BQ29410DCTRG4

Product Overview

Category

BQ29410DCTRG4 belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

This product is primarily used for protecting rechargeable 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)
• High accuracy voltage thresholds
• Built-in delay times for protection functions
• Small package size: DCTRG4 (SOT-23-6)

Package and Quantity

The BQ29410DCTRG4 is available in a small SOT-23-6 package. It is typically sold in reels containing 3000 units.

Specifications

• Operating Voltage Range: 2.5V to 4.8V
• Overvoltage Threshold: 4.35V (typical)
• Undervoltage Threshold: 2.55V (typical)
• Overcurrent Threshold: 1.5A (typical)
• Short-Circuit Detection Delay: 7ms (typical)
• Overtemperature Threshold: 125°C (typical)
• Quiescent Current: 6µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The BQ29410DCTRG4 has six pins arranged as follows:

```

---

| | --| VDD GND |-- Pin 1: Ground (GND) --| SDA SCL |-- Pin 2: Serial Data (SDA) --| SCD SBS |-- Pin 3: Short-Circuit Detection (SCD) --| OVR UVR |-- Pin 4: Overvoltage (OVR) and Undervoltage (UVR) --| OC OT |-- Pin 5: Overcurrent (OC) and Overtemperature (OT) --| | |___________| ```

Functional Features

1. Overvoltage Protection: Monitors the battery voltage and disconnects it from the load when it exceeds the preset threshold.
2. Undervoltage Protection: Cuts off the battery supply to prevent deep discharge, which can damage the battery.
3. Overcurrent Protection: Detects excessive current flow and interrupts the circuit to avoid damage to the battery or connected devices.
4. Short-Circuit Detection: Identifies short-circuits and isolates the battery to prevent further damage.
5. Overtemperature Protection: Safeguards against high temperatures that could harm the battery or surrounding components.

Advantages and Disadvantages

Advantages

• High accuracy voltage thresholds ensure precise protection.
• Low quiescent current minimizes power consumption.
• Small package size allows for space-efficient designs.
• Built-in delay times provide flexibility in protection functions.

Disadvantages

• Limited operating temperature range (-40°C to +85°C).
• May require additional external components for complete battery protection.

Working Principles

The BQ29410DCTRG4 operates by continuously monitoring the battery voltage, current, and temperature. It compares these values with the preset thresholds and triggers the appropriate protection mechanisms when necessary. The integrated circuit ensures reliable and accurate battery protection, extending its lifespan and preventing hazardous situations.

Detailed Application Field Plans

The BQ29410DCTRG4 is widely used in various applications involving rechargeable lithium-ion and lithium-polymer batteries. Some common application fields include:

1. Portable Electronics: Smartphones, tablets, laptops, and wearable devices.
2. Power Tools: Cordless drills, saws, and other battery-powered tools.
3. Electric Vehicles: Battery management systems for electric cars, scooters, and bicycles.
4. Energy Storage Systems: Solar power storage, uninterruptible power supplies (UPS), and backup power solutions.

Detailed and Complete Alternative Models

1. BQ29412DCTRG4: Similar to BQ29410DCTRG4 but with additional features like cell balancing.
2. BQ29414DCTRG4: Offers enhanced protection capabilities and wider operating temperature range.
3. BQ29416DCTRG4: Designed for higher voltage applications and provides advanced diagnostic features.

These alternative models provide similar functionality to the BQ29410DCTRG4 while offering additional features or specifications tailored to specific requirements.

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