General Description
The Supertex HV9901 is a BiCMOS/DMOS universal relay driver that employs PWM switching techniques. It is designed for efficient and energy-saving operation of a low voltage relay with supply voltages ranging from 8 to 450V DC through utilization of the relay coils’ inductance.

Features
❐ 8V to 450V Input Voltage Range
❐ Energy Saving Hold Current Mode
❐ Adjustable Microcontroller Supply
❐ Low Supply Current <1mA
❐ Constant Current Coil Drive
❐ Programmable Pull-in Current, Pull-in Time, and Hold Current
❐ Efficient PWM Operation Using the Relay Coils’ Inductance

Applications
❏ Industrial Controls
❏ Relay Timers
❏ White Goods
❏ Solenoid Drivers
❐ Home Automation