TPS65982ABZBHR datasheet(38/121 Pages) TI1

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C_CCn

R_RPD

RD_DB

RPD_Gn

RD_CC

RD_DB_EN

RD_CC_EN

TPS65982

SLVSD02D – MARCH 2015 – REVISED JUNE 2019

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This resistance must be pin-strapped externally to configure the C_CCn pin to behave in one of two ways:

present an Rd pulldown resistance or present a Hi-Z when the TPS65982 is unpowered. During normal

operation, RD will be RD_CC; however, while dead-battery or no-battery conditions exist, the resistance is un-

trimmed and will be RD_DB. When RD_DB is presented during dead-battery or no-battery, application code will

switch to RD_CC.

Figure 19. C_CCn and RPD_Gn pins

When C_CC1 is shorted to RPD_G1 and C_CC2 is shorted to RPD_G2 in an application of the TPS65982,

booting from dead-battery or no-battery conditions will be supported. In this case, the gate driver for the pulldown

FET is Hi-Z at its output. When an external connection pulls up on C_CCn (the case when connected to a DFP

advertising with a pullup resistance Rp or pullup current), the connection through R_RPD will pull up on the FET

gate turning on the pulldown through RD_DB. In this condition, the C_CCn pin will act as a clamp VTH_DB in

series with the resistance RD_DB.

When RPD_G1 and RPD_G2 are shorted to GND in an application and not electrically connected to C_C1 and

C_CC2, booting from dead-battery or no-battery conditions is not possible. In this case, the TPS65982 will

present a Hi-Z on the C_CC1 and C_CC2 pins and a USB Type-C source will never provide a voltage on VBUS.

9.3.3 Port Power Switches

Figure 20 shows the TPS65982 port power path including all internal and external paths. The port power path

provides to VBUS from PP_5V0, provides power to or from VBUS from or to PP_HV, provides power to or from

an external port power node (shown and refered to as PP_EXT) from or to VBUS, and provides power from

PP_CABLE to C_CC1 or C_CC2. The PP_CABLE to C_CCn switches shown in Figure 20 are the same as in

Figure 10, but are now shown without the analog USB Type-C cable plug and orientation detection circuitry.

TPS65982ABZBHR Datasheet(PDF) 38 Page - Texas Instruments