Los Frijoles
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I have built a boost converter as shown in the image below. Normally the pwm runs at a 70% duty cycle @ 15khz to give an output voltage of around 12V. However, when I connect any sort of load to the 12V out pin, the voltage immediately drops to 7-ish volts. The load is less than 100mA and actually may be less than 50mA (I do not have a very accurate ammeter on my 12V supply when I am running this thing without the boost converter).
Is there anything blatantly wrong with this circuit? According to my dad (who designs these for a living), a boost converter should not be dropping down that low on that small of a load. When I activate the PI loop that I have running on the pwm based on the analog feedback, it is unable to compensate for the voltage drop and hits the saturation point very quickly and the circuit has to be shut off.
Is there anything blatantly wrong with this circuit? According to my dad (who designs these for a living), a boost converter should not be dropping down that low on that small of a load. When I activate the PI loop that I have running on the pwm based on the analog feedback, it is unable to compensate for the voltage drop and hits the saturation point very quickly and the circuit has to be shut off.