Download

PDF Abstract Text:

2878 AND 2879

QUAD HIGH-CURRENT DARLINGTON SWITCHES

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.
Data Sheet 29305.10B
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
Dwg. No. A-11, 974
FEATURES
s Output Currents to 4 A s Loads to 1280 W
s Output Voltages to 80 V
s TTL, DTL, or CMOS Compatible Inputs s Internal Clamp Diodes s Heat-Sink Tab s Plastic Single In-Line Package
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
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
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.
2878 AND 2879 QUAD HIGH-CURRENT DARLINGTON SWITCHES
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
µA OPEN ICEX
VIN V VCE
Dwg. No. A-9729A
Dwg. No. A-10, 350
Dwg. No. A-9732
FIGURE 1
FIGURE 2
FIGURE 3
V OPEN VF
Dwg. No. A-9734A
Dwg. No. A-9735A
Dwg. No. A-9736
FIGURE 4
FIGURE 5
FIGURE 6
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)
INDEX AREA
0.290 MIN
Dwg. MP-007 in
NOTES:
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)
INDEX AREA
7.36 MIN
Dwg. MP-007 mm
NOTES:
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
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 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