TPS61040
TPS61041
SLVS413 – FEBRUARY 2002
D1
L1
10 µH
MBRM120L
†
C2
D2
24 V
V
CC
= 2.7 V to 6 V
100 nF
V
IN
SW
(Optional)
FB
C1
4.7 µF
R1
EN
GND
120 kΩ
R
110 Ω
S
L1:
D1:
C1:
C2:
Murata LQH4C3R3M04
Motorola MBR0530
Tayo Yuden JMK212BY475MG
Standard Ceramic Capacitor
Analog Brightness Control
3.3 V Led Off
R2 160 kΩ
0 V Iled = 20 mA
†
A smaller output capacitor value for C2 will cause a larger LED ripple
Figure 23. White LED Supply With Adjustable Brightness Control
Using an Analog Signal on the Feedback Pin
18
www.ti.com
ETC [ ETC ]
