www.fairchildsemi.com AN-7732 FL7732 Design Tool Flow (Flyback) Overview This document is intended to provide in-depth guidance to using the Fairchild Design Tool for FL7732. Use the Design Tool with the product datasheet. Figure 1. Design Flow © 2011 Fairchild Semiconductor Corporation Rev. 1.0.1 • 4/20/12 www.fairchildsemi.com AN-7732 APPLICATION NOTE Step 1 — Enter Input Output Specification Step 2 — Transformer Design © 2011 Fairchild Semiconductor Corporation Rev. 1.0.1 • 4/20/12 www.fairchildsemi.com 2 AN-7732 APPLICATION NOTE Step 3 — Snubber Design Step 4 — Control Circuit Design Step 5 — Power Device Design © 2011 Fairchild Semiconductor Corporation Rev. 1.0.1 • 4/20/12 www.fairchildsemi.com 3 AN-7732 APPLICATION NOTE Related Resources Locate the Design Tool at: http://www.fairchildsemi.com/design_tools/led-driver-design-tool/ Consult the product datasheet at: FL7732 —Single-Stage PFC Primary-Side-Regulation Offline LED Driver Follow us on Twitter at: twitter.com/fairchildSemi View product and company videos, listen to podcasts, and comment on our blog at: www.fairchildsemi.com/engineeringconnections Visit us on Facebook at: www.facebook.com/FairchildSemiconductor DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. © 2011 Fairchild Semiconductor Corporation Rev. 1.0.1 • 4/20/12 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 4