LX2203CLD-TR

LX2203 Li-Ion Battery Charger ® TM P RODUCTION D ATA S HEET KEY FEATURES DESCRIPTION ƒ ƒ ƒ ƒ ƒ ƒ Up to 1A charge current Low drop out design Reverse leakage protection Linear thermal control loop Pre-charge conditioning Programmable Termination Current ƒ Short Circuit protected ƒ Small 3x3mm MLP package The LX2203 charges the battery in two phases: constant current and constant voltage. A reduced current conditioning mode is provided for deeply discharged batteries. The LX2203 automatically restarts if the battery voltage falls below the top-off threshold. The LX2203 enters a low quiescent current sleep mode when power is removed. WWW . Microsemi .C OM The LX2203 is a tiny linear battery charger for Lithium Ion or Lithium Polymer batteries. The LX2203 includes built in MOSFET, accurate current and voltage regulation, reverse blocking protection, over temperature control, and charge status indicator. The accurate programmable charge current and independent termination current programming make it easy to logically reprogram the charge current limit at any time. APPLICATIONS ƒ ƒ ƒ ƒ IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PDAs, MP3 Players Cell Phones Charging cradles Digital Cameras PRODUCT HIGHLIGHT VIN BAT VIN BAT STAT LX2203 CMP CTP EN GND CCP + _ AC/DC Adapter EN 0 1 MODE Sleep mode – charge disabled Charge enabled. ON/OFF PACKAGE ORDER INFO LD LX2203 TA (°C) Plastic MLP 10-Pin RoHS Compliant / Pb-free -40 to 85 LX2203CLD Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX2203CLD-TR) Copyright © 2004 Rev. 1.0a, 2005-08-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX2203 Li-Ion Battery Charger ® TM P RODUCTION D ATA S HEET ABSOLUTE MAXIMUM RATINGS PACKAGE PIN OUT RoHS / Pb-free Peak Package Solder Reflow Temp(40 seconds max. exposure) ............260°C (+0 -5) Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. VIN 1 10 BAT VIN 2 9 BAT STAT 3 8 CMP CTP 4 7 EN GND 5 6 CCP Connect Bottom to Power GND LD PACKAGE THERMAL DATA (Top View) WWW . Microsemi .C OM Supply Voltage (VIN)....................................................................................... -0.3V to 7V Input Signals (SHDN, EN,CMP) ...................................................................... -0.3V to 7V Battery Charging Current (IBAT)....................................................................................1.2A Operating Junction Temperature................................................................... -40C to 150°C Storage Temperature Range.........................................................................-65°C to 150°C RoHS / Pb-free 100% Matte Tin Lead Finish LD Plastic Micro Leadframe Package 10-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 49°C/W Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. FUNCTIONAL PIN DESCRIPTION Name Description BAT Charging Output - This pin is wired to the positive terminal of the battery. (The negative battery terminal is wired to GND.) CCP Charge Current Programming Pin - A resistor (Rccp) is connected between this pin and GND. See application section for programming information. CMP Compensation Pin – Apply a 0.01µF capacitor between CMP and VIN pins. CTP Charge Termination Programming Pin – A resistor (Rctp) is connected between this pin and GND See application section for programming information. EN Enable - Applying a TTL compatible Hi signal enables the charger, a Low signal disables the charger and puts it in sleep mode. GND Common Ground. STAT Status - This pin is a logic low level when the battery is being charged. Pin can sink up to 5mA. PACKAGE DATA VIN Voltage Input – Supply Voltage. Must be greater than