IRFR3709ZPBF datasheet(7/12 Pages) IRF

Part #	IRFR3709ZPBF

Description	High Frequency Synchronous Buck Converters for Computer Processor Power

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Manufacturer	IRF [International Rectifier]

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IRFR/U3709ZPbF

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7

Fig 15.

Peak Diode Recovery dv/dt Test Circuit for N-Channel

HEXFET® Power MOSFETs

Circuit Layout Considerations

• Low Stray Inductance

• Ground Plane

• Low Leakage Inductance

Current Transformer

P.W.

Period

di/dt

Diode Recovery

dv/dt

Ripple

≤ 5%

Body Diode

Forward Drop

Re-Applied

Voltage

Reverse

Recovery

Current

Body Diode Forward

Current

VGS=10V

VDD

ISD

Driver Gate Drive

D.U.T. ISD Waveform

D.U.T. VDS Waveform

Inductor Curent

D =

P.W.

Period

* VGS = 5V for Logic Level Devices

*

+

-

+

-

RG

VDD

• dv/dt controlled by RG

• Driver same type as D.U.T.

• ISD controlled by Duty Factor "D"

• D.U.T. - Device Under Test

D.U.T

Fig 16. Gate Charge Waveform

Vds

Vgs

Id

Vgs(th)

Qgs1 Qgs2

Qgd

Qgodr

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