ATA6870 ATMEL Corporation, ATA6870 Datasheet

ATA6870

Manufacturer Part Number

ATA6870

Description

Manufacturer

ATMEL Corporation

Datasheet

1.ATA6870.pdf (55 pages)

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Features

•

Applications

•

Benefits

•

1. Description

The ATA6870 is a measurement and monitoring circuit designed for Li-ion and NiMH

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

components. Reliable communication between stacked ICs is achieved by level-shift-

ers 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.

12-bit Battery-cell Voltage Measurement

Simultaneous Battery Cells Measurement in Parallel

Cell Temperature Measurement

Charge Balancing Capability

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 Communication between Stacked ICs Due to Level Shifters with Current

Sources and Checksum Monitoring of Data

Daisy-chainable

Package QFN48 7 mm 7 mm

Battery Measurement, Supply and Monitoring IC for Li-ion and NiMH Battery Systems

in Electric (EV) and Hybrid Electrical (HEV) Vehicles

Highest Safety Level for Li-ion Battery Systems in Combination with ATA6871

Cost Reduction Due to Integrated Measurement Circuit and High Voltage Power-supply

– Parallel Balancing of Cells Possible

– Each IC Monitors up to 6 Battery Cells

– 16 ICs (96 Cells) per String

– No Limit on Number of Strings

Li-Ion, NiMH

Battery

Measuring,

Charge

Balancing and

Power-supply

Circuit

ATA6870

Preliminary

9116B–AUTO–10/09

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