鈩?/div>
Cold
2.2M
7.5k
33k
0.01
1N4687
6.8k
*
T1
T2
1N5824
2200/10V
+
L1
+
5.0V/3.0A
3/200
Vac
1N4001
+
47/25V
10
VCC
+
-
Comp
+
-
Vref
DT
+
Vout
5.0k
Pout
25k
0.01
1.5k
10
27k
11k
2.7k
Results
20 mV 0.40%
52 mV 0.26%
476 mV 9.5%
300 mV 2.5%
45 mV p鈥損 P.A.R.D.
75 mV p鈥損 P.A.R.D.
74%
4
CT
5
0.001
6
200
47k
E
Gnd
RT
8
7
C
100/10V
L2
1N4934
+
1N4934
+
1000/25V
1000/25V
+
12/075A
+
Common
+
10/35V
-12/0.75A
22k
180/200V
10/35V
L3
1
2
3
14
13
12
8.2k
9
1N4937
1N4934
115 Vac
鹵
20%
MC34060A
MPS
A05
10/25V
+
MPS
A55
MJE
13005
MC34060A, MC33060A
http://onsemi.com
13
*Optional R.F.I. Filter
47
1.0
1N4148
Test
Line Regulation 5.0 V
Line Regulation
鹵
12 V
Load Regulation 5.0 V
Load Regulation
鹵
12 V
Output Ripple 5.0 V
Output Ripple
鹵
12 V
Efficiency
Conditions
V in = 95 Vac to 135 Vac, IO = 3.0 A
V in = 95 Vac to 135 Vac, IO =
鹵0.75
A
V in = 115 Vac, IO = 1.0 A to 4.0 A
V in = 115 Vac, IO =
鹵0.4
A to
鹵0.9
A
V in = 115 Vac, IO = 3.0 A
V in = 115 Vac, IO =
鹵0.75
A
V in = 115 Vac, IO 5.0 V = 3.0 A
IO
鹵12
V =
鹵0.75
A
T1 鈥?Coilcraft W2961
T2 鈥?Core: Coilcraft 11鈥?64鈥?6,
0.025
鈥?/div>
gap in each leg.
Bobbin: Coilcraft 37鈥?73
Windings:
Primary, 2 each, 75 turns #25 Awg Bifilar wound
Feedback: 15 turns #26 Awg
Secondary, 5.0 V, 6 turns @33 Awg Bifilar wound
Secondary, 2 each, 14 turns #24 Awg Bifilar wound
L1 鈥?Coilcraft Z7156, 15
碌
H @ 5.0 A
L2, L3 鈥?Coilcraft Z7157, 25
碌
H @ 1.0 A
Figure 22. 33 W Off鈥揕ine Flyback Converter with Soft鈥揝tart and Primary Power Limiting
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