November 16, 2017 © 2017 Transphorm Inc. Subject to change without notice.
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User Guide
TDTTP2500P100: 2.5kW Bridgeless Totem-pole PFC Evaluation
Board
Overview
This user guide describes the TDTTP2500P100_0v1 2.5kW bridgeless totem-pole power factor correction (PFC) evaluation
board. Very high efficiency single-phase AC-DC conversion is achieved with the TPH3212PS, 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/tp25kit.
The TDTTP2500P100_0v1-KIT is for evaluation purposes only.
Figure 1. TDTTP2500P100_0v1 2.5kW 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.
TDTTP2500P100_0v1 November 16, 2017
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TDTTP2500P100 User Guide
The TDTTP2500P100-KIT includes:
• TDTTP2500P100 totem-pole PFC assembly
• Texas Instruments F28335 control card
• 12V
DC
auxiliary power adaptor
Complete design
files and support documentation can be found online at transphormusa.com/tp25kit.
TDTTP2500P100 input/output specifications
• I
nput voltage: 85V
AC
to 265V
AC
, 47Hz to 63Hz
• Input current: 18A
RMS
; 1250W at 115V
AC
, 2500W at 230V
AC
• 10% overload short time: 11A
RMS
; 1250W at 115V
AC
, 2500W at 230V
AC
• Ambient temperature: <50ºC
• Output voltage: 390V
DC
± 5V
DC
�� PWM frequency: 100kHz
• Auxiliary supply: 12V
DC
for bias voltage
• Power dissipation in the GaN FET: Limited by the maximum junction temperature; refer to the TPH3212PS 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