PMP22835 Reference Design

Texas Instruments

Isolated IGBT and SiC driver bias supply reference design for traction-inverter applications

Description

This isolated open-loop LLC transformer driver converter provides dual +20-V and -4-V outputs up to 6 W for traction inverter applications. The LLC topology allows the transformer to have significant leakage inductance: but a much smaller primary-secondary capacitance: which significantly reduces common-mode current injection through the bias transformer. This reference design offers a high level of integration and high efficiency in a compact form factor. 

Features
  • Open-loop architecture eliminates secondary feedback resulting in a compact sizeLLC topology utilizes the transformer's leakage inductance allowing small secondary side resonant capacitorsSecondary-side resonance is less sensitive to external component tolerancesHigh efficiency (85% at 50% loading)Excellent total output voltage regulation
Applications
  • Traction inverter-high voltage
Product Categories
  • Power management