QSB20048S3V3

DC DC Converters

DC-DC converters are electronic circuits that convert one direct current (DC) voltage level to another, usually either higher or lower. The efficiency of a DC-DC converter is often determined by the voltage and load of the system. In the case of the QSB20048S3V3, the voltage range is between 18V and 72V.

Application Field

The QSB20048S3V3 was primarily designed as a cost effective solution for DC-DC converters used in telecommunication applications. The output voltage is adjustable between 2.5V and 5.8V , making it compatible for a variety of systems. The power efficiency is up to 93%, providing reliable power conversion at higher power levels.The QSB20048S3V3 can also be used in medical systems requiring high efficiency and high power levels. The adjustable output voltage makes it suitable for different systems and the high efficiency ensures reliable and stable power conversion. It can also be used in industrial, automotive, and avionics applications.

Working Principle

The QSB20048S3V3 is a buck converter, meaning it reduces the voltage of the input source. This is done by controlling the switches in the circuit which ultimately sets the output voltage. The switches are turned on and off at a particular frequency, referred to as the switching frequency, controlled by an oscillator.The amount of voltage reduction is based on an ideal duty cycle, which is the ratio of the "on" time to the total switching period. The duty cycle can be adjusted to suit the output requirements of the specific system. For the QSB20048S3V3 the duty cycle ranges between 0.2 and 0.8.

The QSB20048S3V3 also features over-voltage and over-current protection, as well as soft-start. This ensures stability and longer lifespans of the product by shielding the system from unexpected surges that would damage the output voltage.