Isolated IGBT gate-drive power supply reference design with integrated switch PSR flyback controller
Description
This reference design provides isolated positive and negative voltage rails for Insulated Gate Bipolar Transistor (IGBT) gate drivers from a 24-V DC input supply. It uses a flyback power supply topology to generate four pairs of 15-V and –5-V outputs suitable for powering six IGBT gate drivers of 1 W each. The integration of a 100-V rated primary-side switch within the LM5180 flyback converter together with the elimination of an auxiliary transformer winding enables a compact solution.
Features
- Quasi-resonant boundary conduction mode along with frequency modulation provides peak efficiency of 90% at balanced full loadSupplies output power up to 1.2 W per IGBT driverProvides compact and cost-effective solution due to elimination of opto-coupler and transformer auxiliary windingProvision to turn the power supply on and off through the EN pinProgrammable soft start limits the inrush current drawn by the power supply
Applications
- String inverter
- AC drive power stage module
- AC-input BLDC motor drive
- Servo drive power stage module
- Servo drive power supply module
- Railway auxiliary power
- Railway electric propulsion
- HVAC motor control
- Robot servo drive
Product Categories
- Power management