VBAT to charge. Copyright © 2004 Rev. 1.0a, 2005-08-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 LX2203 Li-Ion Battery Charger ® TM P RODUCTION D ATA S HEET ELECTRICAL CHARACTERISTICS Parameter ` ` Symbol 4.35 Max Units Quiescent Current IGND 7 µA CTP Bias Voltage VCTP 1.25 V CCP Bias Voltage VCCP 1.25 V VEN = Hi 3 VEN = Lo 6 V 5 mA CONSTANT VOLTAGE MODE VBAT(MAX) VDRP 4.16 4.2 4.24 V VDRP /VBAT(MAX) 96 97 98 % VBAT = VBAT(MAX) 42 51 60 mA 0.9 1.0 1.1 A CONSTANT CURRENT MODE BAT Constant Current Conditioning Current ICOND Conditioning Current Mode Threshold Voltage VBAT(COND) VBAT < VBAT(COND) 4% 5% 6% ICOND IBAT VBAT(COND) /VBAT(MAX) 60 63 66 % 4.5 LOGIC STAT Logic High Output VSTAT ISTAT = -100uA STAT Logic Low Output VSTAT ISTAT = 5mA EN Select Threshold VEN EN bias current IEN Logic Hi V 0.5 V 2.0 Logic Lo VEN = Hi 0.8 8 µA 150 °C 5 µA THERMAL SHUTDOWN Maximum Junction Temperature ` LX2203 Typ VVIN Charge Termination Taper Current ` Min Input Voltage Top Off Charge Droop Threshold ` 70°C except where otherwise MAIN CIRCUITRY BAT Output Voltage ` Test Conditions ≤ WWW . Microsemi .C OM Unless otherwise specified, the following specifications apply over the ambient temperature 0°C ≤ TA noted and the following test conditions: VVIN = 5V, VBAT =3.8V, Rccp = 90.9k, Rctp = 150k. TJ PASS ELEMENT Reverse mode current -IBAT VVIN < VBAT UNDER VOLTAGE LOCKOUT Rising Threshold Voltage VUVLO+ 4.2 V Falling Threshold Voltage VUVLO- 3.9 V ELECTRICALS Copyright © 2004 Rev. 1.0a, 2005-08-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 LX2203 Li-Ion Battery Charger ® TM P RODUCTION D ATA S HEET CHARGING PROFILE CHARGE CURRENT PROGRAMMING Charge Current (mA) Charge Voltage And Current 1200 4.0 3.5 Voltage 3.0 Current 2.5 2.0 1.5 1000 800 600 400 200 1.0 0 0.5 0 4.0 8.0 0 12.0 16.0 WWW . Microsemi .C OM 4.5 Iccp Current (µA) 0 0.5 1.0 1.5 2.0 2.5 Constant Charge Current Programming Charge Time (hours) TERMINATION CURRENT PROGRAMMING CHARGE VOLTAGE DISTRIBUTION 300 250 200 600 COUT 400 150 100 200 50 0 0 20 40 60 80 100 0 4.171 4.174 4.176 4.179 4.181 4.183 4.186 4.188 4.191 4.193 4.196 4.198 4.201 4.203 4.206 4.208 4.210 4.213 4.215 4.218 4.220 4.223 4.225 4.228 4.230 Termination Current (mA) 800 1/Rctp (micromhos) Termination Current Programming V Post Trim Bat Volt 1.0A CHARGE CURRENT DISTRIBUTION 50MA TERMINATION DISTRIBUTION 70 1400 60 1200 50 Count Count 1000 40 30 800 600 CHARTS 20 400 10 200 More -20 -24 -28 -32 -36 -40 -44 -48 -52 -56 0 -60 -920.000E-03 -926.939E-03 -933.878E-03 -940.816E-03 -947.755E-03 -954.694E-03 -961.633E-03 -968.571E-03 -975.510E-03 -982.449E-03 -989.388E-03 -1.003 -996.327E-03 -1.010 -1.017 -1.024 -1.031 -1.038 -1.045 -1.052 -1.059 -1.066 -1.073 -1.080 -1.087 0 A Charge Current Post Trim Copyright © 2004 Rev. 1.0a, 2005-08-10 mA Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 LX2203 Li-Ion Battery Charger ® TM P RODUCTION D ATA S HEET SIMPLIFIED BLOCK DIAGRAM WWW . Microsemi .C OM + EN ENABLE UVLO STAT VDD CHARGE CONTROL BAT CHARGE TERMINATION CONTROL CMP CTP CONSTANT VOLTAGE CONTROL TEMPERATURE CONTROL CCP CONSTANT CURRENT CONTROL GND BLOCK DIAGRAM Figure 1 – Simplified Block Diagram Copyright © 2004 Rev. 1.0a, 2005-08-10 Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 LX2203 ® TM Li-Ion Battery Charger P RODUCTION D ATA S HEET THEORY OF OPERATION WWW . Microsemi .C OM LX2203 CONTROL FLOW DIAGRAM Return to START if EN changes state or VIN is removed. START EN = 1 NO SLEEP YES V IN > V UVLO NO YES V IN > V BAT NO CONSTANT VOLTAGE CHARGE MODE YES NO V BAT >60% CONDITION CHARGE MODE TEMP < 150 NO REDUCE CHARGE CURRENT YES YES CONSTANT CURRENT CHARGE MODE NO I BAT