Texas Instruments CSD87381PEVM-603, User Manual, Page: 6 / 19

Test Procedure
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5 Test Procedure
5.1 Line and Load Regulation and Efficiency Measurement Procedure
1. Ensure load is set to constant resistance mode and to sink 0 ADC.
2. Ensure a jumper is on J101 on the EVM to set the EVM at OFF position before VIN and V5VIN are
applied.
3. Increase VIN from 0 to 12 V. Using V1 to measure input voltage.
4. Increase V5VIN from 0 to 5 V. Using V2 to measure input voltage.
5. Remove the jumper on J101 to enable the controller.
6. Vary load from 0 to 15 ADC, VOUT should remain in load regulation.
7. Vary VIN from 12 to 19 V, VOUT should remain in line regulation.
8. Decrease load to 0 A.
9. Put a jumper to short J101 to disable the controller.
10. Decrease V5VIN to 0 V.
11. Decrease VIN to 0 V.
5.2 List of Testpoints
Table 2. Function of Each Testpoint
Testpoints Name Description
TP100 5V 5V supply
TP101 GND GND for 5V supply
TP102 PGOOD Power good
TP103 Vins VIN supply
TP104 GND GND for VIN supply
TP105 SW Switch node
TP107 Vouts VOUT sense
TP108 GNDS GND sense
TP106 REFIN REFIN (Vout Setting)
TP109 GSNS Differential sensing (low)
TP110 VSNS Differential sensing (high)
5.3 Equipment Shutdown
1. Shut down the load.
2. Put the jumper on J101.
3. Shut down V5VIN and VIN.
6 High Power Density, Low Profile NexFET™ Power Block II for Notebook SLPU003A – February 2014 – Revised February 2014
Power Supply
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