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DC-DC conversion. Implies conversion of a DC voltage level up or down. DC-DC converter can be isolated or non-isolated. Electronically it can be done by many kinds of circuits, depending upon the application (charge pumps, voltage multipliers, linear voltage regulators, boost/buck switched converters, etc)

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Boost converters also transform to have lower input load impedance than buck converter input , Zin(f) so it is improved with lower Xc(f) with low ESR and bigger C. This serves to improve output regu …
answered Mar 4 '18 by Sunnyskyguy EE75
3
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A complete analysis of resonance is hard without datasheets and a model for each part. But the primary fault is system design with lack attention to thermal losses and cooling. It requires a fan and h …
answered Jun 15 '18 by Sunnyskyguy EE75
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With a 2:1 V input range above and below the output of 12V, this is called an isolated "Buck-Boost or Flyback converter" More research material here and there The flyback converter is based on t …
answered Apr 3 by Sunnyskyguy EE75
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The output voltage ratio is divided to match the internal reference and the gain of this error difference controls the average current thru the inductor to minimize this DC error. This can be done e …
answered Feb 20 by Sunnyskyguy EE75
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This defines the OVP headroom for V regulation at Vfb=1 DMAX=90% so there is still 10% MIN margin for linear regulation. If Vfb exceeds 20% it shuts off the clock indicating some excessive kickback be …
answered Aug 29 '17 by Sunnyskyguy EE75
2
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I agree with comments above. It would be harder to interface 12V to an AC powered large monitor than to use a DC>AC inverter. From my surveying various AC TV monitor PSU schematics, they 1st rectify …
answered Dec 29 '17 by Sunnyskyguy EE75
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RT means resistor timer for an Astable Clock with external R or external logic clock for synchronous operation, possibly used for N phase shifted parallel converters or EMI or inductor property purpos …
answered Aug 25 '16 by Sunnyskyguy EE75
2
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Since you didn't indicate much details in your analysis of your problem, I might be inclined to suggest ESD damage on the input. Something has attenuated the feedback that so that it overdriving the …
answered Dec 5 '18 by Sunnyskyguy EE75
3
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You can even analyze the log response on Audio with very high sampling rates using free Audacity and a Turtle Beach Audio card or maybe a good USB module. There are technical reasons with higher orde …
answered Sep 24 '18 by Sunnyskyguy EE75
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1st one must follow the datasheet Test methods for proper noise measurement. C1,C2 supplement the ripple rejection to meet specs under the conditions given. C3 and R1 present a 500 Ohm load impedanc …
answered Apr 13 by Sunnyskyguy EE75
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read waveform Vp in both AC and DC coupled mode and take the difference.
answered Sep 28 '16 by Sunnyskyguy EE75
0
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Judging by the footprint of the 3 L's your DCR is too high.[mΩ] Just like in real estate the 3 L's are critical for L5,6,7 DCR specs.;) Rules of Thumb L/R >> 1/fs switching rate and DCR <<= RdsOn …
answered Jan 22 by Sunnyskyguy EE75
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IF it worked before then your loop area is too big in your layout. Keep all wires short as possible in the loop. Consolidate all your Grounds, Vin ,L ,Co, Zener, Rsc, wires to pin 1,2,7,8, and caps c …
answered May 25 '12 by Sunnyskyguy EE75
2
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http://www.blueskyenergyinc.com/uploads/pdf/BSE_What_is_MPPT.pdf Vload/Voc open cct. needs to be 75 ~82% depending on solar power. You are using 5V/18V=27.7% so your output current cannot be increa …
answered Aug 8 '17 by Sunnyskyguy EE75
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I referred to this book Switching Power Supply Design 3ed. by Pressman, Keith Billings and Morey, because of my experience with K.B. in the mid-80's, who did great work to supply our company with good …
answered Dec 5 '17 by Sunnyskyguy EE75

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