LX2208 2 Amp Three Level Lithium Ion Battery Charger ® TM P RODUCTION D ATA S HEET KEY FEATURES DESCRIPTION Up to 2A Charging Current Integrated Power MOSFET Three Charge Levels for Adapter, and USB Hi and Low Charge Battery from a Current Limited Adapter 0.5% Battery Voltage Accuracy USB Current Compliance Battery Full Indicator CC/CV with Thermal Feedback Battery Temperature Monitor Precision Charge Termination level and the conditioning current at 5% of the constant current level. Power status indicators STAT and DC OK can be configured to show charge in progress, battery fully charged and external power on. The STAT pin is capable of sourcing or sinking 5mA. The DC OK output is an open drain output and can sink 10mA. The LX2208 enters a low quiescent current shut down when power is removed from the IN pin or when it is logically shutdown to minimize battery drain. Protection features include: under voltage lock out, reverse current blocking on the IN pin, internal die temperature thermal loop to reduce charge current to maintain a safe die temperature, and a unsafe battery temperature charge inhibitor. For charging deeply discharged batteries, the controller includes a conditioning charge mode. The LX2208 comes in a 3x3mm 12 pin MLPD package. o o o o o o Protection features: Unsafe Battery Temp Lockout Internal IC Temp Regulator USB Current Limiter Reverse Current Blocking Under Voltage Lockout False Termination Prevention under Low Supply Conditions WWW . Microsemi .C OM The LX2208 is a single cell Lithium Ion or Lithium Polymer battery charger. The controller will charge a single cell Li-Ion battery from either a wall adapter or a USB power source. A low under-voltage lockout level increases usable charging range from a current limited power source. In addition, there is a linear die temperature thermal control loop, which limits the heat dissipation while still charging the battery. There are three logic selectable and programmable charge current levels: the high charge programming level is typically set for charging from the wall adapter, the low level charge programming is typically set to 500mA for full USB charging and 100mA (20%) for reduced USB charging. In addition to setting the high-level charge current, the HCP programming resistor also sets the termination current at 10% of the constant current APPLICATIONS IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com Navigation Devices Multi-Media Players Handheld Devices Digital Cameras PRODUCT HIGHLIGHT Status Charging Adapter or USB IN STAT Full CMP Adapter or USB Select Shutdown H/L SD USB Hi/Low TMP 20% BAT HCP LCP Power On DC OK LX2208 + - GND Current Programming Battery Battery Temperature Lockout Sensing LX2208 PACKAGE ORDER INFO TA (°C) LD Plastic MLPD 3 x 3mm 12 pin RoHS Compliant / Pb-free -40 to 85 LX2208ILD Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX2208ILD-TR) Copyright © 2007 Rev. 1.0, 2007-04-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX2208 ® TM 2 Amp Three Level Lithium Ion Battery Charger P RODUCTION D ATA S HEET ABSOLUTE MAXIMUM RATINGS PACKAGE PIN OUT 1 2 STAT 3 DC OK 4 SD 5 20% 6 12 BAT 11 TMP 10 HCP 9 LCP 8 H/L 7 GND LD Package (Top View) THERMAL DATA RoHS / Pb-free 100% matte Tin Pin Finish LD Plastic Micro Leadframe Package 12-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA WWW . Microsemi .C OM 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. IN CMP 2208 XXXX MSC Supply Input Voltage (IN, BAT) ...................................................................... -0.3V to 7V All other pins ............................................................................................-0.3V to VSUPPLY Battery Charging Current .............................................................................................2.5A Operating Ambient Temperature Range (TA) ..................................................