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DAP011

PWM Current−Mode Controller for High−Power Universal Off−Line Supplies

ON Semiconductor 

DAP011/DAP011C

2. In the second case, the converter operates in

regulation, but the output is severely overloaded.

However, due to the bad coupling between the

power and the auxiliary windings, the controller

VCC does not go low. The peak current is pushed

to the maximum and the timer starts to count.

Upon completion, all pulses are stopped and dual

startup hiccup mode is entered. If the fault goes

away, the SMPS resumes operation.

Figure 24. This Case is Similar to a Short−circuit Where VAUX Does Not Collapse

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