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.

FEATURES

ABSOLUTE MAXIMUM RATINGS

60 V

Over-Current Protected Output Voltage,

25 V

Package Power Dissipation,

Prefix ‘UDK’ . . . . -40°C to +125°C

Prefix ‘UDN’ . . . . . -20°C to +85°C

Prefix ‘UDQ’ . . . . . -40°C to +85°C

Storage Temperature Range,

*Outputs are peak current limited at

approximately 1.0 A per driver. See

Circuit Description and Application for

further information.

2559

1

2

3

14

4

5

6

7

8

9

10

11

12

13

15

16

ENABLE

GROUND

GROUND

K

GROUND

GROUND

K

Dwg. PP-017-1