LTM8062/LTM8062A - 32VIN, 2A μModule Power …

1 LTM8062/LTM8062A18062fdFor more information applicaTion FeaTuresDescripTion32 VIN, 2A Module Power Tracking Battery ChargersThe LT M 8062/LTM8062A are complete 32 VIN, 2A Module Power tracking battery chargers. The LTM8062/LTM8062A provide a constant-current/constant-voltage charge characteristic, a 2A maximum charge current, and employ a float voltage feedback reference, so any desired battery float voltage up to for the LTM8062 and up to for the LTM8062A can be programmed with a resistor divider. The LTM8062/LTM8062A employ an input voltage regula-tion loop, which reduces charge current if the input volt-age falls below a programmed level, set with a resistor divider. When the LTM8062/LTM8062A are powered by a solar panel, this input regulation loop is used to maintain the panel at peak output Power . The LTM8062/LTM8062A also feature preconditioning trickle charge, bad battery detection, a choice of termination schemes and automatic LTM8062/LTM8062A are packaged in a thermally en-hanced, compact (9mm 15mm ) over-molded land grid array (LGA) package suitable for automated assembly by standard surface mount equipment.

2 The LTM8062/LTM8062A are RoHS compliant. L, LT, LTC, LTM, Linear Technology, the Linear logo and Module are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective LiFePO4 Module Battery ChargerapplicaTionsn Complete Battery Charger Systemn Input Supply Voltage Regulation Loop for Peak Power Tracking in MPPT (Maximum Peak Power Tracking) Solar Applicationsn Resistor Programmable Float Voltage Up to on the LTM8062 and on the LTM8062An Wide Input Voltage Range: to 32V (40V Abs Max)n 2A Charge Currentn Accommodates Li-Ion/Polymer, LiFePO4, SLAn Integrated Input Reverse Voltage Protectionn User Selectable Termination: C/10 or Termination Timern Float Voltage Reference Accuracy n 9mm 15mm LGA Packagen Industrial Handheld Instrumentsn 12V to 24V Automotive and Heavy Equipmentn Desktop Cradle Chargersn Solar Power Battery ChargingCharge Current vs Battery Voltage8062 TA01aLTM8062 GNDVINAVINVINREGRUNTMRNTCVIN6V TO ( )BATTERY VOLTAGE (V)00 CHARGING CURRENT (mA)225008062 TA01b134100050015002000 NORMAL CHARGINGPRECONDITIONTERMINATIONLTM8062/L TM8062A28062fdFor more information conFiguraTionabsoluTe MaxiMuM raTingsVINA, VIN.

3 40 VVINREG, RUN, CHRG, FAULT ..VIN + , 40 VTMR, NTC .. (LTM80 62) ..15 VBAT (LTM80 62 A) ..20 VBIAS ..10 VADJ ..5 VMaximum Internal Operating Temperature(Note 2) ..125 CMaximum Body Solder Temperature ..245 C(Note 1)ABCDEFBANK 1 FAULTADJBIASBANK 2 BATGNDGHJKL7654321 BANK 3 BANK 4 VINVINALGA PACKAGE77-LEAD (15mm 9mm )TOP VIEWCHRGGNDTMRNTCRUNVINREG TJMAX = 125 C, JA = C/W, JCbottom = C/W, JCtop = C/W, JB = C/W, WEIGHT = VALUES DETERMINED PER JEDEC 51-9, 51-12orDer inForMaTionLEAD FREE FINISHTRAYPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGELTM8062EV#PBFLTM8062EV#PBFLTM8062V7 7-Lead (15mm 9mm ) LGA 40 C to 125 CLTM8062IV#PBFLTM8062IV#PBFLTM8062V77-Le ad (15mm 9mm ) LGA 40 C to 125 CLTM8062 AEV#PBFLTM8062 AEV#PBFLTM8062AV77-Lead (15mm 9mm ) LGA 40 C to 125 CLTM8062 AIV#PBFLTM8062 AIV#PBFLTM8062AV77-Lead (15mm 9mm ) LGA 40 C to 125 CConsult LTC Marketing for parts specified with wider operating temperature ranges.

