FQD4N25 / FQU4N25 N-Channel QFET MOSFET 250 V, 3 A, 1.75Ω Description This N-Channel enhancement mode power MOSFET is produced using Fairchild Semiconductor®’s proprietary planar stripe and DMOS technology. This advanced MOSFET technology has been especially tailored to reduce on-state resistance, and to provide superior switching performance and high avalanche energy strength. These devices are suitable for switched mode power supplies, active power factor correction (PFC), and electronic lamp ballasts. Features • 3 A, 250 V, RDS(on) = 1.75 Ω (Max) @VGS = 10 V, ID = 1.5 A • Low Gate Charge (Typ. 4.3 nC) • Low Crss (Typ. 4.8 pF) • 100% Avalanche Tested ! " + 7 ! )*' &' 2-.''84 + ; + < 7 : (! < ,!(! < : >, !!$ : 2 -)*84? (! !$ : : < + ( .9 ( .) ( ±&' + *) &' ( &/ ** )* = +$ @ &/ ' )9 **A.*' @ @$8 8 &'' 8 : 2-)*84 "!)*8 , B .$5 * " " + 2-)*84 7 ! " ! = ,θ , = ( " ? *' 8@ ,θ , = ( " ..' 8@ , = &3 8@ ,θ ©2005 Fairchild Semiconductor Corporation FQD4N25 / FQU4N25 Rev. 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" '' # #$ ©2005 Fairchild Semiconductor Corporation FQD4N25 / FQU4N25 Rev. C0 www.fairchildsemi.com FQD4N25 / FQU4N25 N-Channel MOSFET !" FQD4N25 / FQU4N25 N-Channel MOSFET # 01 &$ -: -- 9 / 80 -- 9 40 80 #. "! # 01 &$ 40 8 ) 40 *-5 44 80 80 -5 2 $ 3 "! # 01 &$ 40 400 .0 .0 400 44 400 .0 4 8 44 4 40 44 ©2005 Fairchild Semiconductor Corporation FQD4N25 / FQU4N25 Rev. C0 www.fairchildsemi.com FQD4N25 / FQU4N25 N-Channel MOSFET 4 . 5# 01 &$ 40 ! 04 " 8 80 44 !" ########################## ; 04 44 ©2005 Fairchild Semiconductor Corporation FQD4N25 / FQU4N25 Rev. C0 www.fairchildsemi.com FQD4N25 / FQU4N25 N-Channel MOSFET Mechanical Dimensions D - PAK Dimensions in Millimeters ©2005 Fairchild Semiconductor Corporation FQD4N25 / FQU4N25 Rev. C0 www.fairchildsemi.com FQD4N25 / FQU4N25 N-Channel MOSFET Mechanical Dimensions I - PAK Dimensions in Millimeters ©2005 Fairchild Semiconductor Corporation FQD4N25 / FQU4N25 Rev. C0 www.fairchildsemi.com *Trademarks of System General Corporation, used under license by Fairchild Semiconductor. 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. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. 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 FAIRCHILD SEMICONDUCTOR CORPORATION. As used here in: 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, and (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 a significant injury of the user. 2. A critical component in 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. ANTI-COUNTERFEITING POLICY Fairchild Semiconductor Corporation’s Anti-Counterfeiting Policy. Fairchild’s Anti-Counterfeiting Policy is also stated on our external website, www.Fairchildsemi.com, under Sales Support. Counterfeiting of semiconductor parts is a growing problem in the industry. All manufactures of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard performance, failed application, and increased cost of production and manufacturing delays. Fairchild is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. Fairchild strongly encourages customers to purchase Fairchild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above. Products customers buy either from Fairchild directly or from Authorized Fairchild Distributors are genuine parts, have full traceability, meet Fairchild’s quality standards for handing and storage and provide access to Fairchild’s full range of up-to-date technical and product information. Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address and warranty issues that may arise. Fairchild will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources. Fairchild is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Advance Information Formative / In Design Datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Preliminary First Production Datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. No Identification Needed Full Production Datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve the design. Obsolete Not In Production Datasheet contains specifications on a product that is discontinued by Fairchild Semiconductor. The datasheet is for reference information only. Rev. I64 ©2005 Fairchild Semiconductor Corporation FQD4N25 / FQU4N25 Rev. C0 www.fairchildsemi.com FQD4N25 / FQU4N25 N-Channel MOSFET TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended to be an exhaustive list of all such trademarks. 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