BQ24172RGYR

Product Overview

Category

The BQ24172RGYR 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 BQ24172RGYR incorporates advanced charging algorithms and power management techniques to optimize the charging process and maximize energy conversion efficiency.
• Fast charging capability: This IC supports fast charging protocols, such as Qualcomm Quick Charge, enabling rapid charging of compatible devices.
• Compact package: The BQ24172RGYR is available in a small 20-pin VQFN package, making it suitable for space-constrained designs.
• Integrated protection features: It includes built-in safety mechanisms like overvoltage protection, overcurrent protection, and thermal regulation to ensure safe and reliable charging.

Package and Quantity

The BQ24172RGYR is supplied in a 20-pin VQFN package. It is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input voltage range: 4.35V to 6.45V
• Charging voltage range: 3.5V to 4.44V
• Maximum charging current: 2A
• Operating temperature range: -40°C to 85°C
• Standby current: <10µA

Pin Configuration

The BQ24172RGYR has a total of 20 pins, each serving a specific function. The pin configuration is as follows:

1. VIN: Input voltage
2. GND: Ground
3. TS: Thermistor input for temperature monitoring
4. ISET: Current limit setting
5. STAT: Charging status indicator
6. PG: Power good output
7. VBUS: USB input voltage
8. SDA: I2C data line
9. SCL: I2C clock line
10. INT: Interrupt output
11. TS/DPDM: Thermistor input or USB D+/D- detection
12. BAT: Battery connection
13. ILIM: Current limit programming resistor
14. PROG: Programming pin for various features
15. EN/SET: Enable and setting pin
16. SRN: Serial register number
17. VREF: Reference voltage output
18. VOUT: Output voltage
19. SYS: System voltage output
20. GND: Ground

Functional Features

1. Advanced Charging Algorithms: The BQ24172RGYR incorporates sophisticated charging algorithms to optimize the charging process, ensuring maximum battery life and efficiency.
2. Fast Charging Support: It is compatible with various fast charging protocols, allowing devices to charge quickly and efficiently.
3. Integrated Protection Mechanisms: The IC includes multiple protection features like overvoltage, overcurrent, and thermal protection, safeguarding both the battery and the device during charging.
4. Power Path Management: The BQ24172RGYR enables simultaneous charging of the battery and powering the device, even when the input power source is limited.
5. Dynamic Power Management: It dynamically adjusts the charging current based on the available input power, maximizing charging speed without exceeding the power source's capabilities.

Advantages and Disadvantages

Advantages

• High charging efficiency leads to reduced energy consumption and longer battery life.
• Fast charging capability allows for quick recharging of devices.
• Compact package size facilitates integration into space-constrained designs.
• Integrated protection mechanisms ensure safe and reliable charging.

Disadvantages

• Limited compatibility with certain charging protocols or devices that require higher charging currents.
• Relatively higher cost compared to standard charging ICs.

Working Principles

The BQ24172RGYR operates based on a combination of power management techniques and charging algorithms. It regulates the charging process by monitoring various parameters such as battery voltage, current, and temperature. The IC dynamically adjusts the charging current and voltage to optimize the charging efficiency while ensuring the battery's safety.

When connected to an input power source, the IC detects the type of power source (USB or adapter) and initiates the charging process accordingly. It continuously monitors the battery's state and adjusts the charging parameters to prevent overcharging, overcurrent, and overheating.

Detailed Application Field Plans

The BQ24172RGYR is widely used in various portable electronic devices, including: - Smartphones - Tablets - Wearable devices (smartwatches, fitness trackers) - Portable gaming consoles - Bluetooth headphones/speakers - GPS navigation devices

Detailed and Complete Alternative Models

1. BQ24170RGYR: Similar to BQ24172RGYR but with a lower maximum charging current of 1.5A. 2