LTC6803IG-3#PBF

Product Overview

Category

The LTC6803IG-3#PBF belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in battery management systems (BMS) for monitoring and balancing multiple lithium-ion battery cells.

Characteristics

• The LTC6803IG-3#PBF is a high-performance, multi-cell battery stack monitor.
• It provides accurate voltage measurements and cell balancing capabilities.
• The device operates over a wide temperature range and is suitable for various battery chemistries.
• It offers low power consumption and high noise immunity.

Package

The LTC6803IG-3#PBF is available in a 38-pin SSOP (Shrink Small Outline Package) package.

Essence

The essence of the LTC6803IG-3#PBF lies in its ability to accurately monitor and balance the voltage of individual battery cells within a stack.

Packaging/Quantity

This product is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Number of Cells Monitored: Up to 12 cells
• Cell Voltage Measurement Accuracy: ±0.25mV
• Cell Balancing Current: Up to 150mA
• Operating Temperature Range: -40°C to +85°C
• Communication Interface: SPI (Serial Peripheral Interface)
• Power Consumption: 10µA in Sleep Mode, 1mA during Cell Voltage Conversion

Detailed Pin Configuration

The LTC6803IG-3#PBF features a total of 38 pins. The pin configuration is as follows:

1. VREF-
2. VREF+
3. GPIO1
4. GPIO2
5. GPIO3
6. GPIO4
7. GPIO5
8. GPIO6
9. GPIO7
10. GPIO8
11. GPIO9
12. GPIO10
13. GPIO11
14. GPIO12
15. CS
16. SDO
17. SDI
18. SCK
19. VDD
20. GND
21. VC1
22. VC2
23. VC3
24. VC4
25. VC5
26. VC6
27. VC7
28. VC8
29. VC9
30. VC10
31. VC11
32. VC12
33. CB1
34. CB2
35. CB3
36. CB4
37. CB5
38. CB6

Functional Features

• Accurate measurement of individual cell voltages in a battery stack.
• Cell balancing functionality to equalize voltage levels across cells.
• Fault detection and reporting for overvoltage, undervoltage, and open wire conditions.
• Integrated temperature sensor for monitoring cell temperature.
• SPI interface for communication with external microcontrollers or host systems.

Advantages and Disadvantages

Advantages

• High accuracy voltage measurements ensure precise monitoring of battery cells.
• Cell balancing feature helps extend the overall battery life and improve performance.
• Wide operating temperature range allows for use in various environments.
• Low power consumption minimizes energy usage and extends battery life.
• Robust noise immunity ensures reliable operation in noisy electrical environments.

Disadvantages

• Limited to monitoring and balancing up to 12 battery cells.
• Requires an external microcontroller or host system for full functionality.
• The SSOP package may require careful handling during assembly.

Working Principles

The LTC6803IG-3#PBF works by measuring the voltage of each individual battery cell in a stack using its internal analog-to-digital converters (ADCs). These measurements are then processed and communicated to an external microcontroller or host system via the SPI interface. The device also incorporates cell balancing circuitry, which actively equalizes the voltage levels across cells by diverting excess charge from higher voltage cells to lower voltage cells.

Detailed Application Field Plans

The LTC6803IG-3#PBF is widely used in various applications that require accurate monitoring and management of multi-cell lithium-ion battery packs. Some common application fields include:

1. Electric Vehicles (EVs) and Hybrid Electric Vehicles (HEVs)
2. Energy Storage Systems (ESS)
3. Uninterruptible Power Supplies (UPS)
4. Portable Medical Devices
5. Industrial Equipment

Detailed and Complete Alternative Models

1. LTC6803-1#PBF: Monitors up to 6 cells, otherwise similar specifications.
2. LTC6803-2#PBF: Monitors up to 12 cells, with additional features such as temperature measurement and communication redundancy.
3. LTC6803-3#PBF: Monitors up to 18 cells, suitable for larger battery stacks.

These alternative models