BQ29411DCTRG4

Product Overview

Category

BQ29411DCTRG4 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: ±25mV (typical)
• Small package size: DCT (SOT-23-6)
• RoHS compliant

Package and Quantity

The BQ29411DCTRG4 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 detection threshold: 100mV (typical)
• Short-circuit detection delay: 7ms (typical)
• Operating temperature range: -40°C to +85°C

Pin Configuration

The BQ29411DCTRG4 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/Undervoltage (OVR/UVR) --| OCD VDD |-- Pin 5: Overcurrent Detection (OCD) |___________| ```

Functional Features

1. Overvoltage and undervoltage protection: The BQ29411DCTRG4 monitors the battery voltage and triggers an alert or disconnects the load when the voltage exceeds or falls below the specified thresholds.
2. Overcurrent detection: It detects excessive current flow and can initiate protective actions to prevent damage to the battery or connected devices.
3. Short-circuit detection: The IC quickly identifies short-circuits and takes appropriate measures to safeguard the battery and circuitry.
4. Low quiescent current: The device consumes minimal power during standby, ensuring efficient battery usage.

Advantages and Disadvantages

Advantages

• High accuracy in voltage monitoring
• Compact package size allows for space-saving designs
• RoHS compliant, environmentally friendly
• Low power consumption enhances battery life

Disadvantages

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

Working Principles

The BQ29411DCTRG4 operates by continuously monitoring the battery voltage, current, and temperature. It compares these values against predefined thresholds to determine if any abnormal conditions exist. When a fault is detected, the IC triggers appropriate actions such as disconnecting the load or generating an alert signal.

Detailed Application Field Plans

The BQ29411DCTRG4 finds applications in various fields, including: 1. Portable electronic devices: Provides essential battery protection in smartphones, tablets, and laptops. 2. Electric vehicles: Ensures safe operation of lithium-ion batteries used in electric cars and bikes. 3. Power banks: Protects the internal battery from overcharging and over-discharging, extending its lifespan. 4. Industrial equipment: Safeguards batteries in industrial machinery, preventing damage due to voltage fluctuations.

Detailed and Complete Alternative Models

1. BQ29412DCTRG4: Similar to BQ29411DCTRG4, but with additional features such as temperature monitoring and adjustable thresholds.
2. BQ29413DCTRG4: Offers enhanced overcurrent detection capabilities and wider operating temperature range.

These alternative models provide similar battery protection functionalities while offering additional features tailored to specific requirements.

Word count: 511 words