用于智能电表的非隔离式ACDC降压转换器_V2.0

专业集成IC 设计公司公司简介无锡迈尔斯通集成电路有限公司（简称MST）是国内著名上市企业“浙江钱江摩托股份有限公司”与美国归国博士陈俊于2012年共同出资成立的IC设计公司。

公司创始人及团队领袖陈俊博士，曾在TI位于美国Dallas的设计中心工作十余年，具有丰富的IC设计经验，曾获得11项美国专利、4项中国专利、发表了20余篇IEEE论文。

2009年在美国成立奥马微电子，联合十多名美国优秀合约专家，为TI、Diodes等国家一线IC厂商提供合约设计服务，也为MST提供了坚实的技术保障。

用芯创造美好未来企业宗旨：高标准的创新设计造就高品质的产品公司愿景：芯系世界，共荣未来，成为一流的集成电路设计公司团队理念：诚信、高效、创新、超越创新理念：专注研发，持续创新，积极实践合作理念：为每一位客户提供满意的产品和服务产品分类低压差线性稳压芯片（LDO）产品特点：1.压差可低至30mV (I OUT =10mA)；2.静态电流低至1.6µA；3.输出电压范围有1.8V,2.5V,3.3V,3.6V,4.0V,4.2V,5.0V；4.采用典型的SOT23,SOT89封装；5.输入耐压最高可达80V。

应用领域：1.蓝牙音箱、行车记录仪2.玩具的供电系统3.无绳电话设备4.照相机5.基准电压源6.便携式计算机7.智能电表8.安防监控设备产品型号I Q VINV DROP I OUT (MAX)V OUT (FIX)带EN 引脚封装形式MST52LXXBTE 3uA (Vin+Vdrop)V---24V 500mV@100mA 200mA 1.8V±2%2.5V±2%2.8V±2%3.0V±2%3.3V±2%3.6V±2%4.0V±2%4.2V±2%5.0V±2%NOMST52LXXBTS 3uA (Vin+Vdrop)V---24V 500mV@100mA 200mA NO MST52LXXBTG 3uA (Vin+Vdrop)V---24V 500mV@100mA 200mA NO MST53XXBTE 1.6uA (Vin+Vdrop)V---35V 300mV@100mA 300mA1.8V±2%3.0V±2%3.3V±2%3.6V±2%5.0V±2%NO MST53XXBTS 1.6uA (Vin+Vdrop)V---35V 300mV@100mA 300mA NOMST53XXBTG 1.6uA (Vin+Vdrop)V---35V 300mV@100mA 300mA NO MST54XXBTE 2uA (Vin+Vdrop)V---45V 350mV@100mA 350mA 1.8V±2%3.0V±2%3.3V±2%5.0V±2%NO MST54XXBTS 2uA (Vin+Vdrop)V---45V 350mV@100mA 350mA NO MST54XXBTG 2uA (Vin+Vdrop)V---45V 350mV@100mA 350mA YES MST56XXBTE 2uA (Vin+Vdrop)V---60V 700mV@100mA 200mA 3.0V±2%3.3V±2%3.6V±2%5.0V±2%NO MST56XXBTS 2uA (Vin+Vdrop)V---60V 700mV@100mA 200mA NO MST56XXBTG2uA(Vin+Vdrop)V---60V700mV@100mA200mAYES 蓝牙音箱行车记录仪智能水表无绳电话设备同步整流芯片（Synchronous Rectifier Chip）产品型号产品名称I QIOPPowerMOS最大开关频率封装形式BV DSSRDS（ON）MST1691TG 同步整流控制器400uA 4mA 外置MOS 外置MOS 100KHz MST1692KC 同步整流管（替代二极管）400uA 4mA 60V 20mΩ100KHz MST1694KC 100VCCM 同步整流(下端)400uA 4mA 100V 20mΩ100KHz MST1696KC100VCCM 同步整流(上端)400uA4mA100V20mΩ100KHz 产品特点:1.用于反激转换器，兼容DCM 或准谐振模式；2.最大100KHz 开关频率；3.可选集成100V、20mΩMOS 管或单独控制器；4.可显著减少发热，提升系统效率。

用于智能电表的非隔离式AC/DC降压转换器一款不带变压器的宽电压、低成本、非隔离式AC/DC降压转换器——输出持续电流500mA（2.5~12W)【关键词摘要】非隔离无变压器AC/DC电源芯片XD308H BUCK电路220V转5V220V转12V220V转24V380V转5V380V转12V380V转24V【概述】非隔离AC-DC电源芯片降压电路，一般采用BUCK电路拓扑结构，常见于小家电控制板电源以及工业控制电源供电。

