TK65931MTL TOKO, Inc, TK65931MTL Datasheet

TK65931MTL

Manufacturer Part Number

TK65931MTL

Description

Manufacturer

TOKO, Inc

Datasheets

1.TK65931MTL.pdf (16 pages)

2.TK65931MTL.pdf (16 pages)

Specifications of TK65931MTL

Date_code

05+

Packing_info

Jun-89

Current page: 1 of 16
Download datasheet (302Kb)

February 2001 TOKO, Inc.

FEATURES

DESCRIPTION

The TK6593x Electroluminescent (EL) Lamp Driver has

been optimized for battery controlled systems where

power consumption and size are primary concerns. The

miniature device size (SOT23L-6), together with the min-

iature Toko EL coils (D32FU, D31FU, D52FU), further

helps system designers reduce the space required to drive

the small EL panels.

The proprietary architecture (detailed in the Theory of

Operation section) of the TK6593x provides a constant

output power to the lamp, independent of variations in the

battery voltage. This architecture allows the output volt-

age to remain relatively constant as battery voltages

decay, without the need for directly sensing the high

voltage output of the EL driver.

TK65930

TK65931

TK65932

TK65934

LAMP FREQUENCY CODE

High Ratio of Brightness / Input Power

Constant Brightness Versus Input Supply

Changes

Optimized for 15 nf to 45 nf Panel Capacitance

Panel Voltage Slew Rates Controlled for Life

Enhancement

Panel Peak to Peak Voltage Independent of Input

Voltage and Temperature

Panel Peak to Peak Frequency Independent of

Input Voltage and Temperature

Miniature Package (SOT23L-6)

Operates with Miniature Coil

Minimum External Components

Laser-Trimmed Fixed Frequency Operation

PWM Control Method

Adjustable Output Voltage

Lower Noise (Audio and EMI)

Intensity Control Application (Refer to Application

Information)

175 Hz

200 Hz

225 Hz

275 Hz

ORDERING INFORMATION

TK65935

TK65936

TK65937

TK65938

TK65939

TK6593 MTL

300 Hz

325 Hz

350 Hz

375 Hz

400 Hz

Consult factory for availability

of other frequencies.

Lamp Frequency Code

TAPE/REEL CODE

TL: Tape Left

APPLICATIONS

The oscillator circuits for the boost converter and lamp

driver are both internally generated in the TK6593x, with-

out the need for external components. The clock fre-

quency of the boost converter is laser-trimmed to ensure

good initial accuracy that is relatively insensitive to varia-

tions in temperature and supply voltage. The clock fre-

quency of the lamp driver tracks the frequency of the boost

converter by a constant scaling factor.

Furthermore, the drive architecture of the TK6593x has

been designed to limit peak drive current delivered to the

lamp. This approach limits the slew rate of the voltage

across the lamp and has the potential to improve lamp life

and decrease RF interference.

The TK6593x is available in a miniature, 6-pin

SOT23L-6 surface mount package.

V CC

Battery Powered Systems

Cellular Telephones

Pagers

LCD Modules

Wrist Watches

Consumer Electronics

BLOCK DIAGRAM

LARGE EL LAMP DRIVER

OSCILLATOR

TK6593xM

HV BOOST

CONTROL

EL +

EL -

BRIDGE

TK6593xM

V CC

GND

IND

Page 1

IND

GND

EL +

EL -

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