Texas Instruments bq2419x USB / Adapter Chargers

Texas Instruments bq2419x I²C Single-Cell USB / Adapter Chargers are highly-integrated switch-mode battery charge management and system power path management devices for single cell Li-Ion and Li-polymer batteries in a wide range of tablets and other portable devices.

The low impedance power path of these TI USB / adapter chargers optimizes switch-mode operation efficiency, reduces battery charging time, and extends battery life during discharging phase. The I²C serial interface with charging and system settings makes bq2419x USB / adapter cahrgers a truly flexible solution.

These TI devices support a wide range of input sources, including standard USB host port, USB charging port and high power DC adapter.

Features

High Efficiency 4.5A Switch Mode Charger
- 92% Charge Efficiency at 2A, 90% at 4A
- Accelerate Charge Time by Battery Path Impedance Compensation
Compatible with MaxLife Technology for Faster Charging When Used in Conjunction With bq27531
Highest Battery Discharge Efficiency with 12mΩ Battery Discharge MOSFET up to 9A Discharge Current
Single Input USB-compliant/Adapter Charger
- USB Host or Charging Port D+/D- Detection Compatible to USB Battery Charger Spec 1.2
- Input Voltage and Current Limit Supports USB2.0 and USB3.0
- Input Current Limit: 100mA, 150mA, 500mA, 900mA, 1.2A, 1.5A, 2A and 3A
3.9V to 17V Input Operating Voltage Range
- Support All Kinds of Adapter with Input Voltage DPM Regulation
USB OTG 5 V at 1.3A Synchronous Boost Converter Operation
- 93% 5V Boost Efficiency at 1A
Narrow VDC (NVDC) Power Path Management
- Instant-on Works with No Battery or Deeply Discharged Battery
- Ideal Diode Operation in Battery Supplement Mode
1.5MHz Switching Frequency for Low Profile Inductor

Autonomous Battery Charging with or without Host Management
- Battery Charge Enable
- Battery Charge Preconditioning
- Charge Termination and Recharge
High Accuracy (0°C to 125°C)
- ±0.5% Charge Voltage Regulation
- ±7% Charge Current Regulation
- ±7.5% Input Current Regulation
- ±2% Output Regulation in Boost Mode
High Integration
- Power Path Management
- Synchronous Switching MOSFETs
- Integrated Current Sensing
- Bootstrap Diode
- Internal Loop Compensation
Safety
- Battery Temperature Sensing and Charging Safety Timer
- Thermal Regulation and Thermal Shutdown
- Input System Over-Voltage Protection
- MOSFET Over-Current Protection
Charge Status Outputs for LED or Host Processor
Low Battery Leakage Current and Support Shipping
Mode
4.00mm × 4.00mm VQFN-24 Package