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UC1845AMDREPG4 датащи(PDF) 5 Page - Texas Instruments

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номер детали UC1845AMDREPG4
подробное описание детали  CURRENT-MODE PWM CONTROLLER
Download  9 Pages
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

UC1845AMDREPG4 датащи(HTML) 5 Page - Texas Instruments

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Document Number: 94083
For technical questions, contact: diodestech@vishay.com
www.vishay.com
Revision: 08-Apr-10
5
VS-MURB2020CTPbF, VS-MURB2020CT-1PbF
Ultrafast Rectifier,
2 x 10 A FRED Pt®
Vishay High Power Products
Fig. 9 - Reverse Recovery Parameter Test Circuit
Fig. 10 - Reverse Recovery Waveform and Definitions
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


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