78SR174SC

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DC-DC converters are important components in today’s renewable energy systems. They are mainly used for converting the direct current (DC) input to the required output voltage. The 78SR174SC converter is an example of such converters. This article will discuss the 78SR174SC converter application field and working principle.

The 78SR174SC converter has been designed for applications requiring a power range of 7-30 W. It is a high performance DC-DC converter which features an adaptive switch frequency, high efficiency, low ripple and accords with safety parameters according to UL and CUL standards. It is suitable for popular suppliers of LED lighting, automotive, communication and medical equipment.

The 78SR174SC converter is a step-down DC-DC converter which reduces both voltage and current levels of the input voltage without changing AC-DC rectifier. It features an innovative internal design, including an integrated MOSFET driver, controller, rectifier, RF filter, and NTC resistor. It operates in a fixed frequency PWM mode and supports adjustable voltage from 4.5V to 7.5V. It also supports an adaptive switch frequency which helps in reducing EMI radiation, as well as a quiescent current of 2.2mA. In addition, it features internal thermal protection for over temperature protection.

The 78SR174SC converter has a wide range of features which make it suitable for a variety of applications. For instance, it features an integrated MOSFET driver, robust thermal design, over-current protection, low ripple and low standby current. Furthermore, its adaptive switch frequency ensures quiet operation which makes it ideal for noise-sensitive applications. In addition, its integrated NTC helps in reliably detecting an over-temperature condition and thus, improving the stability and safety of the system.

The working principle of 78SR174SC converter is as follows. The input voltage is rectified by an internal rectifier and converted to DC power. The DC power is filtered and regulated by the integrated circuit (IC) controller and the integrated RF filter. The controller provides an analog signal to the MOSFET driver which is used to generate a PWM wave and switches the internal MOSFETs. The output voltage is regulated through a feedback loop, which is compared with a reference voltage. The MOSFETs are used to step down the voltage and current level of the input voltage to achieve the desired output voltage.

In conclusion, the 78SR174SC converter is a high performance DC-DC converter which is suitable for a variety of applications. It is designed with an adaptive switch frequency, low ripple, high efficiency, low quiescent current and reliable thermal protection. Its working principle is based on an internal rectifier, MOSFETs, controller, RF filter and NTC for effective and safe operation. Thus, it is an ideal choice for LED lighting, automotive, communication and medical equipment.

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