APW7137
Typical Application Circuits
Fig 1. Typical 5V to 12V Supply
VIN
VOUT
12V
L1
10mH
5V
C1
5
2
1
3
C2
4.7mF
VIN
LX
FB
4.7mF
R1
1.2MW
GND
APW7137
EN
ON
4
OFF
R2
137kW
Fig 2. Standard 3.3V to 5V Supply
VIN
VOUT
5V
L1
4.7mH
3.3V
C1
4.7mF
5
2
1
3
C2
10mF
VIN
LX
FB
R1
430kW
GND
APW7137
EN
ON
4
OFF
R2
140kW
Fig 3. Brightness control using a PWM signal apply to EN
L1
VIN
VOUT
22mH
C1
4.7mF
5
2
1
3
C2
1mF
VIN
LX
FB
Up to 8
WLEDs
GND
100Hz~300Hz
APW7137
EN
4
Duty=100%, ILED=20mA
Duty=0%, LED off
R1
62W
Fig 4. Multiple Output for TFT-LCD Power Supply
C5
C9
+13V
C6
0.47mF
0.1mF
0.1mF
-8V
C3
C7
C10
0.47mF
+9V
C4
0.47mF
0.1mF
0.1mF
-4V
C8
0.47mF
VOUT
5V
VIN
L1
4.7µH
C1
4.7mF
5
2
1
3
C2
10mF
VIN
LX
R1
430kW
GND
EN
APW7137
ON
4
FB
OFF
R2
140kW
Copyright ã ANPEC Electronics Corp.
11
www.anpec.com.tw
Rev. A.4 - Oct., 2008
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
