User Guide
TDTTP4000W066B: 4kW Bridgeless Totem-pole PFC Evaluation Board
Overview
This user guide describes the TDTTP4000W066B_0v1 4kW bridgeless totem-pole power factor correction (PFC) evaluation
board. Very high efficiency single-phase AC-DC conversion is achieved with the TP65H035WS, a diode-free Gallium Nitride (GaN)
FET bridge with low reverse-recovery charge. Using GaN FETs in the fast-switching leg of the circuit and low-resistance MOSFETs
in the slow-switching leg of the circuit results in improved performance and efficiency. For more information and complete
design files, please visit transphormusa.com/tp4kit. The TDTTP4000W066B_0v1-KIT is for evaluation purposes only.
Figure 1. TDTTP4000W066B_0v1 4kW totem-pole PFC evaluation board
Warning
This evaluation board is intended to demonstrate GaN FET technology and is for demonstration purposes only and no guarantees are made for standards
compliance.
There are areas of this evaluation board that have exposed access to hazardous high voltage levels. Exercise caution to avoid contact with those voltages. Also
note that the evaluation board may retain high voltage temporarily after input power has been removed. Exercise caution when handling.
When testing converters on an evaluation board, ensure adequate cooling. Apply cooling air with a fan blowing across the converter or across a heatsink
attached to the converter. Monitor the converter temperature to ensure it does not exceed the maximum rated per the datasheet specification.
September 1, 2017 2017 Transphorm Inc. Subject to change without notice.
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TDTTP4000W066B input/output specifications
Input voltage: 85VAC to 265VAC, 47Hz to 63Hz
Input current: 18Arms; 2000W at 115V , 4000W at 230V )
AC AC
10% overload short time: 19.8Arms; 2200W at 115VAC, 4400W at 230VAC)
Ambient temperature: <50C
Output voltage: 387V 5V
DC DC
PWM frequency: 66kHz
Auxiliary supply: 12VDC for bias voltage
Power dissipation in the GaN FET: Limited by the maximum junction temperature; refer to the TP65H035WS datasheet
Figure 2 shows the input and output connections. To reduce EMI noise, adding a ferrite core at both the input and output is
recommended.
Figure 2. Input and output cable connections
TDTTP4000W066B_0v1 September 1, 2017
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