uln2803a中文资料2

一文看懂uln2803和uln2003区别描述一、ULN2003介绍ULN2003是高耐压、大电流复合晶体管阵列，由七个硅NPN复合晶体管组成，每一对达林顿都串联一个2.7K的基极电阻，在5V的工作电压下它能与TTL和CMOS电路直接相连，可以直接处理原先需要标准逻辑缓冲器来处理的数据。

ULN2003特点：ULN2003的每一对达林顿都串联一个2.7K的基极电阻，在5V的工作电压下它能与TTL和CMOS电路直接相连，可以直接处理原先需要标准逻辑缓冲器来处理的数据。

ULN2003工作电压高，工作电流大，灌电流可达500mA，并且能够在关态时承受50V的电压，输出还可以在高负载电流并行运行。

ULN2003采用DIP—16或SOP—16塑料封装。

ULN2003引脚及功能：引脚1：CPU脉冲输入端，端口对应一个信号输出端。

引脚2：CPU脉冲输入端。

引脚3：CPU脉冲输入端。

引脚4：CPU脉冲输入端。

引脚5：CPU脉冲输入端。

引脚6：CPU脉冲输入端。

引脚7：CPU脉冲输入端。

引脚8：接地。

引脚9：该脚是内部7个续流二极管负极的公共端，各二极管的正极分别接各达林顿管的集电极。

用于感性负载时，该脚接负载电源正极，实现续流作用。

如果该脚接地，实际上就是达林顿管的集电极对地接通。

引脚10：脉冲信号输出端，对应7脚信号输入端。

引脚11：脉冲信号输出端，对应6脚信号输入端。

引脚12：脉冲信号输出端，对应5脚信号输入端。

引脚13：脉冲信号输出端，对应4脚信号输入端。

引脚14：脉冲信号输出端，对应3脚信号输入端。

引脚15：脉冲信号输出端，对应2脚信号输入端。

引脚16：脉冲信号输出端，对应1脚信号输入端。

ULN2003作用：ULN2003是大电流驱动阵列，多用于单片机、智能仪表、PLC、数字量输出卡等控制电路中。

可直接驱动继电器等负载。

输入5VTTL电平，输出可达500mA/50V。

ULN2003是高耐压、大电流达林顿系列，由七个硅NPN达林顿管组成。

2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENT DARLINGTON ARRAYSTest Applicable Limits Characteristic Symbol Fig.DevicesTest Conditions Min.Typ.Max.Units Output Leakage CurrentI CEX1A All V CE = 50 V, T A = 25°C —< 150µA V CE = 50 V, T A = 70°C—< 1100µA 1BULx2804xV CE = 50 V, T A = 70°C, V IN = 1.0 V —< 5500µA Collector-Emitter V CE(SAT)2AllI C = 100 mA, I B = 250 µA —0.9 1.1V Saturation Voltagel C = 200 mA, I B = 350 µA — 1.1 1.3V I C = 350 mA, I B = 500 µA— 1.3 1.6V Input CurrentI IN(ON)3ULx2803x V IN = 3.85 V —0.93 1.35mA ULx2804xV IN = 5.0 V —0.350.5mA V IN = 12 V— 1.0 1.45mA I IN(OFF)4All l C = 500 µA, T A = 70°C 5065—µA Input VoltageV IN(ON)5ULx2803xV CE = 2.0 V, l C = 200 mA —— 2.4V V CE = 2.0 V, I C = 250 mA —— 2.7V V CE = 2.0 V, l C = 300 mA—— 3.0V ULx2804xV CE = 2.0 V, l C = 125 mA —— 5.0V V CE = 2.0 V, l C = 200 mA —— 6.0V V CE = 2.0 V, I C = 275 mA ——7.0V V CE = 2.0 V, l C = 350 mA——8.0V Input Capacitance C IN —All —1525pF Turn-On Delay t PLH 8All 0.5 E IN to 0.5 E OUT —0.25 1.0µs Turn-Off Delay t PHL 8All 0.5 E IN to 0.5 E OUT —0.25 1.0µs Clamp Diode I R 6All V R = 50 V, T A = 25°C ——50µA Leakage Current V R = 50 V, T A = 70°C ——100µA Clamp Diode V F7AllI F = 350 mA—1.72.0VForward VoltageComplete part number includes prefix to operating temperature range: ULN = -20°C to +85°C, ULQ = -40°C to +85°C and a suffix to identify package style: A = DIP, LW = SOIC.Types ULx2803A, ULx2803LW, ULx2804A, and ULx2804LWELECTRICAL CHARACTERISTICS at +25°C (unless otherwise noted).2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENTDARLINGTON ARRAYS115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-5000Test Applicable Limits Characteristic Symbol Fig.DevicesTest Conditions Min.Typ.Max.Units Output Leakage CurrentI CEX1A All V CE = 95 V, T A = 25°C —< 150µA V CE = 95 V, T A = 70°C—< 1100µA 1BULx2824xV CE = 95 V, T A = 70°C, V IN = 1.0 V —< 5500µA Collector-Emitter V CE(SAT)2AllI C = 100 mA, I B = 250 µA —0.9 1.1V Saturation Voltagel C = 200 mA, I B = 350 µA — 1.1 1.3V I C = 350 mA, I B = 500 µA— 1.3 1.6V Input CurrentI IN(ON)3ULx2823x V IN = 3.85 V —0.93 1.35mA ULx2824xV IN = 5.0 V —0.350.5mA V IN = 12 V— 1.0 1.45mA I IN(OFF)4All l C = 500 µA, T A = 70°C 5065—µA Input VoltageV IN(ON)5ULx2823xV CE = 2.0 V, l C = 200 mA —— 2.4V V CE = 2.0 V, I C = 250 mA —— 2.7V V CE = 2.0 V, l C = 300 mA—— 3.0V ULx2824xV CE = 2.0 V, l C = 125 mA —— 5.0V V CE = 2.0 V, l C = 200 mA —— 6.0V V CE = 2.0 V, I C = 275 mA ——7.0V V CE = 2.0 V, l C = 350 mA——8.0V Input Capacitance C IN —All —1525pF Turn-On Delay t PLH 8All 0.5 E IN to 0.5 E OUT —0.25 1.0µs Turn-Off Delay t PHL 8All 0.5 E IN to 0.5 E OUT —0.25 1.0µs Clamp Diode I R 6All V R = 95 V, T A = 25°C ——50µA Leakage Current V R = 95 V, T A = 70°C ——100µA Clamp Diode V F7AllI F = 350 mA—1.72.0VForward VoltageComplete part number includes prefix to operating temperature range: ULN = -20°C to +85°C, ULQ = -40°C to +85°Cand a suffix to identify package style: A = DIP, LW = SOIC. Note that the ULQ2823LW and ULQ2824LW are not presently available.Types ULx2823A, ULN2823LW, ULx2824A, and ULN2824LWELECTRICAL CHARACTERISTICS at +25°C (unless otherwise noted).2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENTDARLINGTON ARRAYS115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-500020Dwg. GP-070-44010080DUTY CYCLE IN PER CENT0600400O U T P U T C U R R E N T I N m A /C H A N N E L2006020Dwg. GP-070-34010080DUTY CYCLE IN PER CENT0600400O U T P U T C U R R E N T I N m A /C H A N N E L20060ALLOWABLE COLLECTOR CURRENT AS A FUNCTION OF DUTY CYCLEULx28xxLW20Dwg. GP-070-24010080DUTY CYCLE IN PER CENT 0600400O U T P U T C U R R E N T I N m A /C H A N N E L2006020Dwg. GP-070-14010080DUTY CYCLE IN PER CENT 0600400O U T P U T C U R R E N T I N m A /C H A N N E L20060ALLOWABLE COLLECTOR CURRENT AS A FUNCTION OF DUTY CYCLEULx28xxAx = Characters to identify specific device. Specification shown applies to family of devices with remaining digits as shown.2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENT DARLINGTON ARRAYSINPUT CURRENT AS AFUNCTION OF INPUT VOLTAGEULx28x3xDwg. GP-069INPUT VOLTAGE2.52.0I N P U T C U R R E N T I N m A — II N1.00.51.50.5Dwg. GP-0671.01.5COLLECTOR-EMITTER SATURATION VOLTAGE0600400C O L L E C T O R C U R R E N T I N m A200COLLECTOR CURRENT AS A FUNCTION OF INPUT CURRENT200Dwg. GP-068400INPUT CURRENT IN µA0600400C O L L E C T O R C U R R E N T I N m A200ULx28x4x6Dwg. GP-069-11012INPUT VOLTAGE52.0I N P U T C U R R E N T I N m A — I I N1.00.51.587911SATURATION VOLTAGE AS A FUNCTION OFCOLLECTOR CURRENTx = Characters to identify specific device. Characteristic shown applies to family of devices with remaining digits as shown.2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENTDARLINGTON ARRAYS115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-5000PACKAGE DESIGNATOR “A” DIMENSIONSDimensions in Inches (controlling dimensions)Dimensions in Millimeters (for reference only)NOTES:1.Exact body and lead configuration at vendor’s option within limits shown.2.Lead spacing tolerance is non-cumulative.3.Lead thickness is measured at seating plane or below.Dwg. MA-001-18A in19Dwg. MA-001-18A mm192803THRU2824HIGH-VOLTAGE,HIGH-CURRENT DARLINGTON ARRAYS PACKAGE DESIGNATOR “LW” DIMENSIONSDimensions in Inches(for reference only)Dimensions in Millimeters(controlling dimensions)Dwg. MA-008-18A mm1.27BSCDwg. MA-008-18A inBSCNOTES:1.Exact body and lead configuration at vendor’s option within limits shown.2.Lead spacing tolerance is non-cumulative.2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENTDARLINGTON ARRAYS115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-5000The products described here are manufactured under one or more U.S. patents or U.S. patents pending.Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, ormanufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current.Allegro products are not authorized for use as critical components in life-support devices or systems without express written approval.The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsi-bility for its use; nor for any infringement of patents or other rights of third parties which may result from its use.。

