Overview
The LTC6811HG-1#PBF, produced by Analog Devices Inc., is a multicell battery stack monitor designed to measure up to 12 series-connected battery cells with high precision. This IC is particularly suited for automotive and industrial applications due to its robust specifications and features. It offers a total measurement error of less than 1.2mV, making it highly reliable for battery monitoring systems. The device can be powered directly from the battery stack or from an isolated supply, enhancing its versatility in various battery management systems.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Number of Cells Monitored | Up to 12 | |
| Measurement Error | < 1.2mV | |
| Cell Measurement Range | 0V to 5V | Suitable for most battery chemistries |
| Data Acquisition Time | 290µs (all 12 cells) | Lower rates available for noise reduction |
| Operating Temperature Range | -40°C to 125°C | Automotive grade (H version) |
| Supply Voltage (V+) | 4.5V to 5.5V | |
| Package Type | 48-Lead Plastic SSOP | |
| Interface | isoSPI | High-speed, RF-immune, long-distance communications |
| Power Consumption (Sleep Mode) | 4µA |
Key Features
- High Precision Measurement: Measures up to 12 series-connected battery cells with a total measurement error of less than 1.2mV.
- Flexible Powering: Can be powered directly from the battery stack or from an isolated supply.
- isoSPI Interface: Supports high-speed, RF-immune, long-distance communications. Multiple devices can be connected in series or parallel to the host processor.
- Passive Balancing: Includes individual PWM duty cycle control for each cell.
- Onboard 5V Regulator: Provides a stable voltage supply.
- General Purpose I/O Lines: Five available for various applications.
- Sleep Mode: Reduces current consumption to 4µA.
Applications
- Automotive Battery Management Systems: Suitable for monitoring high-voltage battery stacks in electric and hybrid vehicles.
- Industrial Battery Systems: Used in industrial battery management for high reliability and precision.
- Energy Storage Systems: Applicable in various energy storage applications requiring precise cell monitoring.
Q & A
- What is the maximum number of battery cells the LTC6811HG-1#PBF can monitor?
The LTC6811HG-1#PBF can monitor up to 12 series-connected battery cells.
- What is the measurement error of the LTC6811HG-1#PBF?
The measurement error is less than 1.2mV.
- What is the cell measurement range of the LTC6811HG-1#PBF?
The cell measurement range is from 0V to 5V, suitable for most battery chemistries.
- How long does it take to measure all 12 cells?
All 12 cells can be measured in 290µs, with lower data acquisition rates available for noise reduction.
- What is the operating temperature range of the LTC6811HG-1#PBF?
The operating temperature range is -40°C to 125°C for the automotive grade (H version).
- What interface does the LTC6811HG-1#PBF use for communication?
The LTC6811HG-1#PBF uses an isoSPI interface for high-speed, RF-immune, long-distance communications.
- Can the LTC6811HG-1#PBF be powered directly from the battery stack?
Yes, the LTC6811HG-1#PBF can be powered directly from the battery stack or from an isolated supply.
- Does the LTC6811HG-1#PBF support passive balancing?
Yes, it includes individual PWM duty cycle control for each cell.
- What is the power consumption in sleep mode?
The power consumption in sleep mode is reduced to 4µA.
- What package type is the LTC6811HG-1#PBF available in?
The LTC6811HG-1#PBF is available in a 48-Lead Plastic SSOP package.
