LT8490 High Voltage, High Current Buck-Boost Battery Charge Controller with Maximum Power Point Tracking (MPPT) Fea T Descrip T n V Range: 6V to 80V The LT 8490 is a buck-boost switching regulator battery IN n V Range: 1.3V to 80V charger that implements a constant-current constant- BAT n Single Inductor Allows V Above, Below, or Equal voltage (CCCV) charging profile used for most battery IN to V types, including sealed lead-acid (SLA), flooded, gel and BAT n Automatic MPPT for Solar Powered Charging lithium-ion. The device operates from input voltages n Automatic Temperature Compensation above, below or equal to the output voltage and can be n No Software or Firmware Development Required powered by a solar panel or a DC power supply. On-chip n Operation from Solar Panel or DC Supply logic provides automatic maximum power point tracking n Input and Output Current Monitor Pins (MPPT) for solar powered applications. The LT8490 can n Four Integrated Feedback Loops perform automatic temperature compensation by sensing n Synchronizable Fixed Frequency: 100kHz to 400kHz an external thermistor thermally coupled to the battery. n 64-Lead (7mm 11mm 0.75mm) QFN Package STATUS and FAULT pins containing charger information can be used to drive LED indicator lamps. The device is available in a low profile (0.75mm) 7mm 11mm 64-lead a T QFN package. n Solar Powered Battery Chargers L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n Multiple Types of Lead-Acid Battery Charging Technology Corporation. All other trademarks are the property of their respective owners. n Li-Ion Battery Charger n Battery Equipped Industrial or Portable Military Equipment Typical a T Simplified Solar Powered Battery Charger Schematic Maximum Power Point Tracking FULL PANEL SCAN GATEV GATEV CC CC V PANEL 6V/DIV PERTURB & PERTURB & SOLAR PANEL LOAD OBSERVE OBSERVE TG1 BOOST1 SW1 BG1 CSP CSN BG2 SW2 BOOST2 TG2 I PANEL V BAT 1.36A/DIV CSNIN CSPOUT CSPIN CSNOUT + V EXTV IN CC RECHARGABLE 8490 TA01b BATTERY 0.5s/DIV LT8490 AV DD GATEV CC BACK PAGE APPLICATION THERMISTOR TEMPSENSE GATEV CC INTV CC STATUS FAULT GND AV AV DD DD 8490 TA01a 8490fa 1 For more information www.linear.com/LT8490 ion pplica ions pplica ion uresLT8490 a Te Maxi Mu M r a T p in c F T (Note 1) TOP VIEW V V , V V , CSP CSN CSPIN CSNIN V V ................................... 0.3V to 0.3V CSPOUT CSNOUT SS, CLKOUT, CSP, CSN Voltage .................. 0.3V to 3V V Voltage (Note 2) ................................... 0.3V to 2.2V C LDO33, V , AV Voltage .......................... 0.3V to 5V DD DD FBIR 1 52 NC RT, FBOUT Voltage ....................................... 0.3V to 5V FAULT 2 51 STATUS IMON IN, IMON OUT Voltage .................... 0.3V to 5V TEMPSENSE 3 50 IOW V 4 49 SWENO DD SYNC Voltage ............................................ 0.3V to 5.5V FBOW 5 48 ECON INTV , GATEV Voltage ........................... 0.3V to 7V CC CC FBIW 6 INTV 7 46 V V V , V V ................ 0.3V to 7V CC IN BOOST1 SW1 BOOST2 SW2 SWEN 8 45 CSPIN SWEN, MODE Voltage ................................. 0.3V to 7V MODE 9 44 CSNIN 65 SRVO FBIN, SRVO FBOUT Voltage ........... 0.3V to 30V IMON IN 10 GND SHDN 11 42 CSPOUT SRVO IIN, SRVO IOUT Voltage ................. 0.3V to 30V CSN 12 41 CSNOUT FBIN, SHDN Voltage ................................... 0.3V to 30V CSP 13 40 EXTV CC LDO33 14 CSNIN, CSPIN, CSPOUT, CSNOUT Voltage .. 0.3V to 80V FBIN 15 38 SRVO FBOUT V , EXTV Voltage .................................. 0.3V to 80V IN CC FBOUT 16 37 SRVO IOUT IMON OUT 17 36 SRVO IIN SW1, SW2 Voltage .....................................81V (Note 5) V 18 35 SRVO FBIN C BOOST1, BOOST2 Voltage ........................ 0.3V to 87V SS 19 CLKOUT 20 33 BOOST1 BG1, BG2, TG1, TG2 ........................................... (Note 4) IOW, ECON, CLKDET Voltage ......... 0.3V to V + 0.5V DD SWENO, STATUS Voltage ................ 0.3V to V + 0.5V DD FBOW, FBIW, FAULT Voltage .......... 0.3V to V + 0.5V DD VINR, FBOR, IIR, IOR Voltage ......... 0.3V to V + 0.5V DD UKJ PACKAGE TEMPSENSE Voltage....................... 0.3V to V + 0.5V DD 64-LEAD (7mm 11mm) PLASTIC QFN CHARGECFG2, T = 125C, = 34C/W JMAX JA EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB CHARGECFG1 Voltage ..................... 0.3V to V + 0.5V DD Operating Junction Temperature Range LT8490E (Notes 1, 3) ......................... 40C to 125C LT8490I (Notes 1, 3) .......................... 40C to 125C Storage Temperature Range ................. 65C to 150C o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT8490EUKJ PBF LT8490EUKJ TRPBF LT8490UKJ 64-Lead (7mm 11mm) Plastic QFN 40C to 125C LT8490IUKJ PBF LT8490IUKJ TRPBF LT8490UKJ 64-Lead (7mm 11mm) Plastic QFN 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. 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