+/-15V power supply using LM317 and LM337 regulator ICs

[cyw1984]

+/-15V power supply using LM317 and LM337 regulator ICs

How to designa +/-15V power supply using LM317 and LM337 regulator ICs.
Thx

The voltage is used to DAC (AD669)


I have try to design the circuit....
Is it Right??

 

[audioguru2]

Hi Cyw,
Your circuit is correct for a dual-polarity supply having adjustable output voltages from 1.25V to about 27V.
You don't need an input voltage as high as 30V when anything more than 18V will be fine.
You don't need pots to adjust the output voltages when 2.7k (5%) resistors are fine to produce 15.3V outputs. ;D

 

[cyw1984]

Hi Cyw,
Your circuit is correct for a dual-polarity supply having adjustable output voltages from 1.25V to about 27V.
You don't need an input voltage as high as 30V when anything more than 18V will be fine.
You don't need pots to adjust the output voltages when 2.7k (5%) resistors are fine to produce 15.3V outputs. ;D

Thanks a lot~~
I need pots to adjust the output voltage
because it is use for  V reference .....

My AD669 DAC Vref is given by this +-10V

 

[Alun]

Can't you just use a 2.4K resistor with a 500R trimmer in series?

 

[audioguru2]

I need pots to adjust the output voltage
because it is use forView attachment 37686

 

[moutoulos]

View attachment 37687

 

[cyw1984]

 

[audioguru2]

+- 15V is provide thw power of AD669 (VCC,CEE)

Then since the supply range of the IC is very wide, you don't need the pots, just 2.7k resistors instead for +-15.3V.