PACKAGING INFORMATIONOrderable Device Status (1)Package Type Package Drawing Pins Package Qty Eco Plan (2)Lead/Ball Finish MSL Peak Temp (3)ULN2803ADW ACTIVE SOIC DW 1840Green (RoHS &no Sb/Br)CU NIPDAU Level-2-260C-1YEAR ULN2803ADWG4ACTIVE SOIC DW 1840Green (RoHS &no Sb/Br)CU NIPDAU Level-2-260C-1YEAR ULN2803ADWR ACTIVE SOIC DW 182000Green (RoHS &no Sb/Br)CU NIPDAU Level-2-260C-1YEAR ULN2803ADWRG4ACTIVE SOIC DW 182000Green (RoHS &no Sb/Br)CU NIPDAU Level-2-260C-1YEAR ULN2803AN ACTIVE PDIP N 1820Pb-Free (RoHS)CU NIPDAU N /A for Pkg Type ULN2803ANE4ACTIVEPDIPN1820Pb-Free (RoHS)CU NIPDAUN /A for Pkg Type(1)The marketing status values are defined as follows:ACTIVE:Product device recommended for new designs.LIFEBUY:TI has announced that the device will be discontinued,and a lifetime-buy period is in effect.NRND:Not recommended for new designs.Device is in production to support existing customers,but TI does not recommend using this part in a new design.PREVIEW:Device has been announced but is not in production.Samples may or may not be available.OBSOLETE:TI has discontinued the production of the device.(2)Eco Plan -The planned eco-friendly classification:Pb-Free (RoHS),Pb-Free (RoHS Exempt),or Green (RoHS &no Sb/Br)-please check /productcontent for the latest availability information and additional product content details.TBD:The Pb-Free/Green conversion plan has not been defined.Pb-Free (RoHS):TI's terms "Lead-Free"or "Pb-Free"mean semiconductor products that are compatible with the current RoHS requirements for all 6substances,including the requirement that lead not exceed 0.1%by weight in homogeneous materials.Where designed to be soldered at high temperatures,TI Pb-Free products are suitable for use in specified lead-free processes.Pb-Free (RoHS Exempt):This component has a RoHS exemption for either 1)lead-based flip-chip solder bumps used between the die and package,or 2)lead-based die adhesive used between the die and leadframe.The component is otherwise considered Pb-Free (RoHS compatible)as defined above.Green (RoHS &no Sb/Br):TI defines "Green"to mean Pb-Free (RoHS compatible),and free of Bromine (Br)and Antimony (Sb)based flame retardants (Br or Sb do not exceed 0.1%by weight in homogeneous material)(3)MSL,PeakTemp.--The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications,and peak solder temperature.Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.TI bases its knowledge and belief on information provided by third parties,and makes no representation or warranty as to the accuracy of such information.Efforts are underway to better integrate information from third parties.TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.TI and TI suppliers consider certain information to be proprietary,and thus CAS numbers and other limited information may not be available for release.In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s)at issue in this document sold by TI to Customer on an annual basis.PACKAGE OPTION ADDENDUM5-Feb-2007Addendum-Page 1元器件交易网IMPORTANT NOTICETexas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,enhancements, improvements, and other changes to its products and services at any time and todiscontinue any product or service without notice. Customers should obtain the latest relevant informationbefore placing orders and should verify that such information is current and complete. All products are soldsubject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.TI warrants performance of its hardware products to the specifications applicable at the time of sale inaccordance with TI’s standard warranty. Testing and other quality control techniques are used to the extentTI deems necessary to support this warranty. Except where mandated by government requirements, testingof all parameters of each product is not necessarily performed.TI assumes no liability for applications assistance or customer product design. Customers are responsiblefor their products and applications using TI components. To minimize the risks associated with customerproducts and applications, customers should provide adequate design and operating safeguards.TI does not warrant or represent that any license, either express or implied, is granted under any TI patentright, copyright, mask work right, or other TI intellectual property right relating to any combination, machine,or process in which TI products or services are used. Information published by TI regarding third-partyproducts or services does not constitute a license from TI to use such products or services or a warranty orendorsement thereof. Use of such information may require a license from a third party under the patents orother intellectual property of the third party, or a license from TI under the patents or other intellectualproperty of TI.Reproduction of information in TI data books or data sheets is permissible only if reproduction is withoutalteration and is accompanied by all associated warranties, conditions, limitations, and notices.Reproduction of this information with alteration is an unfair and deceptive business practice. TI is notresponsible or liable for such altered documentation.Resale of TI products or services with statements different from or beyond the parameters stated by TI forthat product or service voids all express and any implied warranties for the associated TI product or serviceand is an unfair and deceptive business practice. 