in this video i demonstrated how to calculate & design TL494 Error Amplifier for Voltage Mode Feedback for Regulation & Current Mode Error Amplifier for short circuit protection, in this practical tutorial i calculated to apply reference voltage at inverting input of error amplifier to produce a comparable standard to the ic to compare the feedback input. for reference voltage i used a voltage divider network and connected it between the pin number 14 (5 v reference output of TL494) the output voltage are divided by calculating the ratio between both resistance and the center node is connected to the error amplifier non inverting input and a feedback resistance is added to pin number 2 and for short circuit protection the load current is used to flow through a shunt resistance and the dropped voltage are applied to current mode error amplifier, when the voltage value at will equal or above than then the reference voltage at pin 15, this ic will disable the pwm comparator in pwm section to enable current Protection #TL494 / TL495 pulse width modulation control ic in switch mode power supply or ATX computer power supply. i explained how to use this ic in push pull mode to drive half bridge or push pull circuit. it can be programmed from 1KHz to 300KHz switching frequency . its frequency depend on RT timing resistance and CT timing capacitor
the deadtime function generates a off periode between the switching time of both mosfets. most commonly the amount of soft start is allocated for 25 to 100 switching cycles.
this is continuation of inverter circuit, tl494 is smps pwm pulse width modulation controller ic to drive push pull driver, it can also drive half bridge