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SMPS and noise
Dear all
I want to design a power supply for a low power portable HF SSB rig with maximum efficiency from a 12V battery I will need +1.8V at around 200mA, +5V at low current, and +/-12V, with the +12V at 1A unregulated. I thought of using a MAX1865 SMPS chip which has multiple outputs with good efficiency. However I am conscious that in a quiet analogue environment, the SMPS may be a problem with switching noise. Is this a feasible idea? Should I use several separate chips? What precautions should be taken? (I have read the Maxim app notes on PCB layout and noise reduction, but I am not sure whether this will be sufficient in this environment) Thanks Richard |
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