其典型电路规格包含5V/500mA、12V/500mA和24V/500mA等，满足六级能效要求。

可通过EFT、雷击、浪涌等可靠性测试，可通过3C、UL、CE等认证。

其特点是：电路简单、BOM成本低（外围元件数目极少：无需变压器、光耦）,电源体积小、无音频噪声、损耗小发热低。

1）220V转5V降压电路：输入12~380Vac，输出5V/500mA如图1所示的电路为一个典型的输出为5V/500mA的非隔离电源。

它通常应用于家用电器的(电饭煲、洗衣机及其它白色家电)。

此电路还适合于其它非隔离供电的应用，比如LED驱动、智能电表、加热器以及辅助电源和工业控制等。

电源系统带有各种保护，包括过热保护（OTP）、VCC欠压闭锁（UVLO）、过载保护（OLP）、短路保护（SCP）等。

电路特点：无噪音,发热低。

220V转5V降压电路输入级由保险电阻RF1、防雷压敏电阻RV1、整流桥堆D1、EMI滤波电容C4和C5以及滤波电感L2组成。

保险电阻RF1为阻燃可熔的绕线电阻，它同时具备多个功能：a)将桥堆D1的浪涌电流限制在安全的范围；b)差模噪声的衰减；c)在其它任何元件出现短路故障时，充当输入保险丝的功能(元件故障时必须安全开路，不应产生任何冒烟、冒火及过热发光现象)。

压敏电阻RV1用于防雷保护，提高系统可靠性。

功率处理级由宽电压高效率电源芯片XD308H、续流二极管D2、输出电感L1及输出电容C3构成。

一款不带变压器的宽电压、低成本、非隔离式AC/DC降压转换器——输出持续电流500mA（12W)【关键词摘要】非隔离无变压器AC/DC电源芯片XD308H BUCK电路220V转5V220V转12V220V转24V380V转5V380V转12V380V转24V【概述】非隔离AC-DC电源芯片降压电路，一般采用BUCK电路拓扑结构，常见于小家电控制板电源以及工业控制电源供电。

其典型电路规格包含5V/500mA、12V/500mA和24V/500mA等，满足六级能效要求。

可通过EFT、雷击、浪涌等可靠性测试，可通过3C、UL、CE等认证。

其特点是：电路简单、BOM成本低（外围元件数目极少：无需变压器、光耦）,电源体积小、无音频噪声、损耗小发热低。

1）220V转5V降压电路：输入12~380Vac，输出5V/500mA如图1所示的电路为一个典型的输出为5V/500mA的非隔离电源。

它通常应用于家用电器的(电饭煲、洗衣机及其它白色家电)。

此电路还适合于其它非隔离供电的应用，比如LED驱动、智能电表、加热器以及辅助电源和工业控制等。

电源系统带有各种保护，包括过热保护（OTP）、VCC欠压闭锁（UVLO）、过载保护（OLP）、短路保护（SCP）等。

电路特点：无噪音,发热低。

220V转5V降压电路输入级由保险电阻RF1、防雷压敏电阻RV1、整流桥堆D1、EMI滤波电容C4和C5以及滤波电感L2组成。

保险电阻RF1为阻燃可熔的绕线电阻，它同时具备多个功能：a)将桥堆D1的浪涌电流限制在安全的范围；b)差模噪声的衰减；c)在其它任何元件出现短路故障时，充当输入保险丝的功能(元件故障时必须安全开路，不应产生任何冒烟、冒火及过热发光现象)。

