84CNQ060S2

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• Application Field of 84CNQ060S2

The 84CNQ060S2 is a high voltage and high current rectifier with advanced chip geometry design. It has high efficiency and low electromagnetic interference (EMI). This rectifier has been extensively applied in electronic converters, telecom power systems and other power electronic systems. Specifically, its application field includes:

• High voltage direct current (HVDC) power transmission.
• High-speed AC-DC conversion, such as high-speed CPUs, telecom rectifiers and contactless power switches.
• High-frequency AC-DC conversion circuits, such as PFC or LLC converters.
• Offline switching power supply and AC motor drive power supply modules.
• Uninterruptible power supply (UPS) systems.
• Power distribution systems.
• Telecom rectifiers.
• Power factor correction (PFC) systems.

The 84CNQ060S2 is a high frequency rectifier, which makes it more suitable for operation in these power electronic systems than the traditional single-phase or three-phase rectifier. With the reduction of losses due to higher frequency operation, this rectifier can deliver greater power output at a much smaller size than traditional rectifier.

• Working Principle of 84CNQ060S2

The 84CNQ060S2 is a 6-phase rectifier with two-stage synchronous rectification. In the first stage, there are two legs of SCRs, which turn on and off alternately for each half cycle under the control of the external gate signal. During the second stage, the main rectifier and synchronous rectifier squeeze-screen diodes are driven by the controller’s internal gate signal, enabling the diode to perform switching functions at a very fast speed. This allows the 84CNQ060S2 to achieve low conduction and switching losses, and also helps to reduce the reactive power and harmonic current to ensure that it operates relatively quietly when compared to other rectifiers.

The 84CNQ060S2 also uses a dual-loop control system. This system consists of an inner loop, responsible for accurately regulating the power output from the secondary side, and an outer loop, responsible for controlling the current feedback at the primary side. This dual-loop control system can effectively reduce the time for current feedback at the primary side and provide a stable, accurate and consistent power conversion and output.

The 84CNQ060S2 uses a resonant snubber line circuit to reduce the high dV/dT of the switching, improve EMI performance and minimise the current ringing in the conduction state. The snubber also helps to reduce the switching stress on the devices when they are subjected to high dV/dT voltages.

To ensure reliable operation and minimise operation temperature, the 84CNQ060S2 uses soft-switching technology. This helps to reduce the switching losses and the switching series timing, while improving the efficiency of the rectifier. It also helps to reduce the audible noise generated by the device when it is in operation.

The 84CNQ060S2 also incorporates power management functions. These functions can keep track of the current and voltage levels, and ensure that the device is always operating at its maximum performance.

Overall, the 84CNQ060S2 is a high voltage and high current rectifier with advanced chip geometry design. The device has been extensively applied in many power electronic systems such as UPS systems, high-speed AC-DC conversion circuits and power distribution systems. With its high efficiency and low electromagnetic interference, it can deliver greater power output and superior performance compared to traditional rectifiers.

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