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GOLD Reference Regulator

July 2, 2012

GOLD Reference Regulator

Preamp power / CD modification / DAC power/CD ROM POWER.....

More quiet and detailed

Ultimate Performance / Hi-End Grade PCB Layout 

2 Oz. copper foil 

New BOM for better performance

 

dual PCB : SIZE=96mm X 55mm 

positive PCB : SIZE=77mm X 41mm

 

 

 

Use chassis to sink heat! Save space in your chassis

 

 

 

DUAL Gold Mini Regulator

 

 

How to set output voltage : 

R1 = R11 , R2 = R22

Output V = 2.5V * [ 1+ ( R1/R2 ) ]  (using LM336 2.5V for example)

example :  Output Voltage 15V = 2.5V * [ 1+ ( 5K / 1K ) ]

 

 

How to set maximum output current: 

R6 & R16 can set the current  , R6 = R16

Max output I = Q1  hfe* ( 1.8V / R6 )

example : Q1 hfe = 80 , R6 & R16 = 200R , 

                 Max output I = 80* ( 1.8V / 200R ) = 720mA

 

 

under +-30V:

When output I set high , R6/R16 will be smaller , Q3&Q4 . Q13&Q14 quiensent current will be higher ,

the higher the current, the faster the sound (for tuning ) ,please set to <15mA 

 

resistor must stand up (TOMBSTONE STYLE)

 

 

 please note the photo left :  ZD1&ZD2 on PCB , + means high voltage

 

  

Positive Gold Mini Regulator

 

 

 

 

How to set output voltage

output V = 2.5V * [ 1+ ( R1/R2 ) ]  (using LM336 2.5V for example)

example :  output V 15V = 2.5V * [ 1+ ( 5K / 1K ) ]

 

maximum current set:

R6 can set the max current,  max output I = Q1  hfe* ( 1.8V / R6 )

example : Q1 hfe=80 , R6&R16=100R , 

                 max output I = 80* ( 1.8V / 100R ) = 1.44A

 

 

only under +30V:

When output I set high , R6 is samller , Q3&Q4 quiesent current will be higher,

 The higher and the current, the faster the sound(for tuning) ,please set to <15mA 

 you can choose to use LM336 2.5V  or AD780AN voltage reference IC

 

resistor must stand up (TOMBSTONE STYLE)

 

 AD780 Application:

If you want to use AD780 as Voltage reference , please note :

   1. AD780 can only be installed on + 5V ~+18V regulation PCB

   2. Please install AD780 on IC2 , AN grade or BN grade will do 

   3. Do not install IC1 and Q5

   4. C11 --- 104 MLCC

   5. JP1 open , do not short 

        If you short JP1, the reference voltage of AD780 is 3.0V

 


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