压敏电阻RV1用于防雷保护，提高系统可靠性。

功率处理级由宽电压高效率电源芯片XD308H、续流二极管D2、输出电感L1及输出电容C3构成。

2）220V转12V降压电路：输入32~380Vac，输出12V/500mA如图2所示的电路为一个典型的输出为12V/500mA的非隔离电源。

XCA204A0K1MR18V Operation 3.0A Synchronous Step-Down DC/DC Converters■FEATURESInput Voltage Range : 4.5V ~ 18V (Absolute Max 20V) Output Voltage Range : 0.8V ~ 0.65×VIN or 7V Max FB Voltage : 0.765V ±3.0% Output Current : 3.0A Oscillation Frequency : 700kHzControl Method PWM/PFM Automatic EfficiencyUp to 92%Internal Power MOSFET High-side : 85mΩ Low-side : 45mΩ Soft-start Time 1.3ms Protection : UVLO Current LimitThermal Shutdown Low ESR Ceramic Capacitor : Ceramic Capacitor Operating Ambient Temperature : -40℃ ~ 85℃ Package: SOT23-6Environmentally Friendly:EU RoHS Compliant■GENERAL DESCRIPTIONThe XCA204A0K1MR is 18V bootstrap synchronous step-down DC/DC converter with built-in Nch-Nch driver FET, the operatingvoltage range is 4.5V to 18.0V, designed to allow the use of ceramic capacitors. 0.765V reference voltage source is incorporated in the IC, and the output voltage can be set to a value from 0.8V to 0.65×VIN or 7.0V (Max) using external resistors (R1, R2). Switching frequency is 700kHz. In PWM/PFM automatic switchover control, IC can change the control method between PWM andPFM based on the output current requirement and as a result IC can achieve high efficiency over the full load range. XCA204A0K1MR has a fixed internal soft-start time which is 1.3ms, with the built-in UVLO function, the driver FET is forced OFF when input voltage goes down to 4.1V or lower. Over current protection and thermal shutdown are embedded and they secure a safety operation. ■APPLICATIONS ● Set Top Box● Portable TV● LCD TV ● AP Router ■TYPICAL APPLICATION CIRCUIT CTR05092-001■TYPICAL PERFORMANCE CHARACTERISTICSOF FON■BLOCK DIAGRAM■PRODUCT CLASSIFICATION●Ordering InformationProduct Name Package Name Order Unit Shipment XCA204A0K1MR SOT23-63,000pcs/ReelTape & Reel●Selection GuideChip EnableOver Voltage ProtectionThermal Shutdown Soft Start UVLO Current Limit YESYESYESYESYESYESGNDXCA204A0K1MRTOP VIEW■PIN CONFIGURATION■PIN ASSIGNMENTPIN NUMBER PIN NAME FUNCTION1 GND Ground. This pin is the voltage reference for the regulated output voltage. For this reason care must be taken in its layout.2 SW Switch Output. Connect this pin to the switching end of the inductor.3 VIN Power Supply Input. Drive 4.5V to 18V voltage to this pin to power on this chip. Connecting a 10μF~22μF ceramic bypass capacitor between VIN and GND to eliminate noise.4 FB Feedback. An external resistor divider from the output to GND, tapped to the FB pinsets the output voltage.5 EN ON/OFF Control Input. Pull EN above 1.8V to turn the device on.6 BS Bootstrap. A 100nF capacitor is connected between SW and BS pins to drive the power switch’s gate above the supply voltage.■FUNCTION CHARTPIN NAME SIGNAL STATUSEN L or OPEN Stand-byH ActiveGND SW VIN■ABSOLUTE MAXIMUM RATINGS(*1)Ta=25℃PARAMETER SYMBOL RATINGS UNITS Input Supply Voltage Pin V IN-0.3 ~ 20 V EN Voltage Pin V EN-0.3 ~ 20 VSW Voltage Pin V SW-0.3 ~ 20 VBoost Voltage Pin V BS V SW - 0.3 ~ V SW + 5.8 VFB Voltage Pin V FB-0.3 ~ 5.6 V Maximum Junction Temperature Tj 150 ℃Thermal resistance(Junction-Air) θJA88 ℃/W Thermal resistance(Junction-Case) θJC45 ℃/W Operating Ambient Temperature Topr -40 ~ 85 ℃Storage Temperature Tstg -65 ~ 150 ℃(*1) Stresses exceed those ratings may damage the device.XCA204A0K1MR ■ELECTRICAL CHARACTERISTICSTa=25℃PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT Input Voltage Range V IN 4.5 - 18.0 V Supply Current (Quiescent) I Q V EN = V IN, No switching - 300 - μA Supply Current (Shutdown) I STBY V EN = 0V - 3 10 μA Feedback Voltage V FB0.742 0.765 0.788 V Feedback Current I FB V FB = 1V -0.1 0 0.1 μA Switch-On High-Side Resistance (*1)R DSH(ON) - 85 - mΩSwitch-On Low-Side Resistance (*1)R DSL(ON)- 45 - mΩSwitch Leakage I SW V EN = 0V, V SW = 0V - - 10 μA Current Limit (*1)I OC DC current, V OUT =1.8V 3.1 4.0 - A Oscillator Frequency f SW V OUT = 5V@1A Load 560 700 880 kHz Soft-start time (*1)t SS V FB = 0V to 0.7V - 1.3 - ms Minimum ON-Time (*1)t ON- 150 - ns Minimum OFF-Time (*1)t OFF- 250 360 ns Under Voltage Lockout Threshold V UVLOR V IN Rising, V OUT = 1V - 4.1 4.4 VUnder Voltage LockoutV UVLOH V OUT = 1V - 250 - mV Threshold HysteresisEN pin resistance to GND R EN0.7 1.2 1.8 MΩEN Up Threshold Voltage V ENH 1.8 - 18.0 V EN Down Threshold Voltage V ENL GND - 0.4 V Thermal Shutdown (*1)T TSD- 150 - °C Test Condition: Unless otherwise stated, V IN=9V, V EN=2V(*1) Design reference value.