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MB39A114 - DC/DC Converter IC

General Description

The MB39A114 is a DC/DC converter IC of pulse width modulation (PWM) type for charging, capable of independently controlling the output voltage and output current.

It is suitable for down conversion.

Key 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 volt.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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FUJITSU MICROELECTRONICS DATA SHEET DS04-27241-1Ea ASSP for Power Supply Applications (Secondary battery) DC/DC Converter IC for Charging Li-ion Battery MB39A114 ■ DESCRIPTION The MB39A114 is a DC/DC converter IC of pulse width modulation (PWM) type for charging, capable of independently 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. ■ FEATURES • Built-in constant current control circuit in 2-system.