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Text version of the page
| International iôr Rectifier | ||||||||||||||||
| APPLICATION NOTE | ||||||||||||||||
| Application Note AN-1018 | ||||||||||||||||
| Using The IRIS40xx Series Integrated Switchers By Jonathan Adams Table of Contents Page Part Selection Table........................................................................................1 Introduction.....................................................................................................1 Features..........................................................................................................2 Block Diagrams...............................................................................................3 Startup Circuit and Vcc Bias Supply...............................................................4 Feedback and Control Circuit Operation.........................................................6 Secondary Voltage Mode Control..............................................................7 Over-current Protection (OCP) Circuit.......................................................8 MOSFET Drive Circuit...............................................................................9 Latch Circuit...............................................................................................10 Thermal Shut-down Circuit........................................................................10 Over-voltage Protection Circuit..................................................................10 Quasi-Resonant Operation Mode...................................................................11 Calculating the Primary Inductance Lp of the Transformer........................12 Delay Circuit..............................................................................................12 How to obtain the constants of each part in Fig. 16...................................13 Switching Between Quasi-Resonant and PRC Operation.........................14 Variations of the Delay Circuit...................................................................15 Table of Contents continued on next page | ||||||||||||||||
| AN-1018 | ||||||||||||||||
| www.irf.com | ||||||||||||||||
| cover | ||||||||||||||||