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.