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2
Setup
2.1
Input / Output Connector Descriptions
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the TPS6105xEVM-141.
2.1.1
J1 –VIN
This is the positive input voltage connection to the converter. The EVM can be powered from any voltage
between 2.7 V and 5.5 V. The leads to the input supply should be twisted and kept as short as possible to
minimize EMI transmission and input voltage droop.
2.1.2
J2 –GND
This is the input return connection for the input power supply.
2.1.3
J3 –External Measurement or Control Connector
This connector is used to monitor the flash and enable inputs of the TPS6105x. An external controller can
also be connected to this connector to operate the EVM flash function. R11 and R12 should be removed
and left open if an external controller is used to control the EVM. The pin functions of J3 when using an
external controller are shown in
Pin 1 – EN: Output of timing circuit. Drives EN pin of the TPS6105x.
Pin 2 – FLASH: Output of timing circuit. Drives FLASH signal of TPS6105x. A low on this pin produces a
high-current flash.
Pin 3 – FLASH OFF: Input to timing circuit. A high on this pin immediately forces the TPS6105x to stop a
high-current flash. This pin can be used to interrupt or mask off a high-current flash. The state of this pin
does not effect the timing of the timing circuit.
Pin 4 – GND
Table 1. J3 Pin Functions
EN
(1)
FLASH OFF
(1)
FLASH
(1)
FUNCTION
L
X
X
OFF
H
L
H
MOVIE LIGHT
H
L
L
FLASH
H
H
H
MOVIE LIGHT
H
H
L
MOVIE LIGHT
(1)
X = don't care; L = 0 V; H = 1.8 V
2.1.4
JP1 –Torch Enable
JP1 is used to enable torch mode. Placing a shorting bar across pins 1 and 2 of JP1 turns the torch mode
on. In torch mode, the LED is constantly illuminated with an LED current of approximately 200 mA. If the
FLASH button is pushed, the LED flashes at the flash current limit of 700 mA and then returns to torch
mode after the flash time. If JP1 is left open, the LED is off. If the FLASH button is pushed with JP1 open,
then the LED flashes and returns to the off state after the flash time.
2
TPS61059EVM-141
SLVU150 – January 2006
