PT6702N

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DC-DC converters are widely used in a variety of applications, from small consumer electronics to large AC/DC and DC/DC power supplies. Among them, the PT6702N is a converter that combines high efficiency, high reliability and low cost. It is mainly used in DC/DC conversion applications, such as industrial power supplies, LED lighting, automotive systems, etc. In this article, we will discuss the application fields and working principle of the PT6702N.

Application Field of PT6702N

The PT6702N is a high-efficiency, low-cost, high-reliability DC-DC converter designed specifically for DC/DC applications. It provides up to 95% efficiency in a wide input voltage range (6V-60V) and output power range (50W-120W). With a small size package and an integrated external frequency synchronous circuit, the PT6702N is ideal for applications with tight space requirements.

The PT6702N can be used in industrial power supplies, LED lighting, automotive systems, etc. It has a built-in active over-temperature protection circuit to ensure stability and high reliability. It also has excellent switching characteristics, making it suitable for applications with high transient response requirements. The PT6702N also supports running in pulse-by-pulse (PBP) or peak current mode (PCM).

Working Principle of PT6702N

The PT6702N is a buck-boost DC-DC converter. It takes input voltage (Vin) as input power, and converts it to regulated output voltage (Vout) with high efficiency. The power conversion process is composed of four stages: current input stage, power switchover stage, current output stage, and voltage output stage.

In the current input stage, the PT6702N uses an external circuit to rectify and filter the input voltage, then the voltage will be sent to a current sensing circuit prior to the power switchover stage. In this stage, the PT6702N uses a pair of internal power switches to oscillate at a pre-determined frequency, which is determined by the external frequency synchronous circuit. The oscillating signals will be converted to output current (Iout) in the current output stage.

In the output voltage stage, the PT6702N uses an internal feedback circuit to compare the feedback voltage with the output voltage. If the two are not equal, the power switchover stage will be adjusted accordingly, in order to ensure the stability of the output voltage. This will also be repeated until the output voltage meets the requirements.

Conclusion

The PT6702N is a DC-DC converter that provides high efficiency, high reliability, and low cost. With excellent switches and an integrated external frequency synchronous circuit, PT6702N is ideal for applications which require high transient response, such as industrial power supplies, LED lighting, and automotive systems. This article discussed its application field and working principle, and provided a brief overview of how it converts input voltage into regulated output voltage.

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