BQ29412DCT3R - English Editing Encyclopedia Entry

Product Overview

Category

BQ29412DCT3R 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 detection: ±25mV (typical)
• Overcharge detection voltage: 4.2V (typical)
• Overdischarge detection voltage: 2.5V (typical)
• Short-circuit protection: 100mΩ (typical)

Package

BQ29412DCT3R is available in a small SOT-23 package, which is compact and suitable for space-constrained applications.

Essence

The essence of BQ29412DCT3R lies in its ability to safeguard lithium-ion and lithium-polymer batteries by monitoring their voltage levels and preventing potential hazards.

Packaging/Quantity

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

Specifications

• Operating Temperature Range: -40°C to +85°C
• Supply Voltage Range: 2.5V to 4.8V
• Quiescent Current: 10µA (typical)
• Overcharge Detection Voltage: 4.2V (typical)
• Overdischarge Detection Voltage: 2.5V (typical)
• Short-Circuit Protection: 100mΩ (typical)

Detailed Pin Configuration

The BQ29412DCT3R has the following pin configuration:

1. GND (Ground)
2. VDD (Supply Voltage)
3. BAT (Battery Connection)
4. OUT (Output)
5. EN (Enable)

Functional Features

• Overcharge Protection: Monitors the battery voltage and prevents it from exceeding the safe limit by disconnecting the charging source.
• Overdischarge Protection: Detects when the battery voltage drops below a certain threshold and disconnects the load to prevent further discharge.
• Short-Circuit Protection: Safeguards the battery by quickly disconnecting it in case of a short circuit.
• Low Quiescent Current: Consumes minimal power during standby, ensuring efficient battery usage.

Advantages and Disadvantages

Advantages

• High accuracy voltage detection ensures precise protection for batteries.
• Compact SOT-23 package allows for easy integration into space-constrained designs.
• Low quiescent current minimizes power consumption during standby.

Disadvantages

• Limited voltage range may not be suitable for all battery types.
• The small package size may pose challenges during assembly and soldering processes.

Working Principles

BQ29412DCT3R operates based on a voltage monitoring principle. It continuously measures the battery voltage and compares it against predefined thresholds. When the voltage exceeds the overcharge or drops below the overdischarge threshold, the IC takes appropriate action to protect the battery.

Detailed Application Field Plans

The BQ29412DCT3R is widely used in various applications involving lithium-ion and lithium-polymer batteries, including:

1. Portable electronic devices such as smartphones, tablets, and laptops.
2. Electric vehicles and hybrid electric vehicles.
3. Power banks and portable chargers.
4. Medical devices powered by rechargeable batteries.
5. Industrial equipment utilizing battery power.

Detailed and Complete Alternative Models

1. BQ29412DCT3: Similar to BQ29412DCT3R but without the reel packaging.
2. BQ29412DCT3E: Enhanced version with extended temperature range (-40°C to +125°C).
3. BQ29412DCT3T: Tape and reel packaging with 2500 units per reel.

Note: The above alternative models provide similar functionality but may have slight variations in package type, temperature range, or quantity per reel.

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