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BQ29718DSET
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BQ29718DSET

Product Overview

Category

BQ29718DSET 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.

Characteristics

  • Integrated circuit for battery protection
  • Designed for lithium-ion and lithium-polymer batteries
  • Protects against overcharging, over-discharging, and short-circuiting

Package

BQ29718DSET comes in a small outline package (SOT) with 8 pins.

Essence

The essence of this product lies in its ability to safeguard lithium-ion and lithium-polymer batteries by preventing potential hazards such as overcharging, over-discharging, and short-circuiting.

Packaging/Quantity

BQ29718DSET is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

  • Input Voltage Range: 2.5V to 26V
  • Overvoltage Threshold: 4.1V to 4.6V (programmable)
  • Undervoltage Threshold: 2.2V to 3.9V (programmable)
  • Overcurrent Threshold: 10mA to 100mA (programmable)
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

  1. VDD: Power supply input
  2. GND: Ground reference
  3. BAT: Battery connection
  4. PROG: Programming pin for setting thresholds
  5. STAT: Status output indicating battery condition
  6. FLT: Fault output indicating fault conditions
  7. TS: Thermistor input for temperature monitoring
  8. SDA/SCL: I2C communication interface

Functional Features

  • Overvoltage protection: Prevents battery damage by disconnecting the load when the voltage exceeds the programmed threshold.
  • Undervoltage protection: Cuts off the load when the battery voltage drops below the set threshold, preventing deep discharge.
  • Overcurrent protection: Detects excessive current flow and interrupts the circuit to avoid damage to the battery and connected devices.
  • Temperature monitoring: Monitors the battery temperature through an external thermistor to prevent overheating.

Advantages and Disadvantages

Advantages

  • Comprehensive battery protection against overcharging, over-discharging, and short-circuiting.
  • Programmable thresholds allow customization for different battery types and applications.
  • Integrated I2C interface enables communication with a microcontroller for advanced control and monitoring.

Disadvantages

  • Requires additional components (thermistor) for temperature monitoring.
  • Limited to lithium-ion and lithium-polymer batteries, not suitable for other battery chemistries.

Working Principles

BQ29718DSET operates based on a combination of voltage and current monitoring. It continuously measures the battery voltage and compares it to the programmed thresholds. If any threshold is exceeded, the corresponding protection mechanism is triggered, disconnecting the load or signaling a fault condition.

Detailed Application Field Plans

The BQ29718DSET is widely used in various applications that require battery protection, including:

  1. Portable electronic devices: Smartphones, tablets, laptops, and digital cameras.
  2. Electric vehicles: Electric cars, e-bikes, and electric scooters.
  3. Power banks: Portable chargers for mobile devices.
  4. Energy storage systems: Solar power systems, uninterruptible power supplies (UPS), and backup power solutions.

Detailed and Complete Alternative Models

  1. BQ29718DSER: Similar to BQ29718DSET but comes in a different package (DFN).
  2. BQ29718DSGT: Offers additional features like cell balancing and fuel gauge functionality.
  3. BQ29718DSQR: Provides enhanced ESD protection for improved reliability.

These alternative models offer similar battery protection capabilities but may differ in package type, additional features, or level of integration.

In conclusion, the BQ29718DSET is a highly reliable integrated circuit designed for battery protection in lithium-ion and lithium-polymer batteries. Its programmable thresholds, comprehensive features, and wide range of applications make it an ideal choice for ensuring the safety and longevity of battery-powered devices.

Énumérez 10 questions et réponses courantes liées à l'application de BQ29718DSET dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of BQ29718DSET in technical solutions:

  1. Q: What is the BQ29718DSET? A: The BQ29718DSET is a battery protection and authentication IC designed for use in lithium-ion battery packs.

  2. Q: What is the purpose of the BQ29718DSET? A: The BQ29718DSET provides overvoltage, undervoltage, and overcurrent protection for lithium-ion battery cells, ensuring safe operation and preventing damage.

  3. Q: How does the BQ29718DSET protect against overvoltage? A: The BQ29718DSET monitors the voltage of each battery cell and disconnects the load if any cell's voltage exceeds a predetermined threshold.

  4. Q: Can the BQ29718DSET handle high currents? A: Yes, the BQ29718DSET can handle high continuous discharge currents up to 10A.

  5. Q: Does the BQ29718DSET support balancing of battery cells? A: No, the BQ29718DSET does not have built-in cell balancing functionality. It focuses on protection and authentication features.

  6. Q: How does the BQ29718DSET authenticate battery packs? A: The BQ29718DSET uses an internal memory to store unique pack information, allowing it to verify the authenticity of the battery pack.

  7. Q: Can the BQ29718DSET communicate with a microcontroller or host system? A: Yes, the BQ29718DSET supports I2C communication, enabling integration with a microcontroller or host system for monitoring and control purposes.

  8. Q: What is the operating voltage range of the BQ29718DSET? A: The BQ29718DSET operates within a voltage range of 2.5V to 20V.

  9. Q: Is the BQ29718DSET suitable for automotive applications? A: Yes, the BQ29718DSET is designed to meet the stringent requirements of automotive applications, including AEC-Q100 qualification.

  10. Q: Are there any evaluation boards or reference designs available for the BQ29718DSET? A: Yes, Texas Instruments provides evaluation modules and reference designs that can help developers quickly prototype and implement the BQ29718DSET in their applications.

Please note that these answers are general and may vary depending on specific implementation details and requirements.