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2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENTDARLINGTON ARRAYS115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-50002Copyright © 1977, 2001 Allegro MicroSystems, Inc.*Also available for operation between -40°C and +85°C. To order, change prefix from ‘ULN’ to ‘ULQ’.DEVICE PART NUMBER DESIGNATION5075100125150AMBIENT TEMPERATURE IN °C25Dwg. GP-018BA L L O W AB L E P AC K A G E P O W E RD I S S I P A T I O N I N W A T T Sx = Character to identify specific device. Specification shown applies to family of devices with remaining digits as shown. See matrix above.The ULx2804, ULx2823, & ULx2824 are discontinued.Shown for reference only.2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENT DARLINGTON ARRAYS3Complete part number includes prefix to operating temperature range: ULN = -20°C to +85°C, ULQ = -40°C to +85°C and a suffix to identify package style: A = DIP, LW = SOIC.Types ULx2803A, ULx2803LW, ULx2804A, and ULx2804LWELECTRICAL CHARACTERISTICS at +25°C (unless otherwise noted).The ULx2804 is discontinued.Shown for reference only.2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENTDARLINGTON ARRAYS115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-50004Complete part number includes prefix to operating temperature range: ULN = -20°C to +85°C, ULQ = -40°C to +85°Cand a suffix to identify package style: A = DIP, LW = SOIC. Note that the ULQ2823LW and ULQ2824LW are not presently available.Types ULx2823A, ULN2823LW, ULx2824A, and ULN2824LWELECTRICAL CHARACTERISTICS at +25°C (unless otherwise noted).The ULx2823 & ULx2824 are discontinued.Shown for reference only.2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENTDARLINGTON ARRAYS115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-5000620Dwg. GP-070-44010080DUTY CYCLE IN PER CENT0600400O U T P U T C U R R E N T I N m A /C H A N N E L2006020Dwg. GP-070-34010080DUTY CYCLE IN PER CENT0600400O U T P U T C U R R E N T I N m A /C H A N N E L20060ALLOWABLE COLLECTOR CURRENT AS A FUNCTION OF DUTY CYCLEULx28xxLW20Dwg. GP-070-24010080DUTY CYCLE IN PER CENT 0600400O U T P U T C U R R E N T I N m A /C H A N N E L2006020Dwg. GP-070-14010080DUTY CYCLE IN PER CENT 0600400O U T P U T C U R R E N T I N m A /C H A N N E L20060ALLOWABLE COLLECTOR CURRENT AS A FUNCTION OF DUTY CYCLEULx28xxAx = Characters to identify specific device. Specification shown applies to family of devices with remaining digits as shown.2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENT DARLINGTON ARRAYS7INPUT CURRENT AS AFUNCTION OF INPUT VOLTAGEULx28x3xDwg. GP-069INPUT VOLTAGE2.52.0I N P U T C U R R E N T I N m A — II N1.00.51.50.5Dwg. GP-0671.01.5COLLECTOR-EMITTER SATURATION VOLTAGE0600400C O L L E C T O R C U R R E N T I N m A200COLLECTOR CURRENT AS A FUNCTION OF INPUT CURRENT200Dwg. GP-068400INPUT CURRENT IN µA0600400C O L L E C T O R C U R R E N T I N m A200ULx28x4x6Dwg. GP-069-11012INPUT VOLTAGE52.0I N P U T C U R R E N T I N m A — II N1.00.51.587911SATURATION VOLTAGE AS A FUNCTION OFCOLLECTOR CURRENTx = Characters to identify specific device. Characteristic shown applies to family of devices with remaining digits as shown.2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENTDARLINGTON ARRAYS115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-50008PACKAGE DESIGNATOR “A” DIMENSIONSDimensions in Inches (controlling dimensions)Dimensions in Millimeters (for reference only)NOTES:1.Exact body and lead configuration at vendor’s option within limits shown.2.Lead spacing tolerance is non-cumulative.3.Lead thickness is measured at seating plane or below.Dwg. MA-001-18A in19Dwg. MA-001-18A mm192803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENT DARLINGTON ARRAYS9PACKAGE DESIGNATOR “LW” DIMENSIONSDimensions in Inches (for reference only)Dimensions in Millimeters (controlling dimensions)Dwg. MA-008-18A mm1.27BSCwg. MA-008-18A inBSCNOTES:1.Exact body and lead configuration at vendor’s option within limits shown.2.Lead spacing tolerance is non-cumulative.2803 THRU 2824HIGH-VOLTAGE,HIGH-CURRENTDARLINGTON ARRAYS115 Northeast Cutoff, Box 15036Worcester, Massachusetts 01615-0036 (508) 853-500010The products described here are manufactured under one or more U.S. patents or U.S. patents pending.Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, ormanufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current.Allegro products are not authorized for use as critical components in life-support devices or systems without express written approval.The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsi-bility for its use; nor for any infringement of patents or other rights of third parties which may result from its use.This datasheet has been download from: Datasheets for electronics components.。

