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APW7071(2008) 데이터 시트보기 (PDF) - Anpec Electronics
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APW7071
(Rev.:2008)
Step-Up Converter for 4 Series White LEDs Driver
Anpec Electronics
APW7071 Datasheet PDF : 15 Pages
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APW7071
Operating Waveforms
(Circuit
of
Figure
1,
V
IN
=
3.3V,
I
LED
=
20mA,
L1
=
4.7
µ
H,
C
IN
=
4.7
µ
F,
C
OUT
=
0.1
µ
F,4
LEDs,
T
A
=
+25
°
C,
unless
otherwise
noted.)
Start-up Waveform
OVP Waveform
V
SHDN
1
V
OUT
V
OUT
1
2
I
IN
3
CH1: V
SHDN
, 2V/Div, DC
CH2: V
OUT
, 5V/Div, DC
CH3: I
IN
, 100mA/Div, DC
Time: 1ms/Div
CH1: V
OUT
, 5V/Div, DC
Time: 20ms/Div
PFM Operation
1
Pulse Burst Operation
1
2
2
3
CH1: V
OUT
, 200mV/Div, AC
CH2: V
SW
, 10V/Div, DC
CH3: V
FB
, 100mA/Div, DC
Time: 1
µ
s/Div
3
CH1: V
OUT
, 200mV/Div, AC
CH2: V
SW
, 10V/Div, DC
CH3: V
FB
, 100mA/Div, DC
Time: 2
µ
s/Div
Copyright
©
ANPEC Electronics Corp.
5
Rev. A.3 - Jul., 2008
www.anpec.com.tw
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