1 Features

• 90% High Efficiency Switch Mode 3-A Charger

• 3.9-V to 6.2-V Single Input USB-Compliant

Charger with 6.4-V Over-Voltage Protection

– USB Host or Charging Port D+/D- Detection

Compatible to USB Battery Charger Spec

(BC1.2)

– Support Non-Standard 2-A/1-A Adapters

Detection

– Input Voltage and Current Limit Supports

USB2.0 and USB 3.0

– Input Current Limit: 100 mA, 150 mA, 500 mA,

900 mA, 1 A, 1.5 A, 2 A, and 3 A

• Synchronous Boost Converter in Battery Boost

Mode with

– Adjustable Output 4.55 V – 5.5 V at 1.5 A

– 90% 5.1-V Boost Mode Efficiency

– Fast OTG Startup (22 ms Typ)

• Narrow VDC (NVDC) Power Path Management

– Instant System On with No Battery or Deeply

Discharged Battery

– Ideal Diode Operation in Battery Supplement

Mode

• 1.5-MHz Switching Frequency for Low Profile 1.2-

mm Inductor

• I2C Port for Optimal System Performance and

Status Reporting

• Autonomous Battery Charging with or without

Host Management

– Battery Charge Enable

– Battery Charge Preconditioning

– Charge Termination and Recharge

• High Accuracy

– ±0.5% Charge Voltage Regulation

– ±7% Charge Current Regulation

– ±7.5% Input Current Regulation

– ±3% Output Voltage Regulation in Boost Mode

• High Integration

– Power Path Management

– Synchronous Switching MOSFETs

– Integrated Current Sensing

– Bootstrap Diode

– Internal Loop Compensation

• Safety

– Battery Temperature Sensing for Charging and

Discharging in Boost Mode

– Battery Charging Safety Timer

– Thermal Regulation and Thermal Shutdown

– Input and System Over-Voltage Protection

– MOSFET Over-Current Protection

• Charge Status Outputs for LED or Host Processor

• Maximum Power Tracking Capability by Input

Voltage Regulation

• 20-μA Low Battery Leakage Current and Support

Shipping Mode

• 4mm x 4mm VQFN-24 Package

2 Applications

• Power Bank for Smartphone, Tablet

• Portable Media Players

• Internet Devices

3 Description

The bq24295 is a highly-integrated switch-mode

battery charge management and system power path

management devices for 1 cell Li-Ion and Li-polymer

battery in a wide range of power bank, tablet and

other portable device applications.