LTC6812HLWE-1#3ZZTRPBF
Battery Management
Technical Specifications
| Type | Description |
|---|---|
| Working Voltage V | 5 V |
| Interface | I2C;SPI |
| Iq A | 6e-06 |
| 0V Battery Charge | Not supported |
| Type of Battery | - |
| The Chip Type | Monitoring IC |
| Type | Description |
|---|---|
| Balance Current | 200mA |
| Charge Current - Max | 200mA |
| Operating Temp | -40°C ~ +125°C |
| Features | Cell balancing |
| Package / Case | LQFP-64 |
Product Introduction
The LTC6812-1 is a multicell battery stack monitor that measures up to 15 series connected battery cells with a total measurement error of less than 2.2mV. The cell measurement range of 0V to 5V makes the LTC6812-1 suitable for most battery chemistries. All 15 cells can be measured in 245μs and lower data acquisition rates can be selected for high noise reduction.
Multiple LTC6812-1 devices can be connected in series, permitting simultaneous cell monitoring of long, high voltage battery strings. Each LTC6812-1 has an isoSPI interface for high speed, RF immune, long distance communications. Multiple devices are connected in a daisy chain with one host processor connection for all devices. This daisy chain can be operated bidirectionally, ensuring communication integrity, even in the event of a fault along the communication path.
The LTC6812-1 can be powered directly from the battery stack or from an isolated supply. The LTC6812-1 includes passive balancing for each cell, with individual PwM duty cycle control for each cell. Other features include an onboard 5V regulator, nine general purpose I/O lines and a sleep mode, where current consumption is reduced to 6μA.
Features
- Measures Up to 15 Battery Cells in Series
- 2.2mV Maximum Total Measurement Error
- Stackable Architecture for High Voltage Systems
- Built-In isoSPI™ Interface 1 Mb Isolated Serial Communications
- Uses a Single Twisted Pair, Up to 100 Meters
- Low EMI Susceptibility and Emissions
- Bidirectional for Broken Wire Protection
- 245us to Measure All Cells in a System
- Synchronized Voltage and Current Measurement
- 16-Bit Delta-Sigma ADC with Programmable Noise Filter
- Engineered for ISO 26262-Compliant Systems
- Passive Cell Balancing Up to 200mA (Max) with Programmable Pulse-Width Modulation
- 9 General Purpose Digital I/O or Analog Inputs
- Temperature or Other Sensor Inputs
- Configurable as an I2C or SPI Master
- 6uA Sleep Mode Supply Current
- 64-Lead eLQFP Package
- AEC-Q100 Qualified for Automotive Applications
Applications
- - Electric and Hybrid Electric Vehicles - Backup Battery Systems - Grid Energy Storage - High Power Portable Equipment
Datasheet
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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