LTC6803-2/LTC6803-4 Multicell Battery Stack Monitor FEATURES DESCRIPTION n Measures Up to 12 Battery Cells in Series The LTC 6803 is a 2nd generation, complete battery moni- n Stackable Architecture toring IC that includes a 12-bit ADC, a precision voltage n Supports Multiple Battery Chemistries reference, a high voltage input multiplexer and a serial and Supercapacitors interface. Each LTC6803 can measure up to 12 series n Individually Addressable Serial Interface connected battery cells or supercapacitors. Many LTC6803 n 0.25% Maximum Total Measurement Error devices can be stacked to measure the voltage of each cell n Engineered for ISO26262 Compliant Systems in a long battery string. Each LTC6803-2/LTC6803-4 has n 13ms to Measure All Cells in a System an individually addressable serial interface, allowing up n Passive Cell Balancing: to 16 LTC6803-2/LTC6803-4 devices to interface to one Integrated Cell Balancing MOSFETs control processor and operate simultaneously. Each cell Ability to Drive External Balancing MOSFETs input has an associated MOSFET switch for discharging n Onboard Temperature Sensor and Thermistor Inputs overcharged cells. The LTC6803-2 connects the bottom n 1MHz Serial Interface with Packet Error Checking of the stack to V internally. It is pin compatible with the n Safe with Random Connection of Cells LTC6802-2, providing a drop-in upgrade. The LTC6803-4 n Built-In Self Tests separates the bottom of the stack from V , improving n Delta-Sigma Converter With Built-In Noise Filter cell 1 measurement accuracy. n Open-Wire Connection Fault Detection The LTC6803 provides a standby mode to reduce supply n 12A Standby Mode Supply Current current to 12A. Furthermore, the LTC6803 can be powered n High EMI Immunity from an isolated supply, providing a technique to reduce n 44-Lead SSOP Package battery stack current draw to zero. APPLICATIONS The related LTC6803-1 and LTC6803-3 offer a serial in- terface that allows the serial ports of multiple LTC6803-1 n Electric and Hybrid Electric Vehicles or LTC6803-3 devices to be daisy chained without opto- n High Power Portable Equipment couplers or isolators. n Backup Battery Systems L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n Electric Bicycles, Motorcycles, Scooters Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION NEXT 12-CELL + PACK ABOVE V LTC6803-4 Supply Current vs Modes of Operation DIE TEMP 1mA + SERIAL REGISTERS DATA 100A AND 4-BIT CONTROL ADDRESS MUX 50V 12-CELL 12V ISOLATED 10A BATTERY OR DC/DC + CAPACITOR CONVERTER 12-BIT STRING 1A ADC + 100nA VOLTAGE REFERENCE 10nA V EXTERNAL NEXT 12-CELL TEMP PACK BELOW 1nA 100k NTC HW STANDBY MEASURE 100k SHUTDOWN 680324 TA01b 680324 TA01a 680324fa 1 SUPPLY CURRENTLTC6803-2/LTC6803-4 ABSOLUTE MAXIMUM RATINGS (Note 1) + Total Supply Voltage (V to V ) .................................75V Operating Temperature Range Input Voltage (Relative to V ) LTC6803I .............................................40C to 85C C0 ............................................................ 0.3V to 8V LTC6803H .......................................... 40C to 125C C12 ........................................................ 0.3V to 75V Specified Temperature Range Cn (Note 5) ......................... 0.3V to Min (8 n, 75V) LTC6803I .............................................40C to 85C Sn (Note 5) ......................... 0.3V to Min (8 n, 75V) LTC6803H .......................................... 40C to 125C All Other Pins ........................................... 0.3V to 7V Junction Temperature ........................................... 150C Voltage Between Inputs Storage Temperature Range .................. 65C to 150C Cn to Cn 1 ............................................. 0.3V to 8V Note: n = 1 to 12 Sn to Cn 1 ............................................. 0.3V to 8V C12 to C8 ............................................... 0.3V to 25V C8 to C4 ................................................. 0.3V to 25V C4 to C0 ................................................. 0.3V to 25V PIN CONFIGURATION LTC6803-2 LTC6803-4 TOP VIEW TOP VIEW + + V 1 44 CSBI V 1 44 CSBI C12 2 43 SDO C12 2 43 SDO S12 3 42 SDI S12 3 42 SDI C11 4 41 SCKI C11 4 41 SCKI S11 5 40 A3 S11 5 40 A3 C10 6 39 A2 C10 6 39 A2 S10 7 38 A1 S10 7 38 A1 C9 8 37 A0 C9 8 37 A0 S9 9 36 GPIO2 S9 9 36 GPIO2 C8 10 35 GPIO1 C8 10 35 GPIO1 S8 11 34 WDTB S8 11 34 WDTB C7 12 33 NC C7 12 33 TOS S7 13 32 TOS S7 13 32 V REG C6 14 31 V C6 14 31 V REG REF S6 15 30 V S6 15 30 V REF TEMP2 C5 16 29 V C5 16 29 V TEMP2 TEMP1 S5 17 28 V S5 17 28 NC TEMP1 C4 18 27 NC C4 18 27 V S4 19 26 V S4 19 26 C0 C3 20 25 S1 C3 20 25 S1 S3 21 24 C1 S3 21 24 C1 C2 22 23 S2 C2 22 23 S2 G PACKAGE G PACKAGE 44-LEAD PLASTIC SSOP 44-LEAD PLASTIC SSOP T = 150C, = 70C/W T = 150C, = 70C/W JMAX JA JMAX JA 680324fa 2