NCP1247 Datasheet, PDF (13/42 Pages) ON Semiconductor – Fixed Frequency Current Mode Controller for Flyback Converters

NCP1247
TYPICAL CHARACTERISTIC
13.0
12.8
12.6
12.4
12.2
12.0
11.8
11.6
11.4
11.2
11.0
−50 −25
0 25 50 75 100 125
TEMPERATURE (°C)
Figure 33. V_CC Turn−on Threshold Level, V_CC
Going Up HV Current Source Stop Threshold
V_CC(on)
9.4
9.2
9.0
8.8
8.6
8.4
8.2
8.0
−50 −25
0 25 50 75 100 125
TEMPERATURE (°C)
Figure 35. V_CC Turn−off Threshold (UVLO)
V_CC(off)
2.0
1.9
I_CC1(100kHz)
1.9
I_CC1(65kHz)
1.8
1.8
1.7
1.7
−50 −25
0 25 50 75 100 125
TEMPERATURE (°C)
Figure 37. Internal Current Consumption when
DRV Pin is Unloaded
11.5
11.3
11.1
10.9
10.7
10.5
10.3
10.1
9.9
9.7
9.5
−50
−25
0
25
50
75 100 125
TEMPERATURE (°C)
Figure 34. HV Current Source Restart
Threshold V_CC(min)
7.3
7.2
7.1
7.0
6.9
6.8
6.7
6.6
6.5
6.4
−50 −25
0
25
50
75 100 125
TEMPERATURE (°C)
Figure 36. V_CC Decreasing Level at Which the
Internal Logic Resets V_CC(reset)
3.2
I_CC2(100kHz)
3.0
2.8
2.6
I_CC2(65kHz)
2.4
2.2
2.0
−50 −25
0
25
50
75 100 125
TEMPERATURE (°C)
Figure 38. Internal Current Consumption when
DRV Pin is Loaded by 1 nF
http://onsemi.com
13