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BQ21040DBVT
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BQ21040DBVT

Product Overview

The BQ21040DBVT is a battery charger IC designed for use in portable electronic devices. This device falls under the category of integrated circuits and is commonly used to charge single-cell Li-ion or Li-polymer batteries. Its characteristics include high efficiency, compact package size, and low power consumption. The BQ21040DBVT is available in a small SOT-23 package and is typically sold in reels of 3000 units.

Specifications

  • Input Voltage Range: 4.35V to 6.5V
  • Charge Voltage: 4.2V
  • Maximum Charge Current: 500mA
  • Operating Temperature Range: -40°C to 85°C

Pin Configuration

The BQ21040DBVT features a 5-pin SOT-23 package with the following pin configuration: 1. VIN (Input voltage) 2. GND (Ground) 3. TS (Thermal shutdown) 4. BAT (Battery) 5. STAT (Status indicator)

Functional Features

  • Integrated power FET
  • Thermal regulation and protection
  • Automatic recharge
  • Charge status indication

Advantages and Disadvantages

Advantages

  • Small package size
  • High efficiency
  • Automatic recharge feature

Disadvantages

  • Limited maximum charge current
  • Restricted input voltage range

Working Principles

The BQ21040DBVT operates by regulating the charging current and voltage to ensure safe and efficient charging of Li-ion or Li-polymer batteries. It incorporates thermal regulation to prevent overheating and includes an automatic recharge feature to maintain the battery's charge level.

Application Field Plans

The BQ21040DBVT is widely used in various portable electronic devices such as smartphones, tablets, portable media players, and handheld gaming consoles. Its compact size and efficient charging capabilities make it suitable for applications where space and power consumption are critical factors.

Alternative Models

Some alternative models to the BQ21040DBVT include: - BQ24075 - MCP73831 - MAX1555

In conclusion, the BQ21040DBVT is a versatile battery charger IC with a compact design and efficient charging capabilities, making it an ideal choice for a wide range of portable electronic devices.

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Sebutkan 10 pertanyaan dan jawaban umum terkait penerapan BQ21040DBVT dalam solusi teknis

  1. What is the BQ21040DBVT?

    • The BQ21040DBVT is a highly integrated Li-Ion linear charger for single-cell applications.

  2. What is the input voltage range of the BQ21040DBVT?

    • The input voltage range of the BQ21040DBVT is 4.35V to 6.5V.

  3. What is the maximum charge current of the BQ21040DBVT?

    • The maximum charge current of the BQ21040DBVT is 500mA.

  4. Does the BQ21040DBVT support USB On-The-Go (OTG) applications?

    • Yes, the BQ21040DBVT supports USB OTG applications.

  5. What is the thermal regulation feature of the BQ21040DBVT?

    • The BQ21040DBVT has a thermal regulation feature that reduces the charge current to prevent the device from overheating.

  6. What is the minimum battery voltage required for charging with the BQ21040DBVT?

    • The minimum battery voltage required for charging with the BQ21040DBVT is 3.5V.

  7. Does the BQ21040DBVT have an integrated power FET?

    • Yes, the BQ21040DBVT has an integrated power FET.

  8. What is the status indication feature of the BQ21040DBVT?

    • The BQ21040DBVT provides status indication through an open-drain CHG pin.

  9. What are the safety features of the BQ21040DBVT?

    • The BQ21040DBVT includes overvoltage protection, overcurrent protection, and thermal shutdown for safety.

  10. Is the BQ21040DBVT suitable for portable electronic devices?

    • Yes, the BQ21040DBVT is suitable for a wide range of portable electronic devices such as smartphones, tablets, and portable media players.