NCP1234 查看數據表（PDF） - ON Semiconductor
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NCP1234 Datasheet PDF : 33 Pages
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NCP1234
TYPICAL PERFORMANCE CHARACTERISTICS
0.77
0.75
0.73
0.71
0.69
0.67
0.65
0.63
−50 −25 0
25 50 75 100
TEMPERATURE (C)
Figure 15. 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
125
−50 −25
0
25 50 75
TEMPERATURE (C)
100 125
Figure 16. FB Pin Skip−Out Level Vskip(out)
30
150
29
145
28
140
27
26
135
25
130
24
125
23
120
22
21
115
20
−50 −25 0
110
25 50 75 100 125
−50 −25 0
25 50 75 100 125
TEMPERATURE (C)
TEMPERATURE (C)
Figure 17. Minimum Switching Frequency
fOSC(min)
Figure 18. Maximum Overpower
Compensating Current IOPC(365) Flowing Out
of CS Pin
2.60
2.40
2.55
2.35
2.50
2.30
2.45
2.25
2.40
2.20
2.35
2.15
2.30
2.10
2.25
2.05
2.20
2.00
2.15
1.95
2.10
−50 −25
0
25 50 75
TEMPERATURE (C)
1.90
100 125
−50 −25
0
25
50
75
TEMPERATURE (C)
100 125
Figure 19. FB Pin Level VFB(OPCF) Above
Which is the Overpower Compensation
Applied
Figure 20. FB Pin Level VFB(OPCE) Below
Which is No Overpower Compensation
Applied
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