UDN2987x-6: DABIC-5 8-Channel Source Driver with Overcurrent Protection (PDF) - ALLEGRO MICROSYSTEMS - #1

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OUT1 IN4 IN5 IN6 IN7 IN8 FAULT IN3 2987 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 IN2 IN1 4.75 to 35 V 1 to 8 Load Components CPU GND OE/R ¯ VS Description Providing overcurrent protection for each of its eight sourcing outputs, the UDN2987A-6 and UDN2987LW-6 drivers are used as an interface between standard low-level logic and relays, motors, solenoids, LEDs, and incandescent lamps. These devices include thermal shut down and output transient protection/clamp diodes for use with sustaining voltages to 35 V. In these drivers, 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 29876-DS, Rev. 3 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) DABIC-5 8-Channel Source Driver with Overcurrent Protection Continued on the next page… Packages: Typical Application Not to scale UDN2987x-6 20-pin DIP 20-pin SOICW (A package) (LW package)