Fairchild FDD8451 User's Manual
Summary
Discover high performance with this N-Channel PowerTrench MOSFET, ideal for enhancing DC/DC converters and backlight inverters. Engineered for extremely low gate charge and superior switching speed, it maximizes efficiency in synchronous and conventional PWM controllers. This comprehensive datasheet provides power users—including electronics engineers and design specialists—with all necessary electrical characteristics, maximum ratings, and detailed performance curves to ensure reliable integration into demanding power electronic applications.
Page 1 Text Content
-C l P r T re
May 2009
FDD8451
N-Channel Power Trench® MOSFET 40V, 28A, 24m Features General Description Max r DS(on) 24m at VGS = 10V, ID = 9A This N-Channel MOSFET has been designed specifically
to improve the overall efficiency of DC/DC converters using
Max r DS(on) 30m at VGS = 4.5V, ID = 7A either synchronous or conventional switching PWM
controllers. It has been optimized for low gate charge, fast
Low gate charge
switching speed and extremely low r DS(on).
Fast Switching
Application
High performance trench technology for extremely low
DC/DC converter
r DS(on)
FR EE
Backlight inverter
Ro HS compliant
MOSFET Maximum Ratings TC = 25°C unless otherwise noted
Symbol Parameter Ratings Units VDS Drain to Source Voltage
VGS Gate to Source Voltage ±20 Drain Current -Continuous @TC=25°C
ID (Note 1a) A -Continuous @TA=25°C
-Pulsed 78 EAS Single Pulse Avalanche Energy (Note 3) m J PD Power Dissipation 30 TJ, TSTG Operating and Storage Temperature -55 to 150 °C
Thermal Characteristics
Thermal Resistance, Junction to Case 4.1 °C/W
JA Thermal Resistance, Junction to Ambient (Note 1a) °C/W JA Thermal Resistance, Junction to Ambient (Note 1b) °C/W
Package Marking and Ordering Information Device Marking Device Package Reel Size Tape Width Quantity FDD8451 FDD8451 D-PAK(TO-252) 13’’ 12mm 2500 units
©2009 Fairchild Semiconductor Corporation www.fairchildsemi.com1 FDD8451 Rev. B2
Page Summary Contents For Fairchild FDD8451 User's Manual
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 6 |
| File Size | 225.81 KB |
| Published | July 16, 2026 |
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Frequently Asked Questions
What applications is this MOSFET designed for?
It has been optimized for improving DC/DC converters using either synchronous or conventional switching PWM controllers.
How do I ensure my current part purchase is authentic?
Purchase parts directly from Fairchild or an Authorized Distributor to guarantee full traceability and genuine quality standards.
What determines the device's overall thermal resistance (R)?
The total resistance (R) is calculated as the sum of the junction-to-case ($T_{JC}$) and case-to-ambient ($T_{CA}$) thermal resistances.
What are the specified limits for operating temperature?
The MOSFET has an operating temperature range of -55 to 150 °C.