PWM with TL494 - Good and Bad IC. Feedback change analysis.
How the Pulse Width Modulation works with IC TL494 from Texas Instruments.
Parameter Measurement Information - Test circuit with test inputs:
Pin 3 - Feedback, here connected to LAB power supply, 0 up to +3V DC
Pin 4 - DTC (Dead-time control comparator input), here connected to GND
One is good, another shows shadows on an oscilloscope. Is it then broken?