BQ24168YFFT - English Editing Encyclopedia Entry

Product Overview

Category

The BQ24168YFFT belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

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

Characteristics

• The BQ24168YFFT is a highly efficient charging IC that supports fast charging protocols.
• It incorporates advanced power management features to optimize charging performance.
• This IC offers protection mechanisms against overvoltage, overcurrent, and overtemperature conditions.
• It supports USB On-The-Go (OTG) functionality, enabling device-to-device charging.

Package and Quantity

The BQ24168YFFT is available in a small form factor package, typically a 20-pin QFN (Quad Flat No-leads) package. It is supplied in reels or trays, with a typical quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 4.35V to 6.45V
• Charging Voltage Range: 3.5V to 4.44V
• Charging Current Range: Up to 3A
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The BQ24168YFFT has the following pin configuration:

1. VBUS: Input voltage from the USB port
2. PGND: Power ground
3. STAT: Status output pin
4. TS: Thermistor input for temperature monitoring
5. ISET: Charging current setting pin
6. BAT: Battery voltage connection
7. SYS: System voltage connection
8. INT: Interrupt output pin
9. SDA: I2C data line
10. SCL: I2C clock line
11. ILIM: Input current limit setting pin
12. TS/NTC: Thermistor input or NTC temperature sensing input
13. VREF: Reference voltage output
14. SRN: Serial resistor network connection
15. EN2: Enable 2 pin
16. EN1: Enable 1 pin
17. PG: Power good output pin
18. IADP: Adapter current limit setting pin
19. D+/D-: USB data lines
20. VOUT: Output voltage connection

Functional Features

The BQ24168YFFT offers the following functional features:

1. High Efficiency Charging: The IC utilizes advanced charging algorithms to maximize charging efficiency and minimize power loss.
2. Fast Charging Support: It supports various fast charging protocols such as Qualcomm Quick Charge, USB Power Delivery, and others.
3. Input Current Limiting: The IC provides input current limiting functionality to protect the power source from overloading.
4. Battery Temperature Monitoring: It incorporates a thermistor input for monitoring the battery temperature and adjusting the charging parameters accordingly.
5. System Voltage Regulation: The IC ensures stable system voltage during charging, preventing voltage drops that could affect device performance.

Advantages and Disadvantages

Advantages

• High charging efficiency leads to reduced charging time.
• Compatibility with multiple fast charging protocols allows for versatile usage.
• Comprehensive protection mechanisms ensure safe charging.
• Compact package size enables integration into space-constrained devices.

Disadvantages

• Limited availability of alternative models may restrict sourcing options.
• Complex pin configuration requires careful PCB layout design.

Working Principles

The BQ24168YFFT operates by regulating the charging current and voltage supplied to the connected lithium-ion battery. It continuously monitors the battery status and adjusts the charging parameters accordingly. The IC employs a switching regulator to efficiently convert the input voltage to the desired charging voltage. Additionally, it incorporates various safety features to protect both the battery and the charging circuitry from potential damage.

Detailed Application Field Plans

The BQ24168YFFT finds extensive application in the following fields:

1. Mobile Devices: Smartphones, tablets, and wearable devices benefit from its fast charging capabilities.
2. Portable Electronics: Power banks, wireless earphones, and handheld gaming consoles can be efficiently charged using this IC.
3. Internet of Things (IoT): Battery-powered IoT devices, such as sensors and trackers, can utilize this IC for reliable charging.

Alternative Models

While the BQ24168YFFT is a highly capable charging IC, alternative models with similar functionalities are available in the market. Some notable alternatives include:

1. BQ25895M: A multi-cell battery charger with USB Type-C support.
2. LTC4000: A high-efficiency standalone battery charger with wide input voltage range.
3. MAX8903A: An integrated charger with power path management for single-cell lithium-ion batteries.

These alternative models offer similar features and can be considered based on specific application requirements.

In conclusion, the BQ24168YFFT is a versatile charging IC designed for efficient and safe