PWM

Thread Starter

mermerzac

Joined Feb 9, 2012
30
Hi everyone!

May I know what will be the output at C1 and C2 if i connect the PWM Control circuit as the picture attached below?
I'm still not clear about this PWM TL494 operation after studying the datasheet.

Thanks!!
 

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R!f@@

Joined Apr 2, 2009
9,682
They are the outputs to drive the driver transistor which I believe is a totem pole stage which handles the power switch drive.

C1 & C2 will have pulses which is called the PWM signals.
 

Thread Starter

mermerzac

Joined Feb 9, 2012
30
Check page 12 on this link- http://www.ti.com/lit/an/slva001e/slva001e.pdf The out put can either be both at the same time or alternating depending on the voltage on pin #13. But both out puts are at the same PWM signal.
referring to pg 12 on the link http://www.ti.com/lit/an/slva001e/slva001e.pdf, if i want to get alternating output, i need to connect pin 13 to Vref right?
will the output waveform at C1 and C2 has overlapping or it will be completely complementary without overlapping?
 

shortbus

Joined Sep 30, 2009
7,078
referring to pg 12 on the link http://www.ti.com/lit/an/slva001e/slva001e.pdf, if i want to get alternating output, i need to connect pin 13 to Vref right?
will the output waveform at C1 and C2 has overlapping or it will be completely complementary without overlapping?
Yes to the Vref on pin 13.

Figure #14 shows the timing diagram for the output. Page 13 explains the flip-flop logic of the output.
 
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