KKA4605-2 Datasheet | Kodenshi AUK Group

FEATURES : - - - - - - - Fold - back characteristics provides overload protection for external ponents Burst operation under secondary short - circuit condition implemented Protection against open or short of the control loop Switch - off if line voltage is too low (undervoltage switch - off) Line voltage depending pensation of fold - back point Soft start for quiet start - up without noise generated by the transformer Chip - over temperature protection (thermal shutdown) On - chip ringing suppression circuit against parasitic oscillations of the transformer P-DIP-8-1 - In the different voltage ranges the switched - mode Power supply (SMPS) behaves as follow: No load operation. The Power supply is operating in the burst mode at typical 20 to 40 k Hz. The output voltage can be a little bit higher or lower than the nominal value depending on the design of the transformer and the resistors of the control voltage divider. Nominal operation. The switching frequency is reduced with increasing load and decreasing AC voltage. The duty factor primarily depends on the AC voltage. The output voltage is only depends on the load. Overload point. Maximum output Power is available at this point of the output characteristic. Overload. The energy transferred per operation cycle is limited at the top. Therefore the output voltages declines by secondary overloading. PIN DEFINITION Pin # 1. 2. 3. 4. 5. 6. 7. 8. Function Information Input Concerning Secondary Voltage Information Input Regarding the Primary Current Input for Primary Voltage Monitoring Ground Output Supply Voltage Input Input for Soft Start and Integrator Circuit Input for the Feedback of the Oscillator .. Block Diagram 6 2 5 Reference Voltage typ. 3V V2B Supply Voltage Monitor Primary Current Voltage Converter Output Stage and Current Control...