Datasheet Texas Instruments BQ24704 — Datenblatt

Not Recommended for New Designs bq24704
www.ti.com. SLUS838 – MAY 2009 Low Cost, Host-Controlled Li-Ion and Li-Polymer Battery Charger With Low Iq
FEATURES APPLICATIONS 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
– Internal Loop Compensation
– Internal Soft-Start Safety
– Dynamic Power Management (DPM) with
Status Indicator
– Charger Overcurrent Protection
– Battery Overvoltage Protection
– Thermal Shutdown Supports Two, Three, or Four Li+ Cells 8 – 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 …