Datasheet Microchip HV9901

HV9901
Universal Relay Driver
Features General Description The HV9901 universal relay driver provides high-efficiency driving for low-voltage relays with supply voltages as high as 450V. For example, a relay with a 5V
coil can be driven directly from the rectified 120 VAC or
230 VAC line. 10V to 450V Input Voltage Range
Energy-saving Hold Current Mode
Adjustable Microcontroller Supply
Low Supply Current <1 mA
Constant-current Coil Drive
Programmable Pull-in Current, Pull-in Time and
Hold Current Applications Industrial Controls
Relay Timers
Solenoid Drivers
Home Automation The IC includes two high-voltage linear regulators. The
first one is for providing power to internal control circuitry. The second one has an adjustable output voltage and a 1 mA output current capability to support
external circuitry, such as a microcontroller control circuit.
The pull-in current, pull-in time and hold current for the
relay are individually programmable through two resistors and a capacitor. PWM switching can be synchronized with an external clock or with another HV9901
operating at a higher frequency.
The relay is operated through the enable input ENI.
Logic polarity is under control of the polarity input POL.
Audible noise coming from the relay can be suppressed by operating at a PWM frequency exceeding
20 kHz. Package Type …