Texas Instruments
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BQ24257RGET
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BQ24257RGET

Product Overview

Category

The BQ24257RGET belongs to the category of integrated circuits (ICs) and is specifically designed for battery charging applications.

Use

This IC is commonly used in portable electronic devices such as smartphones, tablets, and wearable devices to efficiently charge lithium-ion batteries.

Characteristics

  • High charging efficiency
  • Fast charging capability
  • Integrated power path management
  • Thermal regulation for safe charging
  • Overvoltage and overcurrent protection

Package

The BQ24257RGET is available in a small 24-pin QFN package, which allows for compact designs and easy integration into various electronic devices.

Essence

The essence of the BQ24257RGET lies in its ability to provide efficient and reliable charging for lithium-ion batteries, ensuring optimal performance and safety.

Packaging/Quantity

This IC is typically sold in reels or tubes, with each reel containing a specific quantity of BQ24257RGET ICs. The exact quantity may vary depending on the supplier.

Specifications

  • Input voltage range: 4.35V to 6.45V
  • Charging current range: Up to 2A
  • Programmable charging parameters
  • Battery temperature monitoring
  • USB detection and enumeration

Detailed Pin Configuration

  1. VBUS: Input voltage from USB source
  2. PGND: Power ground
  3. STAT: Status output pin
  4. TS: Thermistor input for battery temperature monitoring
  5. ISET: Charging current setting pin
  6. EN2: Enable pin for second-stage charging
  7. EN1: Enable pin for first-stage charging
  8. BAT: Battery connection pin
  9. SYS: System output voltage
  10. INT: Interrupt output pin
  11. SDA: I2C data line
  12. SCL: I2C clock line
  13. TS/NTC: Thermistor input or NTC thermistor connection
  14. VSS: Ground pin
  15. ILIM: Input current limit setting pin
  16. VBUS_STAT: USB detection output pin
  17. D+/D-: USB data lines
  18. AC/DPDM: Accessory detection input
  19. AC/DP: Accessory detection output
  20. VBUS_DISCHG: VBUS discharge control pin
  21. VBUS_OTG: VBUS OTG control pin
  22. VBUS_CHG: VBUS charging control pin
  23. VBUS_IN: Input voltage from external power source
  24. PGND: Power ground

Functional Features

  1. Integrated power path management allows simultaneous charging and discharging.
  2. Dynamic power management optimizes charging efficiency based on battery and system conditions.
  3. Thermal regulation prevents overheating during charging, ensuring safe operation.
  4. USB detection and enumeration enable compatibility with various USB devices.
  5. Overvoltage and overcurrent protection safeguard the battery and connected devices.

Advantages and Disadvantages

Advantages

  • High charging efficiency leads to faster charging times.
  • Integrated power path management enables device usage while charging.
  • Thermal regulation ensures safe and reliable charging.
  • Programmable charging parameters offer flexibility for different battery types.
  • USB detection and enumeration enhance compatibility with USB devices.

Disadvantages

  • Limited availability of alternative models may restrict design options.
  • Complex pin configuration requires careful PCB layout and routing.

Working Principles

The BQ24257RGET operates by regulating the charging current and voltage supplied to the lithium-ion battery. It utilizes a combination of power path management, thermal regulation, and safety features to ensure efficient and safe charging. The IC communicates with the battery and system through an I2C interface, allowing for dynamic power management and programmable charging parameters.

Detailed Application Field Plans

The BQ24257RGET is widely used in various portable electronic devices, including: - Smartphones - Tablets - Wearable devices - Portable gaming consoles - Bluetooth headphones

Detailed and Complete Alternative Models

  1. BQ24250RGET
  2. BQ24251RGET
  3. BQ24252RGET
  4. BQ24253RGET
  5. BQ24254RGET

These alternative models offer similar functionality and can be considered as replacements for the BQ24257RGET in specific applications.

In conclusion, the BQ24257RGET is a highly efficient and versatile IC designed for battery charging applications in portable electronic devices. Its integrated power path management, thermal regulation, and safety features make it an ideal choice for fast and reliable charging of lithium-ion batteries.

Énumérez 10 questions et réponses courantes liées à l'application de BQ24257RGET dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of BQ24257RGET in technical solutions:

  1. Question: What is the BQ24257RGET?
    Answer: The BQ24257RGET is a highly integrated single-cell Li-Ion battery charger and system power path management device.

  2. Question: What is the input voltage range for the BQ24257RGET?
    Answer: The input voltage range is from 3.9V to 6.45V.

  3. Question: What is the maximum charging current supported by the BQ24257RGET?
    Answer: The maximum charging current is programmable up to 2A.

  4. Question: Can the BQ24257RGET charge multiple battery chemistries?
    Answer: No, it is specifically designed for single-cell Li-Ion batteries.

  5. Question: Does the BQ24257RGET support USB On-The-Go (OTG) functionality?
    Answer: Yes, it supports OTG functionality for powering external devices.

  6. Question: Is the BQ24257RGET capable of thermal regulation during charging?
    Answer: Yes, it has built-in thermal regulation to prevent overheating.

  7. Question: Can the BQ24257RGET operate while charging the battery?
    Answer: Yes, it supports simultaneous charging and system operation.

  8. Question: Does the BQ24257RGET have overvoltage protection?
    Answer: Yes, it has overvoltage protection to safeguard the battery and connected devices.

  9. Question: Can the BQ24257RGET be used in portable electronic devices?
    Answer: Yes, it is suitable for various portable applications such as smartphones, tablets, and wearables.

  10. Question: What is the package type of the BQ24257RGET?
    Answer: It comes in a 24-pin VQFN package, making it compact and easy to integrate into designs.

Please note that these answers are general and may vary depending on the specific implementation and requirements of your technical solution.