I greet all the members of the forum.
I apologize if maybe I posted in the wrong section, but in fact, the purpose is to fix a power supply of a car audio amplifier, so it seems right.
I'd like to understand one thing.
When we speak of "oscillating frequency of a switching power supply" do we speak of the frequency that is read on the gate of the mosfets, or of the triangular one (sawtooth) present on pin 5 of the TL494 or pin 6 of SG2525?
I apologize if maybe I posted in the wrong section, but in fact, the purpose is to fix a power supply of a car audio amplifier, so it seems right.
I'd like to understand one thing.
When we speak of "oscillating frequency of a switching power supply" do we speak of the frequency that is read on the gate of the mosfets, or of the triangular one (sawtooth) present on pin 5 of the TL494 or pin 6 of SG2525?
Oscillating frequency is the triangle frequency the pwm chip is set to. In push pull applications this frequency is halved at each branch of output.
The waveform is actually sawtooth. Yes. The oscillator frequency is 2x the output frequency. On each cycle of the oscillator, a flip-flop switches and steers the drive to an alternate output.