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MIC4043 Datasheet(PDF) 7 Page - Micrel Semiconductor

Part # MIC4043
Description  Low-Voltage Secondary-Side Shunt Regulator
PDF  12 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC4043 Datasheet(HTML) 7 Page - Micrel Semiconductor

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May 2000
7
MIC4043
MIC4043
Micrel
Off-Line 1.8V/2A Power Supply
R13
10
Ω 1%
C11
1200µF
10V
R14
200
Ω
1%
VOUT
+1.8V/2A
D4
12CTQ045
L2
5µH
C12
220µF
10V
C13
1000pF
50/63V
U2b
2501
U3
MIC4043
R10
72k
1%
R11
33k
1%
R15
47.5k
1%
U1
MIC38HC43BN
VDD
VREF
GND
COMP
VOUT
RT/CT
FB
ISNS
2
1
4
3
8
5
7
6
R2
332k
1%
R3
332k
1%
D1
1N4448
R4
34
Ω
1%
C5
0.1µF
50/
63V
D2
18V
C7
470pF
63V
C6
470pF
63V
Q1
IRFIBE30G
L1
R5
1.21k 1%
R6
1.21k
1%
BR1
DBR1
C4
47µF
400V
U2a
2501
F1
85 to 264Vac
50/60Hz
Hot
Neutral
Return
T1
1
2
7
6
4
3
1A
Ground
C14
3000pF
50V
R8
1.9
Ω
1/4W
1%
R9
470
Ω
1/2W
D3
UF4005
C9
100pF
1kV
R1
1k 1%
R7
14k 1%
C3
2200pF
400V
C2
2200pF
400V
C1
0.1µF
250V
C10
0.1µF
50/63V
80T
3T
20mH
C8
22µF
25V
10T
FB
GND
SNK
IN
R12
90
Ω
V
1.245V
R2
R1
1
TRIP =+


Figure 3. Off-Line 1.8V/2A Power Supply
Figure 3a. 1.8V/1A Bode Plot
(θ margin = 69°)
Figure 3b. 1.8V/2A Bode Plot
(θ margin = 79°)



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