SM8143A

SEIKO NPC CORPORATION —1

EL Driver

OVERVIEW

The SM8143A is a transformer-less electroluminescent (EL) driver IC, capable of driving displays up to

switching transistor ON resistance and output circuit configuration to reduce loss. The EL drive frequency and

coil drive frequency can be controlled independently, making the driver circuit optimizable to match applica-

tion requirements. A microcontroller interface pin (ENA) is provided, which can be used to control the EL

driver ON/OFF function.

FEATURES

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Dedicated EL driver

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1.6 to 5.5V supply voltage

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Maximum operating current

• SM8143AV: 150mA max.

• SM8143AD: 100mA max.

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3.5

Ω typical output resistance

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200Vp-p maximum EL driver voltage*

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31 to 1500Hz EL drive frequency range*

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High voltage CMOS Process

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Package: VSOP-16, SON-10

*: Adjustable with external resistance.

APPLICATIONS

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Cellular phone

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Mobile equipment

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PDA

ORDERING INFORMATION

PINOUT

(Top view)

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VSOP-16

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SON-10

Device

Package

SM8143AV

VSOP-16

SM8143AD

SON-10

NC

1

CHV

NC

LDR

16

NC

OUT1

NC

OUT2

NC

VSS

NC

OCL

8

NC

VDD

ENA

9

OCE

CHV

LDR

NC

OUT1

OUT2

VSS

OCL

OCE

ENA

VDD

6

1

2

3

4

5

10

9

8

7

6