APW7136B(2010) 查看數據表（PDF） - Anpec Electronics
零件编号
产品描述 (功能)
生产厂家
APW7136B Datasheet PDF : 17 Pages
| |||
APW7136A/B/C
Typical Application Circuits
VIN
C1
4.7µF
OFF ON
L1
22µH
6 VIN LX 1
2 GND OVP 5
APW7136
4 EN
FB 3
VOUT
VIN
L1
22µH
C1
C2
1µF Up to 8
4.7µF
6 VIN
LX 1
WLEDs
2 GND OVP 5
100Hz~100kHz
APW7136
4 EN
FB 3
R1
12Ω
Duty=100%, ILED=20mA
Duty=0%, LED off
VOUT
C2
1µF Up to 8
WLEDs
R1
12Ω
Figure 1. Typical 8 WLEDs Application
Figure 2. Brightness Control Using a PWM Signal
Applies to EN
VIN
L1
22µH
VOUT
C1
4.7µF
6 VIN
LX 1
2
GND
OVP 5
OFF ON
APW7136
4
EN
FB 3
R3
PWM
3.3V
0V
120k
VADJ
brightness
R4
control Duty=100%, LED off
10k
Duty=0%, ILED=20mA
C2
1µF
R2
10k
C3
0.1µF
Up to 8
WLEDs
R1
12Ω
R2
=
VREF
⋅
VADJ,MAX
ILED ,MAX ⋅ R3 + VADJ,MIN
⋅ILED ,MAX + VREF ⋅ILED ,MIN
− ILED ,MIN ⋅ R3 − VADJ,MAX
− VADJ,MIN ⋅ ILED ,MIN − VREF
⋅ ILED ,MAX
R1 =
VREF
⋅ 1 +
R2
R3
−
R2
R3
⋅ V ADJ
,MIN
ILED ,MAX
Figure 3. Brightness Control Using a Filtered PWM Signal
VIN
4.5V~6V
C1
10µF
OFF ON
L1
10µH
6 VIN
LX 1
2
GND
OVP 5
4
APW7136
EN
FB
3
C2
10µF
VOUT
9 Strings
total
R1
1.4Ω
0603
Figure 4. Circuit for Driving 27 WLEDs
Copyright © ANPEC Electronics Corp.
9
Rev. A.4 - Dec., 2010
www.anpec.com.tw
Share Link: 