NCP1212 ON Semiconductor, NCP1212 Datasheet - Page 10

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

−0.5
3.5
2.5
1.5
0.5
4
3
2
1
0
0
Figure 27. Rise Time of Gate Drive Waveform
Figure 29. Supply Current vs. Supply Voltage
(Duty Cycle = 82% and Output Load = 1 nF)
Ramp up to 24 V
Ramp down from 24 V
5
V
CC
, SUPPLY VOLTAGE (V)
(C
10
L
= 1 nF)
300
250
200
150
100
Figure 31. Switch Frequency vs. C
50
0
400
15
20
600
C
T
http://onsemi.com
, PIN CAPACITANCE (pF)
NCP1212
25
10
800
−0.5
3.5
2.5
1.5
0.5
3
2
1
0
4
0
48% DUTY −CYCLE
82% DUTY CYCLE
T
Figure 30. Supply Current vs. Supply Voltage
Figure 28. Fall Time of Gate Drive Waveform
(Duty Cycle = 48% and Output Load = 1 nF)
Pin Capacitance
1000
Ramp up to 24 V
Ramp down from 24 V
5
V
CC
, SUPPLY VOLTAGE (V)
1200
10
(C
L
= 1 nF)
15
20
25