-40 to 125°C Maximum Operating Junction Temperature .............................................................. 150°C Storage Temperature Range.........................................................................-65°C to 150°C Lead Temperature (Soldering 10 seconds)................................................................. 300°C Peak Temp. for Solder Reflow (40 seconds maximum exposure).................. 260°C (+0 -5) 33°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. See layout guidelines section for important details. FUNCTIONAL PIN DESCRIPTION Name Pin Description 12 CMP 2 Input, Compensation – Connect a series combination of a 1k resistor and 0.47µF capacitor from IN to CMP. DC OK 4 Output, Power status logic pin and LED driver – This pin is an open drain output that can sink 10mA of current to drive an external LED. This pin is low impedance to GND when the IN pin input voltage is high enough to charge the battery. GND 7 Common Ground – Used as chip ground and as a reference for the battery return. HCP 10 Input, High Current Programming and Termination Current Programming – A resistor (RHCP) between this pin and GND sets the constant current high level. The following relationship determines the charging current of constant current mode: Typically IBAT=7150/RHCP when H/ L is high. The termination current is set to 1/10 of the HCP current level, and the conditioning current is set to 1/20 of the HCP current level. H/ L 8 High or Low load select logic input – A logic high selects the constant charge current level set by the HCP pin resistor RHCP and a logic low selects the constant charge current level set by the LCP pin resistor RLCP. IN 1 Input Power – Connect to a wall adapter or a USB port. LCP 9 Input, Low Current Programming – A resistor (RLCP) between this pin and GND sets the constant current low level. The following relationship determines the charging current of constant current mode: Typically IBAT=7150/RLCP when H/ L is low and 20% is high. SD 5 Input, Shutdown – A logic high places the LX2208 in shut down mode; it can also be used for USB suspend mode. STAT 3 Output, Charging status logic pin and LED driver – This pin can source or sink 5mA of current to drive an external LED in either output state. This pin is low when the battery is in charging mode and becomes high when the charge cycle is finished. It becomes high impedance when the input power is removed. TMP 11 Input, Battery Temperature Monitor – This sense pin determines the battery temperature. It is connected to a resistor network as defined in the application note. When the TMP pin falls below 29% (typ) of VIN or rises above 74% (typ) of VIN it suspends charging. Ground the TMP pin if it is not used. 20% 6 20% Select logic input – This pin is only monitored when the H/ L pin is low. A logic high on 20% pin selects the constant charge current level set by the LCP pin resistor RLCP. A logic low selects 20% of the constant charge current level set by the LCP pin resistor RLCP . Copyright © 2007 Rev. 1.0, 2007-04-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 LX2208 BAT Output, Battery Connection – This pin is wired to the positive terminal of a single cell Lithium Ion/Polymer battery. LX2208 ® TM 2 Amp Three Level Lithium Ion Battery Charger P RODUCTION D ATA S HEET ELECTRICAL CHARACTERISTICS ` INPUT CIRCUITRY Input Voltage Under Voltage Charging Lockout IN UVLO Hysteresis IN Input Supply Current ` BATTERY CHARGER Constant Voltage Charging Constant Voltage Charging Constant Voltage Charging Charge Current Charge Current Charge Current Low Level Charge Current 20% Charge Current Ratio Condition Current Condition Current Conditioning Current Threshold Termination Current Termination Current Top Off Threshold Top Off Threshold Battery Drain Current Battery Drain Current Battery Drain Current ` LOGIC STAT High Output STAT Low Output Input Logic : SD, H/ L , 20% Input Current : SD, H/ L , 20% Output Logic : DC OK VIN VIN(UVLO) IIN VBAT VBAT VBAT IBAT IBAT IBAT IBAT IBAT IBAT IBAT VBAT IBAT IBAT VBAT Rising input VBAT = 2.8V 4.35 2.9 VBAT = 4.2V (battery charged) SD = High (shutdown mode) 4.2 4.2 4.2 2000 1000 453 453 20 100 50 2.7 250 125 97 4.22 4.24 4.24 2200 1100 500 476 22 150 75 2.9 2 50 V V mV mA µA 0°C ≤ TA ≤ 85°C -40°C ≤ TA ≤ 85°C 96 98 VBAT IBAT IBAT IBAT 96 VBAT = 4.2V (battery charged, VIN > 4.5V) VBAT > VIN VSD=High (shutdown mode) 97 5 5 2.5 98.5 15 15 5 % µA µA µA VSTAT VSTAT VIN = 5.0V, IDRV = -5mA VIN = 5.0V, IDRV = 5mA 4.2 4.5 5 0.5 V V ILOG VLOG(OUT) 4.18 4.16 4.10 1800 900 400 408 18 50 25 2.5 6 3.3 V V V mA mA mA mA % mA mA V mA mA % VLOG IBAT < 100mA @ 25°C (4.5V to 5.5V) IBAT < 100mA (4.5V to 5.5V) IBAT < 100mA (4.35V to 6V) RHCP = 3.57k RHCP = 7.15k RHCP = 15.8k VH/ L = Low I(V 20% = Low) / I (V 20% = High); VH/ L = Low VBAT < VCCT; RHCP = 3.57k VBAT < VCCT; RHCP = 7.15k Rising Battery Voltage RHCP = 3.57k RHCP = 7.15k 5 3.1 225 1 10 Input Logic Threshold 450 725 1000 mV Input Current, VLOG = 2V Input Current, VLOG = 0V Logic Hi Output, 10k Pull up to 3.3V Logic Low Output, ILOG = 10mA 0 -2 3.2 2.5 0 5 2 µA Rising Voltage Falling Voltage Falling Voltage Rising Voltage 72 70.5 27 28 70 0.5 WWW . Microsemi .C OM Unless otherwise specified, the following specifications apply over the operating ambient temperature -40°C ≤ TA ≤ 85°C and the following test conditions: VIN = 5.0V; VSD = Low; VH/ L = High, V 20% = High; VBAT = 3.6V; RHCP =15.8k, RLCP=15.8k; VTMP = 0V. LX2208 Parameter Symbol Test Conditions Units Min Typ Max V ` BATTERY TEMPERATURE MONITOR Cold Threshold Cold Threshold Hot Threshold Hot Threshold TFB Disable Volt VTFB VTFB VTFB VTFB VTFB 75 72 28 30 100 76.5 74 30 31 150 %VIN % VIN % VIN % VIN mV LX2208 Copyright © 2007 Rev. 1.0, 2007-04-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 LX2208 ® TM 2 Amp Three Level Lithium Ion Battery Charger P RODUCTION D ATA S HEET SIMPLIFIED BLOCK DIAGRAM - WWW . Microsemi .C OM + SD 5 ENABLE DCOK 4 UVLO TMP 11 STAT 3 CHARGE CONTROL CMP 2 IN BAT 1 12 CHARGE TERMINATION CONTROL CONSTANT VOLTAGE CONTROL TEMPERATURE CONTROL CONDITIONING THRESHOLD H/L 8 COND. CURRENT 20% 6 LCP 9 10 LX2208 HCP LOW CHARGING CURRENT HIGH CHARGING CURRENT GND 7 Copyright © 2007 Rev. 1.0, 2007-04-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 LX2208 ® TM 2 Amp Three Level Lithium Ion Battery Charger P RODUCTION D ATA S HEET CONTROL LOGIC DIAGRAM RETURN TO START IF VDDBAT, UVLO, or SD CHANGES STATE. START WWW . Microsemi .C OM Definition of VDDBAT: VDDBAT =1 if VIN >VBAT =0 if VIN < VBAT YES SD NO NO VIN > VBAT SLEEP YES YES UVLO NO VOLTAGE MONITORING MODE (STATE). VBAT<97% NO YES VBAT>60% NO CONDITION CHARGE MODE CONSTANT VOLTAGE CHARGE MODE YES CONSTANT CURRENT CHARGE MODE IMAX DETERMINED BY THE STATE OF H/L, RHCP, RLCP and 20%. TEMP < 130 TEMP < 130ºC NO NO YES REDUCE CHARGE CURRENT ICC< IMAX NO YES REDUCE CHARGE CURRENT REDUCE CHARGE CURRENT YES NO IBAT<ITAPER YES LX2208 ICC < IMAX NO REDUCE CHARGE CURRENT ITAPER DETERMINED BY RHCP. YES NO VBAT> VCV RETURN TO THE TOP OF THE CHART. YES Copyright © 2007 Rev. 1.0, 2007-04-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 LX2208 2 Amp Three Level Lithium Ion Battery Charger ® TM P RODUCTION D ATA S HEET APPLICATION CIRCUITS Status Adapter or USB Power Pin 1k 0.47u 10k Grounded Pin in USB cable. Leave open in Adapter Cable. IN STAT SD USB Hi/Low Full DC OK 2.4k Power On LX2208 20% LCP 15.8k 121k TMP 24.9k BAT HCP 3.57k Current Programming 2.4k CMP H/L Shutdown Charging WWW . Microsemi .C OM 2..4k + - GND Battery Battery Temperature Lockout Sensing Figure 1 – Typical Application – 2A adapter charge current and 500mA or 100mA maximum USB charge currents. A grounded spare pin in the USB power cable can be used to sense when the 500mA USB current power source is being used. This application also uses three LED indicators for Power attached, Battery Charging and