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UCC28950PW Datasheet(PDF) 46 Page - Texas Instruments

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Part # UCC28950PW
Description  Green Phase-Shifted Full-Bridge Controller
Download  74 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

UCC28950PW Datasheet(HTML) 46 Page - Texas Instruments

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QE _ RMS
SRMS
I
I
36.0 A
=
=
dsQE
OSS _ QE _ AVG
OSS _ SPEC
ds _ spec
V
C
C
1.6nF
V
=
»
OSS _ SPEC
C
1810pF
=
ds _ spec
V
25 V
=
INMAX
dsQE
V
V
19.5 V
a1
=
»
ds(on)QE
R
3.2m
=
W
g
QE
152nC
=
UCC28950
SLUSA16C – MARCH 2010 – REVISED NOVEMBER 2015
www.ti.com
8.2.2.8 Select FETs QE and QF
Selecting FETs for a design is an iterative process. To meet the power requirements of this design, we select 75-
V, 120-A FETs, from Fairchild, part number FDP032N08. These FETs have the following characteristics.
(83)
(84)
Calculate average FET COSS (COSS_QE_AVG) based on the data sheet parameters for COSS (COSS_SPEC), and drain
to source voltage where COSS_SPEC was measured (Vds_spec), and the maximum drain to source voltage in the
design (VdsQE) that will be applied to the FET in the application.
Voltage across FET QE and QF when they are off:
(85)
Voltage where FET COSS is specified and tested in the FET data sheet:
(86)
Specified output capacitance from FET data sheet:
(87)
Average QE and QF COSS [2]:
(88)
QE and QF RMS current:
(89)
46
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