BQ29443DRBT - English Editing Encyclopedia Entry

Product Overview

Category

BQ29443DRBT 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: 10µA (typical)
• High accuracy voltage thresholds: ±25mV
• Small package size: DSBGA-6
• RoHS compliant

Package and Quantity

The BQ29443DRBT is available in a small DSBGA-6 package. It is typically sold in reels or tubes containing multiple units.

Essence

The essence of BQ29443DRBT lies in its ability to safeguard lithium-ion and lithium-polymer batteries by monitoring their voltage levels and preventing potential damage caused by overcharging, over-discharging, or short-circuiting.

Specifications

• Supply voltage range: 2.5V to 4.8V
• Operating temperature range: -40°C to +85°C
• Overcharge detection voltage range: 3.9V to 4.8V
• Overdischarge detection voltage range: 2.5V to 3.1V
• Short circuit detection delay time: 7ms (typical)
• Quiescent current: 10µA (typical)

Detailed Pin Configuration

The BQ29443DRBT features the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. BAT: Battery connection
4. SDA: Serial data input/output
5. SCL: Serial clock input
6. RST: Reset input

Functional Features

• Overcharge protection: Monitors battery voltage and prevents overcharging.
• Overdischarge protection: Detects low battery voltage and prevents excessive discharge.
• Short circuit protection: Responds quickly to short circuits, preventing damage to the battery and connected devices.
• Reset function: Allows for system reset when necessary.

Advantages and Disadvantages

Advantages

• Wide voltage range compatibility
• High accuracy voltage thresholds ensure precise protection
• Low quiescent current minimizes power consumption
• Small package size allows for space-saving designs
• RoHS compliant, ensuring environmental friendliness

Disadvantages

• Limited to lithium-ion and lithium-polymer battery protection only
• Requires additional external components for complete battery protection system

Working Principles

The BQ29443DRBT operates by continuously monitoring the battery voltage through its dedicated pins. It compares the voltage against predefined thresholds to detect overcharging, overdischarging, and short circuits. When any of these conditions are detected, the IC triggers the appropriate protection mechanism to safeguard the battery and connected devices.

Detailed Application Field Plans

The BQ29443DRBT finds applications in various fields where lithium-ion and lithium-polymer batteries are used, including: 1. Portable electronic devices (e.g., smartphones, tablets) 2. Wearable devices (e.g., smartwatches, fitness trackers) 3. Electric vehicles and hybrid electric vehicles 4. Power banks and portable chargers 5. Medical devices

Detailed Alternative Models

For battery protection purposes, alternative models to BQ29443DRBT include: 1. BQ29700 - Offers similar features with additional cell balancing capabilities. 2. MAX14920 - Provides comprehensive battery protection and monitoring functions. 3. LTC6804 - Suitable for multi-cell battery packs with advanced communication capabilities.

These alternative models offer different features and may be chosen based on specific application requirements.

In conclusion, the BQ29443DRBT is an integrated circuit designed for battery protection, specifically for lithium-ion and lithium-polymer batteries. Its wide voltage range compatibility, high accuracy thresholds, and small package size make it suitable for various portable electronic devices, electric vehicles, and more. However, it is important to consider alternative models depending on specific application needs.