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2.1.2 J2 – GND
2.1.3 JP1 – Bank-A Enable
2.1.4 JP2 – Bank-B Enable
2.1.5 JP3 – LED D1A Cathode Connection
2.1.6 JP4 – LED D2A Cathode Connection
2.1.7 JP5 – LED D2B Cathode Connection
2.1.8 JP6 – LED D1B Cathode Connection
2.2 Setup
2.2.1 EVM Factory Configuration
Setup
This is the input return connection for the input power supply.
JP1 is used to enable the bank-A LEDs. Place a shorting bar in the ON position to turn on the bank-A
LEDs. When the bank-A LEDs are enabled, the LED current through LEDs D1A and D2A is regulated to
the value programmed at ISET (5 mA). Place a shorting bar in the OFF position to turn off the bank-A
LEDs.
JP2 is used to enable the bank-B LEDs. Place a shorting bar in the ON position to turn on the bank-B
LEDs. When the bank-B LEDs are enabled, the LED current through LEDs D1B and D2B is regulated to
the value programmed at ISET (5 mA). Place a shorting bar in the OFF position to turn off the bank-B
LEDs.
JP3 is used to measure the current through LED D1A. Place a current meter between the pins of JP3 to
measure the current. Alternatively, a resistor can be connected between the pins of JP3 in order to
measure the current as a voltage. Place a shorting bar across the pins of JP3 if current measurement is
not required. PCB pads are provided to install a current-sense resistor across this jumper.
JP4 is used to measure the current through LED D2A. Place a current meter between the pins of JP4 to
measure the current. Alternatively, a resistor can be connected between the pins of JP4 in order to
measure the current as a voltage. Place a shorting bar across the pins of JP4 if current measurement is
not required. PCB pads are provided to install a current-sense resistor across this jumper.
JP5 is used to measure the current through LED D2B. Place a current meter between the pins of JP5 to
measure the current. Alternatively, a resistor can be connected between the pins of JP5 in order to
measure the current as a voltage. Place a shorting bar across the pins of JP5 if current measurement is
not required. PCB pads are provided to install a current-sense resistor across this jumper.
JP6 is used to measure the current through LED D1B. Place a current meter between the pins of JP6 to
measure the current. Alternatively, a resistor can be connected between the pins of JP6 in order to
measure the current as a voltage. Place a shorting bar across the pins of JP6 if current measurement is
not required. PCB pads are provided to install a current-sense resistor across this jumper.
The EVM is configured to provide the following nominal operating conditions:
Input voltage: 2.5 V to 5.5 V
LED current: 5 mA
TPS75105EVM 2 SLVU182 – September 2006
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