Instant Quote

Home > Integrated Circuits ICs > BQ24045DSQR

BQ24045DSQR

1A Li-Ion charger, 4.35V high-voltage chemistry, WSON-10, JEITA

5657

Effective Inventory
Go to Inquiry

Image for reference only

Manufacturer Part：

BQ24045DSQR

Package：

WSON-10 (DSQ), 2.0 x 2.0 x 0.75 mm

Brand：
Product Categories：
Quality Commitment
Shipping & Payment
Service & Packaging
Product Manual
Other recommendations you may be interested in.

STM32L072RBT6

TPS65217CRSLR

SN74HC273NSR

ADE7953ACPZ-RL

SN74HC138N

ATMEGA328-AU

AD826ARZ-REEL7

TPA0211DGNR

Description

Product Overview

The BQ24045DSQR from Texas Instruments is a 1A single-input single-cell Li-Ion and Li-Polymer battery charger in a compact WSON-10 (2.0 x 2.0 mm) package. It features 4.35V high-voltage chemistry support, JEITA temperature monitoring, programmable termination, and IEC 62368-1 safety certification. The device operates from a USB port or AC adapter with input overvoltage protection up to 30V.

Key Specifications

Battery Chemistry Li-Ion / Li-Polymer (4.35V high-voltage)
Charge Current Up to 1A (programmable via resistor)
Charge Voltage 4.35V with 1% accuracy
Input Voltage Range 3.5V to 28V operating, 30V max rating
OVP Threshold 6.6V
Safety Timer 10 hours fixed
Operating Temperature 0°C to +125°C (junction)
Package WSON-10 (DSQ), 2.0 x 2.0 x 0.75 mm

Features

  • 1% charge voltage accuracy for 4.35V high-voltage chemistry
  • Programmable precharge and termination threshold
  • JEITA-compatible NTC temperature monitoring
  • Input overvoltage protection (6.6V threshold)
  • Input voltage dynamic power management (VIN-DPM)
  • Thermal regulation at 125°C, thermal shutdown at 150°C
  • Charge status output (CHG pin) and power-good indicator (PG)
  • IEC 62368-1 CB certified

Applications

  • TWS headsets and earbuds
  • Smartwatches and fitness trackers
  • Wireless speakers and portable audio
  • Mobile POS terminals
  • Portable medical devices

The BQ24045DSQR from Texas Instruments is a highly integrated linear battery charger designed for single-cell Li-Ion and Li-Polymer batteries with 4.35V high-voltage chemistry support. It integrates a complete charging solution in a tiny 2 x 2 mm WSON-10 package, including power FETs, current sensing, and charge status indication. The device supports USB 100mA/500mA input current limiting and features programmable fast-charge and termination currents via external resistors. JEITA-compatible NTC monitoring adjusts charging behavior based on battery temperature, while IEC 62368-1 certification provides safety assurance for consumer applications.

The BQ24045DSQR charges the battery in three phases: precharge (conditioning), constant current (fast charge), and constant voltage. In the precharge phase, a reduced current is applied to deeply discharged batteries. When the battery voltage rises above the precharge threshold, the device transitions to the constant-current phase where the fast-charge current is regulated via the ISET resistor. Once the battery reaches 4.35V, the constant-voltage phase begins and the charge current gradually decreases. When the current drops below the programmable termination threshold, charging stops and the CHG pin indicates completion. The TS pin monitors battery temperature through an NTC thermistor, implementing JEITA guidelines that reduce charge current at cold temperatures and limit voltage at hot temperatures. The integrated VIN-DPM feature reduces charge current if the input voltage drops, preventing USB port voltage collapse.

Pin Name Type Function
1 IN Power Input supply (USB/adapter, 3.5-28V)
2 ISET Analog Fast-charge current set resistor
3 VSS Power Ground
4 PRE-TERM Analog Precharge/termination threshold set resistor
5 PG Output Power-good open-drain output
6 NC – No connect
7 ISET2 Input USB 100mA/500mA current limit select
8 CHG Output Charge status open-drain output
9 TS Input Battery NTC thermistor input (JEITA)
10 OUT Power Battery charge output / system connection
  • TWS earbuds and headsets requiring compact charger with 4.35V chemistry
  • Smartwatches and fitness bands with USB charging
  • Wireless speakers and portable audio devices
  • Mobile POS terminals and handheld scanners
  • Portable medical devices with safety certification requirements
Manufacturer Part Number Package Notes
TI BQ24040DSQR WSON-10 4.20V standard chemistry version
TI BQ24041DSQR WSON-10 4.20V with auto-start function
TI BQ25120AYFPR DSBGA-9 Smaller package, ship mode feature
Microchip MCP73831T-2ACI/OT SOT-23-5 4.35V, 500mA, simpler charger
onsemi NCP511SN33T1G TSOP-5 3.3V, 150mA, low IQ
Recommend Parts

TPS65217CRSLR

PMIC for AM335x, 3 bucks, 2 LDOs, battery charger, WLED, I2C, VQFN-48

Brand:

Package:

VQFN-48 (6×6 mm, 0.4 mm pitch)
In stock:
8909pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

SN74HC273NSR

Octal D-type flip-flop, edge-triggered, async clear, 28MHz, SOP-20

Brand:

Package:

SOP-20 (NS) (12.6×7.8 mm)
In stock:
8359pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

SN74HC138N

3-to-8 decoder/demux, active-low outputs, 3 enable inputs, 15ns, PDIP-16

Brand:

Package:

PDIP-16 (24.33×9.4 mm, Through-Hole)
In stock:
11952pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

TPA0211DGNR

2W mono Class-AB audio amp, BTL speaker + SE headphone, 2.5-5.5V, HVSSOP-8

Brand:

Package:

HVSSOP-8 (DGN) (3.0×4.9 mm, PowerPAD)
In stock:
3337pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

DP83848CVVX/NOPB

10/100 Ethernet PHY, MII/RMII/SNI, Auto-MDIX, 270mW, LQFP-48, commercial

Brand:

Package:

LQFP-48 (7×7 mm)
In stock:
14754pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

SN74HC245PWR

Octal bus transceiver, 3-state outputs, 2-6V, 12ns tpd, TSSOP-20

Brand:

Package:

TSSOP-20 (6.5×6.4 mm)
In stock:
2638pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry
Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Company
insights
Industries
All Products
Integrated Circuits
C&I Devices
Discrete
Memory Chips
MPUs & MCUs