BQ29703DSER

Product Overview

Category

BQ29703DSER belongs to the category of integrated circuits (ICs).

Use

This IC is primarily used for battery protection and monitoring in various electronic devices.

Characteristics

• Battery protection and monitoring functionality
• Low power consumption
• High accuracy
• Compact size
• Wide operating voltage range

Package

BQ29703DSER is available in a small outline package (SOP) or a thin shrink small outline package (TSSOP).

Essence

The essence of BQ29703DSER lies in its ability to protect and monitor batteries, ensuring their safe and efficient operation.

Packaging/Quantity

This IC is typically sold in reels or tubes, with quantities varying depending on the manufacturer's specifications.

Specifications

• Operating Voltage Range: 2.5V to 18V
• Number of Cells Supported: 1 to 4 cells
• Overvoltage Protection Threshold: Adjustable from 2.5V to 4.6V per cell
• Undervoltage Protection Threshold: Adjustable from 1.8V to 3.9V per cell
• Overcurrent Protection Threshold: Adjustable from 10mV to 100mV
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The BQ29703DSER IC has the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. SDA: Serial data input/output for communication
4. SCL: Serial clock input for communication
5. ALERT: Open-drain output for alert indication
6. TS: Thermistor input for temperature monitoring
7. BAT: Battery voltage input
8. PROTECT: Output indicating battery protection status

Functional Features

• Overvoltage protection: Monitors battery voltage and disconnects the load when it exceeds the set threshold.
• Undervoltage protection: Monitors battery voltage and disconnects the load when it falls below the set threshold.
• Overcurrent protection: Detects excessive current flow and disconnects the load to prevent damage.
• Temperature monitoring: Monitors battery temperature using an external thermistor.
• Communication interface: Supports I2C communication for configuration and status reporting.

Advantages and Disadvantages

Advantages

• Provides comprehensive battery protection and monitoring features.
• High accuracy in voltage and current measurements.
• Flexible configuration options.
• Compact size allows for integration into various electronic devices.
• Wide operating voltage range enables compatibility with different battery types.

Disadvantages

• Requires additional external components for complete battery protection.
• Limited to a maximum of 4 cells, which may not be suitable for certain applications.
• Relatively higher cost compared to simpler battery protection solutions.

Working Principles

BQ29703DSER operates by continuously monitoring the battery voltage, current, and temperature. It compares these values with the user-configured thresholds to determine if any protection action is required. When a fault condition is detected, such as overvoltage, undervoltage, or overcurrent, the IC disconnects the load from the battery to prevent further damage. The status of the protection mechanism is indicated through the PROTECT pin and can be communicated via the ALERT pin.

Detailed Application Field Plans

BQ29703DSER finds applications in various fields where battery protection and monitoring are crucial. Some examples include:

1. Portable electronic devices: Smartphones, tablets, and laptops.
2. Electric vehicles: Battery management systems for electric cars and bikes.
3. Renewable energy systems: Solar power storage and wind energy applications.
4. Industrial equipment: UPS systems, power tools, and robotics.
5. Medical devices: Portable medical equipment and implantable devices.

Detailed and Complete Alternative Models

1. BQ29702DSER: Similar to BQ29703DSER but supports up to 2 cells.
2. BQ29704DSER: Similar to BQ29703DSER but supports up to 4 cells.
3. BQ29701DSER: Similar to BQ29703DSER but with simplified features for cost-sensitive applications.

These alternative models provide options based on the specific requirements of the application, such as the number of battery cells supported or cost considerations.

In conclusion, BQ29703DSER is a versatile integrated circuit that offers comprehensive battery protection and monitoring capabilities. Its compact size, wide operating voltage range, and high accuracy make it suitable for various electronic devices and applications. However, it requires additional external components and may not be ideal for applications with more than 4 battery cells.