4 *The temperature grade is identified by a label on the shipping more information on lead free part marking, go to: This product is only offered in trays. For more information go to: more information characTerisTicsNote 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and 2: The LTM8062E/LTM8062AE are guaranteed to meet performance specifications from 0 C to 125 C internal. Specifications over the full 40 C to 125 C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM8062I/LTM8062AI are guaranteed to meet specifications over the full 40 C to 125 C internal operating temperature range. Note that The l denotes the specifications which apply over the full internal operating temperature range, otherwise specifications are at TA = 25 C.

5 RUN = maximum internal temperature is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental 3: This parameter is valid for programmed output battery float voltages For other float voltages, VIN Start is above the programmed output battery float voltage. This parameter is guaranteed by design, characterization, and correlation with statistical process 4: The maximum BAT charging current is reduced by thermal foldback. See the Typical performance Characteristics for Maximum Operating Voltage32 VVIN Start VoltageVBAT = (Note 3) OVLO ThresholdVIN Rising323540 VVIN OVLO Hysteresis1 VVIN UVLO ThresholdVIN UVLO to VIN Diode Forward Voltage DropVINA Current = BAT Float VoltageLTM8062 VInput Supply CurrentStandby Mode RUN = 0, VINREG = 15V85 18 A AMaximum BAT Charging Current(Note 4) Float Reference Voltage VADJ Recharge Threshold VoltageThreshold Relative to ADJ Float Reference Precondition Threshold VoltageADJ Precondition Threshold Hysteresis VoltageRelative to ADJ Precondition Threshold95mVADJ Input Bias CurrentCharging Terminated CV Operation65 110nA nAVINREG Reference VoltageADJ = 3V, IBAT = Bias CurrentVINREG = ANTC Range Limit (High) VoltageVNTC Range Limit (Low)

6 VoltageVNTC Disable Impedance250500k NTC Bias CurrentVNTC = ANTC Threshold HysteresisFor Both High and Low Range Limits20%RUN Threshold VoltageVRUN Hysteresis Voltage120mVRUN Input Bias Current 10nACHRG, FAULT Output Low Voltage10mA Charge/Discharge Current25 ATMR Disable Threshold more information performance characTerisTicsEfficiency vs IB AT, FloatEfficiency vs IB AT, FloatADJ Float Voltage vs TemperatureIBIAS vs IB AT, FloatIBIAS vs IB AT, FloatIBIAS vs IB AT, FloatEfficiency vs IB AT, FloatEfficiency vs IB AT, FloatEfficiency vs IB AT, FloatTA = 25 C, unless otherwise (mA)070 EFFICIENCY (%)7274761000848062 G0150015002000788082 VINA = 12 VVINA = 24 VIBAT (mA)080 EFFICIENCY (%)8182831000878062 G0250015002000848586 VINA = 12 VVINA = 24 VIBAT (mA)081 EFFICIENCY (%)8283841000888062 G03500150025002000858687 VINA = 12 VVINA = 24 VIBAT (mA)082 EFFICIENCY (%)8384851000908062 G045001500200086878889 VINA = 24 VTEMPERATURE ( C) FLOAT VOLTAGE (V) G05 (mA)00 IBIAS (mA)510151000258062 G065001500200020 VINA = 12 VVINA = 24 VIBAT (mA)00 IBIAS (mA)510151000458062 G07500150020002025303540 VINA = 12 VVINA = 24 VIBAT (mA)00 IBIAS (mA)51015100050458062 G08500150020002025303540 VINA = 24 VVINA = 12 VIBAT (mA)086 EFFICIENCY (%)8788891000938062 G2350015002000909192 VINA = 24 VLTM8062/LTM8062A58062fdFor more information performance characTerisTicsInput Current vs IB AT, FloatInput Current vs IB AT, FloatIQ vs VINA, RUN = 0V, VINREG OpenMaximum IB AT vs ADJI nput Current vs IB AT, FloatInput Current vs IB AT, FloatInput Current vs IB AT, FloatIBIAS vs IB AT, FloatIBIAS vs IB AT, FloatTA = 25 C, unless otherwise (mA)00 IBIAS (mA)510151000458062 G09500150020002025303540 VINA = 24 VIBAT (mA)00 INPUT CURRENT (mA)

