Datasheet > MB3879

MB3879

更新时间： 2024-01-22 11:11:27

品牌	Logo	应用领域
富士通 - FUJITSU		转换器电池
页数	文件大小	规格书
54页	547K
描述
DC/DC Converter IC for Parallel Charging of 3/4 cell Li-ion & NiMH Batteries

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MB3879 数据手册

FUJITSU SEMICONDUCTOR

DATA SHEET

DS04-27708-2E

ASSP for Power Supply Application (for secondary battery)

DC/DC Converter IC for Parallel Charging

of 3/4 cell Li-ion & NiMH Batteries

MB3879

■ DESCRIPTION

The MB3879 is a DC/DC converter IC for parallel charging of 3/4 cell Li-ion & NiMH batteries, which uses the

pulse-width modulation (PWM) for controlling output voltages and output currents independently.

This IC can dynamically control secondary batterie’s charge current, which detects voltage dropping in an AC

adapter in order to keep its power constant (Dynamically controlled charging). This operation allows quick charging

by variable charging current in accordance with operating status of a notebook PC.

Moreover, the total current of the system current and control IC input current are detected, and control of the

secondary battery is enabled.

An efficient charge becomes possible because of the charge current comes in changeability according to the

operation state of notebook PC by this operation.

TheICalsoallowsparallelchargingthatchargestwobatteriessimultaneously, reducingchargingtimedramatically.

The IC, using a built-in output voltage setting resistor, allows high-precision setting of output voltages. With its

output-voltage switching function that is ready for both graphite-type and coke-type Li-ion batteries as well as

NiMH battery, the IC is best suited to a built-in charger of a notebook PC.

This product is covered by US Patent Number 6,147,477.

■ FEATURES

• Detecting a voltage dropping in the AC adapter, and dynamically controlling the charge current (Dynamically-

controlled charging)

• Detecting total current of system current and control-IC input current (Differential-charging)

(Continued)

■ PACKAGE

48-pin plastic LQFP

(FPT-48P-M05)

12 3 4 5 6 7...54

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型号	品牌	描述	获取价格	数据表
MB3879PFV	FUJITSU	DC/DC Converter IC for Parallel Charging of 3/4 cell Li-ion & NiMH Batteries	获取价格
MB3879PFV	SPANSION	Battery Charge Controller, 0.7A, 500kHz Switching Freq-Max, PQFP48, PLASTIC, LQFP-48	获取价格
MB3881	FUJITSU	8-ch DC/DC Converter IC with Synchronous Rectifier for Voltage Step-up and Step-down	获取价格
MB3881PFF	FUJITSU	8-ch DC/DC Converter IC with Synchronous Rectifier for Voltage Step-up and Step-down	获取价格
MB3882	FUJITSU	2-channel DC/DC Converter IC with Synchronous Rectifier	获取价格
MB3882PFV	FUJITSU	2-channel DC/DC Converter IC with Synchronous Rectifier	获取价格