BQ29412PWR

Product Overview

Category

BQ29412PWR 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 batteries in various electronic devices.

Characteristics

• Battery protection IC with advanced features
• High accuracy voltage detection
• Low power consumption
• Compact size
• Easy integration into battery management systems

Package

BQ29412PWR is available in a small outline package (SOP) with 16 pins. The package provides excellent thermal performance and mechanical strength.

Essence

The essence of BQ29412PWR lies in its ability to safeguard batteries by monitoring their voltage levels and preventing potential hazards such as overcharging or over-discharging.

Packaging/Quantity

This product is typically sold in reels containing a specified quantity of units. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 2.5V to 6V
• Overvoltage Threshold: Adjustable from 3V to 4.6V
• Undervoltage Threshold: Adjustable from 1.8V to 3.5V
• Overcurrent Detection Threshold: Adjustable from 0.5A to 10A
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: Less than 10µA

Detailed Pin Configuration

1. VDD: Power supply input
2. GND: Ground reference
3. BAT: Battery connection
4. VSS: Negative terminal of the battery
5. OV: Overvoltage detection pin
6. UV: Undervoltage detection pin
7. OC: Overcurrent detection pin
8. SDA: Serial data input/output
9. SCL: Serial clock input
10. ALERT: Alert output
11. THERM: Thermal sensing input
12. SRN: Serial reset input
13. VREF: Reference voltage output
14. VCC: Power supply output
15. NC: No connection
16. NC: No connection

Functional Features

• Overvoltage protection: Monitors battery voltage and triggers a protective action if it exceeds the set threshold.
• Undervoltage protection: Detects low battery voltage and initiates appropriate measures to prevent damage.
• Overcurrent protection: Identifies excessive current flow and activates safety mechanisms to avoid hazardous situations.
• Temperature monitoring: Allows temperature-based protection by sensing the thermal conditions of the battery.
• Communication interface: Supports serial communication for configuration and status reporting.

Advantages and Disadvantages

Advantages

• High accuracy voltage detection ensures precise battery protection.
• Low power consumption minimizes energy wastage.
• Compact size facilitates integration into space-constrained devices.
• Easy integration into battery management systems simplifies implementation.

Disadvantages

• Limited to lithium-ion and lithium-polymer batteries, not suitable for other battery chemistries.
• Requires additional external components for complete battery protection system implementation.

Working Principles

BQ29412PWR operates by continuously monitoring the battery voltage, current, and temperature. It compares these values with the predefined thresholds to determine if any protection action is necessary. The IC communicates with the battery management system through the serial interface, providing real-time information about the battery's status.

Detailed Application Field Plans

BQ29412PWR finds applications in various electronic devices that utilize lithium-ion or lithium-polymer batteries. Some common application fields include:

1. Portable consumer electronics: Smartphones, tablets, laptops, digital cameras, etc.
2. Electric vehicles: Battery-powered cars, e-bikes, scooters, etc.
3. Power tools: Cordless drills, saws, and other battery-operated tools.
4. Energy storage systems: Backup power supplies, solar energy storage, etc.

Detailed and Complete Alternative Models

1. BQ29414PWR: Similar to BQ29412PWR but with additional features like cell balancing and fuel gauge functionality.
2. BQ29209PWR: Battery protection IC designed for single-cell lithium-ion or lithium-polymer batteries.
3. BQ2970x series: Family of battery protection ICs with various voltage and current rating options.

These alternative models offer similar functionalities and can be considered based on specific application requirements.

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