bq24750
www.ti.com.........................................................................................................
bq24750
www.ti.com............................................................................................................................................... SLUS735D – DECEMBER 2006 – REVISED MARCH 2009
Host-Controlled Multi-Chemistry Battery Charger With Integrated System Power Selector and AC Overpower Protection
FEATURES
1
NMOS-NMOS Synchronous Buck Converter with 300 kHz 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
– Automatic System Power Selection From AC/DC Adapter or Battery
– Internal Loop Compensation
– Internal Soft Start Safety
– Input Over
voltage Protection (OVP)
– Dynamic Power Management (DPM) with Status Indicator
– Programmable Inrush Adapter Power (ACOP) and Overcurrent (ACOC) Limits
– Reverse-Conduction Protection Input FET
– Battery Thermistor Sense Input (TS) for Charge Qualification
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 10 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
– Current Drawn from Input So...