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2.3
Setup and Operation With User-Supplied Lamp and Trigger Circuit Operation
Setup
1. Discharge the photo flash capacitor by shorting C5 with a 15-k
Ω
resistor for over 20 seconds. Use a
multimeter to measure the voltage on C5 and verify the voltage is close to zero before continuing or
touching any connectors or components.
2. Remove jumpers across JP1 and JP2 to disconnect the onboard lamp and trigger circuit from the
control circuitry. The TPS65560 EVM should only be used to flash a single flash tube.
3. Connect the high-voltage portion of the user supplied lamp circuit to pin 2 of J6.
4. Connect the trigger portion of the user-supplied lamp to pin 1 of J6. See the EVM schematic to verify
the circuit hook up.
5. Connect the ground portion of the user lamp circuit to pin 1 of J7
6. Connect the positive lead of an input power supply J3. This voltage should be between 2.7 and 4 volts
dc to supply V
CC
to the TPS65560.
7. Connect the negative lead of an input power supply to J4.
8. Connect the positive lead of a battery or power supply to J1. This voltage can be between 1.6 and 12
volts.
9. Connect the negative of the battery or power supply to J2.
10. Turn on the V
CC
input supply.
11. Turn on the battery voltage supply.
12. Push and hold the
Charge
switch to start charging the flash capacitor.
13. Release
Charge
switch when the green
Charge Complete
LED (D2) illuminates.
14. Push the
Flash
switch to flash lamp.
Repeat steps 12 through 14 as necessary.
TPS65560EVM-165
4
SLVU155B – March 2006 – Revised March 2008
