BQ29412PW

Overview

Product Category

BQ29412PW belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

This product is primarily used for protecting rechargeable lithium-ion (Li-ion) and lithium-polymer (Li-poly) batteries from overcharging, over-discharging, and short-circuiting.

Characteristics

• Battery protection IC with advanced features
• High accuracy voltage detection
• Low power consumption
• Wide operating voltage range
• Small package size
• Easy integration into battery management systems

Package

The BQ29412PW is available in a small outline package (SOP) with 16 pins.

Essence

The essence of the BQ29412PW lies in its ability to safeguard Li-ion and Li-poly batteries by monitoring their voltage levels and preventing potential hazards such as overcharging or over-discharging.

Packaging/Quantity

The BQ29412PW is typically packaged in reels, with each reel containing a specified quantity of ICs. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Operating Voltage Range: 2.5V to 28V
• Overvoltage Detection Threshold: Adjustable from 2.5V to 4.6V
• Undervoltage Detection Threshold: Adjustable from 1.8V to 3.9V
• Overcurrent Detection Threshold: Adjustable from 10mV to 100mV
• Short-Circuit Detection Delay: Adjustable from 0ms to 20ms
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The BQ29412PW has 16 pins, each serving a specific function:

1. VDD: Power supply input
2. GND: Ground reference
3. BAT: Battery connection
4. VSS: Negative terminal of the battery
5. OV: Overvoltage detection output
6. UV: Undervoltage detection output
7. OC: Overcurrent detection output
8. SC: Short-circuit detection output
9. SDA: Serial data input/output for communication
10. SCL: Serial clock input for communication
11. TS: Temperature sense input
12. SRP: System reset output
13. SRN: System reset output
14. C1-, C1+: Capacitor connections for overvoltage delay
15. C2-, C2+: Capacitor connections for undervoltage delay
16. C3-, C3+: Capacitor connections for short-circuit delay

Functional Features

• Overvoltage Protection: Monitors battery voltage and triggers an alarm or disconnects the battery when it exceeds a predefined threshold.
• Undervoltage Protection: Detects low battery voltage and initiates appropriate actions to prevent damage to the battery.
• Overcurrent Protection: Detects excessive current flow and takes necessary measures to protect the battery and connected circuitry.
• Short-Circuit Protection: Identifies short-circuits and interrupts the current flow to avoid potential hazards.
• Temperature Sensing: Monitors battery temperature and provides thermal protection.

Advantages and Disadvantages

Advantages

• Reliable battery protection against overcharging, over-discharging, overcurrent, and short-circuits.
• High accuracy voltage detection ensures precise monitoring.
• Low power consumption minimizes energy wastage.
• Wide operating voltage range allows compatibility with various battery types.
• Compact package size facilitates integration into space-constrained designs.
• Easy integration into battery management systems simplifies implementation.

Disadvantages

• Limited to Li-ion and Li-poly batteries; not suitable for other battery chemistries.
• Requires additional external components for complete battery protection system.
• May have a learning curve for users unfamiliar with battery protection ICs.

Working Principles

The BQ29412PW operates by continuously monitoring the battery voltage, current, and temperature. It compares these values against predefined thresholds to determine if any abnormal conditions exist. If an abnormality is detected, the IC triggers appropriate actions such as activating alarms, disconnecting the battery, or resetting the system.

Detailed Application Field Plans

The BQ29412PW finds extensive application in various fields, including but not limited to:

1. Portable Electronics: Provides essential battery protection in smartphones, tablets, laptops, and other portable devices.
2. Electric Vehicles: Ensures safe operation of Li-ion/Li-poly batteries used in electric cars, scooters, and bicycles.
3. Energy Storage Systems: Protects batteries in renewable energy storage systems, such as solar power banks and home energy storage units.
4. Medical Devices: Safeguards batteries in medical equipment like patient monitors, defibrillators, and infusion pumps.
5. Industrial Automation: Offers reliable battery protection in industrial control systems, robotics, and wireless sensor networks.

Detailed and Complete Alternative Models