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參數(shù)資料
| 型號(hào)： | R1218N042A |
| 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)： | 5/21頁 |
| 文件大?。?/td> | 679K |
| 代理商： | R1218N042A |
R1218x
ELECTRICAL CHARACTERISTICS
R1218xxxxA
5
Topt=25
°
C
Symbol
Item
Conditions
Min.
Typ.
Max.
Unit
V
IN
Operating Input Voltage
1.8
5.5
V
I
DD
Supply Current
V
IN
=
5.5V, V
FB
=
0V, Lx at no load
V
IN
=
5.5V, V
CE
=
0V
0.5
1.0
mA
I
standby
Standby Current
0
3.0
μ
A
V
UVLO1
UVLO Detector Threshold
V
IN
falling
1.5
1.6
V
UVLO1
+
0.1
1.7
V
V
UVLO2
UVLO Released Voltage
V
IN
rising
1.8
V
V
CEH
CE Input Voltage "H"
V
IN
=
5.5V
V
IN
=
1.8V
V
IN
=
3.6V
V
IN
=
3.6V
V
IN
=
3.6V
1.5
V
V
CEL
CE Input Voltage "L"
0.5
V
R
CE
CE Pull Down Resistance
600
1200
2200
k
ms
tshtdn
CE Shutdown Delay Time
10
V
FB
V
FB
/
T
opt
I
FB
V
FB
Voltage
0.19
0.20
0.21
V
V
FB
Voltage Temperature
Coefficient
V
FB
Input Current
V
IN
=
3.6V,
40
°
C
<
=
T
opt
<
=
85
°
C
±
150
ppm
/°C
μ
A
μ
A
μ
A
V
IN
=
5.5V, V
FB
=
0V or 5.5V
V
IN
=
3.6V, I
SW
=
100mA
R1218xxx1A
0.1
0.1
R
ON
Switch On Resistance
1.5
V
LX
=
20V
V
LX
=
29V
0
0
3.0
I
LXleak
Switch Leakage Current
R1218xxx2A
3.0
I
LXlim
Switch Current Limit
V
IN
=
3.6V
R1218xxx1A
400
700
1000
mA
Vf
Diode Forward Voltage
I
DIODE
=
100mA
V
OUT
=
20V, V
LX
=
0V
0.8
V
I
DIODEleak
Diode Leakage Current
R1218xxx1A
10
μ
A
fosc
Oscillator Frequency
V
IN
=
3.6V, V
OUT
=
V
FB
=
0V
V
IN
=
3.6V, V
OUT
=
V
FB
=
0V
1.0
1.2
1.4
MHz
Maxduty Maximum Duty Cycle
86
91
%
R1218x021A
8.5
9.5
14.0
18.5
23.0
27.5
V
OVP1
0.5
V
OVP1
0.75
V
OVP1
1.0
V
OVP1
1.25
V
OVP1
1.5
10.5
R1218x031A
13.0
15.0
R1218x041A
17.0
20.0
R1218x052A
21.5
24.5
V
OVP1
OVP Detector Threshold
V
IN
=
3.6V,
V
OUT
rising
R1218x062A
26.0
29.0
V
R1218x021A
R1218x031A
R1218x041A
R1218x052A
V
OVP2
OVP Released Voltage
V
IN
=
3.6V,
V
OUT
falling
R1218x062A
V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| R1218K021A | Step-up DC/DC converter for White LED Backlight |
| R1218K031A | Step-up DC/DC converter for White LED Backlight |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R1218N052A | 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 |
| R1218N062A | 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 |
| R1218X | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Step-up DC/DC converter for Whilte LED Backlight |
| R1218XXX1A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Step-up DC/DC converter for Whilte LED Backlight |
| R1218XXX2A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:Step-up DC/DC converter for Whilte LED Backlight |
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