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APW7136ACITRG Datasheet(PDF) 9 Page - Anpec Electronics Coropration

Part # APW7136ACITRG
Description  1MHz, High-Efficiency, Step-Up Converter for 2 to 8 White LEDs
PDF  17 Pages
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Manufacturer  ANPEC [Anpec Electronics Coropration]
Direct Link  http://www.anpec.com.tw
Logo ANPEC - Anpec Electronics Coropration

APW7136ACITRG Datasheet(HTML) 9 Page - Anpec Electronics Coropration

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Copyright
© ANPEC Electronics Corp.
Rev. A.4 - Dec., 2010
APW7136A/B/C
www.anpec.com.tw
9
Typical Application Circuits
GND
VIN
V
OUT
EN
LX
FB
OVP
4
6
5
3
2
1
L1
10
µH
C2
10
µF
C1
10
µF
R1
1.4
Ω
0603
V
IN
4.5V~6V
9 Strings
total
OFF ON
Figure 4. Circuit for Driving 27 WLEDs
APW7136
GND
VIN
V
OUT
EN
LX
FB
OVP
4
6
5
3
2
1
L1
22
µH
C2
1
µF
C1
4.7
µF
R1
12
Ω
V
IN
Up to 8
WLEDs
OFF ON
Figure 1. Typical 8 WLEDs Application
APW7136
GND
VIN
V
OUT
EN
LX
FB
OVP
4
6
5
3
2
1
L1
22
µH
C2
1
µF
C1
4.7
µF
R1
12
Ω
V
IN
Up to 8
WLEDs
Figure 2. Brightness Control Using a PWM Signal
Applies to EN
100Hz~100kHz
Duty=100%, I
LED=20mA
Duty=0%, LED off
APW7136
GND
VIN
V
OUT
EN
LX
FB
OVP
4
6
5
3
2
1
L1
22
µH
C2
1
µF
C1
4.7
µF
R1
12
Ω
R2
10k
R3
120k
C3
0.1
µF
R4
10k
V
IN
PWM
brightness
control Duty=100%, LED off
Duty=0%, I
LED=20mA
3.3V
0V
Up to 8
WLEDs
Figure 3. Brightness Control Using a Filtered PWM Signal
OFF ON
APW7136
MAX
,
LED
REF
MIN
,
LED
MIN
,
ADJ
MIN
,
LED
REF
MAX
,
LED
MAX
,
ADJ
MAX
,
ADJ
MIN
,
LED
MIN
,
ADJ
MAX
,
LED
REF
I
V
I
V
I
V
I
V
V
3
R
I
V
3
R
I
V
2
R
⋅
−
⋅
−
⋅
+
⋅
−
⋅
−
+
⋅
⋅
=
MAX
,
LED
MIN
,
ADJ
REF
I
V
3
R
2
R
3
R
2
R
1
V
1
R
⋅
−
 +
⋅
=
V
ADJ



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