kumar_prashu
- Sep 14, 2004
- 34
- Joined
- Sep 14, 2004
- Messages
- 34
Hello
I m trying to make a variable voltage Rectified power supply using LM338. But i am facing an unusual problem of ripple at the output of LM338. when I set the Output at the particular voltage, the ripple current at the output just doubles the DC value.
just as if DC o/p = 12 volts.
AC o/p = 24 volts.
The exact specs. of the components are as follows:
Transformer- 220/15-0-15 volts, 5 Amps. (center tapped)
Diodes- MIC 6A4
Cap.- 10,000 microfarad /25 volts.(at the o/p of rectifier)
large value is just to keep the low ripple
LM338: 0-5 Amps. input- output differential voltage = 3 volts
Why do this happens.
pls explain.
I want to completely remove the ripple content.
I m trying to make a variable voltage Rectified power supply using LM338. But i am facing an unusual problem of ripple at the output of LM338. when I set the Output at the particular voltage, the ripple current at the output just doubles the DC value.
just as if DC o/p = 12 volts.
AC o/p = 24 volts.
The exact specs. of the components are as follows:
Transformer- 220/15-0-15 volts, 5 Amps. (center tapped)
Diodes- MIC 6A4
Cap.- 10,000 microfarad /25 volts.(at the o/p of rectifier)
large value is just to keep the low ripple
LM338: 0-5 Amps. input- output differential voltage = 3 volts
Why do this happens.
pls explain.
I want to completely remove the ripple content.