要：ULN2000、ULN2800是高压大电流达林顿晶体管阵列系列产品,具有电流增益高、工作电压高、温度范围宽、带负载能力强等特点,适应于各类要求高速大功率驱动的系统。

ULN2003A电路是美国Texas Instruments公司和Sprague公司开发的高压大电流达林顿晶体管阵列电路,文中介绍了它的电路构成、特征参数及典型应用。

关键词：达林顿晶体管阵列驱动电路ULN2003 ULN2000系列ULN2800系列1 概述功率电子电路大多要求具有大电流输出能力,以便于驱动各种类型的负载。

功率驱动电路是功率电子设备输出电路的一个重要组成部分。

在大型仪器仪表系统中,经常要用到伺服电机、步进电机、各种电磁阀、泵等驱动电压高且功率较大的器件。

ULN2000、ULN2800高压大电流达林顿晶体管阵列系列产品就属于这类可控大功率器件,由于这类器件功能强、应用范围语广。

因此,许多公司都生产高压大电流达林顿晶体管阵列产品,从而形成了各种系列产品,ULN2000、ULN2800系列就是美国Texas Instruments公司、美国Sprague公司开发的高压大电流达林顿晶体管阵列产品。

它们的系列型号分类如表1所列,生产2000、2800高压大电流达林顿晶体管阵列系列产品的公司与型号对照表如表2所列。

在上述系列产品中,ULN2000系列能够同时驱动7组高压大电流负载,ULN2800系列则能够同时驱动8组高压大电流负载。

美国Texas Instruments公司、美国Sprague公司生产的ULN2003A由7组达林顿晶体管阵列和相应的电阻网络以及钳位二极管网络构成,具有同时驱动7组负载的能力,为单片双极型大功率高速集成电路。

以下介绍该电路的构成、性能特征、电参数以及典型应用。

2000、2800高压大电流达林顿晶体管阵列系列中的其它产品的性能特性与应用可参考ULN2003A。

表1 ULN2000、ULN2800系列型号分类表输出电压50V50V95V50V50V95V输出电流500mA600mA500mA500mA600mA500mA型号型号普通PMOS、CMOS输入ULN2001A ULN2011A ULN2021ULN2801A ULN2811A ULN2821A 14～25C PMOS输入ULN2002A ULN2012A ULN2022ULN2802A ULN2812A ULN2822A 5V TTL、CMOS输入ULN2003A ULN2013A ULN2023A ULN2803A ULN2813A ULN2823A 6～15V PMOS、CMOS输入ULN2004A ULN2014A ULN2024A ULN2804A ULN2814A ULN2824A 高输出TTL接口ULN2005A ULN2015A ULN2025A ULN2805A ULN2815A ULN2825AULN200A电路具有以下特点：●电流增益高（大于1000）;●带负载能力强（输出电流大于500mA）;●温度范围宽（-40～85℃）;●工作电压高（大于50V）。

ULN2802 ULN2803 ULN2804A 8个NPN达林顿晶体管，连接在阵列非常适合逻辑接口电平数字电路〔例如TTL，CMOS或PMOS上/ NMOS〕和较高的电流/电压，如电灯，电磁阀，继电器，打印锤或其他类似的负载，广泛的使用范围：计算机，工业和消费应用。

所有设备功能由集电极输出和钳位二极管瞬态抑制。

该ULN2803是专为符合标准TTL，而制造ULN2804适合6至15V的高级别CMOS或PMOS上。

该电路为反向输出型，即输入低电平电压，输出端才能导通工作。

图一引脚图1-8引脚：输入端11-18引脚：输出端9引脚：地端10引脚：电源+图二ULN2803内部电路图〔1/8单元〕图二ULN2804内部电路图〔1/8单元〕MAXIMUM RATINGS (TA = 25℃and rating apply to any one device in thepackage, unless otherwise noted.)最大额定值Rating 参数Symbol 符号Value 数值Unit 单位Outputvoltage 输出电压VO 50 V Inputvoltage (Except ULN2801) 输入电压〔除ULN2801 〕VI 30 V订购信息(VCE = 2.0v, IC = 125mA) ULN2804 5.0 (VCE = 2.0v, IC = 200mA) ULN2804 6.0 (VCE = 2.0v, IC = 275mA) ULN28047.0 (VCE = 2.0v, IC = 350mA) ULN2804 8.0Input Current–Off Condition 输入电流开关条件(Figure3)(IC=500mA,TA=+70℃)所有类型II(off) 50 100 –μADC Current Gain (Figure 2)直流电流增益(VCE=2.0v, IC=350mA)ULN2801 hFE 1000 –––Input Capacitance 输入电容CI –15 25 pF Turn–On Delay Time 开启延迟时间(50% EI to 50% EO) ton –0.25 1.0 μs Turn–Off Delay Time 关断延迟时间(50% EI to 50% EO) toff –0.25 1.0 μsClamp Diode Leakage Current (Figure 6)钳位二极管漏电流(VR=50v) TA = +25℃IR ––50μA TA = +70℃100Clamp Diode Forwardvoltage(Figure 7)钳位二极管正向电压(IF=350mA)VF – 1.5 2.0 V 测试图:图1 图2图3 图4图5 图6图7图四封装图应用电路图：图五步进电机驱动器图六二相步进电机驱动器图七LED发光二极管驱动器电路。

ULN2802 ULN2803 ULN2804A 8个NPNxx晶体管，连接在阵列非常适合逻辑接口电平数字电路（例如TTL，CMOS或PMOSxx/ NMOS）和较高的电流/电压，如电灯，电磁阀，继电器，打印锤或其他类似的负载，广泛的使用范围：计算机，工业和消费应用。

