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Juma's Easy-Peasy Capacitance Multiplier
Juma's Easy-Peasy Capacitance Multiplier
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Old 21st May 2020, 05:13 PM   #791
DanSoare is offline DanSoare  Romania
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What do you think of using Schottky barrier rectifiers in Juma's Capacitance Multiplier? I was looking at MBR10100G.
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Old 21st May 2020, 05:37 PM   #792
Mark Johnson is offline Mark Johnson  United States
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Juma's Easy-Peasy Capacitance Multiplier
I use them in a PSU for 2 x LM3886 chipamps and am very happy.
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Old 21st May 2020, 06:42 PM   #793
3kes is offline 3kes  Netherlands
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To be honest, I cannot hear the difference between a schottky diode based bridge and a simple 1N400x rectifier bridge.
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Old 21st May 2020, 10:49 PM   #794
Mark Johnson is offline Mark Johnson  United States
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Juma's Easy-Peasy Capacitance Multiplier
They do however give an extra half a volt of DC at no extra cost. If you're squandering away DC volts through the use of capacitance multipliers etc., it might be a welcome little boost.

Also as discussed in the PSU for Chipamps thread, thermal imaging shows that Schottkys run significantly cooler than standard diodes and WAY cooler than high-Vf soft recovery diodes. Why? Power = volts x amps ; and Schottkys drop significantly less volts. If the electrolytic capacitors are nearby, this reduction in heat dissipation & heat emission, lengthens capacitor life. What's not to like?

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Last edited by Mark Johnson; 21st May 2020 at 10:53 PM.
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Old 22nd May 2020, 06:40 AM   #795
DanSoare is offline DanSoare  Romania
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Yes, this is the reason, I expect 0.5-0.6V more voltage and maybe a ripple improvement.
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Old 13th June 2020, 10:44 AM   #796
ferynov is offline ferynov  Indonesia
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Click the image to open in full size.


voltage drop about 10v is normal for this cap-mx ? i use @olafk layout.
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Old 29th June 2020, 11:12 AM   #797
donovas is offline donovas  South Korea
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id like to try out mark's darlington Cmx circuit shown on this page and am wondering if a crc before the circuit would be benefitial enough or its no longer economical all things considering.
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Old 4th July 2020, 05:53 AM   #798
donovas is offline donovas  South Korea
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Quote:
Originally Posted by donovas View Post
id like to try out mark's darlington Cmx circuit shown on this page and am wondering if a crc before the circuit would be benefitial enough or its no longer economical all things considering.
Anybody? Mark?

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Old 4th July 2020, 05:57 AM   #799
Luke is offline Luke  New Zealand
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Hi Donovas, are CRC in front of the Cmx will lower the ripple entering the Cmx, so it would make the power supply a little more effective. It cant hurt and shouldnt really cost much more than a C PSU.
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Old 6th July 2020, 02:49 PM   #800
donovas is offline donovas  South Korea
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Thank you. I will try that.

Also this psu will be for a class A headphone amp. Should i bother to add an lm317 regulator after it or will it be detrimental in terms of noise?
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