BQ24171RGYR - English Editing Encyclopedia Entry

Product Overview

Category

BQ24171RGYR belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This product is primarily used for charging lithium-ion and lithium-polymer batteries in various electronic devices such as smartphones, tablets, portable media players, and other portable electronic devices.

Characteristics

• The BQ24171RGYR is a highly efficient battery charger with an integrated power path management feature.
• It supports single-cell Li-Ion and Li-Polymer batteries.
• The device operates from a wide input voltage range, making it suitable for various power sources.
• It incorporates a high-performance switching regulator that enables fast and efficient charging.
• The charger also includes multiple safety features to protect the battery and the device being charged.

Package and Quantity

The BQ24171RGYR is available in a small 20-pin VQFN package. It is typically sold in reels or tubes containing a specific quantity of units, depending on the manufacturer's packaging standards.

Specifications

• Input Voltage Range: 3.9V to 17V
• Charging Voltage Range: 3.5V to 4.44V
• Maximum Charging Current: 2A
• Operating Temperature Range: -40°C to 85°C
• Integrated Safety Features: Overvoltage protection, overcurrent protection, thermal regulation, and battery temperature monitoring.

Pin Configuration

The BQ24171RGYR has a total of 20 pins, each serving a specific function. Here is a detailed pin configuration:

1. VIN: Input voltage pin
2. PGND: Power ground
3. SYS: System output voltage
4. STAT: Charging status indicator
5. ISET: Charging current setting
6. TS: Battery temperature sense
7. VSS: Ground
8. VDD: Supply voltage
9. EN/SET: Enable and I2C interface pin
10. SDA: I2C data line
11. SCL: I2C clock line
12. ILIM: Input current limit setting
13. TS/NTC: Battery temperature sense or NTC thermistor input
14. BAT: Battery connection
15. TS2: Second battery temperature sense
16. VBUS: USB input voltage
17. D+/D-: USB data lines
18. SRN/SRP: Switching regulator output
19. PG: Power good indicator
20. GND: Ground

Functional Features

The BQ24171RGYR offers several functional features that enhance its performance as a battery charger:

1. Integrated Power Path Management: Allows the device to power the system directly from the input source while simultaneously charging the battery.
2. Dynamic Power Management: Optimizes the charging current based on the available input power, maximizing charging efficiency.
3. Thermal Regulation: Monitors the temperature of the battery and adjusts the charging current accordingly to prevent overheating.
4. Charge Termination: Automatically stops charging when the battery is fully charged, preventing overcharging and extending battery life.
5. Safety Protection: Incorporates various safety mechanisms to protect against overvoltage, overcurrent, and thermal issues.

Advantages and Disadvantages

Advantages

• High charging efficiency, reducing charging time.
• Integrated power path management enables simultaneous charging and device usage.
• Wide input voltage range allows compatibility with various power sources.
• Multiple safety features protect the battery and the device being charged.

Disadvantages

• Limited to single-cell Li-Ion and Li-Polymer batteries.
• Requires additional external components for complete charging circuit implementation.

Working Principles

The BQ24171RGYR operates based on a switching regulator architecture. It converts the input voltage to a regulated output voltage suitable for charging the battery. The device employs a pulse-width modulation (PWM) technique to control the charging current and maintain optimal charging efficiency. It continuously monitors the battery voltage, temperature, and charging status to ensure safe and efficient charging.

Application Field Plans

The BQ24171RGYR finds extensive application in various portable electronic devices that utilize lithium-ion or lithium-polymer batteries. Some of the key application fields include:

1. Smartphones and Tablets
2. Portable Media Players
3. Wearable Devices
4. Bluetooth Headsets
5. Portable Gaming Consoles

Alternative Models

For users seeking alternative options, here are some detailed and complete alternative models to consider:

1. BQ24075RGTT
2. MCP73831T-2ACI/OT
3. LTC4054LES5-4.2#TRMPBF
4. MAX1555EZK+T
5. TPS2513EVM-001

These alternative models offer similar functionality and can be considered