■TYPICAL APPLICATION CIRCUITOF F ONFigure.1 Typical Application Circuit【Table1 : Recommended Component Selection】V OUT R1 R2 CFB L1 C1 C2 C3+C4(*)C5 C67.0V 81.5kΩ10kΩOptional 4.7μH 22μF/25VCeramic0.1μF/25VCeramic68μFCeramic0.1μFCeramic0.1μFCeramic5.0V 54.9kΩ10kΩOptional 3.3μH 22μF/25VCeramic0.1μF/25VCeramic44~68μFCeramic0.1μFCeramic0.1μFCeramic3.3V 33.2kΩ10kΩOptional 3.3μH 22μF/25VCeramic0.1μF/25VCeramic44~68μFCeramic0.1μFCeramic0.1μFCeramic1.8V 13.6kΩ10kΩOptional2.2μH 22μF/25VCeramic0.1μF/25VCeramic44~68μFCeramic0.1μFCeramic0.1μFCeramic1.0V 3.09kΩ10kΩOptional 1.5μH 22μF/25VCeramic0.1μF/25VCeramic44~68μFCeramic0.1μFCeramic0.1μFCeramic(*) V OUT=0.8V ~ 5.0V : (C3+C4) = 44μF to 68μF (Ceramic)V OUT=5.1V ~ 7.0V : (C3+C4) = 68μF (Ceramic)【Table2 : Parts example for evaluation】Name Number Value Parts number VenderL1 (*1) 1.5μH CLF6045NIT-1R5N TDK2.2μH CLF6045NIT-2R2N TDK3.3μH CLF6045NIT-3R3N TDK4.7μH CLF6045NIT-4R7N TDKC1 1 22μF TMK212BBJ226MG TAIYO YUDEN C2 1 0.1μF TMK105BJ104KP TAIYO YUDENC3, C4 (*2) 22μF LMK212BBJ226MG TAIYO YUDEN 68μF C3216X5R1A686M160AC TDKC5 1 0.1μF UMK105B7104KV TAIYO YUDEN C6 1 0.1μF UMK105B7104KV TAIYO YUDEN (*1) Select according to V OUT setting voltage.(*2) C3+C4=44μF : Two 22μF used in parallelXCA204A0K1MR■Function DescriptionThe main control loop of XCA204A0K1MR are adaptive on-time pulse width modulation (PWM) controller. The control mechanism combines adaptive on-time control with an internal compensation circuit for pseudo-fixed frequency and low external component count configuration with both low ESR and ceramic output capacitors. It is stable even with virtually no ripple at the output.At the beginning of each cycle, the high-side MOSFET is turned on. This MOSFET is turned off after internal one shot timer expires. This one shot duration is set proportional to the converter input voltage, VIN, and inversely proportional to the output voltage, V OUT, to maintain a pseudo-fixed frequency over the input voltage range, hence it is called adaptive on-time control. The one-shot timer is reset and the high-side MOSFET is turned on again when the feedback voltage falls below the reference voltage.< Enable >The XCA204A0K1MR EN pin provides digital control to turn on/turn off the regulator. When the voltage of EN exceeds the threshold voltage, the regulator starts the soft start function. If the EN pin voltage is below than the shutdown threshold voltage, the regulator will be disable and into the shutdown mode.< Output Over Voltage Protection >When the FB pin voltage exceeds 25% of the regulation voltage, the output over voltage protection function will turn the high side MOSFET off.< Input Under Voltage Lockout (UVLO) >When the XCA204A0K1MR power on, the internal circuits are held inactive until VIN exceeds the input UVLO threshold voltage. And the regulator will be disabled when VIN below the input UVLO threshold voltage. The hysteretic of the UVLO comparator is 250mV.< Short Protection >The XCA204A0K1MR provides short protection function to prevent the device damage from short condition. When the output short to ground, the oscillator frequency is reduced to prevent the inductor current increasing beyond the current limit. In the meantime, the current limit is also reduced to lower the short current. Once the short condition is removed, the frequency and current limit will return to normal.< Thermal Shutdown >The XCA204A0K1MR incorporates an over temperature protection circuit to protect itself from overheating. When the junction temperature exceeds the thermal shutdown threshold temperature, the regulator will be shutdown.