Texas Instruments
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BQ24205DGN
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BQ24205DGN

Product Overview

Category

BQ24205DGN belongs to the category of integrated circuits (ICs) 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 efficiency: The BQ24205DGN offers high charging efficiency, minimizing energy loss during the charging process.
  • Fast charging: It supports fast charging protocols, allowing for quicker battery recharge times.
  • Compact package: The IC comes in a small form factor package, making it suitable for space-constrained designs.
  • Integrated protection features: It incorporates various protection mechanisms to safeguard the battery and the charging circuitry against overvoltage, overcurrent, and overheating.

Package and Quantity

The BQ24205DGN is available in a 8-pin plastic dual in-line package (PDIP). It is typically sold in reels containing a specified quantity of ICs.

Specifications

  • Input voltage range: 4.35V to 6.45V
  • Charging voltage range: 3.5V to 4.44V
  • Charging current range: 500mA to 2A
  • Operating temperature range: -40°C to 85°C
  • Standby current: < 100µA

Pin Configuration

The BQ24205DGN features the following pin configuration:

  1. VIN: Input voltage pin
  2. GND: Ground pin
  3. ISET: Charging current setting pin
  4. STAT: Status indication pin
  5. TS: Temperature sensing pin
  6. VBAT: Battery voltage monitoring pin
  7. PG: Power good indication pin
  8. VOUT: Output voltage pin

Functional Features

  • Constant current/constant voltage (CC/CV) charging algorithm
  • Thermal regulation and protection
  • Battery temperature monitoring
  • Charge termination based on battery voltage and current thresholds
  • Programmable charging current limit
  • Reverse boost capability for USB On-The-Go (OTG) applications

Advantages and Disadvantages

Advantages

  • High charging efficiency leads to reduced energy consumption.
  • Fast charging capability allows for shorter charging times.
  • Integrated protection features ensure safe charging and prevent damage to the battery and circuitry.
  • Compact package size enables space-saving designs.

Disadvantages

  • Limited input voltage range may not be suitable for all applications requiring higher input voltages.
  • The IC's thermal regulation may result in reduced charging speed under high ambient temperatures.

Working Principles

The BQ24205DGN operates by regulating the charging current and voltage supplied to the lithium-ion battery. It employs a CC/CV charging algorithm, where it initially provides a constant current until the battery voltage reaches a predetermined threshold. Afterward, it switches to a constant voltage mode to complete the charging process.

The IC continuously monitors the battery temperature and adjusts the charging parameters accordingly to prevent overheating. It also incorporates various protection mechanisms to safeguard against overvoltage, overcurrent, and short circuits.

Detailed Application Field Plans

The BQ24205DGN is widely used in various portable electronic devices, including smartphones, tablets, smartwatches, and wireless earphones. Its compact size and efficient charging capabilities make it suitable for space-constrained designs where fast charging is desired.

Alternative Models

  • BQ24205RGTR: Similar specifications and features, but available in a smaller 16-pin QFN package.
  • BQ24206DGN: Offers additional USB OTG functionality along with similar charging capabilities.
  • BQ24207DGN: Provides higher charging current range for faster charging times.

These alternative models can be considered based on specific design requirements and application needs.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de BQ24205DGN en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of BQ24205DGN in technical solutions:

  1. Q: What is the BQ24205DGN? A: The BQ24205DGN is a highly integrated single-cell Li-Ion battery charger and system power path management device.

  2. Q: What is the input voltage range for the BQ24205DGN? A: The input voltage range is from 3.9V to 6.45V.

  3. Q: What is the maximum charging current supported by the BQ24205DGN? A: The BQ24205DGN supports a maximum charging current of 2A.

  4. Q: Can the BQ24205DGN charge the battery while the system is powered on? A: Yes, the BQ24205DGN supports simultaneous charging and system operation.

  5. Q: Does the BQ24205DGN have overvoltage protection? A: Yes, the BQ24205DGN has built-in overvoltage protection to prevent damage to the battery.

  6. Q: Can the BQ24205DGN be used with different battery chemistries? A: No, the BQ24205DGN is specifically designed for single-cell Li-Ion batteries.

  7. Q: Does the BQ24205DGN have thermal regulation? A: Yes, the BQ24205DGN has built-in thermal regulation to prevent overheating during charging.

  8. Q: What is the purpose of the system power path management feature? A: The system power path management feature allows the BQ24205DGN to power the system directly from the input source, even if the battery is not present or is deeply discharged.

  9. Q: Can the BQ24205DGN be used in portable devices? A: Yes, the BQ24205DGN is commonly used in portable devices such as smartphones, tablets, and wearable devices.

  10. Q: Does the BQ24205DGN support USB On-The-Go (OTG) functionality? A: No, the BQ24205DGN does not support USB OTG functionality. It is primarily a battery charger and power management device.

Please note that these answers are general and may vary depending on the specific implementation and configuration of the BQ24205DGN in a technical solution.