NCP1444 View Datasheet(PDF) - ON Semiconductor
Part Name
Description
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NCP1444 Datasheet PDF : 20 Pages
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NCP1442, NCP1443, NCP1444, NCP1445
125
100
TA = 85°C
75
TA = 25°C
50
1.276
1.275
1.274
1.273
1.272
1.271
VCC = 2.7 V
VCC = 30 V
VCC = 12 V
25
VCC = 12 V
0
−0.665 −0.67 −0.675 −0.68 −0.685 −0.69 −0.695
VNFB, NEGATIVE FEEDBACK VOLTAGE (V)
Figure 9. Switching Frequency versus
Negative Feedback Voltage
1.270
1.269
1.268
0 10 20 30 40 50 60 70 80
TA, AMBIENT TEMPERATURE (°C)
Figure 10. Feedback Reference Voltage versus
Temperature (NCP1442/4 Only)
−2.46
−2.47
−2.48
VCC = 12 V
VCC = 2.7 V
−2.49
VCC = 30 V
−2.50
0
20
40
60
80
TA, AMBIENT TEMPERATURE (°C)
Figure 11. Feedback Reference Voltage versus
Temperature (NCP1443/5 Only)
0.30
0.29
0.28
0.27
0.26
0.25
VCC = 2.7 V VCC = 12 V
0.24
0.23
VCC = 30 V
0.22
0.21
0.20
0
20
40
60
80
TA, AMBIENT TEMPERATURE (°C)
Figure 12. Error Amplifier Bias Current versus
Temperature (NCP1442/3 Only)
−8
VCC = 30 V
−9
12 V
−10
2.7 V
−11
−12
−13
−14
0
20
40
60
80
TA, AMBIENT TEMPERATURE (°C)
Figure 13. Error Amplifier Bias Current versus
Temperature (NCP1443/5 Only)
97.0
96.5
96.0
95.5
95.0
94.5
94.0
93.5
93.0
0
VCC = 2.7 V
VCC = 12 V
VCC = 30 V
20
40
60
80
TA, AMBIENT TEMPERATURE (°C)
Figure 14. Maximum Duty Cycle versus
Temperature
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