Data Sheet 29305.10B‡ 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES These quad Darlington arrays are designed to serve as interface between low-level logic and peripheral power devices such as solenoids, motors, incandescent displays, heaters, and similar loads of up to 320 W per channel. Both integrated circuits include transient-suppression diodes that enable use with inductive loads. The input logic is compatible with most TTL, DTL, LSTTL, and 5 V CMOS logic. Type UDN2878W and UDN2879W 4 A arrays are identical except for output-voltage ratings. The former is rated for operation to 50 V (35 V sustaining), while the latter has a minimum output breakdown rating of 80 V (50 V sustaining). The lower-cost UDN2879W-2 is recommended for applications requiring load currents of 3 A or less. These less expensive devices are identical to the basic parts except for the maximum allowable load-current rating. t c u d o ly r P On d e e c u it n ren n e f o e c s rR i D o F For maximum power-handling capability, all drivers are supplied in a 12-pin single in-line power-tab package. The tab needs no insulation. External heat sinks are usually required for proper operation of these devices. Dwg. No. A-11,974 FEATURES ■ Output Currents to 4 A ABSOLUTE MAXIMUM RATINGS at +25°C Free-Air Temperature for any driver (unless otherwise noted) Output Voltage, VCEX (UDN2878W) . . . . . . . . . . . . . . . . 50 V (UDN2879W & UDN2879W-2) . . 80 V Output Current, lC (UDN2878W & UDN2879W) . . . 5.0 A (UDN2879W-2) . . . . . . . . . . . . . 4.0 A Input Voltage, VIN . . . . . . . . . . . . . . . . 15 V Input Current, IIN . . . . . . . . . . . . . . . 25 mA Supply Voltage, VS . . . . . . . . . . . . . . . 10 V Total Package Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . See Graph Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . -20°C to +85°C Storage Temperature Range, TS . . . . . . . . . . . . . . . -55°C to +150°C ■ Output Voltages to 80 V ■ Loads to 1280 W ■ TTL, DTL, or CMOS Compatible Inputs ■ Internal Clamp Diodes ■ Plastic Single In-Line Package ■ Heat-Sink Tab Always order by complete part number: Part Number Max. IC Max. VCEX Min. VCE (sus) UDN2878W 5.0 A 50 V 35 V UDN2879W 5.0 A 80 V 50 V UDN2879W-2 4.0 A 80 V 50 V 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS 10 RθJT = 2.0°C/W 8 3.0°C/W HEAT SINK RθJA = 5.0°C/W 6 12°C/W HEAT SINK RθJA = 14°C/W 4 2 FREE AIR, R θJA = 38°C/W 0 25 50 75 100 TEMPERATURE IN °C 125 150 Dwg. GP-012B PARTIAL SCHEMATIC One of 4 Drivers Dwg. No. A-12,037 NOTE: Pin 3 must be connected to ground for proper operation. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1983, 2002 Allegro MicroSystems, Inc. 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES ELECTRICAL CHARACTERISTICS at VS = 5.0 V, TA = +25°C (unless otherwise noted). Characteristic Output Leakage Current Test Applicable Symbol Fig. Devices ICEX 1 UDN2878W Min. Max. Units VCE = 50 V — 100 µA VCE = 50 V, TA = +70°C — 500 µA VCE = 80 V — 100 µA VCE = 80 V, TA = +70°C — 500 µA UDN2878W lC = 4 A, L = 10 mH 35 — V UDN2879W lC = 4 A, L = 10 mH 50 — V UDN2879W-2 lC = 3 A, L = 10 mH 50 — V lC = 500 mA, VIN = 2.75 V — 1.1 V lC = 1.0 A, VIN = 2.75 V — 1.3 V lC = 2.0 A, VIN = 2.75 V — 1.5 V lC = 3.0 A, VIN = 2.75 V — 1.9 V lC = 4.0 A, VIN = 3.0 V — 2.4 V VIN = 2.75 V — 550 µA VIN = 3.75 V — 1000 µA All VCE = 2.2 V, lC = 3.0 A — 2.75 V UDN2878/79W VCE = 2.2 V, lC = 4.0 A — 2.75 V UDN2879W/W-2 Output Sustaining Voltage Collector-Emitter Saturation Voltage VCE(sus) VCE(SAT) — 2 All UDN2878/79W Input Current Input Voltage Supply Current per Driver IIN VIN(ON) 3 4 Limits All Test Conditions IS 7 All lC = 500 mA, VIN = 2.75 V — 6.0 mA Turn-On Delay tPLH — All 0.5 Ein to 0.5 Eout — 1.0 µs Turn-Off Delay tPHL — All 0.5 Ein to 0.5 Eout, lC = 3.0 A — 1.5 µs IR 5 All VR = 50 V — 50 µA VR = 50 V, TA = +70°C — 100 µA VR = 80 V — 50 µA VR = 80 V, TA = +70°C — 100 µA All IF = 3.0 A — 2.5 V UDN2878/79W IF = 4.0 A — 3.0 V