Datasheet

PM8903A PM8903A demonstration board
Doc ID 024147 Rev 1 29/33
7.1.4 Test points and jumper connection
Use the following test points in order to measure the most important signals of the
PM8903A.
● VCC1 / VCC2: monitor the supply voltages
● VIN1 / VIN2: monitor the input voltages
● V_OUT_S1 / V_OUT_S2: monitor the output voltages (use these test points to perform
efficiency load-line regulation measurements)
● PGOOD1 / PGOOD2: (active high) monitor the regular functioning of the controllers
● 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.