LTC6802IG-1#PBF Analog Devices

LTC6802-1 Multicell Battery Stack Monitor FEATURES DESCRIPTION n Qualified for Automotive Applications The LTC 6802-1 is a complete battery monitoring IC that n Measures Up to 12 Li-Ion Cells in Series (60V Max) includes a 12-bit ADC, a precision voltage reference, a n high voltage input multiplexer and a serial interface. Each Stackable Architecture Enables >1000V Systems n LTC6802-1 can measure up to 12 series connected bat- 0.25% Maximum Total Measurement Error n tery cells with an input common mode voltage up to 60V. 13ms to Measure All Cells in a System n In addition, multiple LTC6802-1 devices can be placed in Cell Balancing: n series to monitor the voltage of each cell in a long battery On-Chip Passive Cell Balancing Switches n string. The unique level-shifting serial interface allows the Provision for Off-Chip Passive Balancing n serial ports of these devices to be daisy-chained without Two Thermistor Inputs Plus On-Board optocouplers or isolators. Temperature Sensor n 1MHz Daisy-Chainable Serial Interface When multiple LTC6802-1 devices are connected in series n High EMI Immunity they can operate simultaneously, permitting all cell volt- n Delta Sigma Converter with Built-In Noise Filter ages in the stack to be measured within 13ms. n Open Wire Connection Fault Detection To minimize power, the LTC6802-1 offers a measure n Low Power Modes mode, which simply monitors each cell for overvoltage n 44-Lead SSOP Package and undervoltage conditions. A standby mode is also provided. APPLICATIONS Each cell input has an associated MOSFET switch for dis- n Electric and Hybrid Electric Vehicles charging overcharged cells. n High Power Portable Equipment n Backup Battery Systems For large battery stack applications requiring individually n High Voltage Data Acquisition Systems addressable serial communications, see the LTC6802-2. All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION NEXT 12-CELL Measurement Error Over SERIAL DATA PACK ABOVE LTC6802-1 + Extended Temperature TO LTC6802-1 V ABOVE DIE TEMP 0.30 0.25 7 REPRESENTATIVE 0.20 REGISTERS UNITS AND 0.15 CONTROL 0.10 12-CELL 0.05 MUX BATTERY 0 STRING 0.05 12-BIT 0.10 ADC 0.15 0.20 0.25 VOLTAGE SERIAL DATA V REFERENCE 0.30 EXTERNAL TO LTC6802-1 50 25 0 25 50 75 100 125 TEMP NEXT 12-CELL BELOW TEMPERATURE (C) PACK BELOW 68021 TA01a 68021 TA01b 100k 100k NTC Rev. B 1 Document Feedback For more information www.analog.com MEASUREMENT ERROR (%)LTC6802-1 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) + TOP VIEW Total Supply Voltage (V to V ) .................................60V 1 CSBI CSBO 44 Input Voltage (Relative to V ) 2 SDO SDOI 43 C1 ............................................................ 0.3V to 9V + + 3 SDI SCKO 42 C12 .......................................... V 0.6V to V + 0.3V + 4 SCKI V 41 Cn (Note 5) ......................... 0.3V to min (9 n, 60V) 5 V C12 40 MODE Sn (Note 5) ......................... 0.3V to min (9 n, 60V) 6 GPIO2 S12 39 + + CSBO, SCKO, SDOI .................. V 0.6V to V + 0.3V 7 GPIO1 C11 38 All other pins ........................................... 0.3V to 7V 8 WDTB S11 37 Voltage Between Inputs 9 MMB C10 36 Cn to Cn-1 ................................................ 0.3V to 9V 10 35 TOS S10 Sn to Cn-1 ................................................ 0.3V to 9V 11 34 V C9 REG C12 to C8 ............................................... 0.3V to 25V 12 33 V S9 REF 13 32 V C8 to C4 ................................................. 0.3V to 25V C8 TEMP2 14 31 V S8 C4 to V ................................................. 0.3V to 25V TEMP1 15 30 NC C7 Operating Temperature Range .................40C to 85C 16 29 V S7 Specified Temperature Range ..................40C to 85C 17 28 S1 C6 Junction Temperature ........................................... 150C 18 27 C1 S6 Storage Temperature Range .................. 65C to 150C 19 26 S2 C5 20 25 C2 S5 *n = 1 to 12 21 24 S3 C4 22 23 C3 S4 G PACKAGE 44-LEAD PLASTIC SSOP T = 150C, = 70C/W JMAX JA ORDER INFORMATION TUBE TAPE AND REEL PART MARKING PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC6802IG-1 PBF LTC6802IG-1 TRPBF LTC6802G-1 44-Lead Plastic SSOP 40C to 85C LTC6802IG-1 3ZZPBF LTC6802IG-1 3ZZTRPBF LTC6802G-1 44-Lead Plastic SSOP 40C to 85C Contact the factory for parts specified with wider operating temperature ranges. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with TRMPBF suffix. Versions of the LTC6802-1 models are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These models are available with WTRPBF, WPBF or ZZPBF suffix and are listed in ADIs ARPL. Note that these automotive models may have specifications that differ from the commercial models therefore designers should review the Electrical Characteristics section of this data sheet carefully. Only the automotive grade products shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for thesemodels. Rev. B 2 For more information www.analog.com