bq24751B

Not Recommended For New Designs bq24751B www.ti.com .......................................................................................................................................................... SLUS835A – JULY 2008 – REVISED MARCH 2009 Host-Controlled Multi-Chemistry Battery Charger with Low Iq and System Power Selector FEATURES 1 2 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 – Programmable Input Overvoltage Protection (OVP) – Dynamic Power Management (DPM) with Status Indicator – Programmable Inrush Adapter Power (ACOP) and Overcurrent (ACOC) Limits – Reverse-Conduction Protection Input FET 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 – Current Drawn from Input Source Battery Learn Cycle Control Supports Any B...