RPD-75A

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AC/DC converters are one of the most common and versatile type of power electronics circuits used to convert alternating current (AC) to direct current (DC). The AC/DC converters can be divided into two categories, depending on the type of AC power that it is converting. These categories are line-commutated and self-commutated converters. The line-commutated converters are designed to convert power from a rectified AC line, while the self-commutated converters are designed to convert power from an unregulated AC source. The self-commutated converters are usually more efficient than the line-commutated converters because they can be operated at higher frequencies, without commutation problems.

The RPD-75A is a self-commutated AC/DC converter used to convert unregulated AC power to regulated DC power. The unit consists of high frequency, self-commutated, single-phase full-bridge converter, a pulse-width-modulated (PWM) control circuit, and an output filter. It is designed to be used in applications that require high-efficiency performance and low electromagnetic interference (EMI). The unit supports input voltages from 85VAC to 265VAC and can deliver up to 75W of continuous power.

The working principle of the RPD-75A is based on the principle of self-commutation. The input AC voltage is rectified and filtered, and then is switched to DC using a PWM control circuit. The filtered DC voltage is then fed to the high frequency full-bridge converter which uses the PWM control signal to modulate the current flowing in the circuit. The modulated current is then passed through the output filter to obtain the desired DC output voltage. The PWM control circuit monitors the output voltage and adjusts the duty cycle accordingly, ensuring that the output voltage is maintained at the desired value.

The RPD-75A is primarily used in consumer electronics, lighting applications and test and measurement equipment, as well as in power supply designs such as charger applications. It is used in applications that require high efficiency, low output ripple, low EMI and good EMC performance. In addition, the RPD-75A can be used to convert AC power in home appliances such as TVs, washing machines and other home appliances.

In conclusion, the RPD-75A is a self-commutated AC/DC converter designed to convert unregulated AC power to regulated DC power with high efficiency and low EMI, making it ideal for consumer electronics, lighting applications and test and measurement equipment. The unit uses a high frequency full-bridge converter and a PWM control circuit to modulate the current flow and regulate the output voltage. It is an efficient, reliable and cost-effective solution for many power supply designs.

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