2559
UDx2559B
PROTECTED
QUAD POWER DRIVER
Providing improved output current limiting, the UDK, UDN, and
UDQ2559B, EB, and LB quad power drivers combine AND logic
gates and high-current bipolar outputs with complete output protection.
Each of the four outputs will sink 700 mA in the on state. The outputs
have a minimum breakdown voltage (load dump) of 60 V and a
sustaining voltage of 40 V. The inputs are compatible with TTL and
5 V CMOS logic systems.
Over-current protection for each channel has been designed into
these devices and is activated at approximately 1 A. It protects each
output from short circuits with supply voltages up to 25 V. When an
output current trip point is reached, that output stage is driven linearly
resulting in a reduced output current level. If an over-current or short-
circuit condition continues, the thermal-limiting circuits will first sense
the rise in junction temperature and then the rise in chip temperature,
further decreasing the output current. Under worst-case conditions,
these devices will tolerate short circuits on all outputs, simultaneously.
These devices can be used to drive various loads including incan-
descent lamps (without warming or limiting resistors) or inductive
loads such as relays, solenoids, or dc stepping motors.
The packages offer fused leads for enhanced thermal dissipation.
Package B is a 16-pin power DIP with exposed tabs, EB is a 28-lead
power PLCC, and LB is a 16-lead power wide-body SOIC for surface-
mount applications. The lead (Pb) free versions have 100% matte tin
leadframe plating.
Data Sheet
29317.14F
OUT
4
K
OUT
3
GROUND
GROUND
OUT
2
K
OUT
1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN
4
IN
3
ENABLE
GROUND
GROUND
V
CC
IN
2
IN
1
Dwg. PP-017-1
ABSOLUTE MAXIMUM RATINGS
at T
A
= 25°C
Output Voltage, V
OUT
. . . . . . . . .
60 V
Over-Current Protected Output Voltage,
V
OUT
. . . . . . . . . . . . . . . . . . .
25 V
Output Current, I
OUT
. . . . . . . . .
1.0 A*
Supply Voltage, V
CC
. . . . . . . . . .
7.0 V
Input Voltage, V
IN
or V
EN
. . . . . .
7.0 V
Package Power Dissipation,
P
D
. . . . . . . . . . . . . . . .
See Graph
Operating Temperature Range, T
A
Prefix ‘UDK’ . . . .
-40°C to +125°C
Prefix ‘UDN’ . . . . .
-20°C to +85°C
Prefix ‘UDQ’ . . . . .
-40°C to +85°C
Storage Temperature Range,
T
S
. . . . . . . . . . . .
-55°C to +150°C
*Outputs are peak current limited at
approximately 1.0 A per driver. See
Circuit Description and Application for
further information.
FEATURES
■
■
■
■
■
■
700 mA Output Current per Channel
Independent Over-Current Protection for Each Driver
Thermal Protection for Device and Each Driver
Low Output-Saturation Voltage
Integral Output Flyback Diodes
TTL and 5 V CMOS Compatible Inputs
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
