R1218X Ricoh Corporation, R1218X Datasheet - Page 9

• Manufacturer Part Number: R1218X
• Description: Step Up DC/DC Converter
• Manufacturer: Ricoh Corporation

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