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bq24705

Texas Instruments
Part Number bq24705
Manufacturer Texas Instruments
Description Host-Controlled Multi-Cell Battery Charger
Published Jan 10, 2020
Detailed Description Not Recommended for New Designs bq24705 www.ti.com.......
Datasheet PDF File bq24705 PDF File

bq24705
bq24705

Overview
Not Recommended for New Designs bq24705 www.
ti.
com.
.
.
SLUS779B – DECEMBER 2007 – REVISED MARCH 2009 600-kHz, Host-Controlled Multi-Cell Battery Charger With Input Overvoltage Protection FEATURES 1 •2 NMOS-NMOS Synchronous Buck Converter with 600 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 – 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+, NiCd, NiMH, Lead Acid, etc.
• Charge Enable • 10-µA Off-State Battery Current • 24-pin, 4x4-mm QFN Package APPLICATIONS • Notebook and Ultra-Mobile Computers • Portable Data-Capture Terminals • Portable Printers • Medical Diagnostics Equipment • Battery Bay Chargers • Battery Back-Up Systems DESCRIPTION The bq24705 is a high-efficiency, synchronous battery charger with integrated compensation, offering low component count for space-limited multi-chemistry battery charging applications.
Charge current and voltage programming allows high regulation accuracies, and can be either hardwired with resistors, or programmed by the system power-management microcontroller using a DAC ...


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