Texas Instruments UCD3138 Digital Resonant LLC Converter Evaluation Module UCD3138LLCEVM-028 UCD3138LLCEVM-028 데이터 시트
제품 코드
UCD3138LLCEVM-028
Test Procedure
8
Test Procedure
8.1
Efficiency Measurement Procedure
WARNING
• Danger of electrical shock! High voltage present during the
measurement.
• Do not leave EVM powered when unattended.
• Danger of heat burn from high temperature.
• Danger of heat burn from high temperature.
1. Refer to
for basic set up to measure power conversion efficiency. The required equipment for
this measurement is listed in
.
2. Before making electrical connections, visually check the boards to make sure no shipping damage
occurred.
3. In this EVM package, three EVMs are included, UCD3138LLCEVM-028, UCD3138CC64EVM-030, and
USB-TO-GPIO. For this measurement, the UCD3138LLCEVM-028 and UCD3138CC64EVM-030
boards are needed.
boards are needed.
4. First install the UCD3138CC64EVM-030 board onto the UCD3138LLCEVM-028. Care must be taken
with the alignment and orientation of the two boards, or damage may occur. Refer to
for
UCD3138PFCEVM-030 board orientation.
5. Connect the DC voltage source to J8 (+) and J9 (-). The DC voltage source should be isolated and
meet IEC61010 requirements. Set up the DC output voltage in the range specified in
, between
350 V
DC
and 400 V
DC
; set up the DC source current limit 1.2 A.
NOTE:
The board has no fuse installed and relies on the external voltage source current limit for
circuit protection.
6. Connect an electronic load with either constant-current mode or constant-resistance mode. The load
range is from zero to 29 A.
7. Check and make sure a jumper is installed on J6.
8. It is recommended to use the switch SW1 to turn on the board output after the input voltage is applied
to the board. Before applying input voltage, make sure the switch, SW1, is in the OFF position.
9. If the load does not have a current or a power display, a current meter or low ohmic shunt and DMM is
needed between the load and the board for current measurements.
10. Connect a volt-meter across the output connector and set the volt-meter scale 0 V to 15 V on its
voltage, DC.
11. Turn on the DC voltage source output, flip SW1 to ON and vary the load. Record output voltage and
current measurements.
8.2
Equipment Shutdown
1. Shut down the DC voltage source.
2. Shut down the electronic load.
13
SLUU979A – August 2012 – Revised July 2013
Digitally Controlled LLC Resonant Half-Bridge DC-DC Converter
Copyright © 2012–2013, Texas Instruments Incorporated