MB39A114 Datasheet, PDF (1/54 Pages) Fuji Electric – DC/DC Converter IC for Charging Li-ion Battery

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27241-1E
ASSP for Power Supply Applications (Secondary battery)
DC/DC Converter IC for Charging
Li-ion Battery
MB39A114
s DESCRIPTION
The MB39A114 is a DC/DC converter IC of pulse width modulation (PWM) type for charging, capable of inde-
pendently controlling the output voltage and output current. It is suitable for down conversion.
MB39A114 can dynamically control the secondary battery’s charge current by detecting a voltage drop in an AC
adapter to keep its power constant (dynamically-controlled charging) .
This IC can easily set the charge current value, making it ideal for use as a built-in charging device in products
such as notebook PC.
s FEATURES
• Built-in constant current control circuit in 2-system.
• Analog control of charge current value is possible. (+INE1 terminal and +INE2 terminal)
• Built-in AC adapter detection function (When VCC is lower than the battery voltage +0.2 V, output is fixed in the off.)
• Constant voltage control state detection function (CVM terminal) enables prevention of mis-detection for full
charge.
• Built-in overvoltage detection function (OVP terminal) of charge voltage
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s PACKAGE
24-pin plastic SSOP
(FPT-24P-M03)