J6
Enabled
Disabled
J6
J9
AUX
Power
Adapter
Power
Cable
Powering Up the EVM
TI recommends a power adaptor that is a standard 2.1-mm DC power adaptor with a negative tip that can
support 5 V and 3 A. An example of a power adaptor to use is the Triad Magnetics WSU050-3000-R wall
power supply.
When using the four-cable input power source, make sure to stay within the specified voltage limits for
each port listed in the data sheet.
4.1
Measuring TPS25810 Power Consumption
The TPS25810 is powered through the AUX pin while the IN1 and IN2 lines directly power the OUT pin of
the device. Therefore an easy way to measure the power consumption is to connect an ammeter to
jumper J9.
shows how to connect the ammeter to the AUX pin and to either the power adaptor or
the power cable (depending on how the EVM is powered).
When no device is connected to the USB port on the EVM, the TPS25810 only consumes 5
μ
A. To test
this have the ammeter connected properly to jumper J9, remove jumper on J1 to disconnect the LEDs,
and make sure nothing is connected to the output of the TPS25810.
Figure 4. Connecting the Ammeter to AUX Pin and Power Source
5
Enabling and Configuring the TPS25810
5.1
Enabling and Disabling the TPS25810
The TPS25810 has an enable pin that creates a convenient way to turn on or turn off the device without
interrupting the power source. On the TPS25810EVM-745 the TPS25810 can be enabled and disabled
using jumper J6. See
for enable and disable positions for jumper J6.
Figure 5. How to Enable and Disable the TPS25810 on the EVM
6
TPS25810EVM-745 User's Guide
SLVUAI0A – September 2015 – Revised September 2015
Copyright © 2015, Texas Instruments Incorporated
