300 Watt Half Bridge SMPS Using TL494, Circuit Explained & Troubleshooting & Circuit Diagram . how to repair smps switch mode power supply
Download 12V 25A 300W TL494 based Half Bridge SMPS circuit diagram https://bit.ly/3y9RJ4g'>https://bit.ly/3y9RJ4g

in this tutorial i explained the functional description of this industrial power supply it provides nominal 12 volt and 25 Ampere. the output voltage can be adjusted from 10.5 to 15 volt. its switching frequency is 48KHz and the push pull output is 24 KHz. it have 13009K transistor to switch the high frequency power transformer's primary winding. i demonstrated How To Repair SMPS Switch Mode Power Supply and explained Step by Step Practical Troubleshooting. also explained easiest circuit working with logical troubleshooting and fault finding techniques to find the faults in any switching mode power supply. it uses fix frequency and the output voltage are regulated using pulse width modulation technique.

Download 300W TL494 based Half Bridge SMPS circuit diagram
https://drive.google.com/file/d/1E9vG...
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its voltage mode error amplifier is biased at 2.5 volt using reference voltage and the pin number 1 is connected to the output point. which is used to regulate the voltage using PWM technique. current mode error amplifier is connected to the current sense shunt resistance, which provides the dropped voltage across the shunt resistance and it limits the switching to protect the converter from overcurrent conditions.

HOW TO REPAIR SMPS
how to repair smps switch / switching mode power supply repair tutorial.
very easy & step by step repair of SMPS
smps practical troubleshooting tutorial,
practical circuit tracing of smps with circuit diagram.
how to repair mobile charger / computer power supply / laptop charger / led lcd tv power supplies /


WORKING of SMPS
basic working of switching mode power supply
how smps switching mode power supply works
block diagram of smps switch mode power supply
12 volt 25 amp, 300 Watt Half Bridge SMPS Using TL494 / ka7500 circuit explained
how to make / design smps switch mode power supply
smps power supply circuit design / circuit diagram with explanation
what is optocoupler or optoisolator and what is its function in feedback circuit
function of FET, MOSFET, BJT, IGBT or switching modules
how to test bridge rectifier circuit
EMI filter explained
snubber circuit explained
surge current protection circuit
tl494 smps circuit diagram
12V smps switch mode power supply circuit diagram explanation
atx power supply circuit diagram explained

Common Faults in SMPS.
smps voltage fluctuation,smps output voltage fluctuation
whistle sound or excessive noise or excessive heat or hmm sound.
smps have short circuit in secondary
fluctuating output or output voltage unregulated
SMPS is dead or no output. smps ic have no switching frequency,
fuse keeps blowing / short circuit at input
short circuit protection is active
current sense problem. not providing rated output power
soft start circuit / start up circuit explained.
00:00:00 Introduction
00:02:22 EMI Circuit Electromagnetic Interference
00:03:23 How to Test Fuse
00:04:09 How To Test Input Resistance
00:06:44 Fuse Keeps Blowing
00:07:26 Bridge Rectifier