BQ29729DSET

Product Overview

Category

BQ29729DSET 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 or lithium-polymer batteries from overcharging, over-discharging, and short-circuiting. It ensures the safe and efficient operation of rechargeable batteries in various electronic devices.

Characteristics

• Battery protection: Prevents overcharging, over-discharging, and short-circuiting.
• Voltage monitoring: Monitors the battery voltage to maintain optimal performance.
• Temperature sensing: Detects abnormal temperature conditions to prevent damage.
• Low power consumption: Operates with minimal power consumption to maximize battery life.
• Compact size: Designed to be small and lightweight for easy integration into electronic devices.

Package

The BQ29729DSET is available in a small outline package (SOP) format, which facilitates its installation on printed circuit boards (PCBs).

Essence

The essence of the BQ29729DSET lies in its ability to protect lithium-ion or lithium-polymer batteries by monitoring voltage levels, temperature, and current flow. It ensures the longevity and safety of batteries used in electronic devices.

Packaging/Quantity

The BQ29729DSET is typically packaged in reels or tubes, containing a specific quantity of ICs per package. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Input voltage range: 2.5V - 4.8V
• Overcharge detection voltage: 4.25V ± 25mV
• Overdischarge detection voltage: 2.4V ± 80mV
• Overcurrent detection threshold: 10A ± 1A
• Operating temperature range: -40°C to +85°C
• Quiescent current: 5µA (typical)

Detailed Pin Configuration

The BQ29729DSET has the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. BAT: Battery connection
4. OUT: Output for controlling external circuitry
5. SDA: Serial data input/output for communication
6. SCL: Serial clock input for communication
7. TS: Temperature sense input
8. NTC: Negative temperature coefficient input

Functional Features

• Overcharge protection: Monitors battery voltage and prevents overcharging by disconnecting the charging source.
• Overdischarge protection: Detects low battery voltage and disconnects the load to prevent excessive discharge.
• Short-circuit protection: Safeguards against short circuits by interrupting the current flow.
• Temperature monitoring: Measures battery temperature and triggers protective actions if abnormal conditions are detected.
• Communication interface: Supports serial communication for configuring and retrieving information from the IC.

Advantages and Disadvantages

Advantages

• Reliable battery protection: Ensures the safety and longevity of lithium-ion or lithium-polymer batteries.
• Compact size: Allows for easy integration into various electronic devices.
• Low power consumption: Maximizes battery life by operating with minimal power requirements.
• Temperature sensing: Provides an additional layer of protection by monitoring battery temperature.

Disadvantages

• Limited compatibility: Designed specifically for lithium-ion or lithium-polymer batteries, may not be suitable for other battery chemistries.
• Requires additional components: May need external resistors or capacitors for proper operation in certain applications.

Working Principles

The BQ29729DSET operates based on a combination of voltage, current, and temperature monitoring. It continuously measures the battery voltage and compares it to predefined thresholds to detect overcharging and overdischarging conditions. Additionally, it monitors the battery temperature to prevent damage caused by excessive heat. When any abnormal condition is detected, the IC takes appropriate actions to protect the battery and connected circuitry.

Detailed Application Field Plans

The BQ29729DSET finds applications in various electronic devices that utilize lithium-ion or lithium-polymer batteries. Some common application fields include:

1. Portable electronics: Smartphones, tablets, laptops, and portable gaming devices.
2. Power tools: Cordless drills, electric screwdrivers, and other battery-powered tools.
3. Electric vehicles: Electric bicycles, scooters, and small electric cars.
4. Energy storage systems: Battery banks for renewable energy sources like solar or wind power.

Detailed and Complete Alternative Models

1. BQ29730DSET: Similar to BQ29729DSET with additional features for enhanced battery protection.
2. BQ29731DSET: Advanced battery protection IC with extended operating temperature range.
3. BQ29732DSET: Higher voltage rating variant suitable for specific applications.

These alternative models offer similar functionality to the BQ29729DSET but may have additional features or specifications tailored to specific requirements