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1、Support & CommunityProduct FolderOrder NowTechnical DocumentsTools & SoftwareULN2803ASLRS049H FEBRUARY 1997 REVISED FEBRUARY 2017ULN2803A Darlington Transistor Arrays1Features500-mA-Rated Collector Current (Single Output)High-Voltage Outputs: 50 V Output Clamp DiodesInputs Compatible With Various Ty

2、pes of Logic3 DescriptionThe ULN2803A device is a 50 V, 500 mA Darlington transistor array. The device consists of eight NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of each Darlington pair is 500

3、mA. The Darlington pairs may be connected in parallel for higher current capability.Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. The ULN2803A device has a 2.7-k series base resistor for each Darlington pai

4、r for operation directly with TTL or 5-V CMOS devices.2Applications Relay Drivers Hammer Drivers Lamp DriversDisplay Drivers (LED and Gas Discharge) Line DriversLogic Buffers Stepper Motors IP CameraHVAC Valve and LED Dot MatrixDevice Information(1)(1) For all available packages, see the orderable a

5、ddendum at the end of the data sheet.Logic Diagram1181B1C2172B2C3163B3C4154B4C5145B5C6136B6C7127B7C8118B8CCOM10An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaime

6、rs. PRODUCTION DATA.PART NUMBERPACKAGEBODY SIZE (NOM)ULN2803ADWSOIC (18)11.55 mm 7.50 mmULN2803ASLRS049H FEBRUARY 1997 REVISED FEBRUARY 2017Table of Contents123456Features1Applications1Description1Revision History2Pin Configuration and Functions3Specifications48.3 Feature Description98.4 D

7、evice Functional Modes9Application and Implementation109.1 Application Information109.2 Typical Application10Power Supply Recommendations12Layout1211.1 Layout Guidelines1211.2 Layout Example12Device and Documentation Support139106.7Absolute Maximum Ratings4ESD Ratings4Recommended

8、 Operating Conditions4Thermal Information4Electrical Characteristics5Switching Characteristics5Typical Characteristics5112.412.5Receiving Notification of Documentation Updates 13 Community Resources13Trademarks13Electrostatic Discharge Caution13Glossary1378Parameter Measurement Informat

9、ion6Detailed Description98.1 Overview98.2 Functional Block Diagram913Mechanical, Packaging, and Orderable Information134Revision HistoryNOTE: Page numbers for previous revisions may differ from page numbers in the current version.Changes from Revision G (January 2015) to Revision HPageDeleted obsole

10、te orderable ULN2803AN and removed all references to N package1Added Storage temperature, Tstg in Absolute Maximum Ratings4Deleted VI from Recommended Operating Conditions4Added Ambient temperature, TA in Recommended Operating Conditions4Changed coil supply voltage specifications in Design Parameter

11、s11Added Receiving Notification of Documentation Updates section and Community Resources section13Changes from Revision F (January 2014) to Revision GPage Added Applications, Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table, Typical Characteristics, Feature

12、 Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, andMechanical, Packaging, and Orderable Information section.1Changes from Revision E (July 2006) to Revision FPageUpd

13、ated document to new TI data sheet format - no specification changes.1Deleted Ordering Information table12Submit Documentation FeedbackCopyright 19972017, Texas Instruments IncorporatedProduct Folder Links: ULN2803AULN2803ASLRS049H FEBRUARY 1997 REVISED FEBRUARY 20175Pin Configuration and

14、FunctionsDW Package 18-Pin SOICTop View1B1181C2B2172C3B3163C4B4154C5B5145C6B6136C7B7127C8B8118CGND910COMNot to scalePin FunctionsSubmit Documentation Feedback3Copyright 19972017, Texas Instruments IncorporatedProduct Folder Links: ULN2803APINTYPEDESCRIPTIONNAMENO.1B1IChannel 1 through 8 Darlington b

15、ase input2B23B34B45B56B67B78B81C18OChannel 1 through 8 Darlington collector output2C173C164C155C146C137C128C11GND9Common emitter shared by all channels (typically tied to ground)COM10I/OCommon cathode node for flyback diodes (required for inductive loads)ULN2803ASLRS049H FEBRUARY 1997 REVISED FEBRUA

16、RY 20176 Specifications6.1 Absolute Maximum Ratingsat 25C free-air temperature (unless otherwise noted)(1)(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the

17、device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.(2) All voltage values, unless otherwise noted, are with respect to the emitter/substrate terminal G

18、ND.6.2 ESD Ratings(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.6.3 Recommended Operating Conditionsover operating free-air te

19、mperature range (unless otherwise noted)6.4 Thermal Information(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.4Submit Documentation FeedbackCopyright 19972017, Texas Instruments IncorporatedProduct Folder Li

20、nks: ULN2803ATHERMAL METRIC(1)ULN2803AUNITDW (SOIC)18 PINSRJAJunction-to-ambient thermal resistance66.4C/WRJC(top)Junction-to-case (top) thermal resistance29.5C/WRJBJunction-to-board thermal resistance33.0C/WJTJunction-to-top characterization parameter6.0C/WJBJunction-to-board characterization param