Battery Full. This configuration also implements circuitry to lockout battery charging if the battery is less than 0ºC or greater than 60°C. LX2208 Copyright © 2007 Rev. 1.0, 2007-04-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6 LX2208 TM ® 2 Amp Three Level Lithium Ion Battery Charger P RODUCTION D ATA S HEET THEORY OF OPERATION INPUT SUPPLY QUALIFICATION If the input supply is not high enough for the internal 4.2V reference to operate, charge termination will be prevented. This may be useful if supply is severely current limited. CONDITIONING CURRENT CHARGE MODE A conditioning current is applied to batteries that are deeply discharged and have a terminal voltage less than 60% of the constant voltage level. The conditioning current is 5% of the HCP programmable constant current level. Once the battery terminal voltage exceeds the conditioning current threshold, the full constant current level is applied (unless charging current is limited by one of the other charger control loops). The IN input is monitored and DC OK is set to a logic low to report the presence of the power source with sufficient voltage to charge the battery. The DC OK threshold is the larger of the UVLO threshold or the battery voltage. CHARGE TERMINATION MODE To increase system battery life and avoid float charging, the LX2208 disconnects the charger once the battery has been fully charged. The charge termination state occurs at the end of constant voltage mode. The termination current is set by the value of the resistor RHCP connected between HCP pin and GND. The STAT pin changes state when charging is completed. TOP OFF CHARGE MODE Once the charger has completed a charge cycle, if power remains applied, the LX2208 enters a Voltage Monitoring mode. In this mode, the LX2208 monitors the battery terminal voltage and applies a top off charge if the battery voltage drops below the top off threshold. Copyright © 2007 Rev. 1.0, 2007-04-03 DC OK PROTECTION FEATURES Conditioning Current Mode – If the battery terminal voltage is less than 2.7V, the battery charger will reduce the charge current to 5%. This also protects the appliance from overheating by trying to drive the full charging current into a short circuited battery. Under Voltage Lockout – The charge cycle will not start until the IN voltage rises above 3.1V. Hysteresis helps alleviate chattering on and off. Thermal Control Loop – If the power dissipation of the charger becomes excessive, the charge current will be linearly reduced to prevent the die temperature from getting above 140°C. This does not cause the charge cycle to stop. Reverse Current Blocking – If IN input is grounded, current will not flow from the BAT pin through the charger. No external blocking diode is required on the input. Shut Down Mode – If the SD pin is asserted a logic high, the charger enters a shut down mode where a very low quiescent current prevents drain from the battery. Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 LX2208 ADAPTER OR USB SELECTION The LX2208 supports battery charging from a system that provides adapter power or USB power using the same external connector. Figure 1 shows one example of a system using a special USB adapter cable to determine whether the power source is USB or Wall Adapter. Similarly, if the system processor senses the absence of USB data, it can logically set the H/ L logic level high to allow a higher charge current to be used. USB CHARGE MODE AND CURRENT LIMIT The LX2208 is fully compliant with, and supports, the USB specifications – the Low Power Peripheral (100mA) and High Power Peripherals (500mA). USB current levels can be set using the appropriate values of the LCP programming resistor RLCP. 20% logic input selects USB high/low charge current. When the SD pin is pulled high, the USB input enters Shut Down mode and will not present a load to the IN pin. WWW . Microsemi .C OM GENERAL DESCRIPTION The LX2208 charges