RT6255AHGJ6F

RT6255AHGJ6F Application Field and Working Principle

Realtek RT6255AHGJ6F belongs to the family of PMIC - Voltage Regulators - DC DC Switching Regulators. It is designed to be the standard solution for adapter and power supply design, especially for those high efficiency, lightweight and low temperature rise adapters. With better features than prior solutions, RT6255AHGJ6F enables designers to deliver superior products with cutting-edge performance.

Features

RT6255AHGJ6F integrates a 3-channel high efficiency synchronous rectifier controllers, 6-channel switch controllers and over-temperature protection circuit on a single chip. It brings in many features such as a synchronous rectification method, resistor-programmable operating frequency, constant peak current job, and a power supply range of up to 48V. It also ensures highly efficient, low temperature rise and low EMI at the same time.

Applications

RT6255AHGJ6F can be utilized in AC adapter chargers, power adapter and industrial power supply design for notebook computers, tablet PCs and portable devices. It is also suitable for industrial power, low power supply applications, set-top box, game console, wireless charger and USB chargers.

Working Principle

The working principle of RT6255AHGJ6F is based on the DC-DC Buck or Buck-Boost Boost-Buck converter. It performs the power conversion operation by switching output devices like MOSFETs between on-state and off-state operation. It consists of a power input module, a boost-buck converter and an output circuit. The power input module accepts an AC input voltage and then rectifies and filters it. The output circuit essentially consists of the primary side of the transformer and a synchronous rectifier. During the switching process, the output voltage is regulated by performing a loop back from the output of the load to the input of the power stage to adjust its output voltage. The system includes a feedback loop, which sets the pulse width of the pulse-width modulation (PWM) device, maintaining the output voltage at the desired value.

Conclusion

The Realtek RT6255AHGJ6F is a high efficiency DC-DC switching regulator IC with many features such as a synchronous rectification method, resistor-programmable operating frequency, and constant peak current job. Its wide operating voltage range and synchronous rectification allow designers to make innovative products with better performance and lower power consumption. It is suitable for both consumer and industrial applications including adapters, chargers, power adapter, power supply design and more.