■Application Information< Output Voltage Setting >The external resistor divider is used to set the output voltage. XCA204A0K1MR feedback resistors are unconcerned of compensation and provide an easy way to program output voltage. Table 1 shows a list of resistor selection for common output voltages:V OUT = 0.765V x (1+R1/R2)< Selecting the Inductor >A 4.7μH inductor with a DC current rating of at least 30% percent higher than the maximum load current is recommended for most applications. For highest efficiency, the inductor's DC resistance should be less than 50mΩ. For most designs, the required inductance value can be derived from the following equation:ΔΔΔΔ=0.3×ΔΔLL (MMMMMM )LL ≥VVVVVVVV ffffff ⋅ΔΔΔΔ⋅�1−VVVVVVVVVVΔΔVV�Where ΔI is the inductor ripple current.Choose the inductor ripple current to be 30% of the maximum load current. The maximum inductor peak current is calculated from:ΔΔLL (MMMMMM )=ΔΔLLLLMMLL (MMMMMM )+ΔΔΔΔ2But when a coil with poor DC superimposition(DC bias) characteristics is used, the inductor peak current may increase due to the derating of the inductor during soft start. In this case, please use a coil with better DC superimposition (DC bias) characteristics.Under light load conditions below 100mA, a larger inductance is recommended for improved efficiency.< Selecting the Input Capacitor >The input capacitor reduces the surge current drawn from the input supply and the switching noise from the device. The input capacitor impedance at the switching frequency should be less than the input source impedance to prevent high frequency switching current from passing through the input. Ceramic capacitors with X5R or X7R dielectrics are highly recommended because of their low ESR and small temperature coefficients. For most applications, a 22μF capacitor is sufficient.< Selecting the Output Capacitor >The output capacitor keeps the output voltage ripple small and one or two 22μF ceramic capacitor with X5R or X7R dielectrics is recommended for its low ESR characteristics.< External Boost Diode Selection >An external bootstrap diode is recommended if the input voltage is less than 5.5V, or duty cycle is high, or if there is a 5V system rail available. This diode helps improve the efficiency. Low cost diodes, such as B0520 are suitable for this application.V IN 5V C5D1B0520V IN 5VC5D1B0520V OUT 3.3V IND1B0520XCA204A0K1MR■Note on use1. When the VIN voltage is lower than UVLO and the temperature is low, there is a possibility of step-down operation.2. When the input voltage is low, the maximum load current may decrease.3. Be especially careful of the capacitor characteristics and use X7R or X5R (EIA standard) ceramic capacitors.The capacitance decrease caused by the bias voltage may become remarkable depending on the external size of the capacitor.4. Even within the operating temperature range, the thermal shutdown function may operate depending on the input voltage, output voltage and output current. An example of derating characteristics is shown below.Please evaluate IC well on your PCB.< PCB Layout Recommendation >The device’s performance and stability is dramatically affected by PCB layout. It is recommended to follow these general guidelines show bellow:1. Place the input capacitors, output capacitors as close to the device as possible. Trace to these capacitors should be asshort and wide as possible to minimize parasitic inductance and resistance.2. CIN must be closes to Pins VIN and GND. The loop area formed by CIN and VIN/GND pins must be minimized.3. The GND trace between the output capacitor and the GND pin should be as wide as possible to minimize its raceimpedance.4. Do not allow switching current to flow under the device.5. Place feedback resistors close to the FB pin. A separate V OUT path should be connected to the upper feedback resistor6. Keep the sensitive signal (FB) away from the switching signal (SW). The trace of the FB node should be as small aspossible to avoid noise coupling.7. Multi-layer PCB design is recommended.■TYPICAL PERFORMANCE CHARACTERISTICSC1=22μF, C2=0.1μF, C3=C4=22μF, C5=C6=0.1μF, Ta = 25℃, unless otherwise noted.Efficiency TestVin=12VSteady StateVin=12V,Vout=1.8V,Iout=0ASteady StateVin=12V,Vout=1.8V,Iout=2.0A Vo u t S W ILS W Vo u t ILDynamic loadingVin=12V,Vout=1.8V,Iout=0.3 to 2.7A, 0.5A/usIo u tPower OnVin=12V,Vout=1.8V,Iout=2.0AEN Vo u t ILShut DownVin=12V,Vout=1.8V,Iout=2A ENVo u tILVo ut■PACKAGING INFORMATION●SOT23-6 (unit:mm)(PCB FOOTPRINT)NOTES:1. JEDEC OUTLINE: N/A2. DIMENSIONS “D” DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.MOLD FLASH,PROTRUSIONS AND GATE BURRS SHALL NOT EXCEED .15mm (.006in) PER SIDE.3. DIMENSIONS “E” DOES NOT INCLUDE INTER-LEAD FLASH, OR PROTRUSIONS. INTER-LEAD FLASH ANDPROTRUSIONS SHALL NOT EXCEED .25mm (.010in) PER SIDE.■MARKING RULE。

