BQ29400PWR

Overview

Product Category

BQ29400PWR belongs to the category of integrated circuits (ICs) and specifically falls under the family of battery protection and authentication ICs.

Use

The BQ29400PWR is primarily used for battery protection in various electronic devices. It ensures the safe and reliable operation of rechargeable batteries by monitoring their voltage, current, and temperature.

Characteristics

• Battery protection against overvoltage, undervoltage, overcurrent, and short circuit conditions.
• Authentication features to prevent counterfeit batteries.
• Low power consumption for efficient battery usage.
• Compact package for easy integration into electronic devices.

Package and Quantity

The BQ29400PWR is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 2.5V to 6V
• Operating Temperature Range: -40°C to +85°C
• Overvoltage Protection Threshold: Adjustable from 3.9V to 4.8V
• Undervoltage Protection Threshold: Adjustable from 1.8V to 3.1V
• Overcurrent Detection Threshold: Adjustable from 50mV to 200mV
• Short Circuit Detection Delay: Adjustable from 10μs to 80μs

Pin Configuration

The BQ29400PWR has a total of 16 pins, each serving a specific function. The pin configuration is as follows:

1. VDD: Power supply input
2. GND: Ground reference
3. BAT: Battery connection
4. SDA: Serial data input/output for communication
5. SCL: Serial clock input for communication
6. ALERT: Open-drain output for fault indication
7. TS: Temperature sense input
8. VSS: Negative terminal of the battery
9. VC1: Cell 1 voltage sense input
10. VC2: Cell 2 voltage sense input
11. VC3: Cell 3 voltage sense input
12. VC4: Cell 4 voltage sense input
13. VC5: Cell 5 voltage sense input
14. VC6: Cell 6 voltage sense input
15. VC7: Cell 7 voltage sense input
16. VC8: Cell 8 voltage sense input

Functional Features

Battery Protection

The BQ29400PWR provides comprehensive protection for rechargeable batteries. It monitors the battery voltage and current, ensuring that they remain within safe limits. In case of overvoltage, undervoltage, overcurrent, or short circuit conditions, the IC takes appropriate actions to protect the battery and the connected device.

Authentication

To combat counterfeit batteries, the BQ29400PWR incorporates authentication features. It verifies the authenticity of the battery by comparing it with a pre-programmed code. If the code does not match, the IC prevents the battery from operating, thus ensuring the use of genuine batteries.

Advantages

• Reliable battery protection against various fault conditions.
• Efficient power management with low power consumption.
• Enhanced security through battery authentication.
• Compact package for easy integration into electronic devices.

Disadvantages

• Limited compatibility with specific battery types and configurations.
• Requires additional external components for complete battery protection.

Working Principles

The BQ29400PWR operates based on a combination of voltage, current, and temperature monitoring techniques. It continuously measures the battery parameters and compares them with predefined thresholds. If any parameter exceeds the specified limits, the IC triggers the appropriate protection mechanism to safeguard the battery and the connected device.

The authentication feature works by comparing the unique identification code stored in the IC's memory with the code programmed into the battery. If the codes match, the IC allows the battery to operate normally. Otherwise, it disables the battery to prevent potential hazards.

Application Field Plans

The BQ29400PWR finds applications in various electronic devices that utilize rechargeable batteries. Some of the potential application fields include:

1. Portable consumer electronics (e.g., smartphones, tablets, laptops)
2. Power tools and cordless equipment
3. Electric vehicles and hybrid electric vehicles
4. Energy storage systems
5. Medical devices
6. Industrial automation

Alternative Models

For users seeking alternative options, several other ICs offer similar functionality to the BQ29400PWR. These include:

1. BQ29700: Battery protection and authentication IC with extended features.
2. MAX14920: Integrated battery monitor and protector with advanced diagnostics.
3. LTC6804: Multicell battery stack monitor and protector with high accuracy.

These alternative models provide comparable battery protection and authentication capabilities, catering to different requirements and system designs.

In conclusion, the BQ29400PWR is a versatile integrated circuit designed for battery protection and authentication.