DABIC-5 8-Channel Source Driver with Overcurrent Protection
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. The inputs are compatible with 5 and 12 V logic systems: TTL, Schottky TTL, DTL, PMOS, and CMOS. In all cases, the output is switched ON by an active high input level. Compared to predecessor devices, the UDN2987LW-6 has a significantly faster TPHL (200 ns typical) and a lower driver supply voltage rating (4.75 V), which allows the use of 5 V logic. The UDN2987LW-6 is supplied in a 20-lead small-outline (SOIC-W) plastic package. All packages are lead (Pb) free, with 100% mattetin leadframe plating.
Features:
• 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)
