
MHz switching frequency-based devices enable miniaturization of the DC-DC converter and EMI filters
Achieving EMI conducted emission compliance for automobiles with a single stage filter. By Nicola Rosano, Sr. Strategic FA/System Engineer at Vicor
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A full brick package developed by TDK-Lambda, the PF1500B-360, is for high voltage distributed power architectures
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The ICs block current flow through the X-capacitor discharge resistors when the AC voltage is connected and automatically discharge X capacitors through the resistors when the AC is disconnected. They simplify EMI filter design, says the company, and allow the use of larger X-capacitors to enable smaller inductive components to be used without change in power consumption.
The ICs can be placed before or after a system’s input fuse. Devices deliver high common-mode surge immunity so that no external ground connection is necessary. The use of 1,000V MOSFETs ensures a high differential surge withstand. Creepage on the package and PCB is maintained at 4.0mm and above.
Designers can specify the ICs in projects that require X-capacitor values from 100 to 6 micro Farad.
The ICs are certified to CB and Nemko safety requirements; developers do not need to perform a separate safety test on the X-capacitor discharge circuit of the power supply.
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