L4981A - L4981B
Figure 16:
Programmable Under Voltage Lock-
out Thresholds
Figure 17:
Modulation Frequency Normalized in
an Half Cycle of the Mains Voltage
1
Vl
fsw
1
0.8
0.8
R22 = R23
鈰?/div>
6.8
0.4
0.4
0.2
0.2
0
R23 (Kohm)
0
45
90
0
135
180
Electrical degrees
Table 1:
Programmable Under Voltage Lockout Thresholds.
V
CC ON
11V
12V
13V
14V
14.5V
15V
V
CC OFF
10V
10.1V
10.5V
10.8V
10.9V
11V
R22
82k鈩?/div>
220k
鈩?/div>
430k鈩?/div>
909k
鈩?/div>
1.36M鈩?/div>
2.7M
鈩?/div>
R23
12k鈩?/div>
33k
鈩?/div>
62k鈩?/div>
133k
鈩?/div>
200k鈩?/div>
390k
鈩?/div>
Figure 18:
Oscillator Diagram
11/17
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