L6668 Просмотр технического описания (PDF) - STMicroelectronics
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производитель
L6668 Datasheet PDF : 23 Pages
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Figure 17. Oscillator frequency vs. Tj
fsw
102%
101.5%
RT = 13.3 kΩ
CT = 1 nF
Vcc = 22V
101%
100.5%
100%
Vcc = 15V
Vcc = 9.4V
99.5%
Values normalized to sfw @ Tj=25°C, Vcc=15V
99%
-50
0
50
Tj (°C)
100
150
Figure 18. Oscillator ramp vs. Tj
Vpin14
(V) 3.5
3.0
Peak
2.5
Vcc = 15 V
2.0
1.5
Valley
1.0
0.5
-50
0
50
100
150
Tj (°C)
Figure 19. Current sense clamp vs. Tj
V ISENx (pin 12)
(V) 1
0.9
Vcc = 15 V
VCOMP= Upper clamp
0.8
0.7
0.6
-50
0
50
100
150
Tj (°C)
L6668
Figure 20. Disable level on current sense vs. Tj
Vpin12
(V) 2.0
Vcc = 15 V
1.8
1.6
1.4
1.2
1.0
-50
0
50
100
150
Tj (°C)
Figure 21. Reference voltage vs. Tj
VREF (pin 8)
(V) 5.1
5.05
Vcc = 15 V
5
4.95
4.9
-50
0
50
100
150
Tj (°C)
Figure 22. PFC_STOP open/low thresholds on
VCOMP vs. Tj
VCOMP (pin 10)
(V) 2.8
PFC_STOP low (voltage rising)
2.7
2.6
Vcc = 15 V
2.5
2.4
2.3
PFC_STOP open (voltage falling)
2.2
2.1
-50
0
50
100
150
Tj (°C)
9/23
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