NCP1246 ONSEMI [ON Semiconductor], NCP1246 Datasheet - Page 12

• Manufacturer Part Number: NCP1246
• Description: Fixed Frequency Current Mode Controller for Flyback Converters
• Manufacturer: ONSEMI [ON Semiconductor]

2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.85
1.80
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
ï50
ï50
ï50
Figure 31. FB Pin Level V
Which is the Overpower Compensation
ï25
ï25
Figure 29. FB Pin SkipïIn Level V
ï25
Figure 27. FB Pin Voltage Below Which
Frequency Foldback Starts V
0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
25
Applied
50
50
50
FB(OPCF)
75
75
75
TYPICAL CHARACTERISTIC
FB(foldS)
Above
skip(in)
100
100
100
http://onsemi.com
NCP1246
125
125
125
12
1.00
0.98
0.96
0.94
0.92
0.90
0.88
0.86
0.84
0.82
0.80
0.88
0.86
0.84
0.82
0.80
0.78
0.76
0.74
0.72
2.40
2.35
2.30
2.25
2.20
2.15
2.10
2.05
2.00
1.95
1.90
ï50
ï50
ï50
Figure 30. FB Pin SkipïOut Level V
Frequency Foldback Complete V
ï25
Figure 28. FB Pin Voltage Below Which
ï25
Figure 32. FB Pin Level V
ï25
Which is No Overpower Compensation
0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
25
Applied
50
50
50
FB(OPCE)
75
75
75
FB(foldE)
skip(out)
Below
100
100
100
125
125
125