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ZHCSFL8C October 2016 – August 2021 TPS65983B

PRODUCTION DATA

封裝選項

機械數(shù)據(jù) (封裝 | 引腳)

ZBH|96
- MPBGAL7A

散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)

訂購信息

9.3.2.1 Configured as a DFP

When configured as a DFP, the TPS65983B detects when a cable or a UFP is attached using the C_CC1 and C_CC2 pins. When in a disconnected state, the TPS65983B monitors the voltages on these pins to determine what, if anything, is connected. Refer to the USB Type-C Specification for more information.

Table 9-1 shows the high-level detection results. Refer to the USB Type-C Specification for more information.

Table 9-1 Cable Detect States for a DFP

C_CC1	C_CC2	CONNECTION STATE	RESULTING ACTION
Open	Open	Nothing attached	Continue monitoring both C_CC pins for attach. Power is not applied to VBUS or VCONN until a UFP connect is detected.
Rd	Open	UFP attached	Monitor C_CC1 for detach. Power is applied to VBUS but not to VCONN (C_CC2).
Open	Rd	UFP attached	Monitor C_CC2 for detach. Power is applied to VBUS but not to VCONN (C_CC1).
Ra	Open	Powered Cable/No UFP attached	Monitor C_CC2 for a UFP attach and C_CC1 for cable detach. Power is not applied to VBUS or VCONN (C_CC1) until a UFP attach is detected.
Open	Ra	Powered Cable/No UFP attached	Monitor C_CC1 for a UFP attach and C_CC2 for cable detach. Power is not applied to VBUS or VCONN (C_CC1) until a UFP attach is detected.
Ra	Rd	Powered Cable/UFP Attached	Provide power on VBUS and VCONN (C_CC1) then monitor C_CC2 for a UFP detach. C_CC1 is not monitored for a detach.
Rd	Ra	Powered Cable/UFP attached	Provide power on VBUS and VCONN (C_CC2) then monitor C_CC1 for a UFP detach. C_CC2 is not monitored for a detach.
Rd	Rd	Debug Accessory Mode attached	Sense either C_CC pin for detach.
Ra	Ra	Audio Adapter Accessory Mode attached	Sense either C_CC pin for detach.

When the TPS65983B is configured as a DFP, a current IH_CC is driven out each C_CCn pin and each pin is monitored for different states. When a UFP is attached to the pin, a pulldown resistance of Rd to GND will exist. The current IH_CC is then forced across the resistance Rd generating a voltage at the C_CCn pin.

When configured as a DFP advertising Default USB current sourcing capability, the TPS65983B applies IH_CC_USB to each C_CCn pin. When a UFP with a pulldown resistance Rd is attached, the voltage on the C_CCn pin will pull below VH_CCD_USB. The TPS65983B can also be configured as a DFP to advertise default (500 mA), 1.5 A and 3 A sourcing capabilities.

When the C_CCn pin is connected to an active cable VCONN (power to the active cable), the pulldown resistance will be different (Ra). In this case, the voltage on the C_CCn pin will pull below VH_CCA_USB/1P5/3P0 and the system will recognize the active cable.

The VH_CCD_USB/1P5/3P0 thresholds are monitored to detect a disconnection from each of these cases respectively. When a connection has been recognized and the voltage on the C_CCn pin rises above the VH_CCD_USB/1P5/3P0 threshold, the system will register a disconnection.