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參數資料
| 型號： | MC34129P |
| 廠商： | MOTOROLA INC |
| 元件分類： | 穩壓器 |
| 英文描述： | HIGH PERFORMANCE CURRENT MODE CONTROLLERS |
| 中文描述： | 1 A SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDIP14 |
| 封裝： | PLASTIC, DIP-14 |
| 文件頁數： | 15/16頁 |
| 文件大小： | 347K |
| 代理商： | MC34129P |
MC34129 MC33129
15
MOTOROLA ANALOG IC DEVICE DATA
Figure 30. Isolated 3.0 W Flyback Regulator with Secondary Side Sensing
T1:
L1:
Primary = 22T #18 AWG
Secondary = 22T #18 AWG
Lp = 50
μ
H
Core = Ferroxcube
2616PA100–3C8
Bobbin = Ferroxcube 2616F1D
Coilcraft Z7156, 15
μ
H
12
0.1
7
6
5
4
2.5V
OSC
R
S
Q
1.25V
13
14
8
9
10
11
1
2
3
Vin = 12V
D
G
M
K
S
1N5821
L1
5/60mA
470
1/2
4N26
51
100
0.1
Return
TL431A
MTP10N10M
1/2
4N26
+
–
+
–
+
–
+
–
+
–
2
1
5
0
+
+
3
3
2
0
100
Test
Conditions
Results
Line Regulation
Vin = 8.0 V to 12 V, Iout 600 mA
Vin = 12 V, Iout = 100 mA to 600 mA
Vin = 12 V, Iout = 600 mA
Vin = 12 V, Iout = 600 mA
= 1.0 mV
Load Regulation
= 8.0 mV
Output Ripple
20 mVpp
Efficiency
81%
An economical method of achieving secondary sensing is to combine the TL431A with a 4N26 optocoupler.
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