BQ24745RHDRG4 - English Editing Encyclopedia Entry

Product Overview

Category

The BQ24745RHDRG4 belongs to the category of battery charger ICs (Integrated Circuits).

Use

This IC is primarily used for charging and managing rechargeable batteries in various electronic devices.

Characteristics

• The BQ24745RHDRG4 offers high efficiency charging, ensuring optimal battery performance.
• It supports a wide input voltage range, making it suitable for different power sources.
• This IC incorporates advanced safety features to protect the battery from overcharging, overvoltage, and overcurrent conditions.
• It provides accurate monitoring and control of the charging process, enhancing battery lifespan.

Package and Quantity

The BQ24745RHDRG4 is available in a small outline package (SOIC) with a thermal pad. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 4.5V to 24V
• Charging Voltage Range: 3.6V to 24V
• Maximum Charging Current: 8A
• Operating Temperature Range: -40°C to +85°C
• Control Interface: I2C

Pin Configuration

The BQ24745RHDRG4 has a total of 20 pins. Here is the detailed pin configuration:

1. ACIN: Input voltage from the AC adapter.
2. ACOK: AC adapter present indication.
3. ACDET: AC adapter detection input.
4. BAT: Battery voltage sense input.
5. TS: Temperature sense input.
6. SRN: System reset output.
7. SDA: I2C data line.
8. SCL: I2C clock line.
9. VDD: Power supply for internal circuitry.
10. VSS: Ground reference.
11. ILIM: Charging current limit setting.
12. IADP: Adapter current sense input.
13. VREF: Reference voltage output.
14. PROCHOT: Thermal shutdown output.
15. INT: Interrupt output.
16. TS2: Second temperature sense input.
17. SRP: System reset input.
18. SRSET: Soft reset input.
19. BATFET: Battery FET control output.
20. STAT: Charging status indication.

Functional Features

• Dynamic Power Management: The BQ24745RHDRG4 adjusts the charging current based on the system's power requirements, optimizing battery usage.
• Input Current Optimization: It regulates the input current to prevent overloading the AC adapter and ensures efficient power transfer.
• Charge Termination Control: This IC employs advanced algorithms to accurately terminate the charging process when the battery is fully charged, preventing overcharging.
• Temperature Monitoring: It continuously monitors the battery and system temperature, taking necessary actions to prevent overheating.
• Fault Protection: The BQ24745RHDRG4 incorporates various protection mechanisms, such as overvoltage, overcurrent, and short-circuit protection, ensuring safe operation.

Advantages and Disadvantages

Advantages

• High charging efficiency leads to improved battery performance.
• Wide input voltage range allows compatibility with different power sources.
• Advanced safety features protect the battery from potential damage.
• Accurate monitoring and control enhance battery lifespan.

Disadvantages

• Limited maximum charging current may not be suitable for high-power devices.
• Requires an external microcontroller or host system for full functionality.

Working Principles

The BQ24745RHDRG4 operates by regulating the charging current and voltage supplied to the battery. It constantly monitors the battery's state of charge, temperature, and other parameters to ensure optimal charging conditions. The IC communicates with the host system through the I2C interface, allowing for configuration and control of various charging parameters.

Application Field Plans

The BQ24745RHDRG4 is widely used in portable electronic devices, including smartphones, tablets, laptops, and power banks. It finds applications in consumer electronics, industrial equipment, and automotive systems where efficient battery charging and management are crucial.

Alternative Models

Here are some alternative models that offer similar functionality to the BQ24745RHDRG4:

1. BQ24735RGRR
2. BQ24725ARGR
3. BQ24751ARHDT
4. BQ24780SRUYR

These alternatives can be considered based on specific application requirements and availability.

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