Precision tandem type power supply circuit diagram

Posted on Mar 28, 2007

Circuit shown in Figure secondary N3 center tap and transformer T common point diode VD2, VD3 positive and capacitance C2, C6, C7 and negative electrode capacitance C9, C10 and

Precision tandem type power supply circuit diagram
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other components connected to the positive electrode and the ground, which ground zero. + 5V power supply using a manifold excellent performance of CA723, as an automatic adjustment of the output voltage. By a rectifier diode VD1, filter capacitor C1, a positive DC voltage U1 acquired 11 feet to the CA723, CA723 of 6 feet at a constant voltage, the resistors R4, R5 and R6 partial pressure, the 5 foot can get to a reference voltage. If the + 5V output terminal voltage increases, the potential of 4 feet elevated CA723, CA723 after the comparator compares the comparison signal is fed to the error amplifier output pin 10 to adjust the low potential tube VT1 base, make VT1 between the collector and emitter voltage increases, the output voltage decreases, to achieve automatic voltage regulator. If the output voltage is reduced, the entire change process will vary in the opposite direction. Main Specifications: Input voltage: 220V, 50Hz, allowable voltage variation of plus or minus 10%; DC output voltage and load current: + 5V 2A, + 12V 1A, -12V 1A; Output ripple 30mA; Output Voltage adjustment range: positive negative 0.5V; the power supply overload and short circuit protection device; transformer T parameters: power: 35VA, N2: 2x12V, N3: 2x15V; ambient temperature: -10 to +40 degrees Celsius.

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