FUSB307B datasheet(13/57 Pages) ONSEMI

Part #	FUSB307B

Description	USB Type-C Port Controller with USB-PD

PDF	57 Pages

Scroll/Zoom	100%

Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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13 / 57 page

FUSB307B

www.onsemi.com

Voltage Transitions

The FUSB307B device can control a vSafe5V path via its

SRC output.

Figure 12. Transition to vSafe5V on Power Up

Power Up

Read

ALERT

Enable SRC path

SRC = High

FUSB307B

TCPM

Sourcing Disabled

PWRSTAT.SOURCE_VBUS = 0b

PWRSTAT.SOURCE_HV = 0b

SRC = Low

SRC_HV = Low

Prepare device to source vSafe5v

Write:

PWRCTRL.DIS_VALARM = 1b

PWRCTRL.AUTO_DISCH = 0b

Voltage Transition Complete

Set PWRSTAT.SOURCE_VBUS =1b

Set ALERT.I_PORT_PWR = 1b

Enable vSafe5v Source

Write COMMAND.SourceVbusDefaultVoltage

VBUS > vSafe5V(min)?

Notify Policy Engine that voltage

transition is complete

Transition to vSafe5v Path on Power up

Sourcing vSafe5V

ALERT.I_PORT_PWR=1b?

Service other

ALERTS

Read ALERT

Read PWRSTAT

Yes

Enable Auto Discharge

PWRCTRL.AUTO_DISCH = 1b

FUSB307B Datasheet(PDF) 13 Page - ON Semiconductor