Texas Instruments TPS65988EVM, Руководство пользователя

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5.1.12 TP13 (5 V), TP8 (3.3 V), and TP12 (1.2 V)
Use the TP13, TP8, and TP12 test points to measure the output voltage of the onboard DC/DC converters.
These DC/DC converters produce the required voltage rails for full functionality of the EVM including power
delivery, powering internal and external circuits, and so forth. These test points allow the user to verify the
system supplies on the TPS65988EVM. LDO_1V8 is internally generated for internal circuitry. Use P3V3 to
supply VIN_3V3 which then supplies LDO_3V3. Also, use LDO_3V3 as a low-power output for external flash
memory. In bus-powered conditions, or self-powered conditions, P3V3 and LDO_3V3 are active. P3V3 has the
ability to operate at 4 V to compensate for IR drop through the USB Type-C cable. The P5V supply can operate
at 4.5 V at 100% duty cycle, but it is intended to supply the 5 V at 3 A when the barrel jack or system power is
connected to the EVM. P5V powers PP_CABLE for both ports as well as the VBUS current sense IC for both
ports.
Figure 5-27 highlights these test points.
Figure 5-27. TP13 (5 V), TP8 (3.3 V), and TP12 (1.2 V)
5.1.13 Aardvark
™
Connector (J10)
This connector matches the Total Phase
®
Aardvark that allows the user to access the I
2
C and SPI pins on the
TPS65988EVM using the SPI, I
2
C master, or both capabilities. Figure 5-28 and Figure 5-29 highlight theses
features.
Note
The FT4232 loads the I
2
C or SPI pins when powered. TI recommends leaving the FT4232 in reset by
having the Force Enable switches (switch 1 and switch 2) in the disabled (up) position.
Setup www.ti.com
20 TPS65988 Evaluation Module SLVUB62B – JUNE 2017 – REVISED NOVEMBER 2020
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