MB39A114 Datasheet | Fujitsu Semiconductor Limited

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. - 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 (Continued) - PACKAGE 24-pin plastic SSOP (FPT-24P-M03) Copyright©2004-2008 FUJITSU MICROELECTRONICS LIMITED All rights reserved 2004.5 (Continued) - Wide range of operating power-supply voltage range : 8 V to 25 V - Built-in output setting resistor - Built-in switching function (SEL terminal) of output setting voltage 16.8 V or 12.6 V - Output voltage setting accuracy : ± 0.74% (Ta = - 10 °C to +85 °C) - Built-in high accuracy current detection amplifier : ± 5% (At the input voltage difference of 100 m V) , ± 15% (At the input voltage difference of 20 m V) - Output voltage setting resistor is open to enable prevention of invalidity current at IC standby (ICC = 0 µA Typ). - Oscillation frequency range : 100 k Hz to 500 k Hz - Built-in current detection Amp with wide in-phase input voltage range : 0 V to VCC - Built-in soft-start function independent of loads - Built-in standby current function : 0 µA (Typ) - Built-in totem-pole type output stage supporting Pch...