User manual

Chapter 2

SLVU334–August 2009

Setup

This chapter describes the jumpers and connectors on the EVM, as well as how to properly connect, set

up, and use the TPS75105DSKEVM-529.

2.1 Input / Output Connector Descriptions

J1 – VIN

This is the positive input-voltage connection to the converter. The EVM operates from any supply 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.

J2 – GND

This is the input return connection for the input power supply.

JP1 – Bank-A Enable

JP1 is used to enable the bank-A LEDs. Place a shorting bar in the ON position to turn the bank-A LEDs

on. When the bank-A LEDs are enabled, the LED current through LEDs D1A and D2A is regulated to the

value programmed by R1 (up to 25 mA). Place a shorting bar in the OFF position to turn the bank-A LEDs

off.

JP2 – Bank-B Enable

JP2 is used to enable the bank-B LEDs. Place a shorting bar in the ON position to turn the bank-B LEDs

on. When the bank-B LEDs are enabled, the LED current through LEDs D1B and D2B is regulated to the

value programmed by R1 (up to 25 mA). Place a shorting bar in the OFF position to turn the bank-B LEDs

off.

JP3 – LED D1A Cathode Connection

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 may 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 – LED D2A Cathode Connection

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 may 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 – LED D1B Cathode Connection

JP5 is used to measure the current through LED D1B. Place a current meter between the pins of JP5 to

measure the current. Alternatively, a resistor may 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.

SLVU334–August 2009 Setup

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