R1218K021A RICOH [RICOH electronics devices division], R1218K021A Datasheet - Page 15

• Manufacturer Part Number: R1218K021A
• Description: Step-up DC/DC converter for White LED Backlight
• Manufacturer: RICOH [RICOH electronics devices division]

15) OVP Transient Response (Topt=25°C)
16) Efficiency dependence on inductors (4 LED)
15.0
12.5
10.0
7.5
5.0
2.5
90
85
80
75
70
65
60
55
50
35
30
25
20
15
10
R1218x041A (Intemal Diode Type)
5
0
0
0
0
0
OVP Voltage
OVP Voltage
20
20
LED Current l
5
R1218x021A
R1218x062A
40
40
Time (ms)
Time (ms)
10
LQH32CN220K53
LQH32CN100K53
GLF2012T220K
GLF2012T100K
60
LED
60
(mA)
15
80
V
80
IN
=3.6V
100
100
20
25
20
15
10
5
0
0
OVP Voltage
20
R1218x041A
40
Time (ms)
60
80
R1218x
100
15