Transphorm TDTTP4000W066C 0v2 Manuale utente
TDTTP4000W066C_0v2
Evaluation Platform
4kW Digital Bridgeless Totem-Pole PFC
Quick Start Guide
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transphormusa.com
TDTTP4000W066C_0v2
For evaluation purposes only
Design les and more at
transphormusa.com/en/evaluation-kit/
tdttp4000w066c-ki
2/2020
Equipment Needed
gThe TDTTP4000W066C_0v2 board
gMicrochip DSPIC33CK256MP506 (MA330048)
gHigh-voltage AC power supply for input
g12VDC auxiliary power adapter (included)
gElectronic/Resistive load
• Power range: 0W to 4500W
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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 specication.
See page 5 for operating guidelines.
Cautions and Warnings
Typical Performance Curves
97
97.5
98
98.5
99
99.5
01000 2000 3000 4000 5000
Efficiency (%)
Output Power (W)
0
10
20
30
40
50
60
70
01000 2000 3000 4000 5000
Power Loss (W)
Output Power (W)
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Step 3: Power-down the Board
gReduce load to reect < 2000W
gSwitch o the high-voltage AC power input.
gPower o the Auxilary Supply
gVerify Input and Output voltage = 0 with multi-meter / power analyzer.
Probing
There are two voltage probing sockets to measure VGS and VDS of the GaN FET shown
below.
`
Step 2: Power-up the Board
gInsert the MicroChip Plug-In-Module (PIM) to the Conn1 slot.
gConnect an electronic/resistive load to the corresponding marking (CN2).
The requirements for the resistive load are:
• At lowline, 115VAC, input: 0W and ≤2200W
• At highline, 230VAC, input: 0W and ≤4400W
gConnect the 12VDC auxiliary supply (included) to the evaluation board
gVerify that both fans attached to the heatsink are running
gWith high-voltage power o, connect the high-voltage AC power input to the
corresponding marking (CN1) on the PCB; N and L (PE: potential ground)
gTurn on the AC power input (85VAC to 265VAC, 50Hz to 60Hz); minimum power
load for turn-on sequence is 350W
gMonitor CN2 output voltage with VDC meter to verify that 385V ±5V is generated
gLoad can be increased when AC supply is on and board is functional
Note:
See page 5 for important operating guidelines
By removing the jumpers and using a short wire to clamp the current probe, the PFC
inductor can also be measured.
Passive voltage
probe
Remove jumpers and
add a cable for inductor
current measurement
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Step 1: Connect the Board
Important Operating Guidelines
The TDTTP4000W066C is for evaluation purposes only and is not intended to be a
nished product and does not include all protection features found in commercial
power supplies. Additional warnings to keep in mind:
gAn isolated AC source should be used as input. An isolated lab bench-grade
power supply or the included AUX DC supply should also be used for the 12V DC
power supply. Float the oscilloscope by using an isolated oscilloscope or by
disabling the PE (Protective Earth) pin in the power plug. Float the current probe
power supply (if any) by disabling the PE pin in the power plug.
gUse a resistive load only. The totem-pole PFC kit can work at zero load with burst
mode and the output voltage will be swinging between 375V and 385V during
burst mode.
gThe evaluation board is not fully-tested at large load steps. DO NOT apply a very
large step in the load (>1500W) when it is running.
gDO NOT manually probe the waveforms when the board is running. Set up
probing before powering up the demo board.
gThe auxiliary VDC supply must be 12V. The evaluation board will not work under
10V or over 15V VDC, for example.
gDO NOT touch any part of the evaluation board when it is running.
gWhen plugging the control card into the socket, make sure the control card is
fully pushed down.
gIf the evaluation circuit goes into protection mode it will work as a diode bridge
by shutting down all PWM functions. Recycle the bias power supply to reset the DSP
and exit protection mode.
gDO NOT use a passive probe to measure control circuit signals and power circuit
signals at the same time. GND1 and AGND are not the same ground.
gTo get clean VGS of the low side GaN FET, it is not recommended to measure the
VDS at the same time.
gIt is not recommended to use a passive voltage probe for VDS and VGS
measurements while simultaneously using a dierential voltage probe for VIN
measurements, unless the dierential probe has very good dv/dt immunity.
Indice
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