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Totem pole configuration9/15/2023 ![]() ![]() ![]() This will prompt the IC to take necessary corrective measures by adjusting the output PWM, so that the voltage is restricted to the normal level. Now, if the output voltage tends to increase above this set limit, the feedback voltage would also increase proportionately and at some point exceed the reference limit. The feedback voltage should be adjusted to be just below the internal reference voltage value (5.1 V) when the output is normal. It is usually done by applying a feedback voltage from the output through a voltage divider network to the non-inverting input of the op amp (pin#1). Thus these EA pins 1 and 2 can be effectively configured for implementing an automatic the output voltage correction of a converter. It's a simple op amp arrangement inside the IC which controls the PWM of the IC outputs at Pin#11 and Pin#14. Pin#1 is the inverting input while pin#2 is the complementary non-inverting input. Pin#1 and #2 (EA inputs): These are inputs of the built-in error amplifier of the IC. The IC SG3525 is a single package multi function PWM generator IC, the main operations of the respective pin outs are explained with the following points: A practical implementation of the following pinout data may be understood through this inverter circuit ![]()
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