SP4425Q Ver la hoja de datos (PDF) - Signal Processing Technologies

Número de pieza

componentes Descripción

Fabricante

SP4425Q

Electroluminescent Lamp Driver for Low Noise Applications

Signal Processing Technologies 

Handset Application

HON=VDD=ON

HON=0V=OFF

VIN=3.0V +

–

COSC=180pF

IN4148

NOTE:

Keep coil as close to

SP4425Q as possible

CINT=820pF

COSC

VSS

Coil

HON

VDD

EL1

D1

EL2

SP4425Q

Figure 5. Typical SP4425Q Application Circuit

0.1µF Low ESR

Decoupling

Capacitor

QR1 = 5kΩ

QR2 = 5kΩ

EL Lamp 5Ftl

1.5 sq.in.

4nF

NOTE:

Keep high voltage traces

short and away from VDD

and clock lines

HON=VDD=ON

HON=0V=OFF

VIN=3V

COSC=180pF

+

–

IN4148

NOTE:

Keep coil as close to

SP4425 as possible

CINT=820pF

COSC

VSS

Coil

HON

VDD

EL1

D1

EL2

SP4425Q

Figure 6. SP4425Q 3V Test Circuit

0.1µF Low ESR

Decoupling

Capacitor

QR1 = 15kΩ

700kΩ

3.9nF

QR2 = 15kΩ

Test Load

NOTE:

Keep high voltage traces

short and away from VDD

and clock lines

SP4425QDS/12

SP4425Q Electroluminescent Lamp Driver

7

© Copyright 1998 Sipex Corporation

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