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MIC4826M

更新时间： 2024-09-29 04:44:07
品牌 Logo 应用领域
美国微芯 - MICROCHIP 驱动光电二极管
页数 文件大小 规格书
8页 79K
描述
EL DISPLAY DRIVER, PDSO8

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中文翻译

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MIC4826M 数据手册

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MIC4826  
High Voltage EL Lamp Driver  
Advance Information  
General Description  
Features  
The MIC4826 is a hivoltage driver designed for driving EL  
lamps of up to 14nF (typically 4.5 square inches). The input  
supply voltage range is from 1.8V to 3.5V. The device uses  
a single inductor and a minimum number of passive compo-  
nents. The nominal regulated output voltage that is applied to  
the EL lamp is ±80V. the chip can be enabled/disabled by  
• Processed with high voltage CMOS technology  
• 1.8V to 3.5V operating supply voltage  
• DC to AC conversion  
• Adjustable output frequency  
• Adjustable switch frequency  
• Output voltage regulation  
connecting the resistor on R  
to V /ground.  
• Enable/disable function  
SW-OSC  
DD  
The MIC4826 has two internal oscillator, a switching MOS-  
FET, andahighvoltageELlampdriver. Thefrequencyforthe  
switching MOSFET is set by an external resistor connected  
Applications  
• Mobile Cellular Phones  
• Pagers  
• Portable transcievers  
• Remote control units  
• Calculators  
between the R  
pin and the V  
pin. An external  
EL-OSC  
DD  
inductor is connected between C and ground. The EL lamp  
S
is conected between V and V .  
A
B
The switching MOSFET charges the external inductor and  
discharges it into the capacitor at C . The voltage at C will  
Ordering Information  
S
S
start to increase. Once the voltage at C reaches a nominal  
S
Part Number  
MIC4826MS  
MIC4826M  
Junction Temp. Range*  
–25°C to +85°C  
Package  
value of 80V, the switching MOSFET is turned OFF to  
conserve power. The outputs V and V are configured as an  
8-lead MSOP  
8-lead SOP  
A
B
–25°C to +85°C  
H-bridge and are switcng in oppisite states to achieve 160V  
peak-to-peak across the EL lamp.  
Typical Application  
ON = VDD = VIN  
OFF = 0V  
REL  
RSW  
L
R
R
EL-osc  
V
SW-osc  
X
DD  
EL Lamp  
C
S
V
V
A
L
x
1N4148  
ETC 4826  
B
CS  
100V  
VIN  
GND  
4.7•F  
Operating VDD Voltage: 1.8V to 3.5V  
EL lamp Size: Up to 2.5 in2  
Brightness: 3.0 to 5.0 ft-lm  
Figure 1. Single Supply Configuration  
VIN  
IIN  
VCS  
fEL  
LX  
CS  
RSW  
REL  
2M  
Lamp Size Brightness  
3.0in2  
4ft-lm  
3.0V 23mA 80V 195Hz 560µA 0.01µF 750k  
Typical Performance  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com  
July 2000  
1
MIC4826  
12345678

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