Operation
3.3.1
Resistance Reading Current
This procedure is used to only measure the current of the TPL5111 in startup mode. An external power
supply set to 2.5V should be used for this measurement.
WARNING
The EVM should NOT be connected to the MSP430 Launchpad for
this measurement.
1. Disconnect the power source from the EVM. Set the S_ON_OFF switch to the V_BATT position.
2. Set the MODE_SW to the ONE SHOT position.
3. Remove the I_SEL jumper.
4. Connect the EVM, a power supply and a digital multi-meter (DMM) as shown in Figure 4. The output of
the power supply should be OFF. The DMM should support 6 digits of resolution.
5. Enable the output of the power supply. Ensure that it is set to 2.5V.
6. Set the S_ON_OFF switch of the EVM to AUX_VDD.
7. Press and hold the M_DRV switch.
8. The current measured by the DMM should be in the range of 330 µA to 400 µA.
10
TPL5111EVM User 's Guide
SNAU183 – July 2015
Copyright © 2015, Texas Instruments Incorporated
