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U2008B Datasheet(PDF) 2 Page - ATMEL Corporation

Part # U2008B
Description  Low-cost Phase-control IC with Soft Start
PDF  13 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

U2008B Datasheet(HTML) 2 Page - ATMEL Corporation

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2
4712C–AUTO–07/07
U2008B
Figure 1-2.
Block Diagram with Typical Circuit: Soft Start
Automatic
retriggering
Limiting
detector
Current
detector
Full wave load
current detector
Soft start
Voltage
detector
7
Phase
control unit
ϕ = f(V
3)
6
Mains voltage
compensation
Supply
voltage
limiting
Reference
voltage
Voltage
monitoring
23
5
4
1
8
R
2
680 k
Ω
22 k
Ω/2W
BYT51K
470 k
Ω
180
Ω
TIC
226
Load
68 k
Ω
Set point
100 nF
10 nF
230 V ~
50 k
Ω
220 k
Ω
GND
100 µF
25V
+
-
L
Soft start
4.7 µF/25V
N
U2008B
R
1
D
1
R
8
-V
S
C
1
P
1
R
7
R
10
C
4
C
3
C
5
R
3
α
max



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