Description
UDN2987x-6 DABIC-5 8-Channel Source Driver with Overcurrent Protection Package A, 20-pin DIP Package LW, 20-pin SOIC-W Approximate Scale 1:1 Providing overcurrent protection for each of its eight sourcing outputs, the UDN2987A-6 and UDN2987LW-6 drivers are used as an interface between standard low-level logic and relays, motors, solenoids, LEDs, and incandescent lamps. These devices include thermal shut down and output transient protection/clamp diodes for use with sustaining voltages to 35 V. In these drivers, each channel includes a latch to turn off that channel if the maximum channel current is exceeded. All channels are disabled if the thermal shutdown is activated. A common FAULT output is used to indicate either chip thermal shutdown or any overcurrent condition. All outputs are enabled ¯ by pulling the common OE/R input high. When OE/R is low, all outputs are inhibited and the eight latches are reset. The www.DataSheet4U.com ¯ OE/R function can be especially important during power-up, in preventing floating inputs from turning on the outputs. Under normal operating conditions, each of eight outputs will source in excess of 100 mA continuously at an ambient temperature of 25°C and a supply of 35 V. The over-current fault circuit will protect the device from short-circuits to ground with supply voltages of up to 30 V. The inputs are compatible with 5 and 12 V logic systems: TTL, Schottky TTL, DTL, PMOS, and CMOS. In all cases, the output is switched ON by an active high input level. Compared to their predecessor devices, the UDN2987A and UDN2987LW, the UDN2987A-6 and UDN2987LW-6 have a significantly faster TPHL (200 ns typical) and a lower driver supply voltage rating (4.75 V), which allows the use of 5 V logic. The UDN2987A-6 is supplied in a 20-pin dual in-line plastic (DIP) package; the UDN2987LW-6 is supplied in a 20-lead small-outline (SOIC-W) plastic package. The Pb (lead) free versions have 100% matte-tin leadframe plating. Features 4.75 to 35 V driver supply voltage Output enable-disable (OE/R) 350 mA output source current Overcurrent protected Internal ground clamp diodes Output Breakdown Voltage 35 V minimum TTL, DTL, PMOS, or CMOS compatible inputs Internal Thermal Shut Down (TSD) Applications Relays Motors Solenoids LEDs Incandescent lamps Typical Application IN1 IN2 IN3 IN4 CPU IN5 IN6 IN7 IN8 FAULT ¯ OE/R OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 GND VS 4.75 to 35 V 2987 1 to 8 Load Components 29876DS UDN2987x-6 DABIC-5 8-Channel Source Driver with Overcurrent Protection Selection Guide Part Number UDN2987A-6-T UDN2987LW-6-T UDN2987LWTR-6-T Pb-free* Yes Yes Yes Packing 18 pieces/tube 37 pieces/tube 1000 pieces/13-in. reel Package 20-pin DIP 20-pin SOIC, wide body *Pb-based variants are being phased out of the product line. The variants cited in this footnote are in production but have been determined to be LAST TIME BUY. This classification indicates that sale of this device is currently restricted to existing customer applications. The variants should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Status change: October 31, 2006. Deadline for receipt fo LAST TIME BUY orders: April 27, 2007. These variants include: UDN2987A-6, UDN2987LW-6, and UDN2987LWTR-6. Absolute Maximum Ratings Parameter Supply Voltage Continuous Output Current* FAULT Output Voltage FAULT Output Current Input Voltage Junction Temperature Storage Temperature Range Operating Temperature Range Symbol VS IOUT VCE IC VIN TJ TS TA Outputs are disabled at approximately –500 mA Conditions Min. – –500 – – –0.3 – –55 –20 Max. Units 35 – 35 30 14 150 150 85 V mA V mA V °C °C °C *For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin. 29876DS, Rev. 1pb Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 2 UDN2987x-6 DABIC-5 8-Channel Source Driver with Overcurrent Protection Functional Block Diagram VS Thermal Shut Down ¯ OE/R FAULT R Q S IN1 OUT1 Driver 1 of 8 drivers IN8 OUT8 GND Pin-Out Diagram IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8 FAULT OE/R 1 2 3 4 5 6 7 8 9 10 x8 OE OEN FF 20 19 18 17 16 15 14 13 12 SENSE N OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 GND VS 11 Dwg. PP-067 Package A (DIP) shown. Package LW (SOIC-W) is electrically identical and has the same terminal number assignment. 