BQ29414DCTT - English Editing Encyclopedia Entry

Product Overview

Category

The BQ29414DCTT belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

This IC 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
• Overcharge detection voltage: 4.2V (typical)
• Overdischarge detection voltage: 2.5V (typical)
• Short-circuit detection delay time: 7ms (typical)

Package

The BQ29414DCTT is available in a small SOT-23 package, which is a surface-mount device (SMD) package with three pins.

Essence

The essence of the BQ29414DCTT lies in its ability to safeguard lithium-ion and lithium-polymer batteries by monitoring their voltage levels and preventing potential hazards such as overcharging, over-discharging, and short-circuiting.

Packaging/Quantity

This IC is typically sold in reels or tubes, with each reel containing 3000 units or each tube containing 100 units.

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 detection delay time: 7ms (typical)

Detailed Pin Configuration

The BQ29414DCTT has three pins:

1. Pin 1: GND (Ground)
2. Pin 2: VCC (Supply Voltage)
3. Pin 3: OUT (Battery Connection)

Functional Features

• Overcharge protection: The IC monitors the battery voltage and disconnects the charging circuit when it reaches the overcharge detection voltage.
• Overdischarge protection: It prevents the battery from discharging below the safe threshold by disconnecting the load when the voltage drops to the overdischarge detection voltage.
• Short-circuit protection: In case of a short circuit, the IC quickly shuts off the battery connection to prevent damage.

Advantages and Disadvantages

Advantages

• High accuracy voltage detection ensures precise battery protection.
• Low quiescent current minimizes power consumption.
• Small package size allows for space-efficient integration into battery-powered devices.

Disadvantages

• Limited voltage range may not be suitable for all battery types.
• Requires external components for complete battery protection.

Working Principles

The BQ29414DCTT operates based on a voltage monitoring principle. It continuously measures the battery voltage and compares it with predefined thresholds for overcharge and overdischarge. When these thresholds are exceeded, the IC triggers the appropriate protection mechanism to safeguard the battery.

Detailed Application Field Plans

The BQ29414DCTT finds applications in various battery-powered devices, including but not limited to: - Portable electronic devices (e.g., smartphones, tablets) - Wearable devices (e.g., smartwatches, fitness trackers) - Medical devices (e.g., insulin pumps, portable monitors) - Electric vehicles (e.g., electric bikes, scooters)

Detailed and Complete Alternative Models

1. BQ29412DCTT: Similar to BQ29414DCTT, but with a lower overcharge detection voltage of 4.1V.
2. BQ29413DCTT: Similar to BQ29414DCTT, but with a higher overcharge detection voltage of 4.3V.
3. BQ29415DCTT: Similar to BQ29414DCTT, but with a higher overdischarge detection voltage of 2.7V.

These alternative models provide flexibility in choosing the appropriate battery protection IC based on specific voltage requirements.

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