Infineon ICE2QS03G Manual, Application Note

13, Converter design using the quasi-resonant PWM controller ICE2QS03G AN-PS0045 Application Note 13 7 April 2010 voltage increases. This is done through sensing the current flowing out from ZC pin when MOSFET is turned on. When the main power switch is turned on, the negat…

3, Application Note 3 7 April 2010 Title: ICE2QS03G Design Guide Revision History: 7 April 2010 V1.0 Previous Version: none Page Subjects (major changes since last revision) Converter design using the quasi-resonant PWM controller ICE2QS03G Li…

8, Converter design using the quasi-resonant PWM controller ICE2QS03G AN-PS0045 Application Note 8 7 April 2010 After the secondary side current falls to zero, the drains-source voltage of the power switch shows another oscillation (oscillation 2 in Figure 3, this is also mentione…

11, Converter design using the quasi-resonant PWM controller ICE2QS03G AN-PS0045 Application Note 11 7 April 2010 0.7V3.3V CS1 +⋅= [7] To avoid mistriggering caused by the voltage spike across the shunt resistor after switch-on of the main power switch, a 330ns leading edge …

2, Infineon ICE2QS03G Published by Infineon Technologies AG 81726 Munich, Germany © 2010 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any ex…

6, Converter design using the quasi-resonant PWM controller ICE2QS03G AN-PS0045 Application Note 6 7 April 2010 2.3.1 ZC (Zero Crossing) Three functions are incorporated at the ZC pin. First, during MOSFET off time, the de-magnetization of the transformer is detected when the ZC volt…