Allegro UDN2944W Datasheet

Data Sheet

29309.10†

2944

QUAD HIGH-CURRENT,

HIGH-VOLTAGE SOURCE DRIVER

Capable of driving loads to 4 A at supply voltages to 60 V (induc­tive loads to 35 V), the UDN2944W is a quad high-current, high­voltage source driver. Each of the four power drivers can provide

V

S

space- and cost-saving interface between low-level signal-processing
circuits and high-power loads in harsh environments.

Individual supply lines have been provided for each pair of drivers
so that different supplies can be used to drive multiple loads. The
controlling inputs are TTL or CMOS compatible. The outputs include
transient-suppression diodes for inductive loads.

This quad Darlington array is designed to serve as an interface
between low-level circuitry and peripheral-power loads such as sole­noids, motors, incandescent displays, heaters, and similar loads of up to
240 W per channel. The UDN2944W is an ideal complement to the
UDN2878W quad 4 A sink driver.

Dwg. No. A-13,054

ABSOLUTE MAXIMUM RATINGS

at +25°C Free-Air Temperature

Supply Voltage Range, VS..... 10 V to 60 V

Output Current, I

(continuous) ............................... - 4.0 A

(peak)......................................... -5.0 A

Input Voltage, VIN................................ 15 V

Package Power Dissipation,

P

....................................... See Graph

D

Operating Temperature Range,

T

................................ -20°C to +85°C

A

Storage Temperature Range,

T

.............................. -55°C to +150°C

S

Output current rating will be limited by
ambient temperature, duty cycle, heat
sinking, air flow, and number of outputs
conducting. Under any set of conditions, do
not exceed the -5.0 A peak current or a
junction temperature of +150°C.

OUT

For maximum power-handling capability, the UDN2944W driver
is supplied in a 12-pin single in-line, power-tab package that allows
efficient attachment of an external heat sink for maximum allowable
package power dissipation. An external heat sink is usually required
for proper operation of this device. The tab is at ground potential and
needs no insulation.

FEATURES

■ Output Current to 4 A

■ Output Voltage to 60 V

■ Loads to 960 W

■ Integral Output Suppression Diodes

■ TTL and CMOS Compatible Inputs

■ Plastic Single In-Line Package

■ Heat-Sink Tab

Always order by complete part number: UDN2944W .

2944

QUAD HIGH-CURRENT,
HIGH-VOLTAGE
SOURCE DRIVER

PARTIAL SCHEMATIC

10

R = 2.0°C/W

θJT

8

6

12°C/W HEAT SINK

4

2

FREE AIR, R = 38°C/W

0

ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS

25

50 75 100 125 150

TEMPERATURE IN °C

3.0°C/W HEAT SINK

R = 14°C/W

θJA

θJA

R = 5.0°C/W

θJA

Dwg. No. A-13,058

TRUTH TABLE

INPUT ENABLE OUTPUT

LLL

HLH

LHL

HHL

NOTE: Pin 3 must be connected to VS for

operation of input logic gates.

Dwg. GP-012B

115 Northeast Cutoff, Box 15036
W

Worcester, Massachusetts 01615-0036 [phone]
Copyright © 1986, 2000 Allegro MicroSystems, Inc.

2944

QUAD HIGH-CURRENT,

HIGH-VOLTAGE

SOURCE DRIVER

ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ +150°C, VS = 60 V, V

ENABLE

= 0 V

(unless otherwise noted).

Limits

Characteristic Symbol Test Conditions Min. Max. Units

Supply Voltage Range V

Output Leakage Current I

Output Sustaining Voltage V

Output Saturation Voltage V

S

CEX

CE(sus)

CE(SAT)

Input Voltage Logic 1 V

Logic 0 V

Input Current Logic 1 V

Logic 0 V

Total Supply Current I

Clamp Diode Leakage Current I

Clamp Diode Forward Voltage V

Turn-On Delay t

Turn-Off Delay t

S

R

F

ON

OFF

V

= 0 V, V

OUT

I

= -4 A, L = 3 mH 35 — V

OUT

I

= -1 A, VIN = 2.4 V — 1.8 V

OUT

I

= -4 A, VIN = 2.4 V — 2.5 V

OUT

or V

V

IN(1)

IN(0)

IN(1)

IN(1)

IN(0)

or V

or V

or V

or V

ENABLE(1)

ENABLE(0)

ENABLE(1)

ENABLE(1)

ENABLE(0)

= 2.4 V — 50 µA

ENABLE

= 2.4 V — 220 µA

= 12 V — 1.5 mA

= 0.8 V — 50 µA

All drivers on, All outputs open — 25 mA

VR = 60 V — 50 µA

IF = 4 A — 2.2 V

0.5 Ein to 0.5 E

0.5 Ein to 0.5 E

, RL = 15 Ω — 2.0 µs

out

, RL = 15 Ω —10 µs

out

10 60 V

2.0 — V

— 0.8 V

NOTE: Negative current is defined as coming out of (sourcing) the device being tested.

TYPICAL APPLICATION

QUAD RELAY DRIVE

(Using 2 Voltage Sources

and Optional PWM Current Limiting)

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