SJPA-D3VR Discrete Semiconductor Products

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SJPA-D3VR is a single-phase power factor correction (PFC) controller with a switch-mode power converter. Its main application field is the boosting of rectified current from an AC line source. It is also used in sound power amplifiers, overloaded applications, and ground-referenced installations requiring AC power.

The working principle of the SJPA-D3VR is based on the principles of PFC. It regulates the current draw on the AC line, keeping it in phase with the voltage. By controlling the phase angle at zero degrees, harmonic distortion is minimized, improving efficiency and reducing physical unit size. This is achieved by sensing the input voltage and current, and then comparing them with a reference voltage and current. If the currents are not in phase, the output duty cycle is regulated to compensate. The duty cycle is calculated by measuring the peak-to-peak current of the line, and then dividing this number by two. This duty cycle is then compared to the reference duty cycle and the difference is used to determine the controller switch control duty cycle.

The SJPA-D3VR also includes a protection circuit that provides over-voltage or over-current protection. This protection circuit monitors the input and output voltages, as well as the output current. When the voltages or currents reach the predetermined limit the protection circuit will shut down and prevent any further damage to the controller. Another notable feature of the SJPA-D3VR is its operation temperature range, which is from -40°C to +85°C, making it suitable for use in extreme temperatures.

In conclusion, the SJPA-D3VR single-phase power factor correction (PFC) controller is a reliable and efficient device that is suitable for a wide range of applications. It features a switch-mode power converter, a protection circuit and an extended operating temperature range. It is a cost-effective solution for improving power factor and emission control, protecting equipment and reducing physical unit size.

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