R1218X Datasheet, PDF (9/14 Pages) RICOH electronics devices division – Step-up DC/DC converter for Whilte LED Backlight

100
90
80
70
60
50
40
30
20
10
0
0
R1218X031A
4
8
12
LED_電流 ILED (mA)
VIN=4.2V
16
20
3. Efficiency vs. ILED (4 LED ) L: LQH32CN220, Topt=25°C
100
90
80
70
60
50
40
30
20
10
0
0
R1218X041A
VIN=2.7V
4
8
12
16
20
LED Current ILED (mA)
100
90
80
70
60
50
40
30
20
10
0
0
100
90
80
70
60
50
40
30
20
10
0
0
R1218X041A
VIN=4.2V
4
8
12
16
20
LED Current ILED (mA)
R1218X
R1218X041A
VIN=3.6V
4
8
12
16
20
LED Current ILED (mA)
9