Vishay Semiconductors VOM1272 Optically Isolated MOSFET Driver

Vishay Semiconductors VOM1272 Optically Isolated MOSFET Driver is a stand-alone photovoltaic driver for isolated MOSFET gate-drive applications. The VOM1272 obtains the current required for its internal circuitry from the LED current on the low-voltage primary side of the isolation barrier, helping eliminate the need for one or more external power supplies. Integrated rapid turn-off circuitry reduces the need for additional external components and improves switching speed.

The Vishay Semiconductors VOM1272 Driver combines enhanced insulation performance, logic-compatible input, and a compact SOP-4 package for space-conscious driver designs. The optically isolated MOSFET driver works well in high-side drivers, solid-state relays, floating power supplies, power control systems, data acquisition equipment, automatic test equipment, and isolated solenoid or relay driver applications.

Features

LED-current-powered internal circuitry to reduce external power supply requirements
Integrated rapid turn-off circuitry to help improve switching speed
Logic-compatible input for control interface flexibility

Enhanced insulation capacity through a mold compound with a high comparative tracking index
Compact SOP-4 package for small-footprint isolated gate driver designs

Applications

High-side driver
Solid-state relays
Floating power supply
Power control
Data acquisition

Automatic test equipment
Isolated solenoid drivers
Isolated high-current relay drivers
Isolated high-voltage relay drivers

Specifications

Open-circuit voltage of 7.7V typical at I_F = 10mA
Short-circuit current of 21µA typical at I_F = 10mA
LED forward voltage range of 1.2V to 1.6V at I_F = 10mA
Open-circuit voltage values
- 6.8V minimum and 7.7V typical at I_F = 10mA
- 8.0V typical at I_F = 20mA
- 8.1V typical at I_F = 30mA
Short-circuit current values
- 10µA minimum and 21µA typical at I_F = 10mA
- 49µA typical at I_F = 20mA
- 77µA typical at I_F = 30mA
Isolation test voltage of 3750V_RMS

Turn-on time of 31µs typical with C_L = 200pF, I_F = 20mA, PW = 2ms, and 50% duty cycle
Turn-off time of 180µs typical with C_L = 200pF, I_F = 20mA, PW = 2ms, and 50% duty cycle
Maximum transient isolation voltage of 6000V_peak
Maximum repetitive peak isolation voltage of 707V_peak
Creepage and clearance distances of at least 5mm in SOP-4 package
LED continuous forward current of 50mA
LED reverse voltage of 5V at I_R ≤ 10µA
Ambient operating temperature range of -40°C to +100°C
Storage temperature range of -40°C to +125°C