Isolated-feedback-power-supply


Posted on May 6, 2012

The diagram is a power supply circuit using the isolated feedback capabilities of the TL3103 for both current and voltage sensing. This supply is powered fromthe ac power line and has an output of 5 Vat 1.5 A. Both output voltage and current are sensed and the error voltages are applied to the error amplifiers of the TL594 PWM control !C. The 24-V transformer produces about 35 Vat the 1000-I`F filter capacitor. The 20-kHz switching frequency is set by the 6-KO resistor and the 0.01-I`F capacitor on pins 6 and 5, respectively.


Isolated-feedback-power-supply
Click here to download the full size of the above Circuit.

The TL594 is set for push-pull operation by typing pin 13 high. The 5-V reference on pin 14 is tied to pin 15, which is the reference or the current error amplifier. The 5-V reference is also tied to pin 2 which is the reference for the output voltage error amplifier. The output voltage and current limit are set by adjustment of the 10-KO pots in the TL3103 error-sensing circuits. A pair of TIP31E npn transistors are used as switching transistors in a push-pull circuit.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

FrontDesigner 3.0
Bench Power Supply circuit
Electronic potentiometer schematic
Door open alarm
Audio Distortion Meter Circuit with Diagram
1.8MHz AM transmitter and receiver
Analog video switch and amplifier with direct coupled output
RC relaxation type tone control circuit



Top