21、eter32.5C/WRJC(bot)Junction-to-case (bottom) thermal resistanceN/AC/WMINMAXUNITVCECollector-emitter voltage050VTAAmbient temperature4085CVALUEUNITV(ESD)Electrostatic dischargeHuman body model (HBM), per ANSI/ESDA/JEDEC JS-001(1)2000VCharged device model (CDM), per JEDEC specification JESD22-C101(2)5

22、00MINMAXUNITVCECollector-emitter voltage50VVIInput voltage(2)30VPeak collector current500mAI(clamp)Output clamp current500mATotal substrate-terminal current2.5ATJJunction temperature65150CTstgStorage temperature65150CULN2803ASLRS049H FEBRUARY 1997 REVISED FEBRUARY 20176.5 Electrical Charac

23、teristicsat TA = 25C free-air temperature (unless otherwise noted)6.6 Switching CharacteristicsTA = 25C6.7Typical CharacteristicsFigure 1. Collector-Emitter Saturation Voltage vs Collector Current (One Darlington)Figure 2. Collector-Emitter Saturation Voltage vs Total Collector Current (Two Darlingt

24、ons in Parallel)Submit Documentation Feedback5Copyright 19972017, Texas Instruments IncorporatedProduct Folder Links: ULN2803APARAMETERTEST CONDITIONSMINTYPMAXUNITtPLHPropagation delay time, low- to high-level outputVS = 50 V, CL = 15 pF, RL = 163 ,See Figure 10130nstPHLPropagation delay time, high-

25、 to low-level output20VOHHigh-level output voltage after switchingVS = 50 V, IO = 300 mA, see Figure 11VS 20mVPARAMETERTEST CONDITIONSULN2803AUNITMINTYPMAXICEXCollector cutoff currentVCE = 50 V,II = 0see Figure 350AII(off)Off-state input currentVCE = 50 V,IC = 500 A,TA = 70Csee Figure 45065AII(on)In

26、put currentVI = 3.85 V,See Figure 50.931.35mAVI(on)On-state input voltageVCE = 2 V,see Figure 6IC = 200 mA2.4VIC = 250 mA2.7IC = 300 mA3VCE(sat)Collector-emitter saturation voltageII = 250 A,see Figure 7IC = 100 mA0.91.1VII = 350 A,see Figure 7IC = 200 mA11.3II = 500 A,see Figure 7IC = 350 mA1.31.6I

27、RClamp diode reverse currentVR = 50 V,see Figure 850AVFClamp diode forward voltageIF = 350 mAsee Figure 91.72VCiInput capacitanceVI = 0,f = 1 MHz1525pFULN2803ASLRS049H FEBRUARY 1997 REVISED FEBRUARY 20177Parameter Measurement InformationVCEOpenVCEOpenICII(off)ICEXOpenFigure 3. ICEX Test Ci

28、rcuitOpenFigure 4. II(off) Test CircuitOpenICOpenVIVIVCEFigure 5. II(on) Test CircuitOpenFigure 6. VI(on) Test CircuitVR= IC IIhFEIRIIICOpenVCEFigure 7. hFE, VCE(sat) Test CircuitFigure 8. IR Test CircuitIFVFOpenFigure 9. VF Test Circuit6Submit Documentation FeedbackCopyright 19972017, Texas Instrum

29、ents IncorporatedProduct Folder Links: ULN2803AIIULN2803ASLRS049H FEBRUARY 1997 REVISED FEBRUARY 2017Parameter Measurement Information (continued)InputOpenVS = 50 VRL = 163 Pulse Generator (see Note A)OutputCL = 15 pF(see Note B)Test Circuit5 ns10 nsVIH(see Note C)090%50%90%50%Input 10% 10

30、%0.5 stPHLtPLH VOH50%50%OutputVoltage WaveformsThe pulse generator has the following characteristics: PRR = 12.5 kHz, ZO = 50 . CL includes probe and jig capacitance.VIH = 3 VA.B.C.Figure 10.Propagation Delay TimesSubmit Documentation Feedback7Copyright 19972017, Texas Instruments IncorporatedProduc

31、t Folder Links: ULN2803AULN2803ASLRS049H FEBRUARY 1997 REVISED FEBRUARY 2017Parameter Measurement Information (continued)VSInput2 mH163 OutputCL = 15 pF(see Note B)Test Circuit5 ns10 nsVIH(see Note C)090%1.5 V90%1.5 VInput 1%10%40 sVOHOutputVoltage WaveformsThe pulse generator has the foll

32、owing characteristics: PRR = 12.5 kHz, ZO = 50 . CL includes probe and jig capacitance.VIH = 3 VFigure 11. Latch-Up TestA.B.C.8Submit Documentation FeedbackCopyright 19972017, Texas Instruments IncorporatedProduct Folder Links: ULN2803APulse Generator (see Note A)ULN2803ASLRS049H FEBRUARY 1997 REVIS

33、ED FEBRUARY 20178Detailed Description8.1 OverviewThis standard device has proven ubiquity and versatility across a wide range of applications. This is due to its integration of 8 Darlington transistors that are capable of sinking up to 500 mA and wide GPIO range capability.The ULN2803A is