a single cell Lithium Ion or Lithium Polymer battery using two steps: a constant current mode followed by a constant voltage mode. The maximum charging current during the Constant Current Mode of the charging profile can be logically set (using H/ L pin) to two resistor-programmable levels. The resistor RHCP connected between HCP and GND pin sets the higher level current. The resistor RLCP connected between LCP and GND pin sets the lower level current. There is also a 20% logic input that selects either the full current set by the LCP resistor RLCP or 20% of that value. The charger will terminate constant voltage charging once the current drops below the taper current setting which is 10% of the high charge current setting (determined by HCP resistor RHCP value). Page 7 LX2208 2 Amp Three Level Lithium Ion Battery Charger ® TM P RODUCTION D ATA S HEET APPLICATION NOTE I HCP = 1.25 1.25 = = 175µA R HCP 7.15k Charge Current vs IHCP (or ILCP) 2000 1600 1400 1200 1000 800 600 400 200 0 0 50 100 150 200 IHCP (in uA) Copyright © 2007 Rev. 1.0, 2007-04-03 250 300 350 180 160 140 120 100 80 60 40 20 0 0 50 100 150 200 250 300 350 IHCP (in uA) The termination current is always roughly 10% of the maximum charge current set by the HCP resistor RHCP. Constant Charge Current (in mA) RHCP 43.3 169.28k 92 88.67k 460 15.80k 730 9.75k 1000 7.15k 2000 3.56k* * RHCP minimum value Termination Current (in mA) RHCP 4.33 169.28k 9.2 88.67k 46 15.80k 73 9.75k 100 7.15k 200 3.56k* Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 LX2208 Charge Current (in mA) 1800 Termination Current vs IHCP 200 Termination Current (in mA) CURRENT PROGRAMMING RESISTORS The LX2208 has two programming resistors to control the battery charging current during the constant current charging mode of the battery charging cycle. When the H/ L pin is high (selecting the High Current charging mode), the charge current is determined by the value of the HCP programming resistor RHCP. The maximum charge current is determined by the programming current at either the HCP or LCP programming pins (depending on the state of H/ L ); the range of each of these channels is identical. The programming current is the HCP or LCP pin voltage (typically 1.25V) divided by the value of the programming resistor. For example, the HCP current with a 7.15k resistor to GND is: Using the table above it can be seen that for a programming current value of 175µA, the corresponding maximum charge current is 1A. The termination current determines the point at which the charge cycle is terminated and the battery is determined to be fully charged. The termination current is determined by the value of the HCP programming current as determined by the HCP programming resistor RHCP. For a value of IHCP = 175µA (as was used in the previous example), the termination current from the chart below can be seen to be 100mA. WWW . Microsemi .C OM LAYOUT In the layout of the Printed Circuit Board (PCB) it is important to provide a low thermal impedance path from the thermal pad on the bottom of the LX2208 package to the ground plane of the circuit board to maximized heat dissipation. Generally this is accomplished by the use of multiple thermal vias. This insures the LX2208 stays cool and can provide the maximum charge current to minimize the time required to charge the battery. For latch-up prevention purpose, it is important to place 10µF capacitors (X5R or X7R dielectric) close to the IN and BAT pins. With long input cables to the adapter or USB, it is best to use a sheathed cable or twisted wire cable which is typical of most applications. The CMP 0.47µF capacitor and 1k resistor should be placed close to the CMP pin and IN pin; the CMP pin is located adjacent to the IN pin to facilitate this. Page 8 LX2208 ® TM 2 Amp Three Level Lithium Ion Battery Charger P RODUCTION D ATA S HEET APPLICATION NOTE To finish the design it is necessary to create the