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Posted by JMM (194.167.137.11) on September 04, 2003 at 03:33:29:
In Reply to: TL494 Question posted by yg on December 23, 2001 at 04:27:06:
: Dear All,
: I'm trying to build a switching power supply using the TL494, in a single-ended
: configuration (with pin 8/11 connected, pin 9/10 connected). However, the original 12V
Sorry, I hit the wrong button :)
By doing so, the docs indicate that you short out 2 out of phase outputs. The 2 transistors conduct half of the time each and your output goes low. Is it what you obtain ? Check the docs. Now, how do you measure your 3v ? Are you using the basic circuit from the docs ? What is your output voltage ? If your oscillator is fine, you should have a pulsed output and measure an average control voltage between ~0v and 12V. 3v could be OK.
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