RT9368A Datasheet, PDF (7/12 Pages) Richtek Technology Corporation – 4-Channel Charge Pump White LED Driver with Low Dropout Current Source

Typical Operating Characteristics
LED Current vs. Input Voltage
21.0
LED2
20.5
LED4
VF = 3.3V
20.0
19.5
LED1
LED3
19.0
18.5
18.0
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Shutdown Current vs. Input Voltage
1.5
1.2
0.9
0.6
0.3
0
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Oscillator Frequency vs. Input Voltage
300
250
200
150
100
50
0
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
DS9368A-06 April 2011
RT9368A
95
90
85
80
75
70
65
60
55
50
2.6
Efficiency vs. Input Voltage
VF = 3.3V
3 3.4 3.8 4.2 4.6 5 5.4 5.8
Input Voltage (V)
Quiescent Current vs. Input Voltage
4.5
4
X2 Mode
3.5
3
2.5
2
1.5
X1 Mode
1
0.5
0
2.6
3.1
3.6
4.1
4.6
5.1
5.6
Input Voltage (V)
Enable Voltage vs. Input Voltage
1.20
1.15
1.10
1.05
Rising
1.00
0.95
Falling
0.90
0.85
0.80
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
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