UCC28720_15 Datasheet, PDF (7/33 Pages) Texas Instruments – UCC28720 Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

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Typical Characteristics (continued)
VDD = 25 V, unless otherwise noted.
700
690
680
670
660
650
640
630
620
610
600
-50 -25
0
25
50
75 100 125
Junction Temperature (°C)
C007
Figure 7. Minimum Switching Frequency vs. Junction
Temperature
40
35
V_VS = 3.7 V
30
25
20
15
V_VS = 4.35 V
10
-50 -25
0
25
50
75 100 125
Junction Temperature (°C)
C008
Figure 9. Driver Output Source Current vs. Junction
Temperature
4.68
4.66
4.64
4.62
4.6
4.58
4.56
4.54
-50 -25
0
25
50
75 100 125
Junction Temperature (°C)
C010
Figure 11. Over Voltage Protection Threshold vs. Junction
Temperature
UCC28720
SLUSBE8B – MAY 2013 – REVISED SEPTEMBER 2015
85
84
83
82
81
80
79
78
77
76
75
-50 -25
0
25
50
75 100 125
Junction Temperature (°C)
C012
Figure 8. Maximum Switching Frequency vs. Junction
Temperature
1.6
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6
-50 -25
0
25
50
75 100 125
Junction Temperature (°C)
C009
Figure 10. Driver Pull Down Resistance vs. Junction
Temperature
227
226
225
224
223
222
221
220
219
-50 -25
0
25
50
75 100 125
Junction Temperature (°C)
C011
Figure 12. HV Charging Current vs. Junction Temperature
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