Diodes Incorporated API21550Q Isolated Half-Bridge Gate Driver

Diodes Inc. API21550Q Isolated High-Side/Low-Side Half-Bridge Gate Driver is a gate driver with up to 4A/6A peak source/sink driving capability. Depending on working conditions, the API21550Q offers 5V, 8V, and 12V VDD UVLO options for driving GaN, MOSFETs, and IGBT/SIC devices.

The API21550Q operates with a maximum supply voltage of 25V for VDD, while the input range is 3V to 5.5V. The API21550Q is designed to transfer an input signal into an output drive signal with a short propagation delay and minimum pulse-width distortion. It also provides shoot-through protection with programmable dead time, and the external disable function enhances application flexibility. An integrated 14ns deglitch filter effectively makes the driver immune to noise interference.

The Diodes Inc. API21550Q provides 5700VRMS reinforced isolation in the SO-16W (Type CJ) package. All models can achieve a minimum of 125V/ns common-mode transient immunity (CMTI).

Features

  • Isolated H/L half-bridge gate driver
  • 3V to 5.5V input side supply voltage VCC
  • Up to 4A peak source and 6A peak sink current output
  • Common-Mode Transient Immunity (CMTI) greater than 125V/ns
  • Up to 25V VDD output drive supply
  • 5V, 8V, 12V VDD UVLO options
  • Switching parameters
    • 40ns typical propagation delay
    • 8ns maximum delay matching
    • 7ns maximum pulse-width distortion
    • 10μs maximum VDD power-up delay
  • Isolation barrier life > 40 years
  • Shoot-through protection and resistor-programmable dead time
  • 14ns integrated deglitch filter
  • Active pulldown feature
  • Safety-related certifications
    • 8000VPK SO-16W (Type CJ) per DIN EN IEC 60747-17 (VDE 0884-17)
    • 5700VRMS SO-16W (Type CJ) for 1 minute per UL 1577
    • CQC certification per GB4943.1
  • AEC-Q100 qualified with the following results
    • Device temperature grade 1
    • 4kV HBM ESD 
    • 1.5kV CDM ESD 
  • Packaged in SO-16W (Type CJ)
  • -40°C to +125°C operation temperature range
  • Lead-free and RoHS-compliant
  • Halogen and antimony-free, Green device
  • AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities

Applications

  • HEV and EV onboard chargers
  • Motor drives in automotive
  • Inverter control in HEV and EV
  • Isolated DC-to-DC converters in automotive

Functional Block Diagram

Block Diagram - Diodes Incorporated API21550Q Isolated Half-Bridge Gate Driver
Published: 2026-04-22 | Updated: 2026-05-21