TL494 Constant Current and Constant Voltage

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circuit1234

Joined Jan 7, 2015
22
Hi
can anyone help me to make work the constant current circuit with TL494 Half bridge config , Constant Voltage is working ,
in constant current mode even the the ic can control the current the wave form is oscillating in sawtooth shape at 50hz to 100hz in some range like 0.5amps to 0.65
and 0.8 to 0.9 , other range is ok

My SMPS is 100Volt and 1Amps CVCC, running at 100khz , attached is the TL494 pic config and the feedback loop compensation , PIN 16 , and 15 is assigned for current sensing , if feedback compensation is the please help me to design the feedback loop
 

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