7 10020010009008008062 G1050015002000300400500600700 VINA = 12 VVINA = 24 VIBAT (mA)00 INPUT CURRENT (mA)2001000140012008062 G11500150020004006008001000 VINA = 12 VVINA = 24 VIBAT (mA)00 INPUT CURRENT (mA)20010001600140012008062 G125001500250020004006008001000 VINA = 12 VVINA = 24 VIBAT (mA)00 INPUT CURRENT (mA)2001000140012008062 G13500150020004006008001000 VINA = 24 VVINA (V)00IQ ( A)202502008062 G1410304050100150 ADJ VOLTAGE (V)00 MAXIMUM IBAT (mA)2250020008062 (mA)0 INPUT CURRENT (mA)8001000120020008062 G2560040005001000150020016001400 VINA = 24 VIBAT (mA)00 IBIAS (mA)51015100050458062 G24500150020002025303540 VINA = 24 VLTM8062/LTM8062A68062fdFor more information performance characTerisTicsTemperature Rise vs IB AT, Float VoltageTemperature Rise vs IB AT, Float VoltageVIN Standby Mode Current vs TemperatureTemperature Rise vs IB AT, Float VoltageTemperature Rise vs IB AT, Float VoltageIBAT (mA)00 TEMPERATURE RISE ( C)51000308062 G195001500200010152025 VINA = 24 VVINA = 12 VIBAT (mA)00 TEMPERATURE RISE ( C)51000308062 G205001500200010152025 VINA = 12 VVINA = 24 VIBAT (mA)00 TEMPERATURE RISE ( C)51000408062 G2150015002000101520253035 VINA = 24 VTEMPERATURE ( C) 500 VIN STANDBY MODE CURRENT (mA)5068062 G22010012345 VINA = 24 VVINA = 12 VTA = 25 C, unless otherwise (mA)00 TEMPERATURE RISE ( C)

8 510100045408062 G26500150020001520253035 VINA = 24 VMaximum IB AT vs VINREGM aximum Charge Current vs TemperatureTemperature Rise vs IB AT, Float VoltageVINREG (V)20 MAXIMUM IBAT (mA)250020008062 ( C) 40 200 CHARGE CURRENT (mA)602000160012008062 G170802040120100400800 IBAT (mA)00 TEMPERATURE RISE ( C)51000258062 G1850015002000101520 VINA = 12 VVINA = 24 VMinimum VIN vs VB AT LoadVBAT (V)00 VIN (V)10258062 G27515205101520 LTM8062/LTM8062A78062fdFor more information FuncTionsGND (Bank 1, Pin L7): Power and Signal Ground (Bank 2): Battery Charge Current Output Bus. The charge function operates to achieve the final float voltage at this pin. The auto-restart feature initiates a new charging cycle when the voltage at the ADJ pin falls below the float voltage. Once the charge cycle is terminated, the input bias current of the BAT pin is reduced to minimize battery discharge while the charger remains (Bank 3): Anode of input reverse protection Schottky diode.

9 Connect the input Power here if input reverse volt-age protection is (Bank 4): Charger Input Supply. Decouple with at least F to GND. Connect the input Power here if no input reverse voltage protection is (Pin G7): The BIAS pin connects to the internal Power bus. In most cases connect to VBAT. If this is not desirable, connect to a Power source greater than and less than (Pin K7): Open-Collector Charger Status Output; typically pulled up through a resistor to a reference voltage. This status pin can be pulled up to voltages as high as VIN and can sink currents up to 10mA. During a battery charging cycle, CHRG is pulled low. When the charge current falls below C/10, the CHRG pin becomes high impedance. If the internal timer is used for termina-tion, the pin stays low during the charging cycle until the charge current drops below a C/10 rate, approximately 200mA, even though the charger will continue to top off the battery until the end-of-charge timer terminates the charge cycle.

10 A temperature fault also causes this pin to be pulled low (see the Applications Information section).NTC (Pin H6): Battery Temperature Monitor Pin. This pin is the input to the NTC (negative temperature coefficient) thermistor temperature monitoring circuit. This function is enabled by connecting a 10k , B = 3380 NTC thermistor from the NTC pin to ground. The pin sources 50 A, and monitors the voltage across the 10k thermistor. When the voltage on this pin is above (T < 0 C) or below (T > 40 C), charging is disabled and the CHRG and FAULT pins are both pulled low. If the internal timer termination is being used, the timer is paused, suspending the charging cycle. Charging resumes when the voltage on NTC returns to within the to active region. There is approxi-mately 5 C of temperature hysteresis associated with each of the temperature thresholds. The temperature monitoring function remains enabled while thermistor resistance to ground is less than 250k.