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SC4539 Datasheet(PDF) 7 Page - Semtech Corporation

Part # SC4539
Description  High Effi ciency Boost Converter for up to 6 LEDS
PDF  14 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC4539 Datasheet(HTML) 7 Page - Semtech Corporation

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7
Typical Characteristics (continued)
SC4539
Waveforms During Over-Voltage Protection
40μs/div
V
LX
(20V/div)
V
OUT
(5V/div)
V
EN
(5V/div)
Typical Waveforms at V
IN = 2.8V
Typical Waveforms at V
IN = 3.6V
Typical Waveforms at V
IN = 5.5V
Start-Up Response
1μs/div
V
LX
(20V/div)
V
IN
(50mV/div)
V
OUT
(50V/div)
1μs/div
V
LX
(20V/div)
V
IN
(50mV/div)
V
OUT
(50V/div)
1μs/div
V
LX
(20V/div)
V
IN
(50mV/div)
V
OUT
(50mV/div)
100μs/div
V
LX
(20V/div)
V
OUT
(10V/div)
I
OUT
(20mA/div)
V
EN
(2V/div)
Normalized I
BL vs. Input Voltage
-3.5
-2.3
-1.2
0.0
1.2
2.3
3.5
2.8
3.25
3.7
4.15
4.6
5.05
5.5
V
IN (V)



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