How to choose the right DCDC converter

Power management is one of the significant challenges when it comes to electronic designs. But the west way is to manage the problems of thermal management and efficiency. That will allow you to consider items with low energy consumption. When looking for an efficient dc/dc conversion, you must consider some characteristics.

But a few things must be brought to the fore even before going further. When dc/dc converters are being designed, a few specifications must be approved as per the application field. Some of these applications are the output voltage values, efficiency, input voltage values, the input/output electrical insulation, and electrical standards.

The relative components in dc/dc converters are determined by several factors. You must consider the choice of the desired switching technique underlying the dc/dc converters. Think also of the technology used, the dimensions, the materials, dimensions, and more, especially the regulations, which are a determinant of the final cost.

DC/DC converter evaluations

System losses play a significant role when evaluating DC/DC converters. There are two types involved here; losses due to charge and discharge phases and the ones due to the inductor’s peak current. The loss due to drain-source resistance ON-OFF switching and the inductor’s DC resistance;┬á The capacitive effects of the circuit lead to switching losses and dynamics. Thus you must consider the diode and FET drain-source parasitic switching capacities.

Digital control

The most reliable method for voltage adjustment has proven to be digital control-thanks to technology. The ICs allow for fine-tuning the energy savings in every operating cycle. The analog to digital converter transforms the output voltage and reference voltage in a digital value. The compensating network of the analog device is replaced by the PID processor. The digital design is flexible and can allow easy conversion of power supply from a single phase to a multi-phase power supply.

Medical DC/DC Converters

A class of converters known as the medical-DC/DC converters is becoming popular. Search for galvanic separation between the input/output is expressed as an isolation voltage and the isolated converter’s ability to withstand high voltages depends on the materials used to build the converter. Simple transformer construction entails the use of windings with a coating thickness, and this ensures adequate insulation. However, this solution is reaching its limits.

The operating temperature range is the other critical specification of HV DC-DC convertersafter insulation resistance.

If the converter is efficient, it can operate even in high temperatures, even with low power dissipation, without overheating.

Railway DC/DC Converters

Railway applications should withstand mechanical, electrical, and climatic environments encountered on rolling stock and traction vehicles. Electronic equipment must operate reliably and requires the conversion of DC/DC power supply.

There’s a need for compact modules that offer a wide input voltage range for single and dual voltages. A high yield percentage and a wide working temperature range of a DC/DC converter provide a wide range of uses.

There are a series of compromises in design factors like cost, size, and efficiency. You need to identify some performance like ripple voltage, transient tolerance, and load characteristics before you design the power supply stage. Most designers are now concentrating on developing systems with more significant run time and reduced dimensions.


Sudarsan Chakraborty is a professional writer. He contributes to many high-quality blogs. He loves to write on various topics.