BQ25122YFPT

Series:	*
Part Status:	Active

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Introduction

Power Management IC (PMIC) - Battery Chargers are a vital component in today\'s electronic systems, providing a reliable and secure charging mechanism for a variety of inputs. the BQ25122YFTP is a highly integrated, single-cell system that offers a fully featured solution specifically designed to meet the needs of portable consumer-type products. BQ25122YFTP provides a valuable alternative to traditional linear and switch-mode chargers, enabling significant decreases in size and cost, while still providing the necessary protection for your battery.The BQ25122YFTP supports a wide range of input sources, including but not limited to USB, AC/DC adapters, solar panels and more. The BQ25122YFTP uses a high-efficiency synchronous buck converter to produce a 4.2V charge voltage, with a selectable charge current up to 1.5A. The integrated pass-through buck/boost converter enables charging from non-standard battery chemistries employing different charge voltages. The BQ25122YFTP also includes comprehensive protection and charging phases, allowing safe and reliable operation.

Features

The BQ25122YFTP is an integrated single-cell system solution, offering a specialised package tailored to the specific application needs. Its features make it suitable to be used with a range of micro-processors, including 32-bit ARM MCUs and system-on-chip designs. As a result, the design cost and time can be significantly reduced. The main features and benefits of the BQ25122YFTP are: -High-efficiency synchronous buck converter: chargers up to 1.5A with an accuracy of +/- 1.5%. -Integrated pass-through buck and boost converter: This enables tailored charging voltages for use with various battery chemistries.–Flexible power path management: For safe and reliable charging and discharging, the BQ25122YFTP provides a wide operating voltage range from 4.2V to 5.5V. –High level of protection features: Includes reverse current protection, overvoltage protection, overcurrent protection and thermal protection.

Applications

The BQ25122YFTP is suitable for a range of applications, such as consumer electronics and portable power tools. Its 5mm x 5mm TDFN38 package is ideal for space-constrained applications, while still providing a robust and reliable power solution. The BQ25122YFTP is also popular with wearable devices, due to its support for USB power input. This feature offers a convenient way to recharge batteries whenever possible, simplifying the entire charging process.

Working Principle

The BQ25122YFTP works based on the principle of a synchronous buck converter. In a buck converter, the input voltage is stepped down by a fixed ratio and then converted to a regulated output voltage. The buck converter utilises a pair of transistors - a low-side and a high-side transistor. The low-side transistor can be considered the driver for the circuit, while the high-side transistor controls the power output. When the power switch is on, the input voltage is applied to the buck converter, causing current to start flowing through the low-side transistor. As the current flows through the low-side transistor, it causes a voltage drop across its collector-emitter junction. This voltage drop is used to pull the gate of the high-side transistor high, which then turns on and allows current to pass through it. When the power switch is turned off, the current flow is interrupted, and the high-side transistor is turned off. This stops the current flow and ensures that the output voltage remains at the desired value.

Conclusion

The BQ25122YFTP is a highly integrated, single-cell system that offers a fully featured solution specifically designed for portable consumer-type products. It features a high-efficiency synchronous buck converter, as well as an integrated pass-through buck and boost converter, enabling tailored charging voltages for use with various battery chemistries. The BQ25122YFTP is suitable for a range of applications, such as consumer electronics and portable power tools, due to its small size and robust design.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description