BQ7790400PW - Product Overview

Basic Information

• Category: Integrated Circuit (IC)
• Use: Battery Management System (BMS)
• Characteristics:
  • High precision voltage and current monitoring
  • Overvoltage and undervoltage protection
  • Temperature sensing and thermal shutdown
  • Communication interface for data exchange
• Package: PowerPAD™ TSSOP
• Essence: BQ7790400PW is a highly integrated IC designed for battery management systems. It provides accurate monitoring and protection features to ensure the safe and efficient operation of batteries.
• Packaging/Quantity: Available in tape and reel packaging, with 250 units per reel.

Specifications

• Input Voltage Range: 2.7V to 4.5V
• Operating Temperature Range: -40°C to +85°C
• Number of Pins: 20
• Communication Interface: I2C
• Voltage Monitoring Accuracy: ±0.5%
• Current Monitoring Accuracy: ±1%
• Overvoltage Protection Threshold: Configurable
• Undervoltage Protection Threshold: Configurable
• Temperature Sensing Accuracy: ±2°C

Detailed Pin Configuration

The BQ7790400PW IC has a total of 20 pins. The pin configuration is as follows:

1. VDD: Power supply input
2. GND: Ground reference
3. SDA: I2C data line
4. SCL: I2C clock line
5. ALERT: Interrupt output
6. TS: Temperature sense input
7. BAT: Battery voltage sense input
8. CC: Charge current sense input
9. DSG: Discharge current sense input
10. VREF: Reference voltage output
11. VREG: Regulated voltage output
12. VSS: Negative supply voltage
13. VDD: Power supply input
14. GND: Ground reference
15. SDA: I2C data line
16. SCL: I2C clock line
17. ALERT: Interrupt output
18. TS: Temperature sense input
19. BAT: Battery voltage sense input
20. CC: Charge current sense input

Functional Features

1. Voltage and Current Monitoring: The BQ7790400PW accurately measures battery voltage, charge current, and discharge current for precise monitoring of battery parameters.
2. Overvoltage and Undervoltage Protection: It provides configurable thresholds for overvoltage and undervoltage protection, ensuring the battery operates within safe limits.
3. Temperature Sensing and Thermal Shutdown: The IC includes a temperature sensor to monitor battery temperature. In case of excessive heat, it triggers a thermal shutdown to prevent damage.
4. Communication Interface: BQ7790400PW supports the I2C communication protocol, allowing seamless data exchange with external devices such as microcontrollers or host systems.

Advantages and Disadvantages

Advantages: - High precision monitoring ensures accurate battery management. - Configurable protection thresholds offer flexibility for different battery types. - Integrated temperature sensing prevents overheating and enhances safety. - Communication interface enables easy integration with other systems.

Disadvantages: - Limited to I2C communication interface, may not be compatible with certain systems. - Requires external components for complete battery management system implementation.

Working Principles

The BQ7790400PW operates by continuously monitoring battery voltage, charge current, and discharge current. It compares these values against user-configured thresholds for overvoltage and undervoltage protection. Additionally, the IC measures battery temperature using an integrated sensor. If any parameter exceeds the defined limits or the temperature rises above a certain threshold, the IC triggers appropriate actions such as interrupt signals or thermal shutdown to safeguard the battery.

Detailed Application Field Plans

The BQ7790400PW is widely used in various applications that require precise battery management. Some of the common application fields include:

1. Electric Vehicles (EVs): The IC ensures optimal performance and safety of EV batteries by monitoring voltage, current, and temperature.
2. Portable Electronics: It provides accurate battery management for smartphones, tablets, and other portable devices, extending battery life and preventing damage.
3. Energy Storage Systems: The IC enables efficient monitoring and protection of batteries used in renewable energy storage systems, ensuring reliable operation.
4. Medical Devices: It plays a crucial role in managing battery health and safety in medical equipment, enhancing patient care and device reliability.

Detailed and Complete Alternative Models

1. BQ7790500PW: Similar to BQ7790400PW, but with additional features for advanced battery management.
2. BQ7790600PW: A higher-end model with enhanced precision and extended temperature range.
3. BQ7790700PW: Designed for specific industrial applications, offering ruggedness and extended