BQ29441DRBT - English Editing Encyclopedia Entry

Product Overview

Category

BQ29441DRBT 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
• Built-in delay times for various protection functions
• Small package size: DSBGA-6

Package and Quantity

The BQ29441DRBT is available in a small DSBGA-6 package. It is typically sold in reels containing 3000 units.

Specifications

• Operating Voltage Range: 2.5V to 4.8V
• Quiescent Current: 10µA (typical)
• Overvoltage Protection Threshold: 4.35V (typical)
• Undervoltage Protection Threshold: 2.5V (typical)
• Overcurrent Detection Threshold: 100mA (typical)
• Short-Circuit Detection Threshold: 200mΩ (typical)

Pin Configuration

The BQ29441DRBT has six pins arranged as follows:

```

---

| | --| VDD GND |-- Pin 1: Ground (GND) --| SDA SCL |-- Pin 2: Serial Data (SDA) --| SCL SDA |-- Pin 3: Serial Clock (SCL) --| N/C N/C |-- Pin 4: Not Connected (N/C) --| OUT RST |-- Pin 5: Output (OUT) --| RST OUT |-- Pin 6: Reset (RST) |___________| ```

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 Detection: Detects excessive current flow and interrupts the circuit to protect the battery and connected devices.
4. Short-Circuit Detection: Identifies short-circuits in the system and isolates the battery to avoid further damage.
5. Delay Times: Built-in delay times for each protection function ensure reliable operation and prevent false triggering.

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows compatibility with various battery types.
• Low quiescent current minimizes power consumption.
• High accuracy voltage detection ensures precise protection thresholds.
• Small package size enables space-saving integration into compact designs.

Disadvantages

• Limited to battery protection applications and not suitable for other purposes.
• Requires additional external components for complete battery protection systems.

Working Principles

The BQ29441DRBT operates by continuously monitoring the battery voltage using an internal voltage reference. When the voltage exceeds or falls below the preset thresholds, the corresponding protection functions are triggered. The delay times ensure that transient voltage fluctuations do not cause false triggering of the protection mechanisms.

Application Field Plans

The BQ29441DRBT is widely used in portable electronic devices such as smartphones, tablets, laptops, and power banks. It provides essential battery protection to prevent potential hazards and extend battery lifespan.

Alternative Models

1. BQ29442DRBT: Similar to BQ29441DRBT but with extended voltage range (up to 5.5V).
2. BQ29443DRBT: Enhanced version with additional protection features, including temperature monitoring and thermal shutdown.

These alternative models offer similar functionality but cater to different voltage requirements or provide additional protection capabilities.

In conclusion, the BQ29441DRBT is a highly reliable integrated circuit designed for battery protection. Its wide operating voltage range, low quiescent current, and accurate voltage detection make it an ideal choice for various portable electronic devices. However, it is important to consider alternative models based on specific application requirements.