NCP1445 ONSEMI [ON Semiconductor], NCP1445 Datasheet - Page 7

• Manufacturer Part Number: NCP1445
• Description: 4.0 A 280 kHz/560 kHz Boost Regulators
• Manufacturer: ONSEMI [ON Semiconductor]

125
100
−10
−12
−13
−14
−11
−2.46
−2.47
−2.48
−2.49
−2.50
−8
−9
75
50
25
0
−0.665 −0.67
0
Figure 13. Error Amplifier Bias Current versus
0
Figure 11. Feedback Reference Voltage versus
Figure 9. Switching Frequency versus
V
NFB
Temperature (NCP1443/5 Only)
T
20
, NEGATIVE FEEDBACK VOLTAGE (V)
Temperature (NCP1443/5 Only)
A
Negative Feedback Voltage
T
, AMBIENT TEMPERATURE ( C)
20
A
−0.675
, AMBIENT TEMPERATURE ( C)
T
A
= 85 C
40
−0.68
V
40
CC
T
NCP1442, NCP1443, NCP1444, NCP1445
A
= 2.7 V
= 25 C
−0.685
60
V
CC
60
V
V
CC
CC
= 30 V
V
−0.69
CC
= 12 V
= 12 V
12 V
= 30 V
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2.7 V
80
−0.695
80
7
1.276
1.275
1.274
1.273
1.272
1.271
1.270
1.269
1.268
97.0
96.5
96.0
95.5
95.0
94.5
94.0
93.5
93.0
0.30
0.29
0.28
0.27
0.26
0.25
0.24
0.23
0.22
0.21
0.20
0
0
0
Figure 10. Feedback Reference Voltage versus
Figure 12. Error Amplifier Bias Current versus
V
V
CC
CC
10
Figure 14. Maximum Duty Cycle versus
= 2.7 V
V
= 2.7 V
CC
Temperature (NCP1442/4 Only)
T
T
Temperature (NCP1442/3 Only)
T
= 30 V
A
20
A
20
20
A
, AMBIENT TEMPERATURE ( C)
, AMBIENT TEMPERATURE ( C)
, AMBIENT TEMPERATURE ( C)
V
CC
30
= 12 V
Temperature
V
40
CC
40
40
= 2.7 V
V
V
50
CC
CC
V
CC
= 30 V
= 12 V
60
60
60
= 30 V
V
CC
70
= 12 V
80
80
80