UCC28610
www.ti.com ......................................................................................................................................... SLUS888C–JANUARY 2009–REVISED SEPTEMBER 2009
TYPICAL CHARACTERISTICS (continued)
Unless otherwise stated: VDD = 12V, VGG = 12V, ZCD = 1 V, FB = 0 V, GND = 0 V, a 0.1-µF capacitor between VDD and
GND, a 0.1-µF capacitor between VGG and GND, RCL = 33.2 kΩ, RMOT = 380 kΩ, –40°C < TA < +125°C, TJ = TA
OSCILLATOR FREQUENCY
vs
FEEDBACK CURRENT
MINIMUM SWITCHING PERIOD
vs
TEMPERATURE
8.0
7.8
160
140
120
100
80
7.6
7.4
60
40
7.2
20
7.0
0
-40 -25 -10
5
20 35 50 65 80 95 110 125
8
50
I
100
150
200
250
300
T
– Ambient Temperature – °C
A
– Feedback Control Current – mA
FB
Figure 7.
Figure 8.
SWITCHING PERIOD DURING AMPLITUDE MODULALTION
PEAK DRV CURRENT
vs
FEEDBACK CURRENT
vs
AMBIENT TEMPERATURE
38
37
3.5
3.0
2.5
T
= –40°C
36
A
35
34
2.0
1.5
T
= 25°C
A
Ambient
Temperature
(°C)
33
32
1.0
0.5
–40
25
T
= 125°C
A
125
31
0.0
-40 -25 -10
5
20 35 50 65 80 95 110 125
0
50
100
150
200
250
300
I
- Feedback Current - mA
T
– Ambient Temperature – °C
FB
A
Figure 9.
Figure 10.
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