BQ25302 Standalone 1-Cell 2.0-A Buck Battery Charger

1 Features

• Standalone charger and easy to configure

• High-efficiency, 1.2-MHz, synchronous switch-

mode buck charger

– 94.3% charge efficiency at 1A from 5-V input

• Single input to support USB input

– Support 4.1-V - 6.2-V input voltage range with

28-V absolute maximum input voltage rating

– Input Voltage Dynamic Power Management

(VINDPM) tracking battery voltage

• High integration

– Integrated reverse blocking and synchronous

switching MOSFET

– Internal input and charge current sense

– Internal loop compensation

– Integrated bootstrap diode

• 4.1-V / 4.2-V / 4.35-V / 4.4-V charge voltage

• 2.0-A maximum fast charge current

• 4-µA VBUS supply current in IC disable mode

• Charge current thermal regulation at 120°C

• Precharge current: 10% of fast charge current

• Termination current: 10% of fast charge current

• Charge accuracy

– ±0.5% charge voltage regulation

– ±10% charge current regulation

• Safety

– Thermal regulation and thermal shutdown

– Input Under-Voltage Lockout (UVLO) and Over-

Voltage Protection (OVP)

– Battery overcharge protection

– Safety timer for precharge and fast charge

– Charge disabled if current setting pin ICHG is

open or short

– Cold/hot battery temperature protection

– Fault report on STAT pin

• Available in WQFN 3x3-16 package

2 Applications

• Wireless speaker

• Barcode scanner

• Gaming

• Cradle charger

• Cordless power tool

• Building Automation

• Medical

3 Description

The BQ25302 is a highly-integrated standalone

switch-mode battery charger for single cell Li-Ion and

Li-polymer batteries. The BQ25302 supports 4.1-V to

6.2-V input voltage and 2-A fast charge. The

integrated current sensing topology of the device

enables high charge efficiency and low BOM cost.

The best-in-class 200-nA low quiescent current of the

device conserves battery energy and maximizes the

shelf time for portable devices. The BQ25302 is

available in a 3x3 WQFN package for easy 2-layer

layout and space limited applications.

Device Information

PART NUMBER(1)

PACKAGE

BODY SIZE (NOM)

BQ25302

RTE

3.00mm x 3.00mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

2.2 …F

2.2 …F

47 nF

REGN

10 …F

VBUS

REGN

REGN

ICHG

VSET

Thermal Pad

Q3

Q1

Q2

BAT

TS

PGND

BTST

SW

VBUS

2.2 …F

PMID

1 …+

Simplified Application

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BQ25302

SLUSCZ3 – OCTOBER 2020

Copyright © 2020 Texas Instruments Incorporated

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BQ25302

SLUSCZ3 – OCTOBER 2020

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.