NCP1236 Ver la hoja de datos (PDF) - ON Semiconductor
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NCP1236 Datasheet PDF : 34 Pages
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NCP1236
TYPICAL PERFORMANCE CHARACTERISTICS
85
2.20
84
2.15
83
2.10
82
81
2.05
80
2.00
79
1.95
78
1.90
77
76
1.85
75
−50 −25 0
1.80
25 50 75 100 125
−50 −25 0
25 50 75 100 125
TEMPERATURE (C)
TEMPERATURE (C)
Figure 15. Maximum Duty Cycle DMAX
Figure 16. FB Pin Voltage Below Which
Frequency Foldback Starts VFB(foldS)
1.50
0.77
1.45
0.75
0.73
1.40
0.71
1.35
0.69
1.30
0.67
1.25
0.65
1.20
−50 −25 0
0.63
25 50 75 100 125
−50 −25 0
25 50 75 100 125
TEMPERATURE (C)
TEMPERATURE (C)
Figure 17. FB Pin Voltage Below Which
Frequency Foldback is Complete VFB(foldE)
Figure 18. FB Pin Skip−in Level Vskip(in)
0.88
0.86
0.84
0.82
0.80
0.78
0.76
0.74
0.72
−50 −25
0
25 50 75
TEMPERATURE (C)
100 125
Figure 19. FB Pin Skip−Out Level Vskip(out)
30
29
28
27
26
25
24
23
22
21
20
−50 −25 0
25 50 75 100 125
TEMPERATURE (C)
Figure 20. Minimum Switching Frequency
fOSC(min)
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