5.3 Power Supply Setup

A bench-top DC power supply is needed to power up the EVM. For full-load testing of the TPS65653Q1EVM, a DC-power supply capable of at least 8 A and 4 V is required. 4 A is suggested as a practical minimum for partial load. The power supply is connected to the EVM using connector J4. The power supply and cabling must present low impedance to the UUT; the length of power supply cables must be minimized. Remote sense, using connector J8, can be used to compensate for voltage drops in the cabling.

With the power supply disconnected from the EVM, set the supply to 3.7-V DC and the current limit to 4 A, minimum. Set the power supply output OFF. Connect the positive terminal (+) of the power supply to VIN and negative terminal (–) to GND on the EVM (J5 power-in terminal block). Check that jumpers on the board are set as shown in (factory default jumper configuration).

Set power supply output ON, and then continue with the following steps:

1. Click on Assert EN check box. See marking 1 in Figure 3..
2. Click on Read Registers button (marking 2 in Figure 3). User should see “I2C Status: ready” message on the green background next to the Read Registers button.

The EVM is now ready for testing with default register settings loaded.