NCP1234 ONSEMI [ON Semiconductor], NCP1234 Datasheet - Page 11

• Manufacturer Part Number: NCP1234
• Description: Fixed Frequency Current Mode Controller for Flyback Converters
• Manufacturer: ONSEMI [ON Semiconductor]

110
105
100
1.34
1.32
1.30
1.28
1.26
1.24
1.22
1.20
1.18
95
90
85
80
75
70
2.65
2.60
2.55
2.50
2.45
2.40
2.35
−50
−50
−50
Latch Pin, Allowing Direct NTC Connection
Figure 25. Current I
Figure 23. Latch Pin Open Voltage V
Figure 21. Latch Pin High Threshold V
−25
−25
−25
0
TEMPERATURE (C)
0
0
TEMPERATURE (C)
TEMPERATURE (C)
25
25
25
NTC
TYPICAL PERFORMANCE CHARACTERISTICS
50
Sourced from the
50
50
75
75
75
100
clamp0
100
100
http://onsemi.com
OVP
125
125
125
11
0.85
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
2.80
2.70
2.60
2.50
2.40
2.30
2.20
2.10
2.00
220
210
200
190
180
170
160
150
140
−50
−50
−50
Figure 24. Latch Pin Voltage V
Figure 26. Current I
Figure 22. Latch Pin Low Threshold V
−25
−25
−25
the Latch Pin, During Soft−Start
0
0
0
Pin is Sinking 1 mA)
TEMPERATURE (C)
TEMPERATURE (C)
TEMPERATURE (C)
25
25
25
NTC(SSTART)
50
50
50
clamp1
Sourced from
75
75
75
(Latch−off
100
100
100
OTP
125
125
125