MB39A119 Datasheet, PDF (1/53 Pages) Fujitsu Component Limited. – DC/DC Converter IC of Synchronous Rectification for charging Li-ion battery

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27247-2E
ASSP for Power Supply Applications (Secondary battery)
DC/DC Converter IC of Synchronous
Rectification for charging Li-ion battery
MB39A119
■ DESCRIPTION
The MB39A119 is the N-ch MOS drive of the synchronous rectification type DC/DC converter IC using pulse-
width modulation (PWM) type that can charge Li-ion battery from 1 cell to 4 cells and suitable for down-conversion.
This IC integrates built-in comparator for the voltage detection of the AC adapter and switches the power supply
to the AC adapter or battery automatically, enabling supply it to system. In addition, the constant voltage control
state detection function is built in, which prevents mis-detecting the full charge. The MB39A119 provides a wide
range of power supply voltage and low standby current, high efficiency, making it ideal for use as a built-in charge
device in products such as notebook PC.
■ FEATURES
• High efficiency : 97 % (Max)
• High-frequency operation : 1 MHz (Max)
• Built-in off time control function
• Built-in voltage detection function of AC adapter (ACOK, XACOK terminal)
• Preventing mis-detection for the full charge by the constant voltage control state detection function (CVM
terminal)
■ PACKAGE
(Continued)
28-pin plastic QFN
(LCC-28P-M10)
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