Broadcom ACPL-K34T Automotive High Output Optocoupler

Broadcom ACPL-K34T 2.5 Amp Automotive R²Coupler Gate Drive Optocoupler contains an AlGaAs LED, which is optically coupled to an integrated circuit with a power output stage. The ACPL-K34T features fast propagation delay and tight timing skew, is ideally designed for driving power MOSFETs used in AC-DC and DC-DC converters. The high operating voltage range of the output stage provides the drive voltages required by gate controlled devices.The voltage and high peak output current supplied by this optocoupler make it ideally suited for direct driving power MOSFETs at high frequency for high efficiency conversion. Avago R2Coupler isolation products provide reinforced insulation and reliability that delivers safe signal isolation critical in automotive and high temperature industrial applications.


  • Qualified to AEC-Q100 grade 1 test guidelines
  • -40°C to 125°C Automotive temperature range
  • 2.0A min. Peak output current
  • Rail-to-rail output voltage
  • 110ns Max. propagation delay
  • +50ns/-40ns Dead time distortion
  • LED current input drive with hysteresis
  • 35kV/μs min. at VCM=1500V Common Mode Rejection (CMR)
  • ICC=3.9mA Max. low supply current allow bootstrap half-bridge topology
  • Under Voltage Lock-Out (UVLO) protection with hysteresis for power MOSFET
  • 10V to 20V Wide operating VCC range
  • Safety Approvals: - UL Recognized 5000VRMS for 1 min - CSA - IEC/EN/DIN EN 60747-5-5 VIORM=1140Vpeak


  • Hybrid power train DC/DC converter
  • EV/PHEV Charger
  • Automotive isolated MOSFET gate drive
  • AC and brushless DC motor drives

Block Diagram

Broadcom ACPL-K34T Automotive High Output Optocoupler
Published: 2013-11-26 | Updated: 2022-03-11