所有设备功能由集电极输出和钳位二极管瞬态抑制。

该ULN2803
是专为符合标准TTL，而制造ULN2804适合6至15V 的高级别CMOS或PMOSxx。

该电路为反向输出型，即输入低电平电压，输出端才能导通工作。

图一图
1-8：输入端
11-18：输出端
9：地端
10：电源+
图二 ULN2803内部电路图（1/8单元）图二 ULN2804内部电路图（1/8单元）
MAXIMUM RATINGS (TA = 25℃ and rating apply to any one device in the
package, unless otherwise noted.)最大额定值
订购信息
ELECTRICAL CHARACTERISTICS (TA = 25℃, unless otherwise noted)电气特性:
测试图:
图1 图2
图3 图4
图5 图6
图7
图四封装图
应用电路图：
图五步进电机驱动器
图六二相步进电机驱动器
图七 LED发光二极管驱动器电路。

ULN2802 ULN2803 ULN2804A 8个NPN达林顿晶体管，连接在阵列非常适合逻辑接口电平数字电路（例如TTL，CMOS或PMOS上/ NMOS）和较高的电流/电压，如电灯，电磁阀，继电器，打印锤或其他类似的负载，广泛的使用范围：计算机，工业和消费应用。

所有设备功能由集电极输出和钳位二极管瞬态抑制。

该ULN2803是专为符合标准TTL，而制造ULN2804适合6至15V的高级别CMOS或PMOS上。

该电路为反向输出型，即输入低电平电压，输出端才能导通工作。

图一引脚图
1-8引脚：输入端
11-18引脚：输出端
9引脚：地端
10引脚：电源+
图二ULN2803内部电路图（1/8单元）图二ULN2804内部电路图（1/8单元）
MAXIMUM RATINGS (TA = 25℃and rating apply to any one device in the package, unless otherwise noted.)最大额定值
订购信息
测试图:
图1 图2
图3 图4
图5 图6
图7
图四封装图
应用电路图：
图五步进电机驱动器
图六二相步进电机驱动器
图七LED发光二极管驱动器电路。

要： ULN2000、 ULN2800是高压大电流达林顿晶体管阵列系列产品, 具有电流增益高、工作电压高、温度范围宽、带负载能力强等特点, 适应于各类要求高速大功率驱动的系统。

ULN2003A电路是美国Texas Instruments 公司和 Sprague 公司开发的高压大电流达林顿晶体管阵列电路, 文中介绍了它的电路构成、特征参数及典型应用。

关键词：达林顿晶体管阵列驱动电路ULN2003 ULN2000系列ULN2800系列1概述功率电子电路大多要求具有大电流输出能力,以便于驱动各种类型的负载。

功率驱动电路是功率电子设备输出电路的一个重要组成部分。

在大型仪器仪表系统中, 经常要用到伺服电机、步进电机、各种电磁阀、泵等驱动电压高且功率较大的器件。

ULN2000、 ULN2800高压大电流达林顿晶体管阵列系列产品就属于这类可控大功率器件, 由于这类器件功能强、应用范围语广。

因此, 许多公司都生产高压大电流达林顿晶体管阵列产品, 从而形成了各种系列产品,ULN2000、ULN2800系列就是美国Texas Instruments 公司、美国 Sprague 公司开发的高压大电流达林顿晶体管阵列产品。

它们的系列型号分类如表 1 所列 , 生产 2000、2800 高压大电流达林顿晶体管阵列系列产品的公司与型号对照表如表 2 所列。

在上述系列产品中,ULN2000 系列能够同时驱动 7 组高压大电流负载 ,ULN2800 系列则能够同时驱动8 组高压大电流负载。

美国Texas Instruments 公司、美国 Sprague 公司生产的 ULN2003A由 7 组达林顿晶体管阵列和相应的电阻网络以及钳位二极管网络构成, 具有同时驱动 7 组负载的能力 , 为单片双极型大功率高速集成电路。

以下介绍该电路的构成、性能特征、电参数以及典型应用。

2000、2800 高压大电流达林顿晶体管阵列系列中的其它产品的性能特性与应用可参考ULN2003A。

uln2803步进电机的控制原理电路图和源程序步进电机的控制原理和程序选自北航出版耿德根主编《高速嵌入式单片机原理与应用》第七章7.4.2源程序:SLAVR742.ASM自从六十年代初期步进电机面世以来,在过去几年它的重要性大大提高了。

