Transcription of POWER SUPPLY DESIGN BASICS - STMicroelectronics
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POWER SUPPLY DESIGN BASICS - STMicroelectronics
APPLICATION NOTEAN253/1088 POWER SUPPLY DESIGN BASICSby P. ANTONIAZZIIn mains-supplied electronic systems the AC inputvoltage must be converted into a DC voltage with theright value and degree of 1 and 2 show the simplest rectifier these basic configurations the peak voltageacross the load is equal to the peak value of the ACvoltage supplied by the transformer s secondarywinding. For most applications the output ripple pro-duced by these circuits is too high. However, forsome applications - driving small motors or lamps,for example - they are a filter capacitor is added after the rectifier diodesthe output voltage waveform is improved consider-ably.
load current and inversely proportional to the filter capacitor value. Aimed at system designers whose interest focusses on other fields, this note reviews the basic power supply design knowhow assumed in the rest of the book. 1/6. Figure 5 :Output Waveforms from the Half-wave Rectifier Filter. Figure 8 :DC to Peak Ratio for Half Wave rectifi-
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