RT9385
Typical Operating Characteristics
LED Current vs. Input Voltage
Efficiency vs. Input Voltage
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
100
90
80
70
60
50
40
30
20
LED1
LED2
LED3
LED4
LED5
10
LED VF = 3.02V
LED VF = 3.02V
0
2.8
3
3.2 3.4 3.6 3.8
4
4.2 4.4 4.6 4.8
5
2.8
3
3.2 3.4 3.6 3.8
4
4.2 4.4 4.6 4.8
5
Input Voltage (V)
Input Voltage (V)
x1 Mode Quiescent Current vs. Input Voltage
1.30
x2 Mode Quiescent Current vs. Input Voltage
4.5
1.25
1.20
1.15
1.10
1.05
1.00
4.0
3.5
3.0
2.5
2.0
2.8
3
3.2 3.4 3.6 3.8
4
4.2 4.4 4.6 4.8
5
2.8
3
3.2 3.4 3.6 3.8
4
4.2 4.4 4.6 4.8
5
Input Voltage (V)
Input Voltage (V)
Shutdown Current vs. Input Voltage
x1 Mode Inrush Current Response
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
EN
(5V/Div)
VOUT
(1V/Div)
C2P
(2V/Div)
IIN
(200mA/Div)
VIN = 3.2V
2.8
3
3.2 3.4 3.6 3.8
4
4.2 4.4 4.6 4.8
5
Time (100μs/Div)
Input Voltage (V)
www.richtek.com
6
DS9385-01 April 2011
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
