PQ6CB11X1CP Datasheet, PDF (4/4 Pages) Sharp Electrionic Components – Compact SMD CMOS Step-up LED Driver

PQ6CB11X1CP
Fig.6 Effciency vs. Input Voltage
100
95
2LEDs
90
85
3LEDs
80 ^4LEDs
75
70
VF=3.8V
65
IO=20mA
Ta=25˚C
60
3 3.2 3.4 3.6 3.8 4 4.2
Input voltage VIN(V)
Fig.8 On-Resistance vs. Junction
Temperature
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
-50
VIN=VCTRL=3.6V
VSW=3.6V
ISW=250mA
-25 0 25 50 75 100 125
Junction temperature Tj (°C)
Fig.7 Oscillation Frequency Fluctuation vs.
Junction Temperature
10
VIN=VCTRL=3.6V
3LEDs / 20mA
CIN=2.2μF
CO=0.1μF
5
L=22μH
0
-5
-10
-50 -25
0 25 50 75 100 125
Junction temperature Tj (°C)
Fig.9 ON/OFF-state Voltage for Control vs.
Junction Temperature
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-50
VIN=3.6V
3LEDs / 5mA
CIN=2.2μF
CO=0.1μF
L=22μH
-25 0 25 50 75 100 125
Junction temperature Tj (°C)
■　Current-limit
This product monitors the switch current at every cycle and limits the switch current not to exceed the overcurrent
detection level.
Please set the white LED current under the maximum LED current shown in the graph indicated below within the
range of input voltage (VIN) you use.
Fig.10 Use Range of White LED
140 _Ta=25˚C
VF=3.8V(2～4LEDs)
120 VF=3.5V(6LEDs)
L=22μH
100
80 ^2LEDｓ
3LEDｓ
60
4LEDｓ
40
20
6LEDｓ
0
2.5 3 3.5 4 4.5 5 5.5
VIN(V)
4
Sheet No.: OP06061