BQ24725RGRR - English Editing Encyclopedia Entry

Product Overview

Category

The BQ24725RGRR belongs to the category of power management integrated circuits (PMICs).

Use

This PMIC is primarily used for battery charging and system power management in portable electronic devices.

Characteristics

• The BQ24725RGRR offers high efficiency and precision charging capabilities.
• It supports multiple battery chemistries, such as lithium-ion, lithium-polymer, and nickel-based batteries.
• This PMIC provides protection features like overvoltage, overcurrent, and overtemperature protection.
• It incorporates a dynamic power path management feature that allows simultaneous charging and discharging.

Package and Essence

The BQ24725RGRR is available in a small outline package (SOP) with 20 pins. Its essence lies in its ability to efficiently manage power flow between the input source, battery, and load.

Packaging/Quantity

This PMIC is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 24V
• Output Voltage Range: 3.3V to 25.2V
• Charging Current Range: Up to 8A
• Operating Temperature Range: -40°C to 85°C
• Efficiency: Up to 95%

Detailed Pin Configuration

1. VCC: Power supply input
2. ACSEL: Input voltage selection pin
3. TS: Thermistor input for temperature monitoring
4. BAT: Battery voltage sense input
5. SRN: System reset output
6. SDA: I2C data line
7. SCL: I2C clock line
8. INT: Interrupt output
9. ILIM: Current limit setting pin
10. PROCHOT: Thermal shutdown output
11. TS2: Second thermistor input
12. BATFET: Battery FET control pin
13. ACOK: AC adapter present indication
14. ACDET: AC adapter detection input
15. PGOOD: Power good output
16. VREF: Reference voltage output
17. ISET: Current sense resistor connection
18. SDA2: Second I2C data line
19. SCL2: Second I2C clock line
20. GND: Ground

Functional Features

1. Dynamic Power Path Management: Enables simultaneous charging and discharging, allowing the system to operate even when the battery is depleted.
2. Input Source Selection: Automatically selects the power source (AC adapter or battery) based on availability and priority.
3. High Efficiency Charging: Utilizes advanced charging algorithms to maximize charging efficiency and minimize heat dissipation.
4. Comprehensive Protection: Incorporates various protection mechanisms like overvoltage, overcurrent, and overtemperature protection to safeguard the device and battery.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows compatibility with various power sources.
• Supports multiple battery chemistries, providing flexibility for different device requirements.
• Efficient power management ensures optimal charging and longer battery life.
• Comprehensive protection features enhance device safety and reliability.

Disadvantages

• Limited charging current compared to some high-power devices.
• Requires proper thermal management due to potential heat generation during high-current charging.

Working Principles

The BQ24725RGRR operates by intelligently managing power flow between the input source, battery, and load. It continuously monitors the input voltage, battery status, and system requirements to optimize charging and power delivery. The PMIC dynamically adjusts the charging current and voltage levels to ensure efficient and safe charging while protecting the battery from overcharging or overheating.

Detailed Application Field Plans

The BQ24725RGRR is widely used in various portable electronic devices, including: - Laptops and notebooks - Tablets and smartphones - Portable gaming consoles - Digital cameras and camcorders - Portable medical devices

Detailed and Complete Alternative Models

1. BQ24725RHDR: Similar to BQ24725RGRR but available in a different package (QFN).
2. BQ24727RGRR: Upgraded version with additional features like USB Type-C support.
3. BQ24730RGRR: Higher charging current capability for power-hungry devices.

These alternative models offer similar functionality and can be considered as alternatives based on specific requirements.

In conclusion, the BQ24725RGRR is a versatile power management integrated circuit designed for efficient battery charging and system power management in portable electronic devices. Its advanced features, comprehensive protection mechanisms, and compatibility with multiple battery chemistries make it an ideal choice for various applications.

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