Hi, I am going to build +-15/ +5 v power supply and post my schematic here for review.
The +5v is for arduino MCU controler
It is basically CRC filter and a voltage regulator.
Any suggestions/ comments about topology and parts value is appreciated.
F.ex.
- The electrolyte cap values in CRC - way too big before voltage regulator?
- The extra caps C111/112, C21/22
- Using one big polygon for DGND and AGND, instead of option for ground potential lift? I am schizophrenically afraid of ground loops...
The +5v is for arduino MCU controler
It is basically CRC filter and a voltage regulator.
Any suggestions/ comments about topology and parts value is appreciated.
F.ex.
- The electrolyte cap values in CRC - way too big before voltage regulator?
- The extra caps C111/112, C21/22
- Using one big polygon for DGND and AGND, instead of option for ground potential lift? I am schizophrenically afraid of ground loops...
I prefer to use RC-snubbers on secondary windings but not caps as C111, C112.
You can use poly-switch fuses instead of FU11, FU12.
There is no need in so large C15, C16 (and there is no need in C113, C114, C115 and C116 at all).
Increase C17, C18 a bit.
You can use poly-switch fuses instead of FU11, FU12.
There is no need in so large C15, C16 (and there is no need in C113, C114, C115 and C116 at all).
Increase C17, C18 a bit.
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It is the same size 🙁
I dont clearly see R11, R12 - is it 51 R? It is too big. 5R1 or 10 R (max) is ok for 200 mA.
There is no need to calculate RC-snubber carefully, you may use 10-15 Ohm resistor and 0.47 uF cap (across secondary winding). It is near optimum for this one (and it will be ok for most low-voltage power supply circuits).
I dont clearly see R11, R12 - is it 51 R? It is too big. 5R1 or 10 R (max) is ok for 200 mA.
There is no need to calculate RC-snubber carefully, you may use 10-15 Ohm resistor and 0.47 uF cap (across secondary winding). It is near optimum for this one (and it will be ok for most low-voltage power supply circuits).
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You may use a bit lower capacity in +-15V CRC-filter (2200..3300 uF), and a bit larger caps in +5V CRC filter (up to several times larger, up to 4700 uF, because of lower voltage and higher current, and so - lower load impedance).
+5V circuit CRC-filter has to have R about 0.47 Ohm otherwise it will be too hot with 1 Ampere.
I think +5V CRC has to have at least 2200 uF (for 1 Amp current) but I would use 4700 uF caps for that.
+5V circuit CRC-filter has to have R about 0.47 Ohm otherwise it will be too hot with 1 Ampere.
I think +5V CRC has to have at least 2200 uF (for 1 Amp current) but I would use 4700 uF caps for that.
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@ emosms - take a look at this thread - VRDN: bipolar regulator PCB for line level ckts: ±11V to ±20V @ 1.5A with "De-Noiser"
Very good quality linear supply with the de-noizator circuit added on. Ideal for Preamps and RIAA head amps.
Very good quality linear supply with the de-noizator circuit added on. Ideal for Preamps and RIAA head amps.