它用来驱动时钟和其他采用指针的仪器,打印机、绘图仪、磁盘光盘驱动器、各种自动控制阀、各种工具,还有机器人等的机械装置。

关于马进电机工作原理请参考有关资料。

下面用单极1-2相激磁方法步进电机做实验,即1极、2极、1极、2极、....极以次循环,如何用单极二相激该方法控制步进电机,由读者或用户自行编制程序实验。

;实验选用4.5V步进电机,用5V即可,实验时节省一组步进电机驱动电源;;型号:MA82135; 相数:2相; 电压:4.5V; 电流/相:0.12A; 电阻欧姆:34Ω/相; 重量:30g;*********************************************;* 步进电机控制程序(单极1-2相) *;* *;*SLAVR742.ASM *;*use ULN2803 ;使用PC0-PC3 驱动步进电机*;*use 11-17new bord *;*********************************************.include"8515def.inc".def temp =r16.def dt =r19.def np =r17.def step =r18.def TStep =r20.def cnt =r21.equ turntab=0x0200.org $0000rjmp RESET.cseg.org 0x010RESET:ldi temp,low(RAMEND) ;设堆栈out SPL,templdi temp,high(RAMEND)out SPL+1,tempser TEMP ;C口设置为输出OUT ddrc,TEMPldi zl,low(turntab*2) ;步进电机旋转资料指针ldi zh,high(turntab*2)ldi np,4ldi temp,$44out portc,temp ;初始化ldi TStep,$25rcall delayldi cnt,10cltrep: ldi step,192ldi TStep,1 ;1--255rcall turndec cntbrne reploop: noprjmp loop;************************************************************* ; t=1 uncircle turn ;T=1逆时针转*; t=0 circle turn ;T=0顺时针转*; 96 step a turn *; TStep is time of a step ; *;*************************************************************turn: brts uncircle ;判转向inc np ;正转cpi np,8brne nextclr npnext: push zladd zl,nplpmout portc,r0pop zlrcall delaydec stepbrne turnretuncircle: ;反转dec npcpi np,$ffbrne nextldi np,$07rjmp nextdelay: push TStep ;延时子程序del1: ldi dt,70del2: push dtdel3: dec dtbrne del3pop dtdec dtbrne del2dec TStepbrne del1pop TStepret.org turntab; 0 1 2 3 4 5 6 7 ;步进电机旋转资料表.db 0x11,0x99,0x88,0xcc,0x44,0x66,0x22,0x33＃i nclude<reg51.h>#define uint unsigned int#define uchar unsigned char#define ms *77// f = 12 M#define LEDLen 4#define Dj_star() {IE=0x81; pri_dj=0; }#define Dj_stop() {IE=0x00; pri_dj=1; P1=0xff; shache="0"; delay(800ms); delay (800ms);delay(400ms); shache = 1; }#define Chilun_Num 8/* 齿轮数 8 个*/#define set_display_num() { LEDBuf[0] = tmp / 1000; LEDBuf[1] = tmp / 100 % 10; \LEDBuf[2] = tmp / 10 % 10; LEDBuf[3] = tmp % 10; }uchar LEDBuf[LEDLen] = {0,0,0,0};void read_num (); /* 读播码盘到 set_round_ num * 8 */void display ();void delay(uint delay_time) { uint i; for (i=0; i < delay_time ; i+ +) ; }void run ();void fx_run();uint round_num = 0; /* 记录已转的齿轮数 , 中断1次加 1*/uint set_round_num = 0; /* 播码盘设置圈数 */uint set_pwm_width = 0; /* 播码盘设置步进电机正向速度 */bit one_round_flg = 0;sbit led_1000 = P0^7; //use for displaysbit led_100 = P0^6; //use for displaysbit led_10 = P0^5; //use for displaysbit led_1 = P0^4; //use for displaysbit key_start = P3^0;sbit key_puse = P3^0;sbit key_clear = P3^1;/* P 3^2 接齿轮传感器中断 */sbit bujin_zx_stop = P3^3; /* 接步进电机 ,正向到位传感器 ,为 0 停机 */sbit bujin_fx_stop = P3^4; /* 接步进电机 ,反向到位传感器 ,为 0 停机 */sbit shache = P3^5; /* 接刹车控制继电器 0 电位有效 */sbit pri_dj = P3^6; /* 接主电机控制继电器 0电位有效 */void main(){TCON = 0x01;display();while(1) {IE="0x00";round_num = 0;display();if ( bujin_fx_stop ) fx_run();while ( key_start );delay ( 8ms );if(!key_start){read_num();//set_round_num = 8;while ( !key_start );run ();fx_run();}}}void run () {#define Delay_time 180/* 转一圈 50 次循环，每循环 4 步，50 * 4 = 200 ， 200 * 1。

超详细的uln2803中文资料和使用实例ULN2803是一款常用的高耐压、高电流驱动芯片，常用于驱动继电器、步进电机、LED、数码管等外围设备。

本文将详细介绍ULN2803的特点、电气参数和使用实例，帮助读者更好地理解和应用该芯片。

一、ULN2803概述ULN2803是由Darlington对器构成的8位高边（NPN晶体管）驱动器，主要由输入端、输出端和电源端组成。

它的特点是具有较高的耐压和电流承受能力，能够有效地驱动各种外围设备。

二、ULN2803电气参数1.最大输入电压：5V2.最大输出电流：500mA3.工作温度范围：-20℃到+85℃4.引脚配置：ULN2803芯片共有18个引脚，其中8个为输入端(IN1~IN8)，8个为输出端(OUT1~OUT8)，另外两个引脚分别为COM 与GND。

三、使用实例下面将介绍两个基于ULN2803的使用实例，分别是使用ULN2803驱动继电器和LED。

1.使用ULN2803驱动继电器步骤一：连接电路将ULN2803的输入端(IN1~IN8)分别连接到微控制器的IO口，输出端(OUT1~OUT8)连接到继电器的驱动端，COM引脚连接到继电器的公共端，GND引脚连接到电源的地线。

