Reference Design for Isolated Gate Driver Power Stage with Active Miller Clamp for Solar Inverters
Description
This reference design consists of a single module with a reinforced: isolated IGBT gate driver with a dedicated gate drive power supply. This compact reference design controls IGBTs in solar inverters. The design uses a reinforced isolated IGBT gate driver with built-in IGBT DESAT detection and Miller clamp protection: enabling a unipolar supply voltage for the gate drive. Open-loop: push-pull topology-based power supply for each gate driver provides flexibility in PCB routing. The push-pull transformer driver used in this design operates at 420 kHz: which reduces the size of the isolation transformer: leading to a compact power supply. The module pinout matches our solar inverter platforms for testing: but can also be used as standalone drivers.
Features
- Suited for low to medium voltage inverters (400 V AC and 690 V AC)Integrated 2.5-A source and 5-A sink current suits driving IGBT modules with currents up to 50 ABuilt-in Miller clamp functionality enables use of unipolar supply voltage (17 V) for driving IGBT8000-VPK reinforced isolationVery high CMTI of >100 kV/usSpread spectrum operation of transformer driver helps reduce EMI emissions
Applications
- String inverter
- Force & torque sensor
Product Categories
- Power management