ZXCT1041 EV1
Zdb341R2. 26-Feb-07
5/8
ZXCT1041 EV1 User Guide Rev2
SET-UP AND TEST
The board is preset to give an output |Voltage of 1.5V for a load current of 1.5A (SL1 is shorted to connect in
the 100m
Ω
Ω
Ω
Ω
(R1) sense resistor). To change the board to give an output Voltage of 1.5V for a current of 6.0A,
de-solder SL1 and short SL2. This connects the 25m
Ω
Ω
Ω
Ω
(R2) sense resistor.
1.0 Ampere load test (forward current flow)
1. Ensure SL1 is shorted.
2. Connect a linear power supply of +15V between the V1 and GND terminals.
3. Set a load current of 1.5A between the V2 and GND terminals using a suitable load.
The load must be rated for at least 30W.
4. Check with a DVM the supply voltage is +15V between the V1 and GND terminals.
5. Measure VOUT with a DVM. The nominal output voltage should read 1.5V.
6. Measure the FLAG pin with a DVM, it should be High, approximately V1 15Vin this case.
1.0 Ampere load test (reverse current flow)
1. Ensure SL1 is shorted.
2. Connect a linear power supply of +15V between the V2 and GND terminals.
3. Set a load current of 1.5A between the V1 and GND terminals using a suitable load.
The load must be rated for at least 30W.
4. Check with a DVM the supply voltage is +15V between the V2 and GND terminals.
5. Measure VOUT with a DVM. The nominal output voltage should read 1.5V.
7. Measure the FLAG pin with a DVM, it should be logic Low, less than 200mV
The device may also be evaluated with lower power loads and lower currents by increasing the value of
R
sense.
As the device reacts only to the voltage across this resistor such tests are equally valid.
