Contro IC for Switched-Mode Power Supplies using MOS-Transistors

 

 

Features

 Fold-back characteristics provides overload protection for

externa components

 Burst operation under secondary short-circuit condition

implemented

 Protection against open or a short of the contro loop

 Switch-off if line voltage is too low (undervoltage switch-off)

 Line voltage depending compensation of fold-back point

 Soft-start for quiet start-up without noise generated by the

transformer

 Chip-over temperature protection implemented (thermal

shutdown)

 On-chip ringing suppression circuit against parasitic

oscillations of the transformer

 AGC-voltage reduction at low load

 

 

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