Dual power supply

[MAXPAYNE]

Has sombody build the power supply on figure 2 (vsn 2) is it working properly ?

http://sound.westhost.com/project44.htm

[Trishool]

Has sombody build the power supply on figure 2 (vsn 2) is it working properly ?

http://sound.westhost.com/project44.htm

The schematic looks convencing for a lab powersupply but not for anyhing beyond that , what application you require powersupply for?.

Ts

[smartcat004]

I have confidence the circuit should work, you can't go wrong with these conventional regulators
except do remember to use a minimal heat sink if you are running  > 300 mA..

And anything above 1A means you need to make sure the heat sink is really a solid one with fins and the regulator body is thermally connected to heat sink(use the heat transfer paste materials...).

[MAXPAYNE]

The schematic looks convencing for a lab powersupply but not for anyhing beyond that , what application you require powersupply for?.

Ts

I will use as lab supply

[Trishool]

I will use as lab supply

Figure 2 , has better trimming and Adjustments , but temperature compensation isnt there . If you need that fine supply I can post here schematic how to temperature compensate it and rest of the issue I hope you can integrate on your own .
BTW: what Load/Line regulation you need?

Ts

[MAXPAYNE]

Figure 2 , has better trimming and Adjustments , but temperature compensation isnt there . If you need that fine supply I can post here schematic how to temperature compensate it and rest of the issue I hope you can integrate on your own .
BTW: what Load/Line regulation you need?

Ts

Thanks for uor reply. please post the schematic. line regulation may be 1%-4%

[Trishool]

Thanks for uor reply. please post the schematic. line regulation may be 1%-4%

Ahhh for that you dont need Temperature compensation . Your schematic is cool what is the confusion explain openly , such that we may find some remedy for it.


Ts

[MAXPAYNE]

Posted on: February 05, 2008, 07:14:54 07:14 - Automerged
Please suggest how can i chose R1, R2, R3 and R4 if i wanna 1A through each regulator and 3A through bypass transistor  for both positive and negative side.

[Trishool]

Posted on: February 05, 2008, 07:14:54 07:14 - Automerged
Please suggest how can i chose R1, R2, R3 and R4 if i wanna 1A through each regulator and 3A through bypass transistor  for both positive and negative side.

MAXPAYNE , There is no bypass transistor in the schematic you show. The transistors Q1 , Q2 are meant for fine regulation on the adjust pin , its a feed back loop topology.

Ts

Posted on: February 05, 2008, 07:36:17 07:36 - Automerged
MAXPAYNE , BTW 3A at max 24V is 72 Watts ? . Very big heatsinks , instead go for SMPS or I have a link below :
http://www.instructables.com/id/Converting-a-computer-ATX-power-supply-to-a-really/

[MAXPAYNE]

do u hae any adjustable swiching dc supply ? (0-30V)