29876DS + – Terminal List Table Number Name 1 IN1 2 IN2 3 IN3 4 IN4 5 IN5 6 IN6 7 IN7 8 IN8 9 FAULT 10 OE/ ¯ R ¯ 11 VS 12 GND 13 OUT8 14 OUT7 15 OUT6 16 OUT5 17 OUT4 18 OUT3 19 OUT2 20 OUT1 Description Logic input 1 Logic input 2 Logic input 3 Logic input 4 Logic input 5 Logic input 6 Logic input 7 Logic input 8 Fault output Logic input for Output Enable and Reset Supply voltage Supply ground Output 8 to load Output 7 to load Output 6 to load Output 5 to load Output 4 to load Output 3 to load Output 2 to load Output 1 to load Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 3 UDN2987x-6 DABIC-5 8-Channel Source Driver with Overcurrent Protection ELECTRICAL CHARACTERISTICS, valid at TA = 25°C, VOER = 2.4 V, VS = 35 V, unless otherwise noted Characteristic Supply Voltage Functional Range Output Leakage Current2 Output Sustaining Voltage Output Saturation Voltage Channel Shut Down Threshold2 Symbol VS IOUTCEX VOUT(sus) VOUT(SAT) IM ICEX VCE(SAT) VIN(ON) VIN(OFF) VIN = 2.4 V ¯ Input Current: INx, OE/R pins IIN(ON) IIN(OFF) Clamp Diode Leakage Current Clamp Diode Forward Voltage Supply Current Thermal Shut Down Thermal Hysteresis Reset Pulse Duration Propagation Delay Time Blank Time 1Typical Test Conditions VIN = 0.4 V, all inputs simultaneously IOUT = –350 mA, L = 2.0 mH VIN = 2.4 V, IOUT = –100 mA VIN = 2.4 V, IOUT = –225 mA VIN = 2.4 V, IOUT = –350 mA VIN = 2.4 V, Vs = 30 V VCC = 35 V IC = 30 mA Min. 4.75 –200 35 — — — – — — 2.4 — — — — — — — — — — — 1.0 Typ.1 — <–5.0 — 1.6 1.7 1.8 –500 <1.0 0.3 — — — — — — — 1.5 7.0 6.0 165 15 — 100 200 1.0 Max. 35 – — 1.8 1.9 2.0 –370 100 0.8 — 0.4 100 600 1000 15 50 1.8 18 12 — — — 600 1000 — Units V μA V V V V mA μA V V V μA μA μA μA μA V mA mA °C °C μs ns ns μs FAULT Leakage Current FAULT Saturation Voltage Input Voltage VIN = 5.0 V VIN = 12 V VIN = 0.4 V VR = 35 V, TA = 70°C IF = 350 mA VIN = 2.4 V, all inputs simultaneously; outputs open VIN = 0.4 V, all inputs simultaneously IR VF IS(ON) IS(OFF) TJTSD TJTSDhys tRPD tPLH tPHL tBLANK VS = 35 V, RL = 100 Ω, CLOAD = 30 pF VS = 35 V, RL = 100 Ω, CLOAD = 30 pF — — — data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for individual units, within the specified maximum and minimum limits. 2For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin. 29876DS Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 4 UDN2987x-6 DABIC-5 8-Channel Source Driver with Overcurrent Protection THERMAL CHARACTERISTICS Characteristics Package Thermal Resistance* *Additional Symbol RθJA Test Conditions Package A, on 4-layer board based on JEDEC standard Package LW, on 4-layer board based on JEDEC standard Rating 32 48 Unit °C/W °C/W thermal information is available on the Allegro Web site. Power Dissipation versus Ambient Temperature 4.0 3.5 3.0 ck Pa (R / A e ºC ag 32 = 2.5 JA PD (W) Pa (R cka 2.0 1.5 1.0 0.5 0 JA g = e LW 48 ºC /W W ) ) 25 50 75 TA (°C) 100 125 150 29876DS Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 5 UDN2987x-6 DABIC-5 8-Channel Source Driver with Overcurrent Protection Characteristic Performance Output Current Waveshapes VIN(A) = VIN(B) OE/R ISH IOUT(A) IM IOUT(B) Momentary fault or capacitive charging (<1μs) — tPLH Output (A) shorted tRTB tPHL tBLANK Allowable Output Current as a Function of Duty Cycle (UDN2987A-6 shown, multiply by 78% for UDN2987LW-6) TA= 25°C, VS = 35 V 400 350 Quantity of outputs conducting simultaneously 8 7 6 5 4 3 400 350 TA= 50°C, VS = 35 V Quantity of outputs conducting simultaneously 8 7 6 5 4 3 2 Collector Current (mA) 300 250 200 150 100 50 0 Collector Current (mA) 0 10 20 30 40 50 60 70 80 90 100 300 250 200 150 100 50 0 0 10 20 30 40 50 60 70 80 90 100 Duty Cycle (%) Duty Cycle (%) 29876DS Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 6 UDN2987x-6 DABIC-5 8-Channel Source Driver with Overcurrent Protection Applications Information and Circuit Description As with all power integrated circuits, the UDN2987A-6 and UDN2987LW-6 have a maximum allowable output current rating. The 500 mA rating does not imply that operation at that value is permitted or even obtainable. The channel output current trip point is specified as –370 mA, minimum; therefore, attempted operation at current levels greater than –370 mA may cause a fault indication and channel shut down. The device is tested at a maximum of –350 mA and that is the recommended maximum output current per driver. It provides protection for current overloads or shorted loads up to 30 V. ¯ All outputs are enabled by pulling the OE/R input high. ¯ When OE/R is low or allowed to float (internal pull-down), all outputs are inhibited and the latches are reset. Note that ¯ the reset pulse duration (OE/R low) should be at least 1 μs. This will ensure safe operation under attempted reset conditions with a shorted load. The latches ar

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