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BQ24704RGERBQN/a296avaiLow Cost, Host-Controlled Li-Ion and Li-Polymer Battery Charger With Low Iq 24-VQFN -40 to 125
BQ24704RGETTI/BBN/a50avaiLow Cost, Host-Controlled Li-Ion and Li-Polymer Battery Charger With Low Iq 24-VQFN -40 to 125


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BQ24704RGER-BQ24704RGET
Low Cost, Host-Controlled Li-Ion and Li-Polymer Battery Charger With Low Iq 24-VQFN -40 to 125
1FEATURES
DESCRIPTION

ACP
PVCC
ACDET
ACSET
DPMDET
CELLS
SRP
SRN
BAT
CHGEN
ACN
SRSET 22 21 20 8 9 1011 12
AGND
VREF
ADJ
ISYNSET
IADAPT
BTST HIDR REGN LODR
PGND
bq24704
QFN - 24
TOP VIEW
bq24704
www.ti.com........................................................................................................................................................................................................
SLUS838–MAY 2009
Low Cost, and Charger With
Notebook and Netbook Computers NMOS-NMOS Buck Converter
with 300 kHz and >95% Efficiency
Portable Data-Capture Terminals Portable Printers 30-ns Minimum Dead-time and 99.5%
Maximum Effective Cycle
Medical Diagnostics Equipment Battery Bay Chargers High-Accuracy and Current Regulation Battery Back-Up Systems– ±0.5% Charge Accuracy ±3% Charge Accuracy ±3% Adapter Accuracy
The bq24704 is a high-efficiency, synchronous– ±2% Input Sense Amp Accuracy battery charger with integrated compensation offering• Integration low component count for space-limited Li-Ion and Internal Loop Li-Polymer battery charging applications. Charge
current and voltage programming allows high– Internal Soft-Start regulation accuracies, and can be either hardwired• Safety with resistors, or programmed by the system Dynamic (DPM) with power-management microcontroller usinga DACor
Status Indicator
GPIOs. Charger Protection The bq24704 charges two, three,or four series Li+
cells, supporting upto8Aof charge current, andis– Battery Overvoltage Protection
availableina 24-pin, 4x4-mm thin QFN package.– Thermal Supports Two,or Four Li+ Cells PACKAGE AND PIN-OUT 8–24V AC/DC-Adapter Operating Range Analog Inputs Programming
via Resistors Host Control Charge Voltage V/cell) Charge Currentto8A, with 10-mΩ
Sense Resistor) Adapter Current (DPM)
Status and Monitoring Outputs AC/DC Adapter with Programmable
Voltage Threshold DPM Loop (DPMDET) Current Drawn Input Source
Charge Enable 24-pin, 4x4-mm Package Energy Star <10 μA Off-state Discharge Current < 1.5 mA Input Quiescentbe aware thatan availability, standard warranty, and usein applicationsof Texas
Not Recommended for New Designs
ic,good price


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