FDH34N40 datasheet(1/6 Pages) FAIRCHILD

Part #	FDH34N40

Description	34A, 400V, 0.115 Ohm, N-Channel SMPS Power MOSFET

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

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August 2002

FDH34N40 Rev. A,

FDH34N40

34A, 400V, 0.115 Ohm, N-Channel SMPS Power MOSFET

Applications

Switch Mode Power Supplies(SMPS), such as

• PFC Boost

• Two-Switch Forward Converter

• Single Switch Forward Converter

• Flyback Converter

• Buck Converter

• High Speed Switching

Features

• Low

Gate

Charge

Qg results in Simple Drive

Requirement

• Improved Gate, Avalanche and High Reapplied dv/dt

Ruggedness

• Reduced rDS(ON)

• Reduced Miller Capacitance and Low Input Capacitance

• Improved Switching Speed with Low EMI

• 175°C Rated Junction Temperature

Absolute Maximum Ratings T

C = 25°C unless otherwise noted

Thermal Characteristics

Symbol

Parameter

Ratings

Units

VDSS

Drain to Source Voltage

400

V

VGS

Gate to Source Voltage

±30

V

ID

Drain Current

34

A

Continuous (TC = 25

oC, V

GS = 10V)

Continuous (TC = 100

oC, V

GS = 10V)

24

A

Pulsed (Note 1)

136

A

PD

Power dissipation

Derate above 25oC

469

3.1

W

W/oC

TJ, TSTG

Operating and Storage Temperature

-55 to 175

oC

Soldering Temperature for 10 seconds

300 (1.6mm from case)

oC

Mounting Torque, 8-32 or M3 Screw

10ibf*in (1.1N*m)

RθJC

Thermal Resistance Junction to Case

0.32

oC/W

RθCS

Thermal Resistance Case to Sink, Flat, Greased Surface

0.24 TYP

oC/W

RθJA

Thermal Resistance Junction to Ambient

40

oC/W

D

G

S

Package

Symbol

DRAIN

(FLANGE)

DRAIN

SOURCE

GATE

JEDEC TO-247

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