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LTC6802-1: Multicell Battery Stack Monitor Data Sheet (Rev. B)1/27/2010PDF329K
LTC6802-1
12 Channel Multicell Battery Monitor with Daisy Chain Interface, Generation 1
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Overview
Features and Benefits
- Qualified for Automotive Applications
- Measures Up to 12 Li-Ion Cells in Series (60V Max)
- Stackable Architecture Enables >1000V Systems
- 0.25% Maximum Total Measurement Error
- 13ms to Measure All Cells in a System
- Cell Balancing:
- On-Chip Passive Cell Balancing Switches
- Provision for Off-Chip Passive Balancing
- Two Thermistor Inputs Plus On-Board Temperature Sensor
- 1MHz Daisy-Chainable Serial Interface
- High EMI Immunity
- Delta Sigma Converter with Built-In Noise Filter
- Open Wire Connection Fault Detection
- Low Power Modes
- 44-Lead SSOP Package
Product Details
The LTC6802-1 is a complete battery monitoring IC that includes a 12-bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each LTC6802-1 can measure up to 12 series connected battery cells with an input common mode voltage up to 60V. In addition, multiple LTC6802-1 devices can be placed in series to monitor the voltage of each cell in a long battery string. The unique level-shifting serial interface allows the serial ports of these devices to be daisy-chained without optocouplers or isolators.
When multiple LTC6802-1 devices are connected in series they can operate simultaneously, permitting all cell voltages in the stack to be measured within 13ms.
To minimize power, the LTC6802-1 offers a measure mode, which simply monitors each cell for overvoltage and undervoltage conditions. A standby mode is also provided.
Each cell input has an associated MOSFET switch for discharging overcharged cells.
For large battery stack applications requiring individually addressable serial communications, see the LTC6802-2.
| SPI Interface | Features | |
| LTC6802-1 | Daisy Chain | Multiple devices can be connected in serial fashion without digital isolation |
| LTC6802-2 | Addressable | Parallel addressed SPI interface - each device in a chain communicates with a control processor in parallel via external digital isolators |
Applications
- Electric and Hybrid Electric Vehicles
- High Power Portable Equipment
- Backup Battery Systems
- High Voltage Data Acquisition Systems
Product Categories
Product Lifecycle
Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
Documentation & Resources
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R525 Reliability Data3/26/2018PDF87K
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DC1331D - Design Manual1/25/2010PDF1M
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Power and Thermal Monitoring1/9/2017PDF1M
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High Voltage, Precision, Battery Stack Monitor10/25/2016PDF350K
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Battery Stack Management Makes another Leap Forward3/30/2016PDF2M
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Maximize Cycle Life of Rechargeable Battery Packs with Multicell Monitor IC4/1/2010 LT Journal
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Packing in The Power - New Electronics Sep 200910/13/2009PDF935K
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Managing High-Voltage Lithium-Ion Batteries in HEVs4/10/2009PDF137K
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Battery Management Architectures for Hybrid/Electric Vehicles4/8/2009PDF3M
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Battery Stack Monitor Extends Life of Li-Ion Batteries in Hybrid Electric Vehicles3/1/2009 LT Journal
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC6802IG-1#3ZZPBF | Material Declaration | Reliability Data | 44-Lead SSOP | |
| LTC6802IG-1#3ZZTRPBF | Material Declaration | Reliability Data | 44-Lead SSOP | |
| LTC6802IG-1#PBF | Material Declaration | Reliability Data | 44-Lead SSOP | |
| LTC6802IG-1#TRPBF | Material Declaration | Reliability Data | 44-Lead SSOP | |
| Wafer Fabrication Data | R525 Reliability Data |
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LTC6802-1 Discussions
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.