Intersil – ISL6731A/B: Power Factor Correction Controllers

ISL6731A/B: Power Factor Correction Controllers

The ISL6731A and ISL6731B are active power factor correction (PFC) controller ICs that use a boost topology that are suitable for AC/DC power systems up to 2kW and over the universal line input. The internally clamped 12.5V gate driver delivers 1.5A peak current to the external power MOSFET. The ISL6731A/B is fully protected with protection features including cycle-bycycle over-current, overpower limit, over-temperature, input brownout, output over-voltage and under-voltage protection.


  • CCM mode with negative capacitance generator
  • Automatic pulse skipping with programmable threshold
  • 62kHz (ISL6731B) and 124kHz (ISL6731A) switching frequency
  • Input average power limit
  • Input brownout protection
  • Built-in current amplifier with flexibility of gain change
  • Programmable or automatic shutdown
  • Cycle-by-cycle current limit
  • OVP and OTP protection
  • SOIC-14 package