RT8298EZQW

Voltage - Input (Max):	24V
Supplier Device Package:	14-WDFN (4x3)
Package / Case:	14-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	600kHz
Current - Output:	6A
Voltage - Output (Max):	15V
Voltage - Output (Min/Fixed):	0.8V
Series:	--
Voltage - Input (Min):	4V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The RT8298EZQW is a low input voltage, high current switching DC/DC regulator specifically designed for off-line applications. It is an omnipolar PFC pre-regulator, which can extend the input voltage to the entire system. That\'s why this product has wide application fields. In this article, we will discuss the application field and working principle of RT8298EZQW.

Application Field of RT8298EZQW

RT8298EZQW is a common integrated circuit that is widely used in AC to DC off-line power converter and PFC (Power Factor Correction) pre-regulator. This product is designed specifically to provide power to many devices like home appliances, mobile phones, printers, and other consumer electronics.The RT8298EZQW is suitable for applications such as constant and dynamical load switching PFC pre-regulators; isolated and non-isolated DC to DC converters; step-up, step-down, and inverting DC to DC converters; non-independent three-terminal linear regulators and overvoltage protection.

Working Principle of RT8298EZQW

The RT8298EZQW is a highly reliable PWM control-based monolithic integrated circuit. It employs an all-pole PFC pre-regulator, an adjustable-frequency oscillator, and an output current system.Firstly, the output voltage can be regulated by the linear PFC pre-regulator, which is the core part of this product. The PFC pre-regulator can detect and compare the output voltage to the feedback voltage. The pre-regulator then provides a control signal to the power MOSFET to enable or disable the circuit and regulate the output voltage.Furthermore, the RT8298EZQW has an adjustable frequency oscillator system, which has a low frequency of 250kHz, 400kHz, and 600kHz, respectively. It monitors the oscillation waveform, which ensures that the output voltage is not greater than the upper limit.Finally, the RT8298EZQW also has a current limit system, which monitors the output current to protect the output from excessive current. The current limit system is also adjustable by adjusting an external resistor.

Conclusion

In summary, RT8298EZQW is a useful integrated circuit for a wide range of applications. It has an all-pole PFC pre-regulator, an adjustable-frequency oscillator, and an output current system. This product is suitable for constant and dynamical load switching PFC pre-regulators, isolated and non-isolated DC to DC converters, and many other applications. In addition, the RT8298EZQW can also monitor the output voltage to ensure it is not greater than the upper limit and protect the output from excessive current.

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