Voltase hobby

Build a +15V 1 a Regulated Power Supply Circuit Diagram. This is a simple +15-V-1-a-regulated-power-supply schema diagram. The supply receives + 20 Vdc from the rectifier/filter section. This is applied to pins 11 and 12 of the uA723, as well as to the collector of the 2N3055 series-pass transistor. The output voltage is sampled through R1 and R2, providing about 7 V with respect to ground at pin 4. 

The reference terminal at pin 6 is tied directly to pin 5, the non inverting input of the error amplifier. For fine trimming the output voltage, a potentiometer can be installed between R1 and R2. A 100-pF capacitor from pin 13 to pin 4 furnishes gain compensation for the amplifier. Base drive to the 2N3055 pass transistors furnished by pin 10 of the uA 723. Since the desired output of the supply is 1 A. maximum current limit is set to 1.5 A by resistor Rsc whose value is 0.433 0. A 100-J

The schema was designed to build a Regulated Power Supply with Stability at 3A will provide a regulated voltage from 40 V to 70 V in a 3 A current.

There are times when some applications are requiring a regulated power supply that has relatively high output voltage and stability. All of these features are being attained in the design of this schema. The voltage output of the schema can range from 40 V up to 60 V while carrying a current of 3 A while providing stabilization. The construction of the schema is very simple since the components used were available easily in the market. The only thing that matters is how the connection will be ensured.

During the operation, when the schema is delivering 50 V up to 60 V, the transistor Q1 will be hot enough and would require a large heatsink. For voltage output higher than 50 V up to 70 V, the stability of the schema may be found unsatisfactory. This is the reason why the ideal output voltage of the schema is 45 V up to 60 V. In order to alter the output voltage from 40 V up to 70 V, a 470 Ohms potentiometer RV1 is used for the adjustments. However, the potentiometer may also be replaced by two constant resistors with suitable values when the schema adjustment has been done. This is due to the fact that the use of a potentiometer may lead to a 3 V of over voltage.

Regulated Power Supply with Stability at 3A Circuit Diagram

As a reminder, the positive output of the schema should be connected at point A while the 0 V output should be connected at point B. The 0 V reference should not be connected to the ground for the schema to function properly. the use of this 3 A power supply with an average of 50 V schema may be found on various applications that normally requires this rating.

Since this type of schema is easily built, it is being utilized in industrial, educational, clinical, and laboratory facilities. It may come with different additional features such as reduced ripple & noise, overload protection, and short schema & high current protection.