NCP1212 ON Semiconductor, NCP1212 Datasheet - Page 7

• Manufacturer Part Number: NCP1212
• Description: Current Mode Pwm Controller For Both Forward And Flyback Converters
• Manufacturer: ON Semiconductor

8.5
7.5
6.5
350
300
250
200
150
100
50
9
8
7
6
−25
5
4
3
2
1
0
−25
−25
Figure 13. Gate Drive Source Capability vs.
Voltage Threshold vs. Junction Temperature
Figure 9. Soft−Start Charge Current vs.
Figure 11. 82% Duty Cycle Selection Input
V
DRV
T
T
1
T
J
J
1
= 8V
1
, JUNCTION TEMPERATURE (°C)
J
, JUNCTION TEMPERATURE (°C)
, JUNCTION TEMPERATURE (°C)
Junction Temperature
Junction Temperature
27
27
27
53
53
53
V
80 ms Pulsed Load
120 Hz Rate
CC
V
DRV
= 15 V
79
79
79
= 5V
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NCP1212
105
105
105
7
400
350
300
250
200
150
100
1.2
1.1
0.9
0.8
0.7
35
30
25
20
15
10
50
5
0
−25
−25
−25
1
Figure 10. Overload Timing Discharge Current
Figure 14. Gate Drive Sink Capability vs.
V
Figure 12. Output Sink Resistance vs.
DRV
T
T
T
1
1
1
= 1V
J
J
J
, JUNCTION TEMPERATURE (°C)
, JUNCTION TEMPERATURE (°C)
, JUNCTION TEMPERATURE (°C)
vs. Junction Temperature
Junction Temperature
Junction Temperature
27
27
27
V
DRV
53
53
53
= 1V
V
80 ms Pulsed Load
120 Hz Rate
CC
V
DRV
= 15 V
79
79
79
= 5V
105
105
105