开关电源的用途开关电源产品广泛应用于工业自动化控制、军工设备、科研设备、LED照明、工控设备、通讯设备、电力设备、仪器仪表、医疗设备、半导体制冷制热、空气净化器，电子冰箱，液晶显示器，LED灯具，通讯设备，视听产品，安防，电脑机箱，数码产品和仪器类等领域开关电源的主要类型和分类开关电源的主要类型现代开关电源有两种：一种是直流开关电源；另一种是交流开关电源。

这里主要介绍的只是直流开关电源，其功能是将电能质量较差的原生态电源（粗电），如市电电源或蓄电池电源，转换成满足设备要求的质量较高的直流电压（精电）。

直流开关电源的核心是DC/DC转换器。

因此直流开关电源的分类是依赖DC/DC转换器分类的。

也就是说，直流开关电源的分类与DC/DC 转换器的分类是基本相同的，DC/DC转换器的分类基本上就是直流开关电源的分类。

直流DC/DC转换器按输入与输出之间是否有电气隔离可以分为两类：一类是有隔离的称为隔离式DC/DC转换器；另一类是没有隔离的称为非隔离式DC/DC转换器隔离式DC/DC转换器也可以按有源功率器件的个数来分类。

单管的DC/DC转换器有正激式（Forward）和反激式（Flyback）两种。

双管DC/DC转换器有双管正激式（DoubleTransistor Forward Converter），双管反激式（Double Transistr Flyback Converter）、推挽式（Push-Pull Converter）和半桥式（Half-Bridge Converter）四种。

四管DC/DC转换器就是全桥DC/DC转换器（Full-Bridge Converter）。

非隔离式DC/DC转换器，按有源功率器件的个数，可以分为单管、双管和四管三类。

单管DC/DC转换器共有六种，即降压式（Buck）DC/DC转换器，升压式（Boost）DC/DC转换器、升压降压式（Buck Boost）DC/DC转换器、Cuk DC/DC转换器、Zeta DC/DC转换器和SEPIC DC/DC转换器。

1.2产品特性：•典型待机功耗小于40mW；•输出最大持续电流500mA （峰值800mA),无音频噪音、发热低；•18-600VDC 超宽输入电压,可适应12-380VAC超宽电压输入；•全面的保护功能：•过流保护（OCP）•过温保护（OTP）•过压保护（OVP）•SOP8贴片封装；1.3典型应用（非隔离）：•替代低效率的阻容降压供电电路(如低压电器，智能电表，自动化仪表电源等)；•LED驱动•小家电电源•工业控制电源•其他非隔离辅助电源1.4输入电压/输出电流表：序号输入电压范围（DC 单位：V）输出电压（DC 单位：V）持续工作输出电流（Max 单位：mA)瞬时峰值电流（单位：mA)参考电路图号118-600 3.3500800图B1218-600 5.0500800图B2345-60012500800图B3445-60024500800图B4XD308H 是一款18-600V 超宽范围输入的非隔离高压降型AC-DC 转换器电源芯片，可适应12-380VAC 超宽电压输入(外部加整流滤波)，最大输出持续电流可以达到500mA（峰值800mA)，无音频噪音、发热低，内部集成全面完善的保护功能（短路保护，过载保护，输出过压保护、输出欠压保护，过热保护等）。

该电源芯片以较低的BOM 成本（外围元件数目极少）方便的实现宽电压高压降压小功率电源解决方案,广泛应用于非隔离型家电产品和工业产品等。

1.5封装参考：1.6引脚功能：编号名称描述备注1VCC/BP所有控制电路的电源。

外部旁路电容连接点2GND/S芯片参考地。

内部功率MOSFET的源极。

3FB反馈输入4CS电流检测5,6,7,8DRAIN内部功率MOSFET的漏极1.7功能框图：图11.8典型应用电路：1.9绝对最大额定值(备注1)：1.10推荐的工作条件(备注2)：参数数值单位工作环境温度-40to85°C1.11电气特性：=+25℃。

