This evaluation motherboard is a Gallium nitride (GaN) based, 3.6kW, single-phase, continuous conduction mode (CCM) totem-pole bridgeless power factor correction (PFC) converter targeting M-CRPS server power supply. This design includes e-meter functionality with 0.5% accuracy using AMCx306 as current sensing device, eliminating the need for external power metering ICs. An alternative cost-optimized current sensing option using TMCS1133 is also provided in this design. The supply is designed to support a maximum input current of 16ARMS and peak power of 3.6kW. The power stage is followed by a baby boost converter, which helps to greatly reduce the size of the bulk capacitor. This design works with TI GaN half bridge daughter cards (E.g. LMG3522EVM-042, LMG3422EVM-043, LMG3650EVM-113). LMG3522R030, LMG3422R030, LMG3650R025 are 25mΩ to 30mΩ high-voltage GaN FETs with integrated driver and protections that enable high efficiency and high power density. The F28003x C2000™ real-time microcontroller is used for all the advanced controls including re-rush current limit, baby boost operation during AC drop out event, e-metering, and communication between PFC and house-keeping controller. In addition, the F28003x microcontroller has built-in sigma-delta filter module to interface with AMC1306 precision current sensing reinforced isolated modulator to achieve low total harmonic distortion (iTHD) and high measurement accuracy. The PFC operates at a switching frequency of 65kHz and achieves peak efficiency of 98.93%.
| Type | Title | Date | ||
|---|---|---|---|---|
| EVM User's guide | PFC23338EVM-107 Evaluation Motherboard | PDF | HTML | 17 Jan 2025 | |
| Certificate | PFC23338EVM-107 EU Declaration of Conformity (DoC) | 12 Dec 2024 |
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