LTC6803-1/LTC6803-3 Multicell Battery Stack Monitor FEATURES DESCRIPTION n Measures Up to 12 Battery Cells in Series The LTC 6803 is a 2nd generation, complete battery n Stackable Architecture monitoring IC that includes a 12-bit ADC, a precision n Supports Multiple Battery Chemistries voltage reference, a high voltage input multiplexer and and Supercapacitors a serial interface. Each LTC6803 can measure up to 12 n Serial Interface Daisy Chains to Adjacent Devices series-connected battery cells or supercapacitors. Using a n 0.25% Maximum Total Measurement Error unique level shifting serial interface, multiple LTC6803-1/ n Engineered for ISO26262 Compliant Systems LTC6803-3 devices can be connected in series, without n 13ms to Measure All Cells in a System opto-couplers or isolators, allowing for monitoring of every n Passive Cell Balancing: cell in a long string of series-connected batteries. Each cell Integrated Cell Balancing MOSFETs input has an associated MOSFET switch for discharging Ability to Drive External Balancing MOSFETs overcharged cells. The LTC6803-1 connects the bottom n Onboard Temperature Sensor and Thermistor Inputs of the stack to V internally. It is pin compatible with the n 1MHz Serial Interface with Packet Error Checking LTC6802-1, providing a drop-in upgrade. The LTC6803-3 n Safe with Random Connection of Cells separates the bottom of the stack from V , improving n Built-In Self Tests cell 1 measurement accuracy. n Delta-Sigma Converter With Built-In Noise Filter The LTC6803 provides a standby mode to reduce supply n Open-Wire Connection Fault Detection current to 12A. Furthermore, the LTC6803 can be powered n 12A Standby Mode Supply Current from an isolated supply, providing a technique to reduce n High EMI Immunity battery stack current draw to zero. n 44-Lead SSOP Package For applications requiring individually addressable serial APPLICATIONS communications, see the LTC6803-2/LTC6803-4. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n Electric and Hybrid Electric Vehicles Technology Corporation. All other trademarks are the property of their respective owners. n High Power Portable Equipment n Backup Battery Systems n Electric Bicycles, Motorcycles, Scooters TYPICAL APPLICATION NEXT 12-CELL Supply Current vs Modes of Operation SERIAL DATA + PACK ABOVE V LTC6803-3 TO LTC6803-3 ABOVE 1mA DIE TEMP + 100A REGISTERS AND CONTROL MUX 50V 10A ISOLATED 12V 12-CELL DC/DC + BATTERY CONVERTER 1A 12-BIT ADC 100nA + VOLTAGE REFERENCE 10nA SERIAL DATA V EXTERNAL TO LTC6803-3 NEXT 12-CELL TEMP 1nA BELOW PACK BELOW HW STANDBY MEASURE 100k NTC SHUTDOWN 680313 TA01b 100k 680313 TA01a 680313fa 1 SUPPLY CURRENTLTC6803-1/LTC6803-3 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 CSBO, SCKO, SDOI ............................... 0.3V to 75V Junction Temperature ........................................... 150C All Other Pins ........................................... 0.3V to 7V Storage Temperature Range .................. 65C to 150C Voltage Between Inputs Note: n = 1 to 12 Cn to Cn 1 ............................................. 0.3V to 8V 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 LTC6803-1 LTC6803-3 TOP VIEW TOP VIEW 1 44 CSBI 1 44 CSBI CSBO CSBO 2 43 SDO 2 43 SDO SDOI SDOI 3 42 SDI 3 42 SDI SCKO SCKO + + 4 41 SCKI 4 41 SCKI V V 5 40 V 5 40 V C12 C12 MODE MODE 6 39 GPIO2 6 39 GPIO2 S12 S12 7 38 GPIO1 7 38 GPIO1 C11 C11 8 37 WDTB 8 37 WDTB S11 S11 9 36 NC 9 36 TOS C10 C10 10 35 TOS 10 35 V S10 S10 REG 11 34 V 11 34 V C9 C9 REG REF 12 33 V 12 33 V S9 S9 REF TEMP2 13 32 V 13 32 V C8 C8 TEMP2 TEMP1 14 31 V 14 31 NC S8 S8 TEMP1 15 30 NC 15 30 V C7 C7 16 29 V 16 29 C0 S7 S7 17 28 S1 17 28 S1 C6 C6 18 27 C1 18 27 C1 S6 S6 19 26 S2 19 26 S2 C5 C5 20 25 C2 20 25 C2 S5 S5 21 24 S3 21 24 S3 C4 C4 22 23 C3 22 23 C3 S4 S4 G PACKAGE G PACKAGE 44-LEAD PLASTIC SSOP 44-LEAD PLASTIC SSOP T = 150C, = 70C/W T = 150C, = 70C/W JMAX JA JMAX JA 680313fa 2