Texas Instruments CSD87588N, Руководство пользователя

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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 J302 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 J302 to enable the controller.
6. Turn on the fan.
7. Vary load from 0-25 ADC, VOUT should remain in load regulation.
8. Vary VIN from 12 to 19 V, VOUT should remain in line regulation.
9. Decrease load to 0 A.
10. Put a jumper to short J302 to disable the controller.
11. Decrease V5VIN to 0 V.
12. Decrease VIN to 0 V.
5.2 List of Testpoints
Table 2. Function of Each Testpoint
Testpoints Name Description
TP301 5V 5V supply
TP302 GND GND for 5V supply
TP303 PGOOD Power good
TP304 Vins VIN supply
TP305 GND GND for VIN supply
TP306 SW Switch node
TP308 Vouts VOUT sense
TP309 GNDS GND sense
TP307 REFIN REFIN (Vout Setting)
TP310 GSNS Differential sensing (low)
TP311 VSNS Differential sensing (high)
5.3 Equipment Shutdown
1. Shut down the load.
2. Put the jumper on J302.
3. Shut down V5VIN and VIN.
6 High Power Density, Low Profile NexFET™ Power Block II for Notebook SLPU002A – February 2014 – Revised February 2014
Power Supply
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