SPC58x SMPS, design for EMC reduction Application note
■ All SPC58xx devices can use either a 3.3 or 5 V operating supply, which is fed to all the high voltage pins (the ones named VDD_HV_*). A number of different voltage regulators can provide the 1.2 V power supply (VDD_LV) used by the digital portion of the device. This application note will analyse the use of switched-mode regulators available in the SPC58EHx and SPC58NHx families, and provide general recommendations for the component design.
■ SMPS is by far the bigger contributor to the electromagnetic emissions of a system, so most of the optimization aims to lower at lowering the emissions at the expense of conversion efficiency. Some constraints to drive the choice of the components value will be presented, but the process of fine-tuning the electromagnetic compatibility (EMC) is largely an empiric one. The best approach is to leave on the printed circuit board some open spots where different components can be soldered, and then measure their impact on system performance.
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SPC58x 、 SPC58xx 、 spc58ehx 、 spc58nhx 、 SPC58x family |
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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11-Feb-2021 |
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Rev 1 |
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AN5516 |
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523 KB |
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