RT7204E datasheet(31/45 Pages) RICHTEK

31 / 45 page

RT7204E

is a registered trademark of Richtek Technology Corporation.

RT7204E_DS-00

May 2024

www.richtek.com

15.6

Interface of CC1 and CC2

The CC1 and CC2 pins are used for compliance with the USB Type-C specification. When configured as a

Downstream Facing Port (DFP), three current capabilities of 80

A, 180A, and 330A, provided by each of the

CC pin, will be advertised to an Upstream Facing Port (UFP) as the default USB current, 1.5A, and 3.0A,

respectively. If the resistor Ra on the powered cable termination is detected, the VCONN power and switches can

be controlled by MCU with 100mW output capability during the identification of E-marked cable. The interface of

CC1 and CC2 is shown in Figure 4.

PD PHY

MCU

11-bit ADC

CC1/CC2

1.125V 3.25V

CCI

4.2V

VCN_SW

ICC_SRC

01: 80μA

10: 180μA

11: 330μA

Figure 4. Interface of CC1 and CC2

15.7

Open-Drain Driver of The VBUS Pin

Figure 5 shows the VBUS pin with the open-drain drivers. The internal bleeder circuit at the VBUS pin is used to

discharge the VBUS capacitor to Vsafe0V upon the detachment of a connected device. The VBUS pin voltage

provides real-time VBUS voltage detection by ADC, and the voltage between VDD and VBUS can be compared

to achieve VBUS drop protection.

VBUS

USBP

RVBUS_L

N-MOSFET

Driver

MCU

RVBUS1

RVBUS2

11-bit ADC

Figure 5. Open-Drain Driver of the VBUS Pin

RT7204E Datasheet(PDF) 31 Page - Richtek Technology Corporation

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