13.8V 250W PC POWER SUPPLY MODIFIED SCHEMATIC CIRCUIT DIAGRAM
A different mode 🙂 Pc power supply transformers are used in the control controller SG3525 and primary drive transistors IRF730 but the driver has to wrap the transformer by yourself unfortunately the original PSU driver transformer’s version voltage is not enough for fetuses
250 W SMPS with Power FET beautiful project yield used MOSFETs, though higher net system made straightening with a method I do not know exactly designed accordingly normally rectified by said output of the power transformer that has two IRFZ44N used clear if they deemed diode 🙂
Drive Transformer BJT type winding secondary transformers according to BJT type transistors.
If you have a strong powersupply, you can see how many volts the drive transformer has by canceling the primary part in your hand and simply arranging it to the control floor and drive transformer.
I have given an example in the picture, but the powerde material values in the structure may be different is usually the cheapest standard power lerde 🙂 Check the same test TL494 or standard in the datasheet file can be used in the test all parts used in the project all the details can be found all the details scop measurements transformer information will make friends easy to come 🙂
The TL494 device contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.
The error amplifiers exhibit a common-mode voltage range from –0.3 V to VCC – 2 V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies.
- Complete Pulse Width Modulation Control Circuitry
- On−Chip Oscillator with Master or Slave Operation
- On−Chip Error Amplifiers
- On−Chip 5.0 V Reference
- Adjustable Deadtime Control
- Uncommitted Output Transistors Rated to 500 mA Source or Sink
- Output Control for Push−Pull or Single−Ended Operation
- Undervoltage Lockout
- NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes
- Pb−Free Packages are Available*