TEST REPORT
Highly-Integrated, Dual-Output Isolated Bias Supply Reference Design With Reinforced Insulation
Description
This reference design generates two isolated +12-V rails at 100 mA each from a 12-VDC input voltage. The design is optimized for a small footprint by employing a primary resonant LLC topology with a single UCC25800 driver and a transformer with reinforced insulation. This design is well-suited for an application where bias power is needed across a high-voltage isolation barrier.
Features
- Small size with simplified LLC design
- High efficiency: 85% at full load
- Dual output for high-side (HS) and low-side (LS) drivers
- Employs small and low-cost transformer
- Reinforced insulation for bias supplies crossing high-voltage isolation barriers
Applications
- GaN, IGBT and SiC gate transformer driver bias supply
- Automotive onboard charger (OBC)
- Automotive DC/DC converter
- Automotive traction inverter and motor control
Top of Board (Angled)
Bottom of Board
Top of Board1 Design Information
1.1 Voltage and Current Specifications
Table 1-1 Voltage and Current
Requirements
| Parameter | Specifications |
|---|---|
| VIN | 12 V |
| VOUT HS, VOUT LS | 12 V, ±10% |
| IOUT LS, IOUT HS | 100 mA |
