MB39A125 - Fujitsu

MB39A125 DC/DC Converter IC

MB39A125/126 is a DC/DC converter IC for charging Li-ion battery, which is suitable for down-conversion, and uses pulse width modulation (PWM) for controlling the output voltage and current independently. This IC integrates the build-in comparator for the voltage detection of the AC adapter, and selects the AC adapter or battery automatically for power suppl.

Features

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• High efficiency : 97% (MAX) Built-in two constant current control circuits Analog control of the charging current value (+INE1, +INE2 terminal) Built-in AC adapter voltage detection function (ACOK, XACOK terminal) (Continued)
■ PACKAGES 24-pin plastic SSOP 28-pin plastic QFN (FPT-24P-M03) (LCC-28P-M11) www.DataSheet4U.com www.DataSheet4U.com MB39A125/126 (Continued)
• External output voltage setting resistor : MB39A125
• Built-in output voltage setting resistor : MB39A126
• Built-in charge stop function at low VCC
• Output voltage setting accuracy : ± 0.74% (Ta = −10 °C to +85 °C.