Advertisements
By Bill Bowden
Source :: http://ourworld.compuserve.com/homepages/Bill_Bowden/page12.htm
The high current regulator below uses an additional winding or a separate transformer to supply power for the LM317 regulator so that the pass transistors can operate closer to saturation and improve efficiency. For good efficiency the voltage at the collectors of the two parallel 2N3055 pass transistors should be close to the output voltage. The LM317 requires a couple extra volts on the input side, plus the emitter/base drop of the 3055s, plus whatever is lost across the (0.1 ohm) equalizing resistors (1volt at 10 amps), so a separate transformer and rectifier/filter circuit is used that is a few volts higher than the output voltage. The LM317 will provide over 1 amp of current to drive the bases of the pass transistors and assumming a gain of 10 the combination should deliver 15 amps or more.
…
Read more good circuit
More Power supply Circuit
More Variable Regulator circuit
More about high current power supply Circuit
More circuit by IC LM317
power supply regulatable 0-28V 20Amp By LM317 and 2N3055
power supply regulator 0-28V 6A/8 Amp By LM317 and 2N3055
dc variable regulator 0-50V 2A by IC LM723 + 2N3055,BD140,A671
Variable regulator 0-35V 2A by IC LM723 + Transistor 2N3055 +BD140+A671
Variale Regulator 0-30V 5A by IC 723 + 2N3055 x2
3-30 V/2.5 A Stabilized power supply by LM723 and 2N3055
