Texas Instruments Evaluation Module for UCC28250 Advanced PWM Controller with Pre-Bias Operation UCC28250EVM-501 UCC28250EVM-501 데이터 시트
제품 코드
UCC28250EVM-501
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Test Procedure
6
Test Procedure
Set up the EVM based on
CAUTION
!! Caution: High voltage and high temperature present when the EVM is in
operation !!
operation !!
6.1
Line/Load Regulation and Efficiency Measurement Procedure
1. Connect the ammeter A1 (0 A to 10 A range) between DC source and J1 as shown in
2. Prior to connecting the DC source, it is advisable to limit the source current to 3 A maximum. Make
sure the DC source is initially set to 0 V and connected to J1 and A1 as shown in
.
3. Connect voltmeter, V1 across the DC source as shown in
.
4. Connect Load1 to J5 as shown in
. Set Load1 to constant current mode to sink 0 A
DC
before
the input voltage on J1 is applied.
5. Connect voltmeter, V2 to J2 and TP10 as shown in
6. Turn on fan making sure to blow air directly on the EVM.
7. Set S1 to ON position, then increase the DC source voltage from 0 V to 36.0 V
7. Set S1 to ON position, then increase the DC source voltage from 0 V to 36.0 V
DC
.
8. Measure VOUT (V2), IOUT, VIN (V1) and I
IN
(A1).
9. Vary LOAD1 from 0 A to a higher value, up to 23 A
DC
.
10. Repeat step 8.
11. Increase input voltage to a different value, up to 72 V, and repeat step 8 and 9.
11. Increase input voltage to a different value, up to 72 V, and repeat step 8 and 9.
6.2
Equipment Shutdown
1. Decrease Load1 to 0 A.
2. Decrease VIN from 72.0 V
2. Decrease VIN from 72.0 V
DC
to 0 V.
3. Shut down VIN and Fan.
4. Shut down the load.
4. Shut down the load.
7
SLUU429B – June 2010 – Revised December 2010
Half-Bridge DC-to-DC Converter With Primary-Side Control
© 2010, Texas Instruments Incorporated