ATA6870-DK

ATA6870-DK Datasheet


Atmel ATA6870

Part Datasheet
ATA6870-DK ATA6870-DK ATA6870-DK (pdf)
Related Parts Information
ATA6870-PLQW ATA6870-PLQW ATA6870-PLQW
ATA6870-PLPW ATA6870-PLPW ATA6870-PLPW
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Atmel ATA6870

Li-Ion, NiMH Battery Measuring, Charge Balancing and Power-supply Circuit

DATASHEET
● 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 10µA standby current ● Low cell imbalance current < 10µA ● 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
● Each IC monitors up to 6 battery cells ● 16 ICs 96 cells per string ● No limit on number of strings ● Package QFN48 7mm x7mm
● 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

The ATA6870 is a measurement and monitoring circuit designed for Li-ion and NiMH multicell battery stacks in hybrid electrical vehicles.

The Atmel 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-shifters with current sources. The Atmel 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.

Block Diagram

Figure Block Diagram

To ATA6870 above

MBAT7

DISCH6 MBAT6

Cell 6 Reference

ADC Cell Balancing

MBAT2

DISCH1 MBAT1 TEMPREF

TEMP2 TEMP1

TEMPVSS

Cell 1 Reference

ADC Cell Balancing

Cell Temperature Measuring

Digital Level Shifter Test

Digital Level Shifter

Logic

Digital Level Shifter

VDDHV

Standby Control
3.3V Voltage Regulator
3.3V Internal Voltage Regulator

Internal Biasing

Interchip and

Microcontroller Communication

Interface

GND AVSS DVSS SCANMODE DTST VDDFUSE PWTST CS_FUSE ATST
Ordering Information

Extended Type Number ATA6870-PLPW ATA6870-PLQW

Package Information

Package VQFN_7 x 7_48L Exposed pad x Dimensions in mm Not indicated tolerances

Top 48 1 Pin 1 identification

Package QFN48, 7 x 7 QFN48, 7 x 7

MOQ 1,000 pieces 4,000 pieces
37 36

Bottom

Z 10:1

Drawing-No. Issue 1;

Markings

As a minimum, the devices will be marked with the following ● Date code year and week number ● part number ATA6870
25 24
13 nom.
technical drawings according to DIN specifications

Atmel ATA6870 [DATASHEET] 49

History
9116E-AUTO-07/12
• Section “Communication Error” on page 33 changed
9116D-AUTO-03/11
• Section “12-bits Incremental ADC” on pages 19 to 20 changed
• Figure 7-1 “Power-down” on page 10 changed.
• Figure 7-7 “Block Diagram Battery Voltage Measurement” on page 18 changed
• Table 7-6 “Inputs of the Multiplexer” on page 18 changed
9116C-AUTO-11/10
• ADC adjustment + procedure on pages 19 to 21 changed - Section “12 Bits Incremental ADC” on pages 19 to 21 changed
• Table 7-11 “Electrical Characteristics” number on page 23 changed
• Section “Voltage and Temperature Measurement” on page 38 changed
• Table 7-32 “Operation Register Content” on page 42 changed
• Figure 7-31 “Application” on page 52 changed
• Table 3-1 “Pin Description” on page 4 changed
• Table 5 “Abs.Max.RAtings” changed
• Table 7-1 “Electrical Characteristics” on page 11 changed
• Table 7-5 “Electrical Characteristics” on page 16 changed
• Table 7-7 “Electrical Characteristics” on page 19 changed
• Table 7-9 on page 21 changed
• Table 7-11 “Battery Cell Temperature Measuring Characteristics” on page 23 changed
• Table 7-12 “Battery Cell Temperature Measuring Characteristics” on page 24 changed
• Section “Power On Reset” on page 25 changed
• Table “Battery Cell Temperature Measuring Characteristics” on page 25 changed
More datasheets: 7344-15UBGC/S400-X9 | PI5PD2069WEX | AT91FR4042-CI-T | AT91FR4042-CI | TSL13FN | 2119 | ACPM-7881-TR1 | ACPM-7881-BLK | ATA6870-PLQW | ATA6870-PLPW


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Datasheet ID: ATA6870-DK 519228