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Dual Output Power Supply +/-53V / 3A based on Transistors

2015-03-19 04:59  
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Dual Output Power Supply +/-53V / 3A based on Transistors
This is the circuit diagram of dual output power supply +/-53V / 3A based on transistors. This circuit has been designed for audio amplifier power supply requires a symmetrical + / -53 V (+ / -56 V maximum). The role of the circuit part presented here is to lower the voltage of both positive and negative lines of + / -65 V for non-hazardous + / -53 V for the amplifier, while allowing the current to 3 A in continuous operation. The diagram above, based on the same principle as the previous circuit Dual supply + /-15V-based transistors, and is based on the use of common components. Differences of Dual supply + /-15V-based transistors, lies only in the number of transistors connected in cascade to allow high output currents while not requiring a zener diode of 10 W for output voltage stabilization. The main advantage of this type of configuration is to have a high current gain. The second point is not important in this case. Power dissipation in the ‘final’ two transistor Q3, and Q6 to 3 A output current, is about 36 W, which require a large heatsink. Transistors Q2 and Q5 is recommended fitted fin heat sink (for TO5 case).