PFS723EG

Series:	HiperPFS™
Packaging:	Tube
Part Status:	Active
Mode:	Continuous Conduction (CCM)
Frequency - Switching:	24kHz ~ 95kHz
Voltage - Supply:	10 V ~ 12 V
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	7-SSIP, 6 Leads, Exposed Pad, Formed Leads
Supplier Device Package:	eSIP-7G

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Introduction
A power factor correction (PFC) regulator is a crucial component of any power system. PFCs are used to reduce the power losses caused by AC-DC rectifiers and various other power sources. The PFS723EG is a high performance PFC controller, specialized for Active Clamp ZVS PFC applications. Its compact size, high power handling capacity, wide operating temperature range and ease of programming, makes it a preferred choice for many applications.Application Fields for the PFS723EG
The PFS723EG is primarily aimed at Active Clamp ZVS PFC applications but can also be used for other applications. It is the perfect solution for high voltage PFC systems, ensuring that the power delivered to the load is free from disturbances. PFS723EG is particularly suited for mid- to high-power applications, such as telecom network power systems and home appliances, which require high efficiency, high power density and high power factor correction rate. It is also suitable for hot plug-in systems, where the load remains connected while the input source is removed or replaced.Working Principle of the PFS723EG
The PFS723EG utilizes an Active Clamp ZVS PFC method. This method works by using two switching elements and two reverse-conducting diodes to form a bridge rectifier. The two switches can be activated at different times, enabling the energy stored in the diode and the parasitic elements of the circuit to be used to make the rectifier function more efficiently. The controller goes into standby mode when the load is disconnected, ensuring the controller does not generate any noise until the input voltage is applied again.The PFS723EG uses a quasi-resonant zero-voltage switching (ZVS) technique to reduce the switching loss and improve the power factor. ZVS ensures that the current passing through the PFC inductor has a constant amplitude when the voltage across the switch is equal to zero. This helps reduce the loss of power due to switching period, while also improving the overall efficiency of the system.Moreover, the PFS723EG is equipped with various protection features such as over voltage protection (OVP), over temperature protection (OTP), over current protection (OCP), and input under voltage protection (UVP). These features protect the system from abrupt changes in input voltage and current or from short circuit or thermal runaway conditions.Conclusion
The PFS723EG is a high performance, high efficiency PFC controller, designed for Active Clamp ZVS PFC applications. It is the perfect solution for mid- to high-power applications, where high power density and high power factor are required. Moreover, it features various protection features such as OVP, OTP, OCP, and UVP, ensuring that the system remains safe and efficient.

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