Product Change Notice Notice: #111715 Spec Change Announcement Date: Nov 17, 2015 To Our Valued Customer: We appreciate your use of VI Chip products. Our commitment to customer satisfaction is demonstrated by our notification to you of the following change. Description: Efficiency specifications changes been made to enhance yield. These changes do not impact realistic PRM operating conditions. The 25C specification changes are not expected to impact any existing designs or design practices related to the PRM. Datasheet specifications at 100C reflect minimum and typical efficiency performance. Product Affected: Product Part Number Changes Specification Old Value New Value Reason Efficiency 25C Nom Line Full Load 95.7% Min 94.8% Min, 96.0% Typ 95.25 Min 94.0% Min, 95.0% Typ Yield 94.8% Min 93.25% Min Yield 95.0% Min 93.5%Min Yield Efficiency 25C Nom Line 50% Load PRM48AH480T200A00 Efficiency 25C Low Line to High Line at Full Load Efficiency 100C Low Line to High Line at Full Load Yield Effective Date code: All products manufactured on or after August 3 – 8, 2015. Date Code = DC1532. Actions Required: Customers should review data sheets of suggested product for suitability as replacements in each application, and contact a Vicor applications engineer with any technical questions. Technical Marketing contact: Travis Williams [email protected] Vicor, 25 Frontage Road, Andover MA01810, Tel: (978) 470-2900, FAX: (978) 475-6715 p1/1