RT4533/A
Typical Application Circuit
L
10µH to 22µH
D
V
OUT
1
LX
VOUT
RT4533/A
5
3
6
VIN
V
IN
C
OUT
CIN
4.7µF
1µF / 50V
4
2
Enable
EN
GND
10 WLEDs
FB
R
SET
Timing Diagram
Period1
Period2
5kHz < F
< 100kHz
T
> 20ms
SHDN
PWM
EN
on-time1
on-time2
Duty1 x 200mV
Duty1 x 300mV
Duty2 x 200mV
Duty2 x 300mV
FB
Duty1 : on-time1/Period1
Duty2 : on-time2/Period2
Copyright 2015 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS4533/A-02 September 2015
www.richtek.com
6