Power
Isolated IGBT gate-drive power supply reference design
This reference design from Texas Instruments provides isolated positive and negative voltage rails for Insulated Gate Bipolar Transistor (IGBT) gate drivers from 24V 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 one watt each.
The integration of the 100-V rated primary side switch within the flyback controller LM5180-Q1 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 load.
- Supplies output power up to 1.2W per IGBT driver.
- Provides compact and cost-effective solution due to elimination of optocoupler and transformer auxiliary winding.
- Provision to turn the power supply on and off through the EN pin.
- Programmable soft start limits the inrush current drawn by the power supply.
To learn more, click here.
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