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Old 16th April 2018, 04:45 AM   #151
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
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Location: Göteborg, Sweden
Group buy: SSR03 Super Regulator Power Supply Board
I advice you strongly to read the documentation also so you understand how the regulator works. Take also a close look at the schematics.

Pin 3 is the reference voltage, should be 8.5 V
Pin 2 is the feedback which should be the same as pin 3

Pin 6 is the output and it's important that the voltage is well within the supply voltage of the opamp. In your case it's 17 volts so 3-14 V is OK.

Pin 4 and 7 are supply pins which are swapped on the negative regulators.
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Last edited by peranders; 16th April 2018 at 04:54 AM.
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Old 16th April 2018, 05:46 AM   #152
fred sonnen is offline fred sonnen  Germany
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Thanks for the explanation. But I did not find this information on the SSR03 page.
If I could read and understand the schematic, I certainly wouldn't ask all the (maybe stupid) questions. ;-)
Maybe you can say that an SSR03 is not a beginner project. But one can certainly say that I approached the project with a little naivety.

Thanks for your support!!
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Old 16th April 2018, 02:24 PM   #153
fred sonnen is offline fred sonnen  Germany
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Quote:
Originally Posted by peranders View Post
We start with the 17 V version with no load. Have you put tin drops on J1-J4?
Output voltage?
Voltages on pin 2, 3, 4, 6 and 7 on the opamps?
Quote:
Originally Posted by peranders View Post
Pin 3 is the reference voltage, should be 8.5 V
Pin 2 is the feedback which should be the same as pin 3
Pin 6 is the output and it's important that the voltage is well within the supply voltage of the opamp. In your case it's 17 volts so 3-14 V is OK.
Pin 4 and 7 are supply pins which are swapped on the negative regulators.
both LED are on ;-)
tin drops on J1-J4: YES
X3: no load resistor parallel installed
+ -> gnd: 17,32V DC
- -> gnd: 17,21V DC

opamp N2: results in DC
counting order: dot is 1, then going down the side =4; other side 5, going up=8
the second measuring tip is at X3-gnd;
pin 2: 8,51V
pin 3: 8,51V
pin 4: 16,93V
pin 6: 0
pin 7: 10,38 V

opamp N1:
pin 2: 8,55V
pin 3: 8,55V
pin 4: 0
pin 6: 17,2V
pin 7: 10,51 V

Last edited by fred sonnen; 16th April 2018 at 02:31 PM.
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Old 16th April 2018, 04:05 PM   #154
fred sonnen is offline fred sonnen  Germany
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sorry pin 5 - 8 are wrong...

opamp N2: results in DC
counting order: dot is 1, then going down the side =4; other side 5, going up=8
the second measuring tip is at X3-gnd;
pin 2: 8,51V
pin 3: 8,51V
pin 4: 16,93V
pin 6: 10,38 V
pin 7: 0

opamp N1:
pin 2: 8,55V
pin 3: 8,55V
pin 4: 0
pin 6: 10,51 V
pin 7: 17,2V
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Old 16th April 2018, 04:17 PM   #155
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
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Group buy: SSR03 Super Regulator Power Supply Board
Congratulations! It seems to work. Try to load the output within the current limitation, approx 300 mA.
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Old 17th April 2018, 04:55 AM   #156
fred sonnen is offline fred sonnen  Germany
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I did not generally fail ;-)

at the end of the day I need 400mA@17V
I connect a 47ohm, 10W load resitor between X3 + -> gnd and - -> gnd
here are the DC results:
+ -14,7 V at X3 measured parallel to the resistors
opamp N2
pin 2: 7,6V
pin 3: 8,2V
pin 4: 14,4V
pin 6: 13,3 V

opamp N1:
pin 2: 7,6V
pin 3: 8,2V
pin 6: 13,22V
pin 7: 14,27V
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Old 17th April 2018, 06:06 AM   #157
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
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Join Date: Apr 2002
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Group buy: SSR03 Super Regulator Power Supply Board
The R47 and R48 set the current limit so you have to adjust the value. Are you sure that this is the real consumption of your load?
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Old 17th April 2018, 02:05 PM   #158
fred sonnen is offline fred sonnen  Germany
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I get the info 400 mA@17V

Last edited by fred sonnen; 17th April 2018 at 02:12 PM.
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Old 17th April 2018, 02:42 PM   #159
fred sonnen is offline fred sonnen  Germany
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May I give you the measurements for the second 17V-SSG03:
both LED are on ;-)
tin drops on J1-J4: YES
X3: no load resistor parallel installed
+ -> gnd: 17,31V DC
- -> gnd: 7,94V DC (seven)

opamp N2: results in DC
counting order: dot is 1, then going down the side =4; other side 5, going up=8
the second measuring tip is at X3-gnd;
pin 2: 3,49V
pin 3: 2,90V
pin 4: 7,63V
pin 6: 1,07V
pin 7: 0V

opamp N1:
pin 2: 8,55V
pin 3: 8,55V
pin 4: 0
pin 6: 10,53V
pin 7: 17,02 V
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Old 17th April 2018, 03:54 PM   #160
peranders is offline peranders  Sweden
Electrons are yellow and more is better!
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The positive half works since you have the voltage on pin 2 and 3.

The negative half have some problems. You use a LM341 I'll suppose? Is it mounted with the fat outline? Check the resistor values around it. R38, R40, R44, R46.

Is the zener DZ2 oriented in the right direction?
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