High Voltage EL Lamp Driver
CPC6826
Features
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•
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1.8V to 3.5V Supply Voltage
DC to AC Conversion
Adjustable Output Frequency
Adjustable Switch Frequency
Output Voltage Regulation
Enable/Disable Function
Split Power Supply Capability
< 100nA Shutdown Current
Description
Clare’s CPC6826 is an electroluminescent (EL) lamp
driver that is designed for applications operating with
an input supply voltage range of 1.8V to 3.5V. The
CPC6826 can also be used in a split-supply
configuration, which enables the designer to specify
operation with an input voltage as low as 1.5V.
Only five passive, external components are required:
an inductor, a capacitor, and a diode to complete the
boost switcher circuit; and two resistors to set the
frequency of the two internal oscillators. These few
components and the CPC6826 together generate the
typical 170V
P-P
AC signal required to drive an EL
lamp.
The configuration of the CPC6826, with designer
access to important components, allows maximum
design flexibility for optimal efficiency and brightness.
Applications
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Mobile Cellular Phones
Pagers
Portable Transceivers
Remote Control Units
Calculators
Ordering Information
Part
CPC6826U
MSOP-8
Description
Figure 1. CPC6826 Block Diagram
5
V
DD
L
X
1
2
Switch
Osc
Q
6
C
S
R
SW-osc
8
Q
Output
Osc
Q
V
A
+
Disable
-
Vsen
Vref
R
EL-osc
GND
3
4
Q
7
V
B
DS-CPC6826 - R00C
www.clare.com
1
CLARE [ CLARE, INC. ]