34、comprised of eight high voltage, high current NPN Darlington transistor pairs. All units feature a common emitter and open collector outputs. To maximize their effectiveness, these units contain suppression diodes for inductive loads. The ULN2803A has a series base resistor to each Darlington pair,

35、thus allowing operation directly with TTL or CMOS operating at supply voltages of 5 V or 3.3 V. The ULN2803A offers solutions to a great many interface needs, including solenoids, relays, lamps, small motors, and LEDs. Applications requiring sink currents beyond the capability of a single output may

36、 be accommodated by paralleling the outputs.8.2 Functional Block DiagramCOMOutput C2.7 kInput B2 kE8.3 Feature DescriptionEach channel of ULN2803A consists of Darlington connected NPN transistors. This connection creates the effect of a single transistor with a very-high current gain. The very high

37、allows for high output current drive with a very- low input current, essentially equating to operation with low GPIO voltages.The GPIO voltage is converted to base current through the 2.7-k resistor connected between the input and base of the predriver Darlington NPN.The diodes connected between the

38、 output and COM pin are used to suppress the kick-back voltage from an inductive load that is excited when the NPN drivers are turned off (stop sinking) and the stored energy in the coils causes a reverse current to flow into the coil supply through the kick-back diode.In normal operation, the diode

39、s on base and collector pins to emitter will be reverse biased. If these diode are forward biased, internal parasitic NPN transistors will draw (a nearly equal) current from other (nearby) device pins.8.4 Device Functional Modes8.4.1 Inductive Load DriveWhen the COM pin is tied to the coil supply vo

40、ltage, ULN2803A is able to drive inductive loads and suppress the kick-back voltage through the internal free wheeling diodes.8.4.2 Resistive Load DriveWhen driving resistive loads, COM can be left unconnected or connected to the load voltage supply. If multiple supplies are used, connect to the hig

41、hest voltage supply.Submit Documentation Feedback9Copyright 19972017, Texas Instruments IncorporatedProduct Folder Links: ULN2803A7.3 kULN2803ASLRS049H FEBRUARY 1997 REVISED FEBRUARY 20179Application and ImplementationNOTEInformation in the following applications sections is not part of th

42、e TI component specification, and TI does not warrant its accuracy or completeness. TIs customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.9.1 Application InformationUL

43、N2803A will typically be used to drive a high voltage and/or current peripheral from an MCU or logic device that cannot tolerate these conditions. The following design is a common application of ULN2803A, driving inductive loads. This includes motors, solenoids, and relays. Each load type can be mod

44、eled by what is seen in Figure 12.9.2Typical ApplicationVSUP3.3 V Logic3.3 V Logic3.3 V LogicVSUPCopyright 2017, Texas Instruments IncorporatedFigure 12.ULN2803A as Inductive Load Driver10Submit Documentation FeedbackCopyright 19972017, Texas Instruments IncorporatedProduct Folder Links: ULN2803AULN

45、2803AIN1OUT1IN2OUT2IN3OUT3IN4OUT4IN5OUT5IN6OUT6IN7OUT7IN8OUT8GNDCOMULN2803ASLRS049H FEBRUARY 1997 REVISED FEBRUARY 2017Typical Application (continued)9.2.1 Design RequirementsFor this design example, use the parameters listed in Table 1 as the input parameters.Table 1. Design Parameters9.2

46、.2 Detailed Design ProcedureWhen using ULN2803A in a coil driving application, determine the following:Input voltage range Temperature range Output and drive current Power dissipation Drive CurrentThe coil current is determined by the coil voltage (VSUP), coil resistance, VCE(SAT).ICOIL = (VS

47、UP VCE(SAT) / RCOIL Output Low Voltageand outputlow voltage (VOL or(1)The output low voltage (VOL) is the same thing asElectrical Characteristics.VCE(SAT)and can be determined by Figure 1, Figure 2, or Power Dissipation and TemperatureThe number of coils driven is dependent on the coil

48、 current and on-chip power dissipation. To determine the number of coils possible, use Equation 2 to calculate ULN2803A on-chip power dissipation PD.N= ?VOLi ?ILiPDi=1where N is the number of channels active together. VOLi is the OUTi pin voltage for the load current ILi. This is the same as VCE(SAT

49、)(2)To ensure the reliability of ULN2803A and the system, the on-chip power dissipation must be lower that or equal to the maximum allowable power dissipation (PD) dictated by Equation 3.= (TJ(MAX) - TA )PDqJA(MAX)whereTJ(MAX) is the target maximum junction temperature. TA is the operating ambient t

50、emperature.JA is the package junction to ambient thermal resistance.(3)TI recommends to limit ULN2803A ICs die junction temperature to 125C. The IC junction temperature is directly proportional to the on-chip power dissipation.Submit Documentation Feedback11Copyright 19972017, Texas Instruments IncorporatedProduct Folder Links: ULN2803ADESIGN PARAMETEREXAMPLE VALUEGPIO voltage3.3 or 5 VCoil supply voltage12 to 50 VNumber of channels8Output current (RCOIL)20 to 300 mA