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UCC28056CDBVT bảng dữ liệu(PDF) 30 Page - Texas Instruments

tên linh kiện UCC28056CDBVT
Giải thích chi tiết về linh kiện  UCC28056 6-Pin Single-Phase Transition-Mode PFC Controller
PDF  55 Pages
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nhà sản xuất  TI2 [Texas Instruments]
Trang chủ  https://www.ti.com
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UCC28056CDBVT bảng dữ liệu(HTML) 30 Page - Texas Instruments

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ZCOcp1Max
LSat
CS
V
I
8.8 A
R
:
:
:
CS
1
R
0.062
2
1
0.125
3
:
ZCOcp1Min
CS
LPk
V
R
0.06
I
LPk
LPk0
I
I
7.69 A
u
u
u
ZC
FF0Fall
ONMAX0
FF1
LPk1
BST
K
V
T
G
I
6.24 A
L
u
u
InRMSMin
ONMAX0
LPk0
BST
V
2
T
I
7.69 A
L
P
BST
L
200
H
u
u
u
P
u
u
2
ZC
FF0Fall
ONMAX0
FF1
BST1
OutMax
K
V
T
G
L
235
H
110%
2
P
2
30
UCC28056
SLUSD37E – OCTOBER 2017 – REVISED NOVEMBER 2019
www.ti.com
Product Folder Links: UCC28056
Submit Documentation Feedback
Copyright © 2017–2019, Texas Instruments Incorporated
Ensure that POutMax can be delivered from the lowest Line voltage for GFF1. Use Equation 17 to calculate the
required Boost inductor value .
(17)
Choose the lower of the two values calculated in Equation 16 and Equation 17 (LBST0 and LBST1). Using a smaller
inductance value compromises light load efficiency. A larger inductance value cannot deliver the required
maximum load power (POutMax) across the required range of Line voltage.
Choose a Boost inductor value of 200 µH, considering a tolerance of 10%. In order to deliver maximum load
power the inductor must be able to operate with a peak current that is greater than both ILPk0 and ILPk1
(18)
(19)
(20)
(21)
Use Equation 22 to calculate a current sense resistance that ensures the required peak inductor current (ILPk)
does not cause early termination of the TON period.
(22)
Achieve this amount of resistance by connecting three resistors in parallel.
(23)
Use Equation 24 to calculate an inductance value that allows a saturation current above the maximum Ocp1
current limit value.
(24)
Maximum current in the power components flows while delivering maximum load when supplied from minimum
Line voltage. In this condition, the UCC28056 controller always operates in transition mode (CrM). shows the
inductor current waveforms for ideal CrM operation.



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