BQ29702DSER

Product Overview

Category

BQ29702DSER belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

This product is primarily used for protecting lithium-ion and lithium-polymer batteries from overcharging, over-discharging, and short-circuiting.

Characteristics

• Integrated circuit for battery protection
• Designed for lithium-ion and lithium-polymer batteries
• Protects against overcharging, over-discharging, and short-circuiting

Package

BQ29702DSER comes in a small outline package (SOP) with a specific pin configuration.

Essence

The essence of this product lies in its ability to safeguard lithium-ion and lithium-polymer batteries by preventing potential damage caused by overcharging, over-discharging, and short-circuiting.

Packaging/Quantity

BQ29702DSER is typically packaged in reels or tubes, and the quantity per package may vary depending on the manufacturer's specifications.

Specifications

• Input Voltage Range: 2.5V to 28V
• Overvoltage Threshold: Adjustable from 2.5V to 4.6V
• Undervoltage Threshold: Adjustable from 1.8V to 3.9V
• Overcurrent Detection Threshold: Adjustable from 10mV to 100mV
• Short-Circuit Detection Delay: Adjustable from 0ms to 20ms
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The BQ29702DSER 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. OUT: Open-drain output indicating fault status
6. PROTECT: Input for external overvoltage protection
7. BAT: Battery connection
8. TS: Thermistor input for temperature monitoring

Functional Features

• Overvoltage protection: Prevents battery damage by disconnecting the load when the voltage exceeds the set threshold.
• Undervoltage protection: Cuts off the load when the battery voltage drops below the specified threshold to prevent deep discharge.
• Overcurrent protection: Detects excessive current flow and interrupts the circuit to avoid overheating and potential hazards.
• Short-circuit protection: Quickly detects short circuits and isolates the battery from the load to prevent further damage.

Advantages and Disadvantages

Advantages

• Comprehensive battery protection against various potential risks
• Adjustable thresholds for customization based on specific battery requirements
• Compact size and easy integration into battery management systems

Disadvantages

• Limited to lithium-ion and lithium-polymer batteries, not suitable for other battery chemistries
• Requires additional external components for complete battery protection system implementation

Working Principles

BQ29702DSER operates by continuously monitoring the battery voltage, current, and temperature. It compares these values with the user-defined thresholds to determine if any protection action is necessary. When a fault condition is detected, the IC triggers the appropriate protection mechanism, such as disconnecting the load or interrupting the circuit.

Detailed Application Field Plans

The BQ29702DSER is widely used in various applications that require battery protection, including:

1. Portable electronic devices: Smartphones, tablets, laptops, and digital cameras.
2. Electric vehicles: Electric cars, e-bikes, and electric scooters.
3. Energy storage systems: Solar power systems, uninterruptible power supplies (UPS), and backup power solutions.
4. Medical devices: Portable medical equipment and implantable devices.
5. Industrial equipment: Robotics, drones, and wireless sensor networks.

Detailed and Complete Alternative Models

1. BQ29703DSER: Similar to BQ29702DSER with additional features for enhanced battery protection.
2. BQ29704DSER: Higher voltage range and increased current handling capability compared to BQ29702DSER.
3. BQ29705DSER: Designed specifically for high-temperature applications with extended operating temperature range.

These alternative models offer similar functionality but may have different specifications and features to cater to specific application requirements.

Word count: 534 words