UDN2559EBTRT Allegro Micro Systems, Inc., UDN2559EBTRT Datasheet

UDN2559EBTRT

Manufacturer Part Number

UDN2559EBTRT

Description

28-PLCC

Manufacturer

Allegro Micro Systems, Inc.

Datasheet

1.UDN2559EBTRT.pdf (8 pages)

Specifications of UDN2559EBTRT

Date_code

09+

Current page: 1 of 8
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Features and Benefits

▪ 700 mA output current per channel

▪ Independent overcurrent 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

Packages:

Not to scale

29317.14K

with exposed thermal tabs

(B package)

16-pin DIP

with internally fused pins

ENABLE

16-pin SOICW

(LB package)

(Package EB)

28-pin PLCC

Functional Block Diagram

(1 of 4 Channels)

Protected Quad Power Driver

Thermal

Description

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

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.

Overcurrent 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

incandescent 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.

Limit

<< 1Ω

OUT

2559

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