Setup
5.3
Getting Started Using the TPS65982-EVM
5.3.1
Powering the TPS65982-EVM
There are many viable options for providing power to the TPS65982-EVM. Sections
through
describe all of these options for powering the EVM.
5.3.1.1
Powering the EVM From J4
When a barrel jack plug of the appropriate voltage, size, and polarity is inserted in J4, all of the power rails
of the TPS65982-EVM (System_3V3, System_5V, and HV_Source) will automatically be generated by the
DCDC buck converters (U5, U6, and U7, respectively) from the External Power rail. When a shunt is
installed on J6, the External Power rail will also provide power to the PP_EXT FETs (Q1 and Q2).
5.3.1.2
Powering the EVM From J6
When a shunt is installed on J6 and a 20-V DC power supply is connected to either pin, the External
Power rail will generate all of the power rails for the TPS65982-EVM and will also provide power to the
PP_EXT FETs (Q1 and Q2).
5.3.1.3
Powering the EVM From J7 and J5
When J4 and J6 are not used and a Tiva LaunchPad is used, both shunts on Jumper J7 should be
installed to provide power to the System_3V3 and System_5V power rails of the TPS65982-EVM from a
LaunchPad’s 3.3-V and 5-V rails, labeled Tiva_3V3 and Tiva_5V. When power is provided by a
LaunchPad, 12 V can be supplied to the HV_Source rail by a DC power supply at pin 1 of J5.
5.3.1.4
Powering the EVM From J6 and J5
When J6 is not used to supply power to External Power and a LaunchPad is not used, the 20-, 12-, 5-,
and 3.3-V rails can all be supplied by a DC power supply. 20 V should be applied to PP_EXT at pin 2 of
J6, 12 V should be applied to HV_Source at pin 1 of J5, 5 V should be applied to System_5V at pin 2 of
J5, and 3.3 V should be applied to System_3V3 at pin 3 of J5.
5.3.1.5
Power the EVM from the USB Type-C Port
When a 0-
Ω
resistor is installed at R10 and R11, RPD_G1 and RPD_G2 are shorted to CC1 and CC2
respectively, and dead battery mode is supported by the TPS65982-EVM. Depending on the configuration
used (see
), the TPS65982-EVM will negotiate a USB PD contract for 5 V at 3 A, 12 V at 3 A,
12–20 V at 3 A, 20 V at 3 A, or 20 V at 5 A and will provide power to portions of the system depending on
whether the PP_EXT external FET or PP_HV internal FET is used to sink power.
NOTE:
When a USB PD contract is negotiated for 5 V, it is common for the LEDs to blink due to the
switching behavior of the buck converter U6, which produces the System_5V rail. When
blinking on the LEDs occurs, VBUS is stable at 5 V and can be measured on test point TP3.
5.3.2
Analyzing USB Type-C and PD Events Using the LEDs
When a USB Type-C cable is inserted into the USB Type-C receptacle (J1), the LEDs on the TPS65982-
EVM (D2–D9 described in
) can be used to interpret what type of event has
occurred and, in turn, what type of device is connected at the other end of the Type-C cable.
5.3.2.1
Cable Orientation (CC1 or CC2) Event
After a plug event (a correctly terminated USB Type-C cable has been connected with a USB Type-C
product on the opposite end of the cable) has occurred, cable orientation detection of the USB Type-C
cable will occur. When cable orientation detection has completed, this event will occur and either LED D2
(
CC1
) or LED D3 (
CC2
) will turn ON to indicate that the cable is inserted right-side up (
CC1
ON and
CC2
OFF) or upside-down (
CC2
ON and
CC1
OFF).
11
SLVUAF8C – June 2015 – Revised November 2015
TPS65982 Evaluation Module
Copyright © 2015, Texas Instruments Incorporated
