Gate drive optocoupler integrates flyback controller

August 18, 2014 // By Julien Happich
Avago Technologies' ACPL-302J is a new smart gate drive optocoupler device said to improve isolated power supply and to simplify gate drive design.

The ACPL-302J features an integrated flyback controller for DC-DC converters and a full set of fail-safe IGBT diagnostics, protection and fault reporting, providing a complete and cost-effective gate drive solution. With a 2.5A rail-to-rail output, the device is suitable for driving IGBTs and power MOSFETs in industrial power inverters and motor drives

By integrating the flyback controller, the ACPL-302J allows fewer discrete components and small high-efficiency transformer to be placed next to the device thereby reducing the overall footprint and minimising electromagnetic interference (EMI) and noise coupling between IGBT channels. The device also features integrated active Miller clamp, IGBT DESAT detection, and Under Voltage Lock-Out (ULVO) with feedback reducing bill of materials (BOM) cost and simplifying gate drive design.

Insulation voltage of V IORM = 1,230 V PEAK ensures reliable fail-safe protection in high voltage applications, with a wide creepage and clearance of 8.3 mm to meet stringent system level safety regulation. The device operates in the wide operating temperature range of -40 to +105 °C

Avago Technologies;