Keantoken's CFP cap multiplier - Page 83

sikahr · 11th April 2015, 01:13 PM

Like this?

jameshillj · 11th April 2015, 01:28 PM

4 diodes, not a GB bridge (soft recovery, schottky, smd, etc) - shorten tracks by Input one end of pcb & o/p the other end - snubber is applied directly across sec winding = 0.01uF in // to a 0.15uF + 1/2 watt resistor to suit (Haggerman type) - add option to use 2 resistors in '+ rail' and 2 resistors in '- rail' for the C-R-C filter - add option for extra resistors for R-C-R-C filters - Single layer, NO ground plane - maybe R + led indicator - optional power load resistor on o/p - etc

sikahr · 11th April 2015, 03:03 PM

Quote:

Originally Posted by jameshillj

1.
4 diodes, not a GB bridge (soft recovery, schottky, smd, etc)

2.
shorten tracks by Input one end of pcb & o/p the other end

3.
snubber is applied directly across sec winding = 0.01uF in // to a 0.15uF + 1/2 watt resistor to suit (Haggerman type)

4. add option to use 2 resistors in '+ rail' and 2 resistors in '- rail' for the C-R-C filter

5.
add option for extra resistors for R-C-R-C filters

6.
Single layer, NO ground plane

7.
maybe R + led indicator

8.
optional power load resistor on o/p -c

1. board is so small, 5x5 cm, no room for disrete diodes, complicates layout, but OK maybe

2. no room for conectors on sides

3. OK

4. dont understand, this board is for one rail not for both (you need two), it has CRC (pi) filter

5. maybe

6. no ground plane OK, but needs 2 layer

7. I'll try to find room

8. bleeder, OK

TNT · 11th April 2015, 03:24 PM

So same traces on both sides? For less resistance? This makes it very hard to de-solder and remove components without braking one side traces?

//

sikahr · 11th April 2015, 03:31 PM

Quote:

Originally Posted by TNT

So same traces on both sides? For less resistance? This makes it very hard to de-solder and remove components without braking one side traces?

//

No, last version is without that.

TNT · 11th April 2015, 03:38 PM

OK! Well, I'm devoted to SMPS (+ C mult) so I will pass this one. Still, a welcome contribution I'm sure.

//

jameshillj · 11th April 2015, 03:39 PM

Best to keep line carried noise, charging current pulses, etc concentrated in area of raw supply and as the cct on post #790 requires +/- rail volts with the single 0 volt connection, use single pcb for both rails, despite the larger size and feed maybe 2 CMx (for 2 channel signals) - look outside the square a bit

Single layer only maybe - simplify tracking and avoid capacitor 2 layer thru hole soldering - maybe larger smd power resistors underneath - is central 0 volt point connection at input, output of CMx board(s) or another point in the circuit (following regulator, active circuit, etc)?

Some suggestions only ...

sikahr · 11th April 2015, 03:47 PM

* added faston terminals
* added input snubber, cap two footprint, 1206 smd + 0.2" through hole
* added output resistor (bleeder)

sikahr · 11th April 2015, 07:27 PM

sikahr · 11th April 2015, 07:30 PM

One more

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11th April 2015, 01:28 PM	#822
jameshillj diyAudio Member Join Date: Feb 2005 Location: Melbourne	4 diodes, not a GB bridge (soft recovery, schottky, smd, etc) - shorten tracks by Input one end of pcb & o/p the other end - snubber is applied directly across sec winding = 0.01uF in // to a 0.15uF + 1/2 watt resistor to suit (Haggerman type) - add option to use 2 resistors in '+ rail' and 2 resistors in '- rail' for the C-R-C filter - add option for extra resistors for R-C-R-C filters - Single layer, NO ground plane - maybe R + led indicator - optional power load resistor on o/p - etc

11th April 2015, 03:24 PM	#824
TNT diyAudio Member Join Date: Apr 2003 Location: Sweden	So same traces on both sides? For less resistance? This makes it very hard to de-solder and remove components without braking one side traces? //

11th April 2015, 03:38 PM	#826
TNT diyAudio Member Join Date: Apr 2003 Location: Sweden	OK! Well, I'm devoted to SMPS (+ C mult) so I will pass this one. Still, a welcome contribution I'm sure. //

11th April 2015, 03:39 PM	#827
jameshillj diyAudio Member Join Date: Feb 2005 Location: Melbourne	Best to keep line carried noise, charging current pulses, etc concentrated in area of raw supply and as the cct on post #790 requires +/- rail volts with the single 0 volt connection, use single pcb for both rails, despite the larger size and feed maybe 2 CMx (for 2 channel signals) - look outside the square a bit Single layer only maybe - simplify tracking and avoid capacitor 2 layer thru hole soldering - maybe larger smd power resistors underneath - is central 0 volt point connection at input, output of CMx board(s) or another point in the circuit (following regulator, active circuit, etc)? Some suggestions only ...