ATA6870 Datasheet | Atmel

Features - - - - - - - - - - - - - 12-bit Battery-cell Voltage Measurement Simultaneous Battery Cells Measurement in Parallel Cell Temperature Measurement Charge Balancing Capability - Parallel Balancing of Cells Possible Integrated Power Supply for MCU Undervoltage Detection Less than 10 µA Standby Current Low Cell Imbalance Current (< 10 µA) Hot Plug-in Capable Interrupt Timer for Cycling MCU Wake-ups Cost-efficient Solution Due to Cost-optimized 30V CMOS Technology Reliable munication between Stacked ICs Due to Level Shifters with Current Sources and Checksum Monitoring of Data Daisy-chainable - Each IC Monitors up to 6 Battery Cells - 16 ICs (96 Cells) per String - No Limit on Number of Strings Package QFN48 7 mm × 7 mm - Li-Ion, Ni MH Battery Measuring, Charge Balancing and Power-supply Circuit ATA6870 Preliminary Applications - Battery Measurement, Supply and Monitoring IC for Li-ion and Ni MH Battery Systems in Electric (EV) and Hybrid Electrical (HEV) Vehicles Benefits - Highest Safety Level for Li-ion Battery Systems in bination with ATA6871 - Cost Reduction Due to Integrated Measurement Circuit and High Voltage Power-supply 1. Description .. The ATA6870 is a measurement and monitoring circuit designed for Li-ion and Ni MH multicell battery stacks in hybrid electrical vehicles. The ATA6870 monitors the battery-cell voltage and the battery-cell temperature with a 12-bit ADC. The circuit also provides charge-balancing capability for each battery-cell. In addition, a linear regulator is integrated to supply a microcontroller or other external ponents. Reliable munication between stacked ICs is achieved by level-shifters with current sources. The ATA6870 can be connected to three, four, five or six battery-cells. Up to 16 circuits (96 cells) can be cascaded in one string. The number of strings is not limited. 9116B- AUTO- 10/09 2. Block Diagram Figure 2-1. Block Diagram To ATA6870 above VDDHV MBAT7 PD_N DISCH6 Cell 6:...