BQ294703DSGT

Product Overview

Category

BQ294703DSGT belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for battery protection in various electronic devices.

Characteristics

• Package: The BQ294703DSGT comes in a small outline package (SOT-23-6).
• Essence: It provides overvoltage, undervoltage, and overcurrent protection for batteries.
• Packaging/Quantity: The IC is typically sold in reels containing 3000 units.

Specifications

The BQ294703DSGT has the following specifications:

• Overvoltage Protection Threshold: 4.3V
• Undervoltage Protection Threshold: 2.5V
• Overcurrent Protection Threshold: 1.5A
• Operating Voltage Range: 2.5V - 4.8V
• Quiescent Current: 10µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The BQ294703DSGT has six pins with the following functions:

1. VDD: Power supply input pin.
2. GND: Ground reference pin.
3. SDA: Serial data input/output pin.
4. SCL: Serial clock input pin.
5. OUT: Open-drain output pin for fault indication.
6. RST: Reset input pin.

Functional Features

The key functional features of the BQ294703DSGT include:

• Overvoltage Protection: Automatically disconnects the battery from the load when the voltage exceeds the threshold.
• Undervoltage Protection: Cuts off the battery supply when the voltage drops below the specified threshold.
• Overcurrent Protection: Safeguards against excessive current flow by interrupting the circuit.
• Fault Indication: Provides an open-drain output for signaling fault conditions.
• Reset Function: Allows for resetting the IC after a fault condition.

Advantages and Disadvantages

Advantages: - Compact package size enables integration into space-constrained designs. - Wide operating voltage range accommodates various battery types. - Low quiescent current minimizes power consumption.

Disadvantages: - Limited to protection against overvoltage, undervoltage, and overcurrent only. - Requires external components for complete battery management.

Working Principles

The BQ294703DSGT operates based on a combination of voltage and current monitoring. It continuously measures the battery voltage and compares it with the predefined thresholds. If any threshold is exceeded, the IC takes appropriate action to protect the battery and the connected circuitry.

Detailed Application Field Plans

The BQ294703DSGT finds applications in a wide range of electronic devices that utilize batteries, including but not limited to:

1. Portable consumer electronics (e.g., smartphones, tablets)
2. Wearable devices (e.g., smartwatches, fitness trackers)
3. Medical devices (e.g., glucose meters, portable monitors)
4. Industrial equipment (e.g., handheld tools, measurement instruments)

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the BQ294703DSGT include:

1. BQ29700: Provides enhanced battery protection features and supports higher voltage ranges.
2. MAX14920: Offers integrated battery protection and monitoring capabilities.
3. LTC6804: Suitable for multi-cell battery packs with advanced communication interfaces.

These alternative models can be considered based on specific application requirements and desired features.

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