This reference design is a 2kW, high-density, 48V to 12V closed-loop bus converter based on a four-phase buck for enterprise computing. The design achieves > 98% peak efficiency and 97.5% full load efficiency at 48V VIN. The design uses the LMG3100R017, one of TI's high-performance gallium nitride (GaN) power stage devices. The control circuitry uses the UCD3138A, a high-performance microcontroller in a 40-pin quad flat no-lead (QFN) package.
Features
- High power density with a high peak (98%+) and full load efficiency (97.5%)
- Transformer-less regulated topology
- Low bill of materials (BOM) cost
- Easy to implement in a chip-down design in quarter brick form factor (36.8mm × 58.4mm × 18mm)
- 12V–48V boost configurable
- PMBus® compatible