bq24705
bq24705 is Host-Controlled Multi-Cell Battery Charger manufactured by Texas Instruments.
FEATURES
- 2 NMOS-NMOS Synchronous Buck Converter with 600 k Hz Frequency and >95% Efficiency
- 30-ns Minimum Driver Dead-time and 99.5% Maximum Effective Duty Cycle
- High-Accuracy Voltage and Current Regulation
- ±0.5% Charge Voltage Accuracy
- ±3% Charge Current Accuracy
- ±3% Adapter Current Accuracy
- ±2% Input Current Sense Amp Accuracy
- Integration
- Internal Loop pensation
- Internal Soft-Start
- Safety
- Input Overvoltage Protection (OVP)
- Dynamic Power Management (DPM) with Status Indicator
- Supports Two, Three, or Four Li+ Cells
- 5
- 24 V AC/DC-Adapter Operating Range
- Analog Inputs with Ratiometric Programming via Resistors or DAC/GPIO Host Control
- Charge Voltage (4-4.512 V/cell)
- Charge Current (up to 8 A, with 10-mΩ
Sense Resistor)
- Adapter Current Limit (DPM)
- Status and Monitoring Outputs
- AC/DC Adapter Present with Programmable
Voltage Threshold
- DPM Loop Active (DPMDET)
- Current Drawn from Input Source
- Supports Any Battery Chemistry: Li+, Ni Cd, Ni MH, Lead Acid, etc.
- Charge Enable
- 10-µA Off-State Battery Current
- 24-pin, 4x4-mm QFN Package
APPLICATIONS
- Notebook and Ultra-Mobile puters
- Portable Data-Capture Terminals
- Portable Printers
- Medical Diagnostics Equipment
- Battery Bay Chargers
- Battery Back-Up Systems
DESCRIPTION...
