深圳市科瑞芯电子有限公司

GMT/致新 G2279RE1U TDFN3x3-10 高效率，3A输出，同步降压器

General Description

The G2279 is a standalone linear Li-Ion battery charger with a complete trickle-charge, constant-current and constant-voltage charge loop. 

No external power MOSFET, sense resistor and blocking diode is required due to internal power MOSFET architecture. The charge voltage is regulated at 4.2V, and the charge current is programmable by an external resistor. The pre-charge current and termination current threshold are programmed via an external resistor on the G2279, the open drain NMOS /CHRG pin would be automatic weakly pull low and terminating the charge loop and /PG pin would be automatic strongly pull low at power ready.

Other features include under voltage lockout, automatic recharge, over temperature protection and acharge status indication pin.

Features

■ No External Power MOSFET, Sense Resistor orBlocking Diode Required

■ Programmable Termination and Pre-ChargeThreshold

■ Programmable Constant Charge Current Limitto 500mA

■ Automatic Recharge

■ Complete Pre-Charge, Constant Current, Constant Voltage and Charge Termination Charge Procedure with Thermal Regulation to Maximize Charge Rate without Risk of Overheating

■ Charges Single Cell Li-Ion Batteries Directly from USB Port

■ Preset 4.2V Charge Voltage with ±1% Accuracy

■ 10% Charge Current Accuracy

■ Internal Thermal Protection Circuit

Applications

■ MP3 Players

■ Cellular Phones

■ PDAs

■ Hand-Held Devices

G2279RE1U封装图

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