R1218X Datasheet, PDF (13/14 Pages) RICOH electronics devices division – Step-up DC/DC converter for Whilte LED Backlight

10. Oscillator Frequency vs. Temperature
1400
1350
1300
1250
1200
1150
1100
1050
1000
-50
R1218x041A
Vin=3.6V
-25
0
25
50
75 100
Temperature Topt (°C)
R1218X
11. Maximum duty cycle vs. Temperature
99
R1218x041A
Vin=3.6V
97
95
93
91
89
87
85
-50 -25
0
25
50
75 100
Temperature Topt (°C)
12. OVP Detector Threshold/Released Voltage vs. Temperature
20.5
R1218x041A
Vin=3.6V
13. Supply Current vs. Temperature
360
R1218x041A
Vin=3.6V
20
320
19.5
OVP Detector
280
Threshold
240
19
200
18.5
OVP Released
160
18
Voltage
120
17.5
80
17
16.5
-50
-25
0
25
50
75
100
Temperature Topt (°C)
40
0
-50 -25
0
25
50
75 100
Temperature Topt (°C)
14. LX Current Limit vs. Temperature
1000
R1218x041A
900
800
700
600
500
400
300
-50
-25 _{Te0mperatu2re5 Topt (5°C0)}
Vin=3.6V
75
100
13