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| 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. 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 Data Sheet 29305.10B FEATURES I Output Currents to 4 A I Output Voltages to 80 V I Loads to 1280 W I TTL, DTL, or CMOS Compatible Inputs I Internal Clamp Diodes I Plastic Single In-Line Package I Heat-Sink Tab ABSOLUTE MAXIMUM RATINGS at +25C 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 . . . . . . . . . . . . . . . . -20C to +85C Storage Temperature Range, TS . . . . . . . . . . . . . . . -55C to +150C Always order by complete part number: Part Number UDN2878W UDN2879W UDN2879W-2 Max. IC 5.0 A 5.0 A 4.0 A Max. VCEX 50 V 80 V 80 V Min. VCE (sus) 35 V 50 V 50 V 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES 10 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS RJT = 2.0C/W 8 3.0C/W HEAT SINK RJA = 5.0C/W 6 12C/W HEAT SINK RJA = 14C/W 4 2 FREE AIR, R JA = 38C/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 (c) 1983, 2000 Allegro MicroSystems, Inc. 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES ELECTRICAL CHARACTERISTICS at VS = 5.0 V, TA = +25C (unless otherwise noted). Test Characteristic Output Leakage Current Symbol ICEX Fig. 1 Applicable Devices UDN2878W Test Conditions VCE = 50 V VCE = 50 V, TA = +70C UDN2879W/W-2 VCE = 80 V VCE = 80 V, TA = +70C Output Sustaining Voltage VCE(sus) -- UDN2878W UDN2879W UDN2879W-2 Collector-Emitter Saturation Voltage VCE(SAT) 2 All lC = 4 A, L = 10 mH lC = 4 A, L = 10 mH lC = 3 A, L = 10 mH lC = 500 mA, VIN = 2.75 V lC = 1.0 A, VIN = 2.75 V lC = 2.0 A, VIN = 2.75 V lC = 3.0 A, VIN = 2.75 V UDN2878/79W Input Current IIN 3 All lC = 4.0 A, VIN = 3.0 V VIN = 2.75 V VIN = 3.75 V Input Voltage VIN(ON) 4 All UDN2878/79W Supply Current per Driver Turn-On Delay Turn-Off Delay Clamp Diode Leakage Current IS tPLH tPHL IR 7 -- -- 5 All All All All VCE = 2.2 V, lC = 3.0 A VCE = 2.2 V, lC = 4.0 A lC = 500 mA, VIN = 2.75 V 0.5 Ein to 0.5 Eout 0.5 Ein to 0.5 Eout, lC = 3.0 A VR = 50 V VR = 50 V, TA = +70C UDN2879W/W-2 VR = 80 V VR = 80 V, TA = +70C Clamp Diode Forward Voltage VF 6 All UDN2878/79W IF = 3.0 A IF = 4.0 A Min. -- -- -- -- 35 50 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Limits Max. 100 500 100 500 -- -- -- 1.1 1.3 1.5 1.9 2.4 550 1000 2.75 2.75 6.0 1.0 1.5 50 100 50 100 2.5 3.0 Units A A A A V V V V V V V V A A V V mA s s A A A A V V Caution: High-current tests are pulse tests or require heat sinking. www.allegromicro.com 2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES TEST FIGURES OPEN VCE OPEN OPEN A OPEN ICEX IIN VIN V VCE mA OPEN IC VIN Dwg. No. A-9729A Dwg. No. A-10,350 Dwg. No. A-9732 FIGURE 1 FIGURE 2 FIGURE 3 OPEN VR A IR V OPEN VF IF VIN V VCE V IC OPEN Dwg. No. A-9734A Dwg. No. A-9735A Dwg. No. A-9736 FIGURE 4 FIGURE 5 FIGURE 6 VS OPEN IS mA VIN IC 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) 1.260 1.240 0.020 0.775 0.765 0.245 0.225 0.180 MAX 0.055 0.045 0.155 o 0.145 0.135 0.100 0.140 0.365 0.570 0.540 INDEX AREA 0.290 MIN 1 0.065 0.035 0.030 0.020 12 0.100 0.010 0.023 0.018 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 19.69 19.45 6.22 5.71 4.57 MAX 1.40 1.14 3.94 o 3.68 3.43 2.54 3.56 9.27 14.48 13.71 INDEX AREA 7.36 MIN 1 1.65 0.89 0.76 0.51 12 2.54 0.254 0.59 0.45 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 75 V # Serial Input Latched Drivers Features Diode Clamp Outputs Internal Protection 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 250 50 8 addressable decoder/driver DMOS - 6259 50 8 - X - DMOS - 6273 50 8 X X - DMOS - 6595 135 7 - - X - - 7003 300 45 1 - Hall sensor/driver X - X 5140 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 - - 2804 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 95 8 - - X - - 2823 95 8 - - X - - 2824 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 900 14 2 - Hall sensor/driver X saturated X 3625 26 2 - Hall sensor/driver X saturated X 3626 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 50 4 - - X - - 2064 and 2068 1500 80 4 - - X - - 2065 and 2069 1800 50 4 - - X - - 2544 50 4 - - X - - 2540 3000 46 4 stepper motor controller/driver MOS - 7026 46 4 microstepping controller/driver MOS - 7044 4000 50 4 - - X - - 2878 80 4 - - X - - 2879 * 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 |
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