Texas Instruments PFC23338EVM-107 User Manual

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EVM User's Guide: PFC23338EVM-107
PFC23338EVM-107 Evaluation Motherboard
Description
This reference design 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 low
cost current sensing option using TMCS1133 is also
provided in this design. The supply is designed
to support a maximum input current of 16-ARMS
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 TI 25-30mΩ high-voltage GaN
FET with integrated driver and protections, 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
Board Side View
SNOU215 – JANUARY 2025
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reinforced isolated modulator to achieve industry
leading 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%.
Features
• Integrated e-metering function with 0.5% accuracy
• <10% iTHD at 0–10% load, <5% iTHD at 10%–
20% load, <3% iTHD at 20%–50% load, <2% iTHD
at 50%–100% load
• Peak efficiency of 98.93% at 230Vac
• Smart re-rush current control when AC comes
back from dropout, meet M-CRPS re-rush current
specification
• Include baby boost converter to extend holdup
time and allow only 720µF bulk cap
• Two current sense options: Isolated Delta-Sigma
Modulator (default) or Hall Sensor
• GaN optimized with driver integration
• 3.6kW rated power targeting 73.5mm M-CRPS
PSU
Applications
• Rack and server PSU with 48V output
• Server PSU with 12V output
• Merchant telecom rectifiers
• Industrial AC-DC
• Single phase online UPS
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Board Top View
PFC23338EVM-107 Evaluation Motherboard
Description
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