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Test Procedure
6 Test Procedure
6.1 Start-Up Procedure
1. Prior to connecting the DC input source V
maximum. Make sure V
2. Ensure LOAD1 and LOAD2 are set to constant current mode to sink 0 A before V
3. Verify SW1 and SW2 are in the desired position.
4. Place a fan as shown in
5. Increase V
from 0 V to 12 V
IN
6.2 Line/Load Regulation and Efficiency Measurement Procedure
1. Set up the TPS53128EVM-620 per
2. Start up the TPS53128EVM-620 per
3. Adjust V
to desired value between 8 V
IN
4. Adjust LOAD1/LOAD2 to desired load between 0 A and 4 A
5. Read input voltage, output voltage, and input current from V1, V2/V3, and A1, respectively.
6. Shut down TPS53128EVM-620 per
6.3 Output Ripple Voltage Measurement Procedure
1. Set up the TPS53128EVM-620 per
2. Start up the TPS53128EVM-620 per
3. Adjust V
to desired value between 8 V
IN
4. Adjust LOAD1/LOAD2 to desired load between 0 A and 4 A
5. Connect the oscilloscope probe to TP8 and TP4 for V
4-1.
6. Measure output ripple.
7. Shut down the TPS53128EVM-620 per
6.4 Shutdown Procedure
1. Set SW1 to DIS.
2. Set SW2 to DIS.
3. Decrease LOAD1 to 0 A and shut down LOAD1.
4. Decrease LOAD2 to 0 A and shut down LOAD2.
5. Decrease V
to 0 V and shut down V
IN
6. Shut down the fan.
10
TPS53128 Buck Controller Evaluation Module User's Guide
, it is advisable to limit the source current from V
IN
is initially set to 0 V.
IN
Figure 5-1
and turn it on, making sure air is flowing across the EVM.
.
DC
Section
5.2.
Section
6.1.
and 22 V
DC
Section
6.4.
Section
5.2.
Section
6.1.
and 22 V
DC
Section
6.4.
.
IN
Copyright © 2022 Texas Instruments Incorporated
.
DC
.
DC
.
DC
.
DC
, or TP7 and TP6 for V
OUT1
SLVU433A – FEBRUARY 2011 – REVISED JANUARY 2022
www.ti.com
to 3.0 A
IN
DC
is applied.
IN
as shown in
Figure
OUT2
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