Overclocked
Member
I am using a LM317T in constant Voltage mode (well adjustable- but constant). Data Sheet says it can supply a minimum of 1.5A, and can supply a maximum of 3.4A (typical rating is 2.2A). I might not be pulling that much current now, but there is always the option of having it there. The transformer is rated for 12.25V RMS and can supply 4A. 3.4A is fine with me, but would it be a good practice to still use a pass transistor to supply the remaining current?
The way I figure it, using the right resistor, I can have the Vreg regulate 2A of current and have the pass transistor pass the other 2 A to share the load equally.
Also, What value of capacitance per amp do I need for a linear PSU? Ive heard Values of 2,000uF per amp All the way up to 80,000 uF Per amp (this was from a article in Nuts and volts)! 80,000 uf Is Way too much, but 2,000uF to 3,000uF Per Amp seems just fine. True or not?
The way I figure it, using the right resistor, I can have the Vreg regulate 2A of current and have the pass transistor pass the other 2 A to share the load equally.
Also, What value of capacitance per amp do I need for a linear PSU? Ive heard Values of 2,000uF per amp All the way up to 80,000 uF Per amp (this was from a article in Nuts and volts)! 80,000 uf Is Way too much, but 2,000uF to 3,000uF Per Amp seems just fine. True or not?