NCP1246 ONSEMI [ON Semiconductor], NCP1246 Datasheet - Page 14

• Manufacturer Part Number: NCP1246
• Description: Fixed Frequency Current Mode Controller for Flyback Converters
• Manufacturer: ONSEMI [ON Semiconductor]

150
145
140
135
130
125
120
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
2.6
2.6
2.5
2.5
2.4
2.4
2.3
2.3
2.2
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Figure 41. FB Pin Voltage Level Above Which
Hysteresis Observed at HV Pin V
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Figure 39. X2 Discharge Comparator
Figure 43. Fault Timer Duration t
is Entered On Mode V
0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
25
50
50
50
75
ON
75
75
TYPICAL CHARACTERISTIC
HV(hyst)
fault
100
100
100
http://onsemi.com
125
NCP1246
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14
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
0.45
0.44
0.43
0.42
0.41
0.40
0.39
0.38
0.37
0.36
0.35
300
280
260
240
220
200
180
160
140
120
100
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Figure 40. HV Signal Sampling Period T
Figure 42. FB Pin Voltage Level Below Which
Figure 44. Go To Off Mode Timer Duration
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is Entered Off Mode V
0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
25
t
GTOM
50
50
50
OFF
75
75
75
100
100
100
sample
125
125
125