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AD8280:  Lithium Ion Battery Safety Monitor

Product Details

Product Status:Recommended for New Designs

The AD8280 is a hardware-only safety monitor for Lithium Ion battery stacks. The part has inputs to monitor six battery cells and two temperature sensors (either NTC or PTC thermistors). The part is designed to be daisy chained with additional AD8280’s to monitor a stack of significantly more than six cells, but without the need for numerous isolators. Its output can be configured for independent or shared alarm state.

The part functions independently from a primary monitor, such as the AD7280, containing its own reference and LDO, both of which are powered completely from the battery cell stack. The reference, in conjunction with external resistor dividers, is used to establish trip points for the over/under-voltages. Each cell channel contains programmable de-glitching (D/G) circuitry to avoid alarming from transient input levels.

The AD8280 also has two digital pins that can be used to select various combinations of the inputs in the case where there are less than six cells to be monitored. Most importantly, it has a self-test feature making it suitable for high-reliability applications, such as automotive hybrid electric vehicles. It can function over a temperature range of -40°C to +105°C.


Applications
  • Lithium Ion Battery Back-up Monitor
  • Ideally Suited for companion to AD7280 Primary Monitor
  • Lithium Ion Battery Threshold Detection

FEATURES and BENEFITS

  • Chinese data sheet available
  • AEC-Q100 Qualified
  • Extensive Self-test
  • Wide Supply Voltage Range
    6.0V to 30.0V
  • Multiple Inputs
    Monitor 3 to 6 Cell Voltages/2 Temperatures
  • Adjustable Threshold Levels
    Over Voltage/Under Voltage/Over Temperature
  • Alarm Options
    Separate or Shared
  • Extended Temp Range Performance
    -40°C≤TA≤105°C
  • See data sheet for additional features

 

GMT Winner Logo Design News 2011 Golden Mousetrap Awards

ADI's AD8280 won the power management sub-category for the development of a new chip that monitors the voltage and temperature of lithium-ion battery stacks in hybrid and electric vehicles.

Documentation

Title Content Type File Type
AD8280: Lithium Ion Battery Safety Monitor Data Sheet (Rev D, 08/2014) (pdf, 463 kB) Data Sheets PDF
CN0325: PLC/DCS Universal Analog Input Using Either 4 or 6 Pin Terminal Block  (pdf, 2260 kB) Circuit Note PDF
CN-0235: Fully Isolated Lithium Ion Battery Monitoring and Protection System  (pdf, 849 kB) Circuit Note PDF
UG-175: Evaluation Board for AD8280 Lithium Ion Battery Safety Monitor  (pdf, 585 kB) User Guides PDF
Isolation in High-Voltage Battery Monitoring for Transportation Applications
(Analog Dialogue, Vol. 43, Oct 2009)
Analog Dialogue HTML
Brainstorm - Advanced Technology Vehicles
Apart from MPG, what’s a fair way to measure the efficiency of advanced technology vehicles?
(ECN, 11/04/2009)
Technical Articles HTML
Lithium Ion Battery Monitoring – Redundancy Required?
Many discussions at OEMs, electronics suppliers and battery manufacturers focus on how best to structure battery monitoring and management systems.
(ECN, 1/28/2010)
Technical Articles HTML
Emerging Energy Applications Solutions Bulletin, Volume 10, Issue 4  (pdf, 1496 kB) Solutions Bulletins PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
BeMicro FPGA Project for CN0235 with Nios driver FPGA HDL HTML
CN0235 FMC-SDP Interposer & Evaluation Board / Xilinx KC705 Reference Design FPGA HDL HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

AD8280 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8280WASTZ Status: Production 48 ld LQFP 48 Auto Tray, 250 $3.54 $3.41 Y  Material Info PCN Purchase Sample
AD8280WASTZ-RL Status: Production 48 ld LQFP 48 Auto Reel, 2000 $3.54 $3.41 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

AD8280 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8280-EVALZ Status: Production Evaluation Board $172.42 Yes -

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.

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