Clamp Diode Leakage Current UDN2879W/W-2 Clamp Diode Forward Voltage VF 6 Caution: High-current tests are pulse tests or require heat sinking. www.allegromicro.com 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES TEST FIGURES VCE OPEN OPEN OPEN µA IIN ICEX OPEN VIN mA IC V OPEN VIN VCE Dwg. No. A-9729A Dwg. No. A-10,350 FIGURE 1 Dwg. No. A-9732 FIGURE 2 FIGURE 3 VR OPEN IF µA V IR VIN VF OPEN OPEN V V VCE IC Dwg. No. A-9736 Dwg. No. A-9735A Dwg. No. A-9734A FIGURE 5 FIGURE 4 VS IS FIGURE 6 OPEN mA IC VIN Dwg. No. A-10,351 FIGURE 7 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES TYPICAL APPLICATIONS INPUT WAVEFORMS STEPPER-MOTOR DRIVER Dwg. No. A-11,795 DIGIT DRIVER FOR MULTIPLEXED INCANDESCENT LAMP DISPLAY Dwg. No. A-11,975 PRINT-HAMMER DRIVER Dwg. No. A-11,976 Dwg. No. B-1512 www.allegromicro.com 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES Dimensions in Inches (controlling dimensions) 0.180 1.260 1.240 0.020 MAX 0.775 0.765 0.245 0.225 0.055 0.045 0.155 ø 0.145 0.140 0.365 INDEX AREA 0.065 0.035 0.570 0.540 0.135 0.100 0.290 MIN 1 0.030 0.020 12 0.100 0.023 0.018 ±0.010 0.080 0.070 Dwg. MP-007 in NOTES: 1. 2. 3. 4. 5. Lead thickness is measured at seating plane or below. Lead spacing tolerance is non-cumulative. Exact body and lead configuration at vendor’s option within limits shown. Lead gauge plane is 0.030” below seating plane. Supplied in standard sticks/tubes of 15 devices. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES Dimensions in Millimeters (for reference only) 32.00 31.49 0.51 4.57 MAX 19.69 19.45 6.22 5.71 1.40 1.14 3.94 ø 3.68 3.56 9.27 INDEX AREA 1.65 0.89 14.48 13.71 3.43 2.54 7.36 MIN 1 0.76 0.51 12 2.54 0.59 0.45 ±0.254 2.03 1.77 Dwg. MP-007 mm NOTES: 1. 2. 3. 4. 5. Lead thickness is measured at seating plane or below. Lead spacing tolerance is non-cumulative. Exact body and lead configuration at vendor’s option within limits shown. Lead gauge plane is 0.762 mm below seating plane. Supplied in standard sticks/tubes of 15 devices. The 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, or manufacturability 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 responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. www.allegromicro.com 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES POWER SINK DRIVERS IN ORDER OF 1) OUTPUT CURRENT, 2) OUTPUT VOLTAGE, 3) NUMBER OF DRIVERS Output Ratings * mA V # Serial Input Latched Drivers Features Diode Clamp Outputs Internal Protection 75 Part Number † 17 8 X X – constant current – 6275 17 16 X X – constant current – 6276 100 20 8 – – – saturated – 2595 30 32 X X – – – 5833 40 32 X X – saturated – 5832 50 8 addressable decoder/driver DMOS – 6B259 50 8 – X – DMOS – 6B273 50 8 X X – DMOS – 6B595 120 24 8 X X – constant current – 6277 250 50 8 addressable decoder/driver DMOS – 6259 50 8 – X – DMOS – 6273 50 8 X X – DMOS – 6595 50 8 – – X saturated – 2596 60 4 – – X saturated X 2557 350 50 4 – X X – – 5800 50 7 – – X – – 2003 50 7 – – X – – 2004 50 8 – – X – – 2803 50 8 – X X – – 5801 50 8 X X – – – 5821 50 8 X X X – – 5841 50 8 addressable decoder/driver DMOS – 6A259 50 8 X X – DMOS – 6A595 80 8 X X – – – 5822 80 8 X X X – – 5842 95 7 – – X – – 2023 95 7 – – X – – 2024 450 30 28 dual 4- to 14-line decoder/driver – – 6817 600 60 4 – – – saturated X 2547 60 4 – – X saturated X 2549 and 2559 700 60 4 – – X saturated X 2543 750 50 8 – – X saturated – 2597 1000 46 4 stepper motor controller/driver MOS – 7024 and 7029 1200 46 4 microstepping controller/driver MOS – 7042 1250 50 4 stepper motor translator/driver – X 5804 1800 50 4 – – X – – 2540 3000 46 4 stepper motor controller/driver MOS – 7026 46 4 microstepping controller/driver MOS – 7044 * Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or over-current protection voltage limits. † Complete part number includes additional characters to indicate operating temperature range and package style. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000