consider the value of Ci as it directly affects the low frequency performance of the circuit. For example, when Ri is 150k Ω and the specification calls for a flat bass response down to 150Hz. The equation is reconfigured as followed to determine the value of Ci:()i c 1Ci 2R f π=When input resistance variation is considered, if Ci is 7nF one would likely choose a value of 10nF. A further consideration for this capacitor is the leakage path from the input source through the input network (Ci, Ri and Rf) to the load. This leakage current creates a DC offset voltage at the input to the amplifier that reduces useful headroom, especially in high gain applications. For this reason, a low-leakage tantalum or ceramic capacitor is the best choice. When polarized capacitors are used the positive side of the capacitor should face the amplifier input in most applications as the DC level is held at VDD/2, which is likely higher than the source DC level. Please note that it is important to confirm the capacitor polarity in the application.Decoupling Capacitor (CS )The PAM8304 is a high-performance CMOS audio amplifier that requires adequate power supply decoupling to ensure the output total harmonic distortion (THD) as low as possible. Power supply decoupling also prevents the oscillations causing by long lead length between the amplifier and the speaker.Optimum decoupling is achieved by using two different types of capacitors that target different types of noise on the power supply leads. Higher frequency transients, spikes or digital hash should be filtered with a good low equivalent-series-resistance (ESR) ceramic capacitor with a value of typically 1μF. This capacitor should be placed as close as possible to the VDD pin of the device. Lower frequency noise signals should be filtered with a large ceramic capacitor of 10μF or greater. It's recommended to place this capacitor near the audio power amplifier.How to Reduce EMIMost applications require a ferrite bead filter for EMI elimination as shown in Figure 1. The ferrite filter reduces EMI around 1MHz and higher. When selecting a ferrite bead it should be chosen with high impedance at high frequencies but low impedance at low frequencies.Figure 1 Ferrite Bead Filter to Reduce EMIApplication Information (cont.)Shutdown OperationIn order to reduce power consumption while not in use the PAM8304 contains amplifier shutdown circuitry. When a logic low or ground is applied to the /SD pin the PAM8304 will enter a standby mode and supply current drawn will be minimized.Under Voltage Lock-out (UVLO)The PAM8304 incorporates circuitry designed to detect low supply voltage. When the supply voltage drops to 2.0V or below, the PAM8304 goesinto a state of shutdown. The device returns to normal operation only when VDD is higher than 2.5V.Short Circuit Protection (SCP)The PAM8304 has short circuit protection circuitry on the outputs to prevent the device from damage when output-to-output shorts or output-to-GND shorts occur. When a short circuit occurs, the device immediately goes into shutdown state. Once the short is removed the device will be reactivated.Over Temperature Protection (OTP)Thermal protection prevents the device from damage. When the internal die temperature exceeds a typical of 150°C the device will enter a shutdown state and the outputs are disabled. This is not a latched fault, once the thermal fault is cleared and the temperature of the die decreased by 40°C the device will restart with no external system interaction.Anti-POP and Anti-Click CircuitryThe PAM8304 contains circuitry to minimize turn-on and turn-off transients or “click and pops”, where turn-on refers to either power supply turn-on or device recover from shutdown mode. When the device is turned on, the amplifiers are internally muted. An internal current source ramps up the internal reference voltage. The device will remain in mute mode until the reference voltage reach half supply voltage. As soon as the reference voltage is stable, the device will begin full operation. For the best power-off pop performance, the amplifier should be set in shutdown mode prior to removing the power supply voltage.Ordering InformationA: 8 Pin Y: DFN3030 R: Tape & RealS: MSOPPart Number Package Standard Package PAM8304AYR DFN3030-8L 3,000Units/Tape&RealPAM8304ASR MSOP-8L 2,500Units/Tape&RealMarking InformationDFN3030 /MOP8Package Outline Dimensions (All dimensions in mm.)Package: DFN3030Unit: MillimeterPackage Outline Dimensions (All dimensions in mm.)Package: MSOPPAM8304Document number: DS36589 Rev. 1 - 211 of 11October 2013© Diodes IncorporatedDiodes IncorporatedIMPORTANT NOTICEDIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. 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