BQ294682DRVR

Product Overview

Category

BQ294682DRVR 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

• Voltage range: 2.5V to 4.8V
• Low quiescent current: 6µA (typical)
• Overcharge detection voltage: 4.35V (typical)
• Overdischarge detection voltage: 2.5V (typical)
• Short-circuit protection threshold: 50mΩ (typical)

Package

BQ294682DRVR comes in a small outline package (SOT-23-6) which provides compactness and ease of integration into various battery-powered devices.

Essence

The essence of BQ294682DRVR lies in its ability to safeguard batteries by monitoring their voltage levels and preventing potential damage caused by overcharging, over-discharging, or short-circuiting.

Packaging/Quantity

This product is typically packaged in reels containing 3000 units per reel.

Specifications

• Supply voltage range: 2.5V to 4.8V
• Operating temperature range: -40°C to +85°C
• Overcharge detection voltage accuracy: ±25mV (typical)
• Overdischarge detection voltage accuracy: ±100mV (typical)
• Short-circuit protection response time: <20µs (typical)
• Quiescent current: 6µA (typical)

Detailed Pin Configuration

1. VDD: Supply voltage input
2. GND: Ground reference
3. BAT: Battery connection
4. OUT: Output pin for control signals
5. SDA: Serial data input/output for communication
6. SCL: Serial clock input for communication

Functional Features

• Overcharge protection: Monitors battery voltage and disconnects the charging source when it exceeds a predefined threshold.
• Overdischarge protection: Cuts off the load from the battery when its voltage drops below a certain level, preventing damage.
• Short-circuit protection: Detects excessive current flow and rapidly disconnects the battery to avoid hazardous situations.
• Communication interface: Provides a serial communication interface (I2C) for configuration and status monitoring.

Advantages and Disadvantages

Advantages

• Efficient battery protection against overcharging, over-discharging, and short-circuiting.
• Low quiescent current ensures minimal power consumption during standby.
• Compact package allows for easy integration into space-constrained designs.
• Accurate voltage detection enhances battery safety.

Disadvantages

• Limited voltage range compatibility (2.5V to 4.8V).
• Requires additional external components for complete battery protection.

Working Principles

BQ294682DRVR operates by continuously monitoring the battery voltage using an internal voltage reference and comparator circuitry. When the voltage exceeds the overcharge threshold or drops below the overdischarge threshold, the IC triggers the appropriate protection mechanism. The short-circuit protection is achieved by detecting excessive current flow through the battery. The communication interface enables configuration and real-time monitoring of the device.

Detailed Application Field Plans

BQ294682DRVR finds applications in various battery-powered devices, including: 1. Portable electronic devices such as smartphones, tablets, and laptops. 2. Electric vehicles and hybrid electric vehicles for battery management. 3. Power banks and portable chargers to ensure safe charging and discharging. 4. Industrial equipment utilizing rechargeable batteries. 5. Renewable energy systems like solar-powered battery storage.

Detailed and Complete Alternative Models

1. BQ2970: Offers similar battery protection features with a wider voltage range (2.5V to 5.5V).
2. MAX14920: Provides comprehensive battery protection and monitoring capabilities with an integrated microcontroller.
3. LTC6804: Suitable for multi-cell battery packs, offering individual cell voltage monitoring and balancing functionality.

Note: This is not an exhaustive list of alternative models, but it provides a glimpse of other options available in the market.

In conclusion, BQ294682DRVR is a specialized integrated circuit designed for battery protection, offering efficient safeguards against overcharging, over-discharging, and short-circuiting. Its compact package, low quiescent current, and accurate voltage detection make it suitable for various battery-powered applications. However, it has some limitations regarding voltage range compatibility and requires additional external components for complete battery protection.