步骤二：编写程序根据具体的微控制器型号和开发环境，编写程序来控制ULN2803的输入端。

通过将输入端设置为高电平或低电平，控制对应输出端的电平状态，从而控制继电器的开关。

步骤三：测试将继电器的公共端与继电器的常闭端连接，使得继电器处于断开状态。

通过控制输入端的电平状态，观察继电器是否能够正常动作。

若输入端为高电平，则继电器吸合，输出端的电平为低电平；若输入端为低电平，则继电器断开，输出端的电平为高电平。

2.使用ULN2803驱动LED步骤一：连接电路将ULN2803的输入端(IN1~IN8)分别连接到微控制器的IO口，输出端(OUT1~OUT8)连接到LED的阳极（长脚），LED的阴极（短脚）连接到电源的地线。

uln2003/uln2803精解- 高电压大电流达林顿阵列
uln2003/uln2803 - 高电压大电流达林顿阵列
ULN2003的内部结构和功能参见下图：
它的内部结构是达林顿的，专门用来驱动继电器的芯片，甚至在芯片内部做了一个消线圈反电动势的二极管。

ULN2003的输出端允许通过IC 电流200mA，饱和压降VCE 约1V左右，耐压BVCEO 约为36V。

用户输出口的外接负载可根据以上参数估算。

采用集电极开路输出，输出电流大，故可以直接驱动继电器或固体继电器(SSR)等外接控制器件，也可直接驱动低压灯泡。

经常在工控的板卡中见到这个芯片。

有个完全一样的型号：MC1413，不过现在好像不怎么见到这个型号了，但是管脚与2003完全兼容。

ULN2003可以驱动7个继电器；ULN2803驱动8个继电器。

常用的芯片是ULN2003，因为使用的量大，所以价格便宜，一片大概是1，2803需要2.5左右。

ULN2003管脚排列如下图所示：。

ULN2803A
新型八路高耐压、大电流达林顿晶体管描述
ULN2803A 是单片集成高耐压、大电流达林顿管阵
列，电路内部包含八个独立的达林顿管驱动单路。

电路内部设计有续流二极管，可用于驱动继电器、
步进电机等电感性负载。

单个达林顿管集电极可
输出500mA电流。

将达林顿管并联可实现更高的
输出电流能力。

该电路可广泛应用于继电器驱动、
照明驱动、显示屏驱动(LED)、步进电机驱动和逻
辑缓冲器。

ULN2803A的每一路达林顿管串联一个2.7K的基
极电阻，在5V的工作电压下可直接与TTL/CMOS
电路连接，可直接处理原先需要标准逻辑缓冲器
来处理的数据。

典型应用
1、继电器驱动；
2、指示灯驱动；
3、显示屏驱动。

特点
1、500mA集电极输出电流(单路)；
2、耐高压(40V)；
3、输入兼容TTL/CMOS逻辑信号；
4、广泛应用于继电器驱动；
5、静电能力：2000V（HBM）。

ULN2003、ULN2803资料汇总（输入TTL低，输出导通）ULN2803和ULN2003都是集电极开路输出，只能接受灌入电流，他们的使用方法是一致的，唯一的区别就是2803可以驱动8位管脚，2003只有7个管脚COM脚的作用是当你使用ULN2803(2003)来驱动继电器时，可以将COM脚接到继电器的VCC 端，利用ULN2803(2003)内部的反向二极管作保护继电器，消除继电器闭合时产生的感应电压。

COM端主要有两种用途：(可悬空)1 试验用----接地：假如它的输出端都接发光二极管，那么，只要将COM端接地，则所有的发光二极管都将亮起，否则，可能是二极管坏或其它什么地方坏了。

这对检修是很有利的。

2 保护用----接电源正：假如这个器件是接继电器或针式打印头，因为电感的作用，会在开关过程中产生低于地电位和高于电源电位的反电动势，这样，很容易击穿器件。

A-为了防止这种现象的发生，可将COM端接到电源正，来削减冲击电压低到二极管压降加电源电压的幅度----可以使得内部的三极管受到最小的正电压冲击。

B-至于达林顿关断时产生的负电压我们不必管，因为器件内部就有二极管并接到地的(见图2)----专门用来削减冲击电压至电源地减去一个二极管正向压降----可以使得内部的三极管受到最小的反偏电压冲击。

3 阅读提示：A-类似这样的保护方法，在许多器件(如AD7710)的输入端或输出端都是有的，请留意。

B-以上两种用法并不是矛盾的，通过适当的电路控制，可以一并利用它的功能。

它的内部结构也是达林顿的，专门用来驱动继电器的芯片，甚至在芯片内部做了一个消线圈反电动势的二极管。

ULN2003的输出端允许通过IC 电流200mA，饱和压降VCE 约1V左右，耐压BVCEO 约为36V。

用户输出口的外接负载可根据以上参数估算。

采用集电极开路输出，输出电流大，故可以直接驱动继电器或固体继电器(SSR)等外接控制器件，也可直接驱动低压灯泡。