New UK power supply topology granted patent
TDK-Lambda UK has announced that its Zero Voltage Switching Converter (ZVSC) UK patent application has been approved for grant by the UK Intellectual Property Office.
Andy Skinner, TDK-Lambda's chief technology officer, believes there is an ongoing push for power supply manufacturers to develop smaller, more feature rich products. "Since the use of an EMC filter can represent a significant percent of the overall volume of the unit, reduction of the common mode noise flowing back into the power source is a key criterion for a more compact design."
The ZVSC topology uses a half bridge switching circuit with additional noise cancelling circuitry to reduce conducted common mode noise. According to TDK-Lambda, since noise is reduced, a much smaller EMC filter is needed for the power supply to comply with EMC regulations, thereby achieving a compact, high power density unity. The company's NV300 uses such a topology, achieving a power density of 8.3W/in3.
