BQ29732DSET

Product Overview

Category

BQ29732DSET belongs to the category of integrated circuits (ICs) and specifically falls under the family of battery protection devices.

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

• Overvoltage Protection: Prevents the battery voltage from exceeding a safe threshold.
• Undervoltage Protection: Safeguards against excessive discharge, ensuring the battery remains within a safe voltage range.
• Short-Circuit Protection: Detects and prevents short-circuits, minimizing potential damage to the battery and connected circuitry.
• Low Power Consumption: The device itself consumes minimal power, maximizing battery life.
• Compact Package: BQ29732DSET comes in a small form factor, making it suitable for space-constrained applications.
• High Accuracy: Provides precise voltage monitoring and protection thresholds.

Package and Quantity

The BQ29732DSET is available in a surface-mount package (e.g., TSSOP-14). Each package contains one unit of the IC.

Specifications

• Operating Voltage Range: 2.5V to 28V
• Overvoltage Threshold Range: 2.6V to 4.8V (adjustable)
• Undervoltage Threshold Range: 1.8V to 3.9V (adjustable)
• Short-Circuit Detection Threshold: 20mV to 80mV (adjustable)
• Quiescent Current: 10µA (typical)

Pin Configuration

The BQ29732DSET features a 14-pin configuration with the following pin assignments:

1. VDD: Power supply input
2. GND: Ground reference
3. VSS: Negative supply input
4. BAT: Battery connection
5. VC1: Cell 1 voltage monitor
6. VC2: Cell 2 voltage monitor
7. VC3: Cell 3 voltage monitor
8. VC4: Cell 4 voltage monitor
9. SDA: I2C data line
10. SCL: I2C clock line
11. ALERT: Open-drain output for fault indication
12. TS/OCV: Temperature sense or open-circuit voltage selection
13. NTC: Negative temperature coefficient thermistor input
14. VDDP: Power supply input for internal circuitry

Functional Features

• Integrated Voltage Monitoring: Monitors individual cell voltages to ensure they remain within safe limits.
• Fault Detection and Reporting: Detects overvoltage, undervoltage, and short-circuit conditions, providing an alert signal for system response.
• Temperature Sensing: Allows optional temperature monitoring for enhanced safety.
• I2C Interface: Enables communication with a microcontroller or host device for configuration and status monitoring.

Advantages and Disadvantages

Advantages

• Comprehensive Protection: Offers reliable protection against common battery-related issues.
• Customizable Thresholds: Adjustable voltage thresholds allow flexibility in meeting specific application requirements.
• Low Power Consumption: Minimizes power drain on the battery itself.
• Compact Size: Suitable for space-constrained designs.

Disadvantages

• Limited to Lithium-based Batteries: Designed specifically for lithium-ion and lithium-polymer batteries, not compatible with other battery chemistries.
• External Components Required: Additional external components may be needed for complete battery protection implementation.

Working Principles

The BQ29732DSET operates by continuously monitoring the voltage levels of each cell in the battery pack. It compares these voltages against user-configurable thresholds to detect abnormal conditions. When an overvoltage, undervoltage, or short-circuit event is detected, the device triggers an alert signal and takes appropriate action to protect the battery and connected circuitry.

Application Field Plans

The BQ29732DSET finds applications in various electronic devices powered by lithium-ion or lithium-polymer batteries. Some potential application fields include: - Portable consumer electronics (e.g., smartphones, tablets) - Wearable devices (e.g., smartwatches, fitness trackers) - Electric vehicles and hybrid electric vehicles - Power tools and cordless equipment - Medical devices

Alternative Models

For those seeking alternative options, the following models offer similar functionality to the BQ29732DSET: - BQ29731DSET - BQ29733DSET - BQ29734DSET

These alternatives can be considered based on specific requirements and compatibility with the target application.

In conclusion, the BQ29732DSET is a versatile battery protection IC designed for lithium-ion and lithium-polymer batteries. Its comprehensive features, compact size, and customizable thresholds make it suitable for a wide range of applications