PDF LX2202 Data sheet ( Hoja de datos )

Número de pieza	LX2202
Descripción	2A Li-Ion Linear Charger and Power Control
Fabricantes	Microsemi Corporation
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No Preview Available ! LX2202 TM ® 2A Li-Ion Linear Charger and Power Control PRODUCTION DATA SHEET DESCRIPTION The LX2202 Linear Battery Charger is a multi-state (2 stage) Li-Ion battery charger (Constant current / Constant voltage) that is designed to minimize battery charge time (even from current limited sources such as USB) and provide a simplified interface to control battery discharge. LX2202 features up to 2A charging current from an AC adapter and an isolated battery topology to minimize charge time from current limited sources such as USB. A thermal control loop maintains a safe operating temperature at all times. The LX2202 provides a seamless complete battery interface. When the input power source is removed, the LX2202 provides the discharge path for the battery with extremely low discharge impedance. This eliminates the need for external discharge switch and voltage supervisors. In USB mode, the LX2202 provides three levels of current limit: 100mA, 500mA, and off. The LX2202 (compared to the LX2201) has improved charge and discharge mode detection circuitry. A UVLO feature prevents battery charging when VDD is less than 3.6V. The LX2202 uses three resistors to program the constant charge current level, for setting the termination charge current, and for varying the USB charge current limits. LX2202 support two types of Li-Ion battery chemistry; 4.1V and 4.2V through logical input (VM pin). The LX2202 provides a charging status indicator. The LX2202 features a pre-charge conditioning mode for batteries that have been deeply discharged and also has a top off charge mode for batteries that are left on the charger for extended periods. The LX2202 is available in a high power 4mm x 4mm, 20-pin MLP, surface mount package. IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com KEY FEATURES Up to 2A Charge Current Internal Pass Element Can Function as a Reverse Direction Load Switch USB Compliant Charging States using optional USB input Isolated Battery Topology Low RdsON in Discharge Mode Full Capacity Charging True Charge Indicator Wall Supply Regulator Tolerance 5V + 10% Topping Charge with Voltage Monitoring Mode Improved charge/discharge mode detection circuitry Small, High Power 20-lead MLP package Selectable Li-Ion Battery for 4.1V or 4.2V Applications APPLICATIONS Batteries up to 4AH Ratings (C/2) Cell Phones PDAs Charging Cradles Digital Cameras Low Cost Single Li-Ion Cell Chargers Power On/Off Main Internal Power Bus Wall Adapter B220 10µF PRODUCT HIGHLIGHT VDD NU VDD BAT VDD LX2202 BAT VDD BAT USB CMP 2.55k 105k 72.3k 0.1µF To VDD 10µF Charge Indicator 2.49k VID0 0 0 1 1 VID1 0 1 0 1 State Select Truth Table VDD > VBAT Switch open – charging VBAT > VDD Switch open – discharge disabled. disabled. Charging – USB high level if Switch open – discharge using USB. disabled. Charging – USB low level if using USB. Charging – USB high level if using USB. Battery Discharging. MOSFET fully enhanced with current flow VBAT to VDD. Battery Discharging. MOSFET fully enhanced with current flow VBAT to VDD. PACKAGE ORDER INFO TA(°C) Plastic MLP LQ 4x4mm 20-Pin RoHS Compliant / Pb-free -40 to 125 LX2202CLQ Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX2202CLQ-TR) Copyright © 2004 Rev. 1.0, 2005-03-18 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 1 page LX2202 TM ® 2A Li-Ion Linear Charger and Power Control PRODUCTION DATA SHEET APPLICATION CIRCUITS LX2202 CONTROL FLOW DIAGRAM START RETURN TO START IF VSYS > VBAT, UVLO OR EN CHANGE STATE. UVLO YES NO VSYS > VBAT NO YES VID0 = 1 YES NO VID1= 1 YES NO NO CONDITION VBAT>60% CHARGE MODE YES CONSTANT CURRENT CHARGE MODE USB PROG DETERMINED BY THE STATE OF VID1. TEMP < 140 YES NO IUSB < PROG YES NO REDUCE CHARGE CURRENT REDUCE CHARGE CURRENT NO VBAT> VCV YES CONSTANT VOLTAGE CHARGE MODE EN = HI NO YES D IS C H A R G E MODE SW ITCH OFF TEMP < 140 YES NO IUSB < PROG YES NO NO IBAT<IMIN YES VOLTAGE M O N IT O R IN G MODE (STATE). REDUCE CHARGE CURRENT REDUCE CHARGE CURRENT VBAT<97% YES NO RETURN TO THE TOP OF THE CHART. Figure 2 – Control Flow Diagram Copyright © 2004 Rev. 1.0, 2005-03-18 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 5 Page LX2202 TM ® 2A Li-Ion Linear Charger and Power Control PRODUCTION DATA SHEET PACKAGE DIMENSIONS LQ 20-Pin MLPQ Plastic 4x4mm (114x114DAP) D E A1 A3 b MILLIMETERS INCHES L Dim MIN MAX MIN MAX A 0.80 1.00 0.031 0.039 A1 0.00 0.05 0.000 0.002 D2 A3 0.20 REF 0.008 REF b 0.18 0.30 0.007 0.088 D 4.00 BSC 0.157 BSC D2 2.59 2.79 0.102 0.110 E2 E 4.00 BSC 0.157 BSC E2 2.59 2.79 0.102 0.110 e e 0.50 BSC 0.019 BSC L 0.30 0.50 0.011 0.019 A Copyright © 2004 Rev. 1.0, 2005-03-18 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 11 11 Page

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