RT9378 RICHTEK [Richtek Technology Corporation], RT9378 Datasheet - Page 5

• Manufacturer Part Number: RT9378
• Description: 4 CHs 100mA x1/x1.5/x2 Charge Pump White LED Driver
• Manufacturer: RICHTEK [Richtek Technology Corporation]

Typical Operating Characteristics
DS9378-03 April 2011
0.95
0.85
0.75
0.65
0.55
100
0.9
0.8
0.7
0.6
0.5
1.2
0.8
0.6
0.4
0.2
x1 Mode Quiescent Current vs. Input Voltage
90
80
70
60
50
40
30
20
10
1
0
1
0
2.8
2.8
2.8
Shutdown Current vs. Input Voltage
3
3
3
Efficiency vs. Input Voltage
3.2 3.4 3.6 3.8
3.2 3.4 3.6 3.8
3.2 3.4 3.6 3.8
Input Voltage (V)
Input Voltage (V)
Input Voltage (V)
4
4
4
4.2 4.4 4.6 4.8
4.2 4.4 4.6 4.8
4.2 4.4 4.6 4.8
LED V
F
= 3.42V
5
5
5
(200mA/Div)
(2V/Div)
(5V/Div)
(2V/Div)
I
IN
V
C2P
EN
OUT
28.5
25.5
22.5
19.5
16.5
3.75
3.25
2.75
2.25
1.75
1.25
x2 Mode Quiescent Current vs. Input Voltage
3.5
2.5
1.5
30
27
24
21
18
15
4
3
2
1
2.8
2.8
V
x1 Mode Inrush Current Response
IN
3
3
= 3.7V
LED Current vs. Input Voltage
3.2 3.4 3.6 3.8
3.2 3.4 3.6 3.8
Input Voltage (V)
Input Voltage (V)
Time (100μs/Div)
4
4
4.2 4.4 4.6 4.8
4.2 4.4 4.6 4.8
RT9378
www.richtek.com
LED V
F
= 3.42V
LED1
LED2
LED3
LED4
5
5
5