FA5639 Fuji Switching Power Supply Control IC Green Mode PWM-IC FA5639 Application Note April-2011 Fuji Electric co.,Ltd. Fuji Electric Co., Ltd. AN-085E Rev.1.0 Apr-2011 1 http://www.fujielectric.co.jp/products/semiconductor/ FA5639 Caution 1. The contents of this note (Product Specification, Characteristics, Data, Materials, and Structure etc.) were prepared in April 2011. The contents will subject to change without notice due to product specification change or some other reasons. In ca.