深圳市普顿电力设备有限公司一:通信电源简介普顿电力AC220-DC24V/48V 系列通信电源模块采用先进的高频脉宽调制技术，使效率得到了极大提高。

整机具有稳压精度高、动态响应快、输出杂音低、抗干扰能力强、工作温度范围宽等特点。

N+1模块组合结构，各模块间可自动均流均衡供电,可为电信、电力及无线基站组建高频开关电源系统。

表头型模块采用3位半的表头显示，显示输出电流电压，简单实用。

模块采用宽度为19"、高度为2U的标准机箱，易于安装。

可用于组成电源系统，并且模块可并联带电池使用，不需监控单元。

本电源模块适用于交流220VAC和直流220VDC的输入条件的使用场合。

本电源模块适用于直流输出24VDC 10A-60A DC 的输出条件的使用场合。

本电源模块适用于直流输出48VDC 5A-50A DC 的输出条件的使用场合。

二:通信电源工作方式1:AC220-DC24/48V时,把交流220V转换成直流24V或直流48V,供直流负载使用;当市电断电后,由电池组稳压输出;2:DC220-DC24/48V时,把直流220V降压至直流24V或直流48V,供直流负载使用;当市电断电后,由电池组稳压输出;3:带充放电管理型,当用户需要单独一个模块使用,并且能单独对电池进行充电时,可以选用带充电管理型的通信电源模块,在模块把AC220转换为DC24/48V输出时,同时也能对电池进行智能充电,当市电断电后,由电池组稳压输出;三:通信电源技术参数◆输入电压：单相三线制 AC：220V± 20%◆输入电流：≤10A（RMS）交流输入为220V，直流输出为48V时◆频率： 50Hz±10%◆功率因数：≥0.99◆效率：≥0.87◆启动冲击电流：≤150%Imax (额定输入状态下)◆保护功能：输入过欠压保护;输出过压保护;输出限流保护;短路保护;模块并联保护;过温保护;过流保护;◆输入过压关机： 265--275V◆输入欠压关机： 160--170V◆交流输入范围： 160--270V◆输出直流电压： 48VDC或-48VDC（42∽58V可调) 或24V(21∽29V可调)◆额定电流： 10A、20A、25A、30A、40A◆输出限流值： Ie+1A◆电压调整率：电压调整率不超过直流输出整定值的+0.1%◆负载调整率：不超过直流输出整定值的+0.5%◆稳压精度：不超过直流输出整定值的+0.5%◆电话衡重杂音：≤0.5mV◆峰峰值杂音：≤150mV◆宽频杂音电压：≤30 mV (3.4KHZ--150KHz)≤20 mV (150KHZ--30MHz)◆离散频率杂音电压：≤5 mV (3.4KHZ--150KHz)≤3 mV (150KHZ--200KHz)≤2 mV (200KHZ--500KHz)≤1 mV (500KHZ--30MHz)◆均流度：≤+5%◆显示精度：≤+5%◆软启动时间：3--8秒◆温度系数：不超过直流输出整定值的+0.2%◆绝缘电阻：≥10MΩ (室温环境下)◆绝缘强度：输入对地、输入对输出施加交流1500V/50Hz，输出对地施加交流500V/50Hz，1min无闪络，无击穿◆电磁兼容：符合信息产业部YD/T983-1998标准要求型号分别有：PD-4805 PD-4810 PD-4815 PD-4820 PD-4825 PD-4830 PD-4850PD-2405 PD-2410 PD-2420 PD-2430 PD-2440 PD-2450（举例:PD-4810 48指直流电压为48V 10指输出电流为10A）四：通信电源售后及包装为了让用户买得称心，用得放心，公司专门组织了一支训练有素的高水平技术队伍，从事售后服务工作。

非隔离降压型电源设计方案一款不带变压器的宽电压、低成本、非隔离式AC/DC降压转换器——输出持续电流500mA（2.5~12W)【关键词摘要】非隔离恒流恒压AC/DC电源芯片XD308H BUCK电路220V转5V220V转12V220V转24V380V转5V380V转12V380V转24V【概述】非隔离AC-DC电源芯片XD308H设计组成的降压恒流恒压电路，采用了BUCK电路拓扑结构，常用于小家电控制板电源以及工业控制电源供电。

其典型电路规格包含24V/500mA、12V/500mA和5V/500mA等，满足六级能效要求。

可通过雷击、EFT、浪涌等可靠性测试，可通过UL、CE、3C等认证。

其特点是：电路简单、BOM成本低（外围元件数目极少：无需变压器、光耦）,电源体积小、无异常噪音、损耗小发热低。

1）220V转24V降压电路：输入32~380Vac，输出24V/500mA电源方案如图所示的电路为一个典型的输出为24V/500mA的非隔离电源。

它通常应用于家用电器的(电饭煲、洗衣机及其它白色家电)。

此电路还适合于其它非隔离供电的应用，比如LED驱动、智能电表、加热器以及辅助电源和工业控制等。

220V转24V降压电路输入级由保险电阻RF1、防雷压敏电阻RV1、整流桥堆D1、EMI滤波电容C4和C5以及滤波电感L2组成。

保险电阻RF1为阻燃可熔的绕线电阻，它同时具备多个功能：a)将桥堆D1的浪涌电流限制在安全的范围；b)差模噪声的衰减；c)在其它任何元件出现短路故障时，充当输入保险丝的功能(元件故障时必须安全开路，不应产生任何冒烟、冒火及过热发光现象)。

