Conclusions

The three basic configurations of L6561-based flyback converters have been presented. The common

characteristics, as well as the ones peculiar of each configuration have been analised.

A number of application examples has been presented for each category. They highlight how simple and

cheap but, this notwithstanding, well-performing L6561-based systems are.

It does not sound out of place, therefore, to say that the L6561 can be considered as a really interesting

alternative to today’s high-runner current mode controllers, especially where quite good performance

and robustness are required at low cost.

References

[1] "L6561, Enhanced Transition Mode Power Factor Corrector", (AN966)

[2] "L6561-based Switcher Replaces Mag Amps in Silver Boxes", (AN1007)

[3] "Design Equations of High-Power Factor Flyback Converters Based on the L6561", (AN1059)

[4] "L4955 Family Application Guide", (AN932)

[5] "TSM101 Voltage and Current Controller", Datasheet

AN1060 APPLICATION NOTE

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