mic4043bm4 Micrel Semiconductor, mic4043bm4 Datasheet - Page 9

• Manufacturer Part Number: mic4043bm4
• Description: Mic4043 Low-voltage Secondary-side Shunt Regulator
• Manufacturer: Micrel Semiconductor

Off-Line 3.3V/2A Power Supply
November 2000
MIC4043
470pF
14k 1%
85 to 264Vac
Figure 5a. 3.3V/1A Bode Plot
63V
R7
50/60Hz
Ground
Neutral
C6
Hot
R6
1.21k
1%
1.21k 1%
R5
U2a
2501
C7
470pF
63V
1
2
3
4
margin = 82 )
MIC38HC43BN
COMP
FB
I
R
SNS
1A
F1
T
/C
1k 1%
50/63V
T
U1
0.1 F
R1
C10
GND
V
V
V
20mH
REF
OUT
2200pF
DD
L1
400V
8
7
6
5
C2
Figure 5. Off-Line 3.3V/2A Power Supply
R2
332k
1%
R3
332k
1%
10 1%
0.1 F
250V
R13
18V
C1
D2
C3
2200pF
400V
0.1 F
50/
63V
C5
IRFIBE30G
34
1%
R4
BR1
DBR1
1/4W
22 F
25V
Q1
1.9
C8
1%
47 F
400V
R8
9
C4
1N4448
D1
80T
10T
R9
470
1/2W
C9
100pF
1kV
1
2
4
3
249
T1
D3
UF4005
12CTQ045
7
3T
6
MIC4043
IN
GND
D4
2501
Figure 5b. 3.3V/2A Bode Plot
U2b
U3
SNK
1000pF
V
FB
TRIP
C11
1200 F
10V
1.245V
5 H
L2
margin = 80 )
R2
R1
C12
220 F
10V
R10
R11
72k
33k
1%
1%
1
R14
200
1%
+3.3V/2A
Return
V
OUT
MIC4043
Micrel