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2.1.6
J6 –User Lamp module HV connections
2.1.7
J7 –User Lamp module HV Return connections
2.1.8
JP1 & JP2 – EVM Lamp disconnect
2.1.9
JP3 –I_PEAK
2.2
Setup and Operation With Onboard Lamp and Trigger Circuit
Setup
This connector is used to connect the EVM module to a user-supplied lamp and trigger circuit. Pin 1 of this
connector is the trigger signal. Pin 2 of this connector is the high-voltage side of the photo flash capacitor.
See the EVM schematic for more information
This connector is used to connect the EVM module to a user-supplied lamp and trigger circuit. Both pins
of this connector are connected to the negative side of the photo flash capacitor and provide the return
path for the flash currents.
These jumpers are used to disconnect the lamp and trigger circuit of the EVM so that a user-supplied
lamp and trigger can be evaluated. The lamp and trigger are disconnected when both jumpers JP1 and
JP2 are removed.
This connector is used to externally set the charge current. Pin 2 of this connector is tied directly to the
I_PEAK pin of the TPS65560. Connecting a jumper from pin 2 (I_PEAK) to pin 1 (V
CC
) configures the
TPS65560 to charge the flash capacitor using the maximum peak current. Connecting a jumper from pin 2
(I_PEAK) to pin 3 (GND) configures the TPS65560 to charge the flash capacitor using the minimum peak
current. Other peak current levels can be programmed by installing resistors in positions R6 and R7 on the
EVM board. R6 and R7 can be used to form a voltage divider between V
CC
and GND to set the voltage on
the I-Peak pin of the TPS65560.
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 that the voltage is close to zero before continuing
or touching any connectors or components.
2. If needed, install jumpers across JP1 and JP2 to connect the onboard lamp and trigger circuit to the
control circuitry.
3. 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.
4. Connect the negative lead of an input power supply to J4.
5. Connect the positive lead of a battery or power supply to J1. This voltage can be between 1.6 and 12
volts.
6. Connect the negative of the battery or power supply to J2.
7. Turn on the V
CC
input supply.
8. Turn on the battery voltage supply.
9. Push and hold the
Charge
button to start charging the flash capacitor.
10. Release the
Charge
button when the green
Charge Complete
LED (D2) illuminates.
11. Push the
Flash
switch to flash lamp.
12. Repeat steps 9 through 11 as needed.
SLVU155B – March 2006 – Revised March 2008
TPS65560EVM-165
3
