BQ24735RGRT - English Editing Encyclopedia Entry

Product Overview

Category

BQ24735RGRT belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

This product is primarily used for power management in various electronic devices, such as laptops, tablets, and smartphones. It provides efficient charging and power delivery capabilities.

Characteristics

• High efficiency: BQ24735RGRT offers high conversion efficiency, ensuring optimal power utilization.
• Advanced protection features: The IC incorporates multiple protection mechanisms, including overvoltage, overcurrent, and overtemperature protection, safeguarding both the device and the battery.
• Flexible charging options: It supports different charging modes, such as constant current (CC), constant voltage (CV), and pre-charge, allowing for versatile charging strategies.
• Wide input voltage range: The IC can handle a wide range of input voltages, making it suitable for various power sources.
• Compact package: BQ24735RGRT comes in a small form factor package, enabling space-efficient integration into electronic devices.

Package and Quantity

The BQ24735RGRT is available in a QFN (Quad Flat No-leads) package. Each package contains one unit of the IC.

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
• Control Interface: I2C

Pin Configuration

The BQ24735RGRT has a total of 20 pins. Here is the detailed pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. TS: Thermistor input for temperature monitoring
4. ACOK: AC adapter present status output
5. ACSEL: AC adapter selection input
6. SRN: Synchronous rectifier control pin
7. SRP: Synchronous rectifier control pin
8. SRSET: Synchronous rectifier control pin
9. BAT: Battery voltage sense pin
10. IADP: Adapter current sense pin
11. VREF: Reference voltage output
12. VDD: Power supply for internal circuitry
13. SDA: I2C data line
14. SCL: I2C clock line
15. INT: Interrupt output
16. PGOOD: Power good output
17. CHG: Charge enable control pin
18. TS1: Thermistor input for temperature monitoring
19. TS2: Thermistor input for temperature monitoring
20. VSS: Ground pin

Functional Features

• Dynamic Power Management: BQ24735RGRT dynamically adjusts the charging parameters based on the device's power requirements, optimizing the charging process.
• System Status Monitoring: The IC continuously monitors various system parameters, including battery voltage, charging current, and temperature, ensuring safe and efficient operation.
• I2C Interface: It features an I2C interface for easy communication with the host system, allowing for real-time control and monitoring of the charging process.
• Fault Detection and Protection: The IC incorporates comprehensive fault detection mechanisms to identify and protect against abnormal conditions, preventing potential damage to the device or battery.

Advantages and Disadvantages

Advantages

• High efficiency charging
• Advanced protection features
• Flexible charging options
• Wide input voltage range
• Compact package size

Disadvantages

• Requires I2C interface support in the host system
• Limited charging current compared to some high-power devices

Working Principles

BQ24735RGRT operates by regulating the charging process based on the input voltage, battery status, and system requirements. It utilizes a combination of switching regulators, control logic, and protection circuits to efficiently manage the power flow.

When an AC adapter is connected, the IC detects its presence through the ACOK pin. It then adjusts the charging parameters, such as current and voltage, to deliver optimal power to the battery. The I2C interface allows for real-time communication with the host system, enabling monitoring and control of the charging process.

The IC continuously monitors the battery voltage, temperature, and charging current to ensure safe operation. It incorporates various protection mechanisms, such as overvoltage and overcurrent protection, to safeguard both the device and the battery from potential damage.

Detailed Application Field Plans

BQ24735RGRT finds extensive application in the following fields:

1. Laptops and Notebooks: It provides efficient and reliable charging capabilities for laptop batteries, ensuring extended battery life and optimal performance.
2. Tablets and Smartphones: The IC enables fast and safe charging of portable devices, enhancing user convenience and productivity.
3. Power Banks: BQ24735RGRT can be used in power bank designs to efficiently charge