BQ25302 datasheet(24/38 Pages) TI

Part #	BQ25302

Description	BQ25302 Standalone 1-Cell 2.0-A Buck Battery Charger

PDF	38 Pages

Scroll/Zoom	100%

Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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24 / 38 page

9.2.2 Typical Application with External Power Path

In the case where a system needs to be immediately powered up from VBUS when the battery is overdischarged

or dead, the application circuit shown in Figure 9-6 can be used to provide a power path from VBUS/PMID to

VSYS. PFET Q4 is an external PFET that turns on to supply VSYS from the battery when VBUS is removed;

PFET Q4 turns off when VBUS is plugged in and VSYS is supplied from VBUS/PMID.

2.2 …F

REGN

47 nF

VSYS

10 µF

REGN

10 …F

VBUS

REGN

STAT

ICHG

GND

PMID

BAT

PGND

BTST

VBUS

Figure 9-6. Typical Application Diagram with Power Path

9.2.2.1 Design Requirements

For design requirements, see Section 9.2.1.1.

BQ25302

SLUSCZ3 – OCTOBER 2020

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BQ25302 Datasheet(PDF) 24 Page - Texas Instruments