Back to Vishay

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 IF = 10mA
  • Short-circuit current of 21µA typical at IF = 10mA
  • LED forward voltage range of 1.2V to 1.6V at IF = 10mA
  • Open-circuit voltage values
    • 6.8V minimum and 7.7V typical at IF = 10mA
    • 8.0V typical at IF = 20mA
    • 8.1V typical at IF = 30mA
  • Short-circuit current values
    • 10µA minimum and 21µA typical at IF = 10mA
    • 49µA typical at IF = 20mA
    • 77µA typical at IF = 30mA
  • Isolation test voltage of 3750VRMS
  • Turn-on time of 31µs typical with CL = 200pF, IF = 20mA, PW = 2ms, and 50% duty cycle
  • Turn-off time of 180µs typical with CL = 200pF, IF = 20mA, PW = 2ms, and 50% duty cycle
  • Maximum transient isolation voltage of 6000Vpeak
  • Maximum repetitive peak isolation voltage of 707Vpeak
  • Creepage and clearance distances of at least 5mm in SOP-4 package
  • LED continuous forward current of 50mA
  • LED reverse voltage of 5V at IR ≤ 10µA
  • Ambient operating temperature range of -40°C to +100°C
  • Storage temperature range of -40°C to +125°C

Typical Application

Application Circuit Diagram - Vishay Semiconductors VOM1272 Optically Isolated MOSFET Driver

Test Circuit & Waveforms

Location Circuit - Vishay Semiconductors VOM1272 Optically Isolated MOSFET Driver
Published: 2026-08-10 | Updated: 2026-08-10