LT8584 2.5A Monolithic Active Cell Balancer with Telemetry Interface Fea T Descrip T n 2.5A Typical Average Cell Discharge Current The LT 8584 is a monolithic flyback DC/DC converter de- n Integrated 6A, 50V Power Switch signed to actively balance high voltage stacks of batteries. n Integrates Seamlessly with LTC680x Family: The high efficiency of a switching regulator significantly No Additional Software Required increases the achievable balancing current while reducing n Selectable Current and Temperature Monitors heat generation. Active balancing also allows for capacity re- n Ultralow Quiescent Current in Shutdown covery in stacks of mismatched batteries, a feat unattainable n Engineered for ISO 26262 Compliant Systems with passive balance systems. In a typical system, greater n Isolated Balancing: than 99% of the total battery capacity can be recovered. n Can Return Charge to Top of Stack The LT8584 includes an integrated 6A, 50V power switch, n Can Return Charge to Any Combination of Cells reducing the design complexity of the application circuit. in Stack The part runs completely off of the cell which it is discharg- n Can Return Charge to 12V Battery for Alternator ing, removing the need for complicated biasing schemes Replacement commonly required for external power switches. The enable n Can Be Paralleled for Greater Discharge Capability pin (D ) of the part is designed to work seamlessly with n IN All Quiescent Current in Operation Taken from Local Cell the LTC680x family of battery stack voltage monitoring n 16-Lead TSSOP Package ICs. The LT8584 also provides system telemetry including current and temperature monitoring when used with the a T LTC680x family of parts. When the LT8584 is disabled, less n Active Battery Stack Balancing than 20nA of total quiescent current is typically consumed n Electric and Hybrid Electric Vehicles from the battery. n Fail-Safe Power Supplies L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot n Swap and isoSPI are trademarks of Linear Technology Corporation. All other trademarks are the Energy Storage Systems property of their respective owners. Protected by U.S. Patents, including 6518733 and 6636021. Typical a T + 12-Cell Battery Stack Module with Active Balancing MODULE 2.5A AVERAGE + MODULE + DISCHARGE V LTC6804 BATTERY STACK + MODULE BAT 12 MONITOR READ CELL PARAMETERS C12 LT8584 V S12 CELL ENABLE BALANCING I MEASURABLE CELL DISCHARGE PARAMETERS V REF TEMPERATURE 2.5A AVERAGE + MODULE DISCHARGE + BAT 2 MODULE R + R CABLE CONNECTOR READ CELL PARAMETERS C2 SWITCHING FAULTS LT8584 EXTRACTABLE CELL S2 UNDERVOLTAGE ENABLE BALANCING PARAMETERS SERIAL FAULTS COULOMB COUNTING 2.5A AVERAGE + MODULE DISCHARGE + BAT 1 MODULE READ CELL PARAMETERS C1 LT8584 S1 V /C0 ENABLE BALANCING LT8584 TA01a MODULE 8584fb 1 For more information www.linear.com/LT8584 ion pplica ions pplica ion uresLT8584 a Te Maxi Mu M r a T p c F T (Note 1) TOP VIEW D to GND Voltage ................................................. 10V IN GND 1 16 SW V , V , V MODE, OUT, IN CELL SNS, GND 2 15 SW DCHRG Voltage ............................................ 0.3V to 9V GND 3 14 SW RTMR Voltage .................................................... (Note 2) GND 4 13 SW 17 SW Voltage (Note 3) .................................. 0.4V to 50V GND MODE 5 12 DCHRG V V Voltage ............................................200mV IN CELL RTMR 6 11 V SNS V V Voltage .............................................200mV IN SNS D 7 10 V IN CELL MODE V Voltage .............................................200mV OUT 8 9 V IN IN V , MODE Pin Current ........................................ 1mA SNS FE PACKAGE 16-LEAD PLASTIC TSSOP V , OUT Pin Current ........................................ 10mA CELL T = 150C, = 38C/W JMAX JA SW Pin Negative Current ..........................................2A EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB Operating Junction Temperature Range (Note 4) LT8584E ................................................. 40C to 125C LT8584I.................................................. 40C to 125C LT8584H ................................................ 40C to 150C Storage Temperature Range .................. 65C to 150C Lead Temperature (Soldering, 10 sec) ...................300C o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT8584EFE PBF LT8584EFE TRPBF 8584FE 16-Lead Plastic TSSOP 40C to 125C LT8584IFE PBF LT8584IFE TRPBF 8584FE 16-Lead Plastic TSSOP 40C to 125C LT8584HFE PBF LT8584HFE TRPBF 8584FE 16-Lead Plastic TSSOP 40C to 150C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: