HFA135NH40PBF datasheet(5/7 Pages) VISHAY

Part #	HFA135NH40PBF

Description	HEXFRED® Ultrafast Soft Recovery Diode, 275 A

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Manufacturer	VISHAY [Vishay Siliconix]

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5 / 7 page

Document Number: 94050

For technical questions, contact: ind-modules@vishay.com

www.vishay.com

Revision: 01-Aug-08

5

HFA135NH40PbF

HEXFRED®

Ultrafast Soft Recovery Diode,

275 A

Vishay High Power Products

Fig. 10 - Reverse Recovery Parameter Test Circuit

Fig. 11 - Reverse Recovery Waveform and Definitions

Fig. 12 - Avalanche Test Circuit and Waveforms

IRFP250

D.U.T.

L = 70 µH

V

R = 200 V

0.01

Ω

G

D

S

dI

F/dt

adjust

Q

rr

0.5 I

RRM

dI

(rec)M/dt

0.75 I

RRM

I

RRM

t

rr

t

b

t

a

I

F

dI

F/dt

0

(1)

(2)

(3)

(4)

(5)

(1) dI

F/dt - rate of change of current

through zero crossing

(2) I

RRM - peak reverse recovery current

(3) t

rr - reverse recovery time measured

from zero crossing point of negative

going I

F to point where a line passing

through 0.75 I

RRM and 0.50 IRRM

extrapolated to zero current.

(4) Q

rr - area under curve defined by trr

and I

RRM

t

rr x IRRM

2

Q

rr =

(5) dI

(rec)M/dt - peak rate of change of

current during t

b portion of trr

V

(AVAL)

V

R(RATED)

I

L(PK)

Decay

time

Current

monitor

High-speed

switch

D.U.T.

R

g = 25 Ω

+

Freewheel

diode

V

d = 50 V

L = 100 µH

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