压敏电阻RV1用于防雷保护，提高系统可靠性。

功率处理级由宽电压高效率电源芯片XD308H、续流二极管D2、输出电感L1及输出电容C3构成。

2）220V转12V降压电路：输入32~380Vac，输出12V/500mA电源方案如图所示的电路为一个典型的输出为12V/500mA的非隔离电源。

AC/DC Converter2 WattSingleOutputEMC Class BDescriptionThe RAC02-GB series are low cost AC/DC power supplies, ideal for PCB mounted, compact, board level industrial applications. They feature universal AC input voltage range, regulated and short-circuit-proof isolated DC outputs, low standby power consumption and -25°C to +80°C operating temperature range. The RAC02-GB have a built-in Class B / FCC Part 15 E MC filter, are certified to EN60950 and EN62368 safety standards and come with a three year warranty.FeaturesRegulated Converter• Universal input 85-264VAC• <250mW No load power consumption• -25°C to +80°C Operating temperature, with derating • Class II installations (without FG)• Continuous SCP , OCP• IEC/EN/UL60950 & IEC/EN/UL62368 certifiedRAC02-GB Selection GuidePart Input Output Output Efficiency Max. Capacitive Number Voltage Range Voltage Current typ Load (1) [VAC] [VDC] [mA] [%] [µF]RAC02-3.3SGB 85-264 3.3 500 63 500RAC02-05SGB 85-264 5 400 63 500RAC02-12SGB 85-264 12 167 68 200RAC02-15SGB 85-264 15 140 63 200Model NumberingOrdering Examples:RAC02-12SGB 12VoutSingle Output EMC Class BS inglenom. Output Power nom. Output VoltageRAC02-__ SGBEMC Class B ULIEC/EN60950-1 certified UL/IEC/EN62368-1 certifiedCAN/CSA-C22.2 No. 62368 certified IEC/EN62368-1 certified CB ReportY E A Rwa r r a n ty3E196683RoHS 2+compliant10 from 10REACHcompliantSpecifications (measured @ Ta= 25°C, nom. Vin (115/230VAC), full load and after warm-up unless otherwise stated)Specifications (measured @ Ta= 25°C, nom. Vin (115/230VAC), full load and after warm-up unless otherwise stated)Specifications (measured @ Ta= 25°C, nom. Vin (115/230VAC), full load and after warm-up unless otherwise stated)SAFETY AND CERTIFICATIONSCertificate Type (Safety) Report / File Number StandardInformation Technology Equipment, General Requirements for Safety SA1804152L01001IEC60950-1:2005 2nd Edition + Am2:2013 EN60950-1:2006 + A12:2011 + A2:2013Audio/Video, information and communication technology equipment - Part1: Safety requirements E196683-A5 andE19668-A6001UL62368-1, 2nd EditionCAN/CSA-C22.2 No. 62368-1-14Audio/Video, information and communication technology equipment -Part1: Safety requirements (CB Scheme)SA1804152S 001IEC62368-1:2014 2nd EditionAudio/Video, information and communication technology equipment -Part1: Safety requirementsEN62368-1:2014+A11:2017 RoHS2RoHS 2011/65/EU + AM2015/863continued on next pageSpecifications (measured @ Ta= 25°C, nom. Vin (115/230VAC), full load and after warm-up unless otherwise stated)EMC ComplianceConditionStandard / CriterionElectromagnetic compatibility of multimedia equipment - Emission requirements EA1804152E 01001EN55032, Class BInformation technology equipment - Immunity characteristics - Limits and methods of measurementEN55024:2010 + A1:2015ESD Electrostatic discharge immunity testAir ±2, 4, 8kV Contact ±2, 4kVEN61000-4-2:2009, Criteria ARadiated, radio-frequency, electromagnetic field immunity test 3V/mEN61000-4-3:2006 + A2:2010, Criteria AFast Transient and Burst Immunity AC Power Port: ±1.0kV EN61000-4-4:2012, Criteria A Surge ImmunityAC Power Port: L-N ±1.0kVEN61000-4-5:2014, Criteria B Immunity to conducted disturbances, induced by radio-frequency fields AC Power Port 3V EN61000-4-6:2014, Criteria A Power Magnetic Field Immunity 50Hz, 1A/m EN61000-4-8:2009, Criteria A Voltage Dips and Interruption Voltage Dips >95%EN61000-4-11:2004, Criteria A Voltage Dips 30%EN61000-4-11:2004, Criteria B Voltage Interruptions >95%EN61000-4-11:2004, Criteria BLimits of Voltage Fluctuations & FlickerEN61000-3-3:2013Specifications (measured @ Ta= 25°C, nom. Vin (115/230VAC), full load and after warm-up unless otherwise stated)PACKAGING INFORMATIONParameter Type Value Packaging Dimension (LxWxH)tube470.0 x 36.4 x 26.4mm Packaging Quantity20pcs Storage Temperature Range-25°C to +85°C Storage Humidity non-condensing5% - 95% RH max.The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer. The products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorizeduse of RECOM products in such safety-critical applications.。