LTC6811HG-1#3ZZTRPBF Detailed explanation of pin function specifications and circuit principle instructions

The LTC6811HG-1#3ZZTRPBF is a component from Analog Devices, specifically from their Linear Technology series of products, now owned by Analog Devices. The LTC6811 is a multi-cell battery stack monitor designed for monitoring the voltages of series-connected lithium-ion battery cells in applications like electric vehicles and energy storage systems.

Key Specifications:

Model: LTC6811HG-1#3ZZTRPBF Manufacturer: Analog Devices (formerly Linear Technology) Package: QFN-48 (48 pins, lead-free, RoHS compliant) Function: Battery management IC, monitoring up to 12 series-connected cells Pin Function and Detailed Explanation:

The LTC6811 is housed in a 48-pin QFN package. Below is a detailed list of the pin functions for the entire 48-pin configuration:

Pin Number Pin Name Pin Function Description 1 VSS Ground pin for the device, connects to system ground. 2 VDD Power supply input pin, connects to positive power supply. 3 CELL1- Cell voltage input 1, connects to the negative terminal of the first battery cell. 4 CELL1+ Cell voltage input 1, connects to the positive terminal of the first battery cell. 5 CELL2- Cell voltage input 2, connects to the negative terminal of the second battery cell. 6 CELL2+ Cell voltage input 2, connects to the positive terminal of the second battery cell. 7 CELL3- Cell voltage input 3, connects to the negative terminal of the third battery cell. 8 CELL3+ Cell voltage input 3, connects to the positive terminal of the third battery cell. 9 CELL4- Cell voltage input 4, connects to the negative terminal of the fourth battery cell. 10 CELL4+ Cell voltage input 4, connects to the positive terminal of the fourth battery cell. 11 CELL5- Cell voltage input 5, connects to the negative terminal of the fifth battery cell. 12 CELL5+ Cell voltage input 5, connects to the positive terminal of the fifth battery cell. 13 CELL6- Cell voltage input 6, connects to the negative terminal of the sixth battery cell. 14 CELL6+ Cell voltage input 6, connects to the positive terminal of the sixth battery cell. 15 CELL7- Cell voltage input 7, connects to the negative terminal of the seventh battery cell. 16 CELL7+ Cell voltage input 7, connects to the positive terminal of the seventh battery cell. 17 CELL8- Cell voltage input 8, connects to the negative terminal of the eighth battery cell. 18 CELL8+ Cell voltage input 8, connects to the positive terminal of the eighth battery cell. 19 CELL9- Cell voltage input 9, connects to the negative terminal of the ninth battery cell. 20 CELL9+ Cell voltage input 9, connects to the positive terminal of the ninth battery cell. 21 CELL10- Cell voltage input 10, connects to the negative terminal of the tenth battery cell. 22 CELL10+ Cell voltage input 10, connects to the positive terminal of the tenth battery cell. 23 CELL11- Cell voltage input 11, connects to the negative terminal of the eleventh battery cell. 24 CELL11+ Cell voltage input 11, connects to the positive terminal of the eleventh battery cell. 25 CELL12- Cell voltage input 12, connects to the negative terminal of the twelfth battery cell. 26 CELL12+ Cell voltage input 12, connects to the positive terminal of the twelfth battery cell. 27 CHG Charge input pin, used for controlling charging functions. 28 BAL Balancing input pin, for enabling or disabling cell balancing functions. 29 DIAG Diagnostic output pin, provides status and diagnostic data. 30 HIZ High Impedance Mode pin, used to enable the device's high-impedance state. 31 SDA Serial Data pin for I2C communication, used for reading/writing data. 32 SCL Serial Clock pin for I2C communication, used to synchronize data transfers. 33 TXD Transmit Data pin for UART communication, used for transmitting data. 34 RXD Receive Data pin for UART communication, used for receiving data. 35 NRESET Reset input pin, used to reset the device. 36 VREF Voltage reference input pin, used for supplying a reference voltage. 37 ALERT Alert output pin, indicates if an error condition occurs in the system. 38 GPIO1 General Purpose Input/Output pin 1, can be configured for various functions. 39 GPIO2 General Purpose Input/Output pin 2, can be configured for various functions. 40 GPIO3 General Purpose Input/Output pin 3, can be configured for various functions. 41 GPIO4 General Purpose Input/Output pin 4, can be configured for various functions. 42 VDDIO IO power supply pin, connects to the power supply for the logic interface . 43 NC No Connection, unused pin. 44 NC No Connection, unused pin. 45 NC No Connection, unused pin. 46 NC No Connection, unused pin. 47 NC No Connection, unused pin. 48 NC No Connection, unused pin.

20 FAQ for LTC6811HG-1#3ZZTRPBF:

1. Q: What is the primary function of the LTC6811HG-1#3ZZTRPBF? A: The primary function of the LTC6811HG-1#3ZZTRPBF is to monitor up to 12 series-connected lithium-ion battery cells for voltage measurements and battery management purposes.

2. Q: How many cells can the LTC6811HG-1#3ZZTRPBF monitor? A: The LTC6811HG-1#3ZZTRPBF can monitor up to 12 series-connected cells.

3. Q: What type of communication interfaces are supported by the LTC6811? A: The LTC6811 supports both I2C and UART communication interfaces for data transfer.

4. Q: What is the pin count of the LTC6811HG-1#3ZZTRPBF? A: The LTC6811HG-1#3ZZTRPBF has 48 pins.

5. Q: What is the operating voltage range of the LTC6811HG-1#3ZZTRPBF? A: The operating voltage range for the LTC6811HG-1#3ZZTRPBF is typically 4.5V to 5.5V.

6. Q: How does the LTC6811 perform cell balancing? A: The LTC6811 includes a cell balancing function that can be controlled via the BAL pin for balancing voltage differences between cells in a battery pack.

7. Q: Can the LTC6811 monitor the voltage of individual battery cells? A: Yes, the LTC6811 can monitor the voltage of each individual cell in a series-connected battery pack, up to 12 cells.

8. Q: What is the role of the ALERT pin? A: The ALERT pin signals error conditions, such as overvoltage, undervoltage, or other fault conditions in the battery system.

9. Q: What is the function of the NRESET pin? A: The NRESET pin is used to reset the device, restoring it to its default state.

10. Q: How is the LTC6811 connected to a battery pack? A: The LTC6811 is connected to a battery pack via its CELL1+ to CELL12+ pins for voltage measurement of each individual cell.

11. Q: What is the purpose of the VREF pin? A: The VREF pin is used to provide a reference voltage for the ADC (analog-to-digital converter) in the LTC6811 for accurate voltage measurement.

12. Q: Can the LTC6811 communicate with other devices in a battery management system? A: Yes, the LTC6811 can communicate with other devices in a battery management system via I2C or UART protocols.

13. Q: What is the maximum input voltage per cell that the LTC6811 can measure? A: The LTC6811 can measure input voltages up to 5V per cell.

14. Q: What is the function of the GPIO pins on the LTC6811? A: The GPIO pins can be configured for various functions such as interrupt handling or additional system control.

15. Q: Is the LTC6811 suitable for electric vehicle battery management systems? A: Yes, the LTC6811 is well-suited for electric vehicle battery management systems due to its ability to monitor multiple cells and perform cell balancing