BQ29312APWRG4

Product Overview

Category

BQ29312APWRG4 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. It ensures the safe and efficient operation of battery-powered devices.

Characteristics

• Battery protection: Prevents overcharging, over-discharging, and short-circuiting.
• High accuracy: Provides precise voltage and current monitoring.
• Low power consumption: Optimizes battery life by minimizing power drain.
• Compact package: Housed in a small form factor for easy integration into various applications.
• Robust design: Withstands harsh environmental conditions and offers reliable performance.

Package and Quantity

The BQ29312APWRG4 is available in a TSSOP-20 package. Each package contains one unit of the IC.

Specifications

• Supply Voltage Range: 2.5V to 16V
• Operating Temperature Range: -40°C to +85°C
• Overvoltage Protection Threshold: Adjustable from 3.6V to 4.8V
• Undervoltage Protection Threshold: Adjustable from 1.8V to 3.0V
• Overcurrent Detection Threshold: Adjustable from 50mV to 400mV
• Short-Circuit Detection Delay: Adjustable from 10μs to 80μs

Pin Configuration

The BQ29312APWRG4 features a total of 20 pins, each serving a specific function. The pin configuration is as follows:

1. VDDP: Positive supply voltage for the IC.
2. GND: Ground reference for the IC.
3. SDA: Serial data input/output for communication.
4. SCL: Serial clock input for communication.
5. ALERT: Open-drain output indicating fault conditions.
6. VSSP: Negative supply voltage for the IC.
7. VREF: Reference voltage output for external use.
8. OV: Overvoltage protection threshold adjustment pin.
9. UV: Undervoltage protection threshold adjustment pin.
10. OC: Overcurrent detection threshold adjustment pin.
11. SC: Short-circuit detection delay adjustment pin. 12-20. NC: No connection pins.

Functional Features

1. Overvoltage Protection: Monitors battery voltage and disconnects the load when it exceeds the set threshold.
2. Undervoltage Protection: Cuts off the load when the battery voltage drops below the specified threshold.
3. Overcurrent Detection: Detects excessive current flow and triggers a protective action.
4. Short-Circuit Detection: Identifies short-circuit conditions and initiates appropriate measures.
5. Communication Interface: Supports I2C communication for configuration and status monitoring.

Advantages and Disadvantages

Advantages

• Effective battery protection ensures safe operation and extends battery life.
• High accuracy monitoring enhances system reliability.
• Compact package allows for easy integration into various devices.
• Adjustable thresholds and delays provide flexibility in customization.
• Robust design withstands challenging environmental conditions.

Disadvantages

• Limited to lithium-ion and lithium-polymer battery applications.
• Requires additional external components for complete battery protection.
• Relatively higher cost compared to simpler protection circuits.

Working Principles

The BQ29312APWRG4 operates by continuously monitoring the battery voltage, current, and temperature. It compares these values with the user-defined thresholds to determine if any protection action is required. When an abnormal condition is detected, such as overvoltage, undervoltage, overcurrent, or short-circuit, the IC disconnects the load from the battery to prevent damage. It also provides an alert signal to notify the system of the fault condition.

Application Field Plans

The BQ29312APWRG4 finds extensive use in various battery-powered applications, including: - Portable electronic devices (smartphones, tablets, laptops) - Electric vehicles and hybrid electric vehicles - Power tools and cordless equipment - Energy storage systems - Medical devices - Industrial automation

Alternative Models

For those seeking alternative options, the following integrated circuits can be considered: - BQ29209: Offers similar battery protection features with a different pin configuration. - MAX14920: Provides comprehensive battery protection and monitoring capabilities. - LTC6803: Suitable for multi-cell battery packs with advanced communication features.

These alternatives offer comparable functionality and can be evaluated based on specific application requirements.

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