UDN2987X-6_12 Datasheet, PDF (1/9 Pages) Allegro MicroSystems – Providing overcurrent protection for each of its eight sourcing outputs, the UDN2987LW-6 driver is used as an..

UDN2987x-6
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
Features and Benefits
▪ 4.75 to 35 V driver supply voltage
▪ Output enable-disable (OE/R)
▪ 350 mA output source current
▪ Overcurrent protected
▪ Internal ground clamp diodes
▪ Output Breakdown Voltage 35 V minimum
▪ TTL, DTL, PMOS, or CMOS compatible inputs
▪ Internal Thermal Shutdown (TSD)
Package: 20-pin SOICW (suffix LW)
Not to scale
Description
Providing overcurrent protection for each of its eight
sourcing outputs, the UDN2987LW-6 driver is used as an
interface between standard low-level logic and relays, motors,
solenoids, LEDs, and incandescent lamps. This device includes
thermal shutdown and output transient protection/clamp diodes
for use with sustaining voltages to 35 V.
In this driver, each channel includes a latch to turn off that
channel if the maximum channel current is exceeded. All
channels are disabled if the thermal shutdown is activated. A
common FAULT output is used to indicate either chip thermal
shutdown or any overcurrent condition.All outputs are enabled
by pulling the common OE/R input high. When OE/¯R is low,
all outputs are inhibited and the eight latches are reset. The
OE/¯R function can be especially important during power-up,
in preventing floating inputs from turning on the outputs.
Under normal operating conditions, each of eight outputs
will source in excess of 100 mA continuously at an ambient
temperature of 25°C and a supply of 35 V. The overcurrent
fault circuit will protect the device from short-circuits to ground
with supply voltages of up to 30 V.
Continued on the next page…
Typical Application
CPU
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
FAULT
OE/R¯
2987
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
GND
VS
1 to 8 Load
Components
4.75 to 35 V
29876-DS, Rev. 6