SWITCH MODE TRANSFORMERS

Switch mode transformers (also known as switch mode power supply transformers and SMPS transformers) are using in a regulated power supply and function to step up or step down voltage or current, and/or provide isolation between the input and output side of a switch mode power supply. On the primary side of a switch mode transformer, the duty cycle (on time) of the input voltage waveform is varied (switched) to deliver a constant output voltage over varying load conditions. Switch mode transformers (SMPS transformers) are designed to operate at frequencies of 10 kHz to 1 MHz. Switch mode transformer (switch mode power supply transformer) power levels now extend into the 50 kilowatt range. West Coast Magnetics datasheets detail power levels for many different types of Switch Mode Transformers.

DESIGN OF SWITCH MODE TRANSFORMERS

The first step to designing a switch mode power supply transformer is to choose a core and bobbin. Once a core and bobbin are chosen, the number of turns will for each winding will need to be specified. This is done based on the chosen gauss level and the input/output transfer function for the chosen switch mode power supply topology.   For design help WCM has a useful application note for switch mode power transformer design.

CUSTOM SWITCH MODE POWER SUPPLY TRANSFORMERS

Every switch mode transformer is unique. West Coast Magnetics can help you with the design of your switch mode transformer. A well designed switch mode power supply transformer (SMPS transformer) will provide the lowest lifetime cost. Learn more about our custom SMPS transformers.