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SC4539
Typical Characteristics (continued)
PWM Operation at 200Hz and 1% Duty Cycle
V LX (20V/div)
I OUT (20mA/div)
V OUT (10V/div)
V EN (2V/div)
2ms/div
PWM Operation at 32kHz and 50% Duty Cycle
V LX (20V/div)
PWM Operation at 50kHz and 15% Duty Cycle
V LX (20V/div)
I OUT (20mA/div)
V OUT (20V/div)
V EN (2V/div)
4μs/div
PWM Operation at 32kHz and 10% Duty Cycle
V LX (20V/div)
I OUT (20mA/div)
I OUT (20mA/div)
V OUT (20V/div)
V EN (2V/div)
100
80
10μs/div
I BL vs. Duty Cycle
V OUT (20V/div)
V EN (2V/div)
10μs/div
I BL Error vs. PWM Frequency at 50% Duty Cycle
6.0
4.0
2.0
60
0.0
40
20
200Hz
50kHz
-2.0
-4.0
0
32kHz
-6.0
0
20
40
60
80
100
0.1
1
10
100
PWM Duty Cycle (%)
PWM Frequency (kHz)
6
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