NCP1234 ONSEMI [ON Semiconductor], NCP1234 Datasheet - Page 10

• Manufacturer Part Number: NCP1234
• Description: Fixed Frequency Current Mode Controller for Flyback Converters
• Manufacturer: ONSEMI [ON Semiconductor]

0.77
0.75
0.73
0.71
0.69
0.67
0.65
0.63
2.60
2.55
2.50
2.45
2.40
2.35
2.30
2.25
2.20
2.15
2.10
30
29
28
27
26
25
24
23
22
21
20
−50
−50
−50
Figure 17. Minimum Switching Frequency
Figure 19. FB Pin Level V
Figure 15. FB Pin Skip−in Level V
Which is the Overpower Compensation
−25
−25
−25
0
0
0
TEMPERATURE (C)
TEMPERATURE (C)
TEMPERATURE (C)
f
25
25
25
OSC(min)
Applied
TYPICAL PERFORMANCE CHARACTERISTICS
50
50
50
FB(OPCF)
75
75
75
skip(in)
Above
100
100
100
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125
125
125
10
2.40
2.35
2.30
2.25
2.20
2.15
2.10
2.05
2.00
1.95
1.90
0.88
0.86
0.84
0.82
0.80
0.78
0.76
0.74
0.72
150
145
140
135
130
125
120
115
110
−50
−50
−50
Compensating Current I
Figure 16. FB Pin Skip−Out Level V
Figure 20. FB Pin Level V
Which is No Overpower Compensation
−25
−25
−25
Figure 18. Maximum Overpower
0
0
0
TEMPERATURE (C)
TEMPERATURE (C)
TEMPERATURE (C)
of CS Pin
25
25
25
Applied
OPC(365)
50
50
50
FB(OPCE)
75
75
75
Flowing Out
skip(out)
Below
100
100
100
125
125
125