參數(shù)資料
型號: R1218K031A
廠商: Ricoh Co., Ltd.
英文描述: Step-up DC/DC converter for White LED Backlight
中文描述: 升壓直流/直流轉(zhuǎn)換器的白光LED背光
文件頁數(shù): 6/21頁
文件大?。?/td> 679K
代理商: R1218K031A
R1218x
TYPICAL APPLICATIONS
6
R1218x041A
R1218x062A
C1
1
μ
F
V
IN
L
X
CE
GND
L1
22
μ
H
C2
0.22
μ
F
R1
10
V
OUT
V
FB
C1
1
μ
F
V
IN
L
X
CE
GND
L1
22
μ
H
C2
0.22
μ
F
R1
10
V
OUT
V
FB
LED Current setting
LED current can be set with feedback resister(R1)
I
LED
=
0.2 / R1
LED Dimming Control, Softstart
(1) LED dimming control by PWM signal to CE pin
LED dimming control is possible by forcing PWM signal to CE pin.
When the power-on or start up with CE pin, softstart function works, however, after that, if the CE pin is set
as "L" and set CE pin "H" again during the shutdown delay time, softstart function is disabled and starts up
fast to normal mode, therefore 200Hz to 5kHz PWM signal is standard. By the CE pin input, LED turns on
and off. Average LED current varies depending on the duty cycle of CE input. Too high frequency PWM
signal is not effective because of its delay.
CE
V
FB
R1
Dimming controle by CE pin input
相關(guān)PDF資料
PDF描述
R1218K041A Step-up DC/DC converter for White LED Backlight
R1218K052A Step-up DC/DC converter for White LED Backlight
R1218K062A Step-up DC/DC converter for White LED Backlight
R1218N021A Step-up DC/DC converter for White LED Backlight
R1218N022A Step-up DC/DC converter for White LED Backlight
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
R1218K041A 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Step-up DC/DC converter for White LED Backlight
R1218K052A 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Step-up DC/DC converter for White LED Backlight
R1218K062A 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Step-up DC/DC converter for White LED Backlight
R1218N021A 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Step-up DC/DC converter for White LED Backlight
R1218N022A 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Step-up DC/DC converter for White LED Backlight