LTC3300-1 High Efficiency Bidirectional Multicell Battery Balancer FEATURES DESCRIPTION n Bidirectional Synchronous Flyback Balancing The LTC 3300-1 is a fault-protected controller IC for of Up to 6 Li-Ion or LiFePO Cells in Series transformer-based bidirectional active balancing of multi- 4 n Up to 10A Balancing Current (Set by Externals) cell battery stacks. All associated gate drive circuitry, n Integrates Seamlessly with the LTC680x Family of precision current sensing, fault detection circuitry and a Multicell Battery Stack Monitors robust serial interface with built-in watchdog timer are n Bidirectional Architecture Minimizes Balancing integrated. Time and Power Dissipation Each LTC3300-1 can balance up to 6 series-connected bat- n Up to 92% Charge Transfer Efficiency tery cells with an input common mode voltage up to 36V. n Stackable Architecture Enables >1000V Systems Charge from any selected cell can be transferred at high n Uses Simple 2-Winding Transformers efficiency to or from 12 or more adjacent cells. A unique n 1MHz Daisy-Chainable Serial Interface with 4-Bit level-shifting SPI-compatible serial interface enables CRC Packet Error Checking multiple LTC3300-1 devices to be connected in series, n High Noise Margin Serial Communication without opto-couplers or isolators, allowing for balancing n Numerous Fault Protection Features of every cell in a long string of series-connected batteries. n 48-Lead Exposed Pad QFN and LQFP Packages n When multiple LTC3300-1 devices are connected in series AEC-Q100 Qualified for Automotive Applications they can operate simultaneously, permitting all cells in APPLICATIONS the stack to be balanced concurrently and independently. Fault protection features include readback capability, cy- n Electric Vehicles/Plug-in HEVs clic redundancy check (CRC) error detection, maximum n High Power UPS/Grid Energy Storage Systems on-time volt-second clamps, and overvoltage shutoffs. n General Purpose Multicell Battery Stacks All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION High Efficiency Bidirectional Balancing NEXT CELL ABOVE CHARGE SERIAL + Balancer Efficiency SUPPLY CHARGE 3 CELL 12 DATA OUT LTC3300-1 (I 1-6) CHARGE RETURN TO LTC3300-1 100 (I 1-6) DISCHARGE ABOVE DC2064A DEMO BOARD 3 I = I = 2.5A CHARGE DISCHARGE + V = 3.6V CELL CELL 7 95 CHARGE + CHARGE I DISCHARGE CELL 6 RETURN DISCHARGE 90 3 85 LTC3300-1 80 + 6 8 10 12 CHARGE I CHARGE CELL 1 NUMBER OF CELLS (SECONDARY SIDE) SUPPLY SERIAL DATA IN 3 33001 TA01b FROM LTC3300-1 BELOW 33001 TA01a NEXT CELL BELOW Rev. C 1 Document Feedback CHARGE TRANSFER EFFICIENCY (%)LTC3300-1 ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (C6 to V ) .................................36V Voltage Between Pins Input Voltage (Relative to V ) Cn to Cn-1* .............................................. 0.3V to 6V C1 ........................................................... 0.3V to 6V InP to Cn-1* .......................................... 0.3V to 0.3V + I1P ....................................................... 0.3V to 0.3V BOOST to C6 .......................................... 0.3V to 6V I1S, I2S, I3S, I4S, I5S, I6S .................... 0.3V to 0.3V CSBO to SCKO, CSBO to SDOI, CSBI, SCKI, SDI ....................................... 0.3V to 6V SCKO to SDOI ....................................... 0.3V to 0.3V CSBO, SCKO, SDOI ................................ 0.3V to 36V SDO Current ...........................................................10mA V , SDO ............................................... 0.3V to 6V G1P, GnP, G1S, GnS, BOOST Current ............... 200mA REG RTONP, RTONS ...........0.3V to Min V + 0.3V, 6V Operating Junction Temperature Range (Notes 2, 7) REG TOS, V , CTRL, LTC3300I-1 ........................................ 40C to 125C MODE BOOST, WDT ..............0.3V to Min V + 0.3V, 6V LTC3300H-1 ....................................... 40C to 150C REG Storage Temperature Range .................. 65C to 150C *n = 2 to 6 PIN CONFIGURATION TOP VIEW TOP VIEW G6S 1 36 C5 G6S 1 36 C5 I6S 2 35 G5P I6S 2 35 G5P G5S 3 34 I5P G5S 3 34 I5P I5S 4 33 C4 I5S 4 33 C4 G4S 5 32 G4P G4S 5 32 G4P I4S 6 31 I4P 49 I4S 6 49 31 I4P G3S 7 V 30 C3 G3S 7 V 30 C3 I3S 8 29 G3P I3S 8 29 G3P G2S 9 28 I3P G2S 9 28 I3P I2S 10 27 C2 I2S 10 27 C2 G1S 11 26 G2P G1S 11 26 G2P I1S 12 25 I2P I1S 12 25 I2P UK PACKAGE 48-LEAD (7mm 7mm) PLASTIC QFN LXE PACKAGE 48-LEAD (7mm 7mm) PLASTIC LQFP T = 150C, = 34C/W, = 3C/W JMAX JA JC EXPOSED PAD (PIN 49) IS V , MUST BE SOLDERED TO PCB T = 150C, = 20.46C/W, = 3.68C/W JMAX JA JC EXPOSED PAD (PIN 49) IS V , MUST BE SOLDERED TO PCB Rev. C 2 48 V RTONS 13 REG 47 TOS RTONP 14 46 V CTRL 15 MODE 45 CSBO CSBI 16 44 SCKO SCKI 17 43 SDOI SDI 18 42 BOOST SDO 19 41 BOOST WDT 20 + 40 BOOST V 21 39 C6 I1P 22 38 G6P G1P 23 37 I6P C1 24 RTONS 13 48 V REG RTONP 14 47 TOS CTRL 15 46 V MODE CSBI 16 45 CSBO SCKI 17 44 SCKO SDI 18 43 SDOI SDO 19 42 BOOST WDT 20 41 BOOST + V 21 40 BOOST I1P 22 39 C6 G1P 23 38 G6P C1 24 37 I6P