SP4480 datasheet(7/13 Pages) SIPEX

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SP4480DS/06

SP4480 Dual Electroluminescent Lamp Driver

Printed Circuit Board Layout Sugges-

tions

The EL driver's high-frequency operation makes

PCB layout important for minimizing electrical

noise. Keep the IC's GND pin and the ground

leads of C1 and C

INT less than 0.2in (5mm) apart.

Also keep the connections to the COIL pin as

short as possible. To maximize output power

and efficiency and minimize output ripple volt-

age, use a ground plane and solder the IC's VSS

pin directly to the ground plane.

EL Lamp Driver Design Challenges

There are many variables which can be opti-

mized for specific applications. The amount of

light emitted is a function of the voltage applied

to the lamp, the frequency at which is applied,

the lamp material, the lamp size, and the induc-

tor used. Sipex supplies characterization charts

to aid the designer in selecting the optimum

circuit configuration.

Sipex will perform customer application evalu-

ations, using the customer's actual EL lamp to

determine the optimum operating conditions for

specific applications. For customers consider-

ing an EL backlighting solution for the first

time, Sipex is able to provide retrofits to non-

backlit products for a thorough electrical and

cosmetic evaluation. Please contact your local

Sipex sales Representative or the Sipex factory

directly to initiate this valuable service.

SP4480 Datasheet(PDF) 7 Page - Sipex Corporation