Thevenin Voltage and resistance using a voltage divider from the input pin (IN). WWW . Microsemi .C OM BATTERY TEMPERATURE MONITOR The LX2208 has an input to monitor the battery temperature during battery charging; this method assumes the battery pack contains a thermistor expressly for this purpose. A typical Lithium Ion battery should only be charged within a temperature range of 0°C to 60°C. For this calculation, a Vishay NTHS0402N01N1003J Thermistor was used. This thermistor has the value of 327kΩ at 0°C, 100kΩ at 25°C and 24.9kΩ at 60°C. The thermistor must be biased with a Thevenin voltage source and series resistance to achieve the proper TMP thresholds. A fixed value resistor is added in series with the thermistor to prevent it from becoming too low impedance at high temperatures and causing the TMP input to default to off. VIN R1 TMP RMIN R2 RNTC The values of R1 and R2 can be calculated as: VTH R1 = RTH TMP R2 = RMIN RNTC R TH = 122k K R 1 × R TH = 14,800k R 1 − R TH In this case, it is not necessary to use R2, because the value is so large it is insignificant. In this case, R1 = RTH. Using a value of RMIN that is equal to the thermistor temperature at 60°C works well; therefore, for this example, set the value of RMIN to 24.9k. This has the effect of adding 24.9k to the thermistor resistance values so it becomes 352kΩ at 0°C, 125kΩ at 25°C and 49.8kΩ at 60°C. The final circuit for this example is: VIN 121k TMP 24.9k The equations for RTH and VTH are, using Cold Temperature Fault Threshold average of 74% and the Hot Temperature Fault Threshold average of 29% of VIN: VTH 0.29 × 0.74 × (R T =0° C − R T =60° C ) = VIN (0.29 × R T =0° C ) − (0.74 × R T =60° C ) The TMP voltages with this circuit are: ⎛ K ⎞ R TH = ⎜ − 1⎟ × R T =0ºC = 121k ⎝ 0.74 ⎠ Where R at temperature is the sum of the thermistor plus RMIN. RNTC 971k 327k 100k 24.9k 12.6k VTMP (%VIN) 89% 74% 51% 29% 24% LX2208 TEMP (°C) -20 0 25 60 80 = K = 0.99 Copyright © 2007 Rev. 1.0, 2007-04-03 RNTC At the trip point threshold, there may be chattering on and off of the charging current. However, as the temperature increases or decreases further from the trip point threshold, the chattering will stop. Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 9 LX2208 ® TM 2 Amp Three Level Lithium Ion Battery Charger P RODUCTION D ATA S HEET APPLICATION NOTE Conditions WWW . Microsemi .C OM POWER STATUS INDICATORS The STAT pin is designed to source or sink current. LEDs can be configured to indicate charging or battery full. The battery full indicator can be connected to DC OK rather than GND to insure it is off when the input power is removed and the STAT pin and DC OK pin go to a high impedance state. STAT Charge in Process Low Charge Completed High Input Power Removed Hi Z CHARGING PROFILE CONDITIONING CURRENT Conditioning Current vs IHCP Battery Charging USB High Level 100 0.45 4.20 0.40 0.35 Vbat 0.30 Ibat 4.10 0.25 4.05 0.20 0.15 4.00 0.10 3.95 Battery Cuurent Battery V oltage 4.15 Conditioning Current (in m A) 0.50 4.25 80 60 40 20 0.05 3.90 0.00 0.0 60.0 120.0 0 0 Time in minutes 50 100 150 200 250 300 350 IHCP (in uA) LX2208 Copyright © 2007 Rev. 1.0, 2007-04-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 10 LX2208 2 Amp Three Level Lithium Ion Battery Charger ® TM P RODUCTION D ATA S HEET PACKAGE DIMENSIONS LD 12-Pin Plastic MLP Dual Exposed Pad WWW . Microsemi .C OM D D2 L K E E2 Pin 1 ID A e Dim A A1 A3 D E D2 E2 e K L b A3 A1 b MILLIMETERS MIN MAX 0.80 1.00 0.00 0.05 0.20 REF 3.00 BSC 3.00 BSC 1.87 2.12 1.06 1.31 0.45 BSC 0.20 MIN 0.30 0.50 0.15 0.25 INCHES MIN MAX 0.031 0.039 0.000 0.002 0.008 REF 0.118 BSC 0.118 BSC 0.074 0.083 0.042 0.052 0.018 BSC 0.008 MIN 0.012 0.020 0.006 0.010 Note: 1. PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2007 Rev. 1.0, 2007-04-03 Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 11 LX2208 Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage.