MB39A134 Datasheet | Fujitsu Semiconductor Limited

FUJITSU MICROELECTRONICS DATA SHEET DS04-27264-2E ASSP for Power Management Applications (Rechargeable Battery) DC/DC converter IC for Charging Li-ion battery - DESCRIPTION The MB39A134 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 charge voltage and current independently. MB39A134 has a A C adapter detection par ator i ndependent of the DC/DC con verter controller, and can control the source of po wer supply to a system. It suppor ts a wide input v oltage r ange, enables lo w current consumption in standby mode, and can control the charge voltage and charge current with high precision, which is perfect for the built-in Li-ion battery charger used in devices such as notebook PC. - Features - - - - - - Support 2, 3 and 4 Cell Battery Pack Built-in two constant current control loops Built-in AC adapter detection function (ACOK pin) Charge voltage accuracy : ±0.7% (Ta = - 10 °C to +85 °C) Built-in charging voltage control without external setting resistor (4.20 V/Cell or 4.10 V/Cell) Adjustable to charge voltage with external resistor Built-in two high accurate current detection amplifiers (±1%) (At input voltage difference 100 m V) (±5%) (At input voltage difference 20 m V) Input offset voltage : 0 m V (Current Amp1) : +3 m V (Current Amp2) Built-in Charging Current Control without external resistor (RS = 20 mΩ : 2.85 A) Adjustable charging current with external resistor Setting of switching frequency using an external resistor (Frequency setting capacitor integrated) : 100 k Hz to 2 MHz Built-in under voltage lockout protection In standby mode (Icc = 6 µA Typ) , only AC adapter detection function is operated Built-in VH regulator for reducing Qg loss of P-ch MOS FET Package : TSSOP-24 - - - - - - - APPLICATIONS - Built-in charger for Notebook PC - Handy terminal device etc. Copyright©2008 FUJITSU MICROELECTRONICS LIMITED All rights reserved 2008.9...