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參數(shù)資料
| 型號： | MIC4827 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | Low Input Voltage, 180VPP Output Voltage, EL Driver |
| 中文描述： | 低輸入電壓，輸出電壓180VPP，EL驅(qū)動 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大小： | 142K |
| 代理商： | MIC4827 |
MIC4827
Application Information
Inductor
In general, smaller value inductors, which can handle more
current, are more suitable to drive larger size lamps. As the
inductor value decreases, the switching frequency (con-
trolled by R
SW
) should be increased to avoid saturation or the
input voltage should be increased. Typically, inductor values
ranging from 220
μ
H to 560
μ
H can be used. Murata offers the
LQH3C series up to 560
μ
H and LQH4C series up to 470
μ
H,
with low DC resistance. A 220
μ
H Murata (LQH4C221K04)
inductor is recommended for driving a lamp size of 3 square
inches. It has a maximum DC resistance of 4.0
.
Micrel
MIC4827
8
September 2001
Pre-designed Application Circuit
R1
332k
R2
3.32M
Li-Ion Battery
V
3.0V to 4.2V
C1
0.22
μ
F/10V
Murata
GRM39X7R 224K10
C
0.01
μ
F/100V
GRM40X7R103K
D1
Vishay Telefunken
MCL4148
L1
220
μ
H
Murata
LQH4C221K04
1
5
6
8
7
2
3
4
SW
CS
VA
VB
VDD
RSW
REL
GND
MIC4827
3in
2
LAMP
C2
10
μ
F/6.3V
Murata
GRM42-6X5R106K6.3
V
IN
3.3V
I
IN
V
A
–
V
B
180V
PP
F
EL
106Hz
Lamp Size
3 in
2
28mA
TIME (2ms/div)
V
B
(
V
A
(
V
A
—
V
B
(
Figure 5. Typical 100Hz EL Driver for 3in
2
Lamp
Diode
The application circuit specifies the 1N4148 or equivalent. It
has a forward current of 150mA and a typical forward voltage
of 950mV. For applications that are not cost driven, a fast-
switching diode with lower forward voltage and higher re-
verse voltage can be used to enhance the efficiency, such as
BAV20WS or BAS20W.
Output Capacitor
Low ESR capacitors should be used at the regulated boost
output (CS pin) of the MIC4827 to minimize the switching
output ripple voltage. Selection of the capacitor value will
depend upon the peak inductor current, inductor size, and the
load. MuRata offers the GRM42-6 series with up to 0.047
μ
F
at 100V, with a X7R temperature coefficient in 1206 surface-
mount package. Typically, values ranging from 0.01
μ
F to
0.1
μ
F at 100V can be used for the regulated boost output
capacitor.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC4827_05 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Low Input Voltage, 180VPP Output Voltage, EL Driver |
| MIC4827_09 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Low Input Voltage, 180VPP Output Voltage, EL Driver |
| MIC4827BMM | 功能描述:IC EL DRIVER 180VPP OUT 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 照明，鎮(zhèn)流器控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:CCFL 控制器 頻率:40 ~ 80 kHz 電流 - 電源:5mA 電流 - 輸出:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) 其它名稱:90-3991V+V01 |
| MIC4827BMM TR | 功能描述:IC EL DRIVER 180VPP OUT 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 照明，鎮(zhèn)流器控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:CCFL 控制器 頻率:40 ~ 80 kHz 電流 - 電源:5mA 電流 - 輸出:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) 其它名稱:90-3991V+V01 |
| MIC4827BMMTS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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