PM8903 demonstration board

PM8903

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Doc ID 022748 Rev 1

7.1.4

Test points and jumper connection

Use the following test points in order to measure the most important signals of the PM8903.

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VCC1 / VCC2: monitor the supply voltages

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VIN1 / VIN2: monitor the input voltages

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V_OUT_S1 / V_OUT_S2: monitor the output voltages (use these test points to perform

efficiency load-line regulation measurements)

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PGOOD1 / PGOOD2: (active high) monitor the regular functioning of the controllers

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SYNCH1 / SYNCH2: these are usually shorted when two devices are synchronized

together

Unplug jumpers JP1 /JP2 in order to remove the power input voltage from device U1, device

U2, or both. Provide power supply voltage to one device at a time when performing

efficiency tests.

Turn on Dip-Switch SW1 in order to disable device U1, device U2, or both.