2559
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.
UDx2559LB
UDx2559B
16
1
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.
1
2
3
4
16
IN
IN
OUT
4
3
4
15
14
K
ENABLE
GROUND
GROUND
OUT
3
13
12
11
10
9
GROUND
5
6
GROUND
OUT
2
V
CC
7
8
K
IN
IN
2
1
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.
OUT
1
Dwg. PP-017-1
The suffix ‘B’ devices are 16-pin power DIPs, the suffix ‘EB’
devices are 28-lead power PLCCs and suffix ‘LB’ devices are 16-lead
power SOICs for surface-mount applications. All three packages are
of batwing construction to provide for maximum package power
dissipation.
ABSOLUTE MAXIMUM RATINGS
at TA = 25°C
Output Voltage, VOUT . . . . . . . . . 60 V
Over-Current Protected Output Voltage,
VOUT . . . . . . . . . . . . . . . . . . . 25 V
Output Current, IOUT . . . . . . . . . 1.0 A*
Supply Voltage, VCC .. . . . . . . . . 7.0 V
Input Voltage, VIN or VEN . . . . . . 7.0 V
FEATURES
■ 700 mA Output Current per Channel
Package Power Dissipation,
■ Independent Over-Current Protection for Each Driver
■ Thermal Protection for Device and Each Driver
■ Low Output-Saturation Voltage
PD . . . . . . . . . . . . . . . . See Graph
Operating Temperature Range, TA
Prefix ‘UDK’ . . . . -40°C to +125°C
Prefix ‘UDN’ . . . . . -20°C to +85°C
Prefix ‘UDQ’ . . . . . -40°C to +85°C
■ Integral Output Flyback Diodes
Storage Temperature Range,
■ TTL and 5 V CMOS Compatible Inputs
■ Pin-Compatible With UDQ2543B/EB and UDK2549B/EB
TS . . . . . . . . . . . . -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.
Always order by complete part number: a prefix to
indicate operating temperature range + the basic four-digit
part number + a suffix to indicate package style, e.g., UDK2559LB .
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