SC4539 データシートの表示（PDF） - Semtech Corporation
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SC4539 Datasheet PDF : 14 Pages
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SC4539
Typical Characteristics (continued)
PWM Operation at 200Hz and 1% Duty Cycle
PWM Operation at 50kHz and 15% Duty Cycle
V (20V/div)
LX
I (20mA/div)
OUT
VOUT (10V/div)
V (2V/div)
EN
2ms/div
PWM Operation at 32kHz and 50% Duty Cycle
VLX (20V/div)
I (20mA/div)
OUT
V (20V/div)
OUT
V (2V/div)
EN
4μs/div
PWM Operation at 32kHz and 10% Duty Cycle
VLX (20V/div)
IOUT (20mA/div)
V (20V/div)
OUT
V (2V/div)
EN
10μs/div
IBL vs. Duty Cycle
100
80
60
40
200Hz
20
50kHz
32kHz
0
0
20
40
60
PWM Duty Cycle (%)
80
100
V (20V/div)
LX
I (20mA/div)
OUT
V (20V/div)
OUT
V (2V/div)
EN
10μs/div
IBL Error vs. PWM Frequency at 50% Duty Cycle
6.0
4.0
2.0
0.0
-2.0
-4.0
-6.0
0.1
1
10
100
PWM Frequency (kHz)
6
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