OZ965_ Просмотр технического описания (PDF) - O2Micro International

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OZ965_

Intelligent Lighting Family Product Guide

O2Micro International 

OZ9925

FEATURES

• Supports off-line applications

• Constant operating frequency

• Support positive impedance (dark effect) lamps during ignition

• Combined analog and PWM dimming control with wide dimming range

• Built-in intelligence for ignition and normal operation of CCFLs

• Built-in open-lamp and over-voltage/current protection

• Optimized soft start function

• User-defined striking and shutdown delay timers

GENERAL DESCRIPTION

OZ9925 is a cost-effective Cold Cathode Fluorescent Lamp (CCFL) power manage-

ment controller designed for multiple CCFL Liquid Crystal Display Television (LCD

TV) applications. It operates at a user-defined constant operating frequency. The

operating frequency can be synchronized with an external signal.

The controller provides a wide dimming control range and offers mixed mode dim-

ming control. OZ9925 provides two drive signals for various power conversion

topologies.

OZ9925 incorporates high voltage drive capability. The controller can take an input

voltage from 10 to 19V and deliver rail-to-rail output drive pulses.

APPLICATIONS

• LCD TV

APPLICATION DIAGRAM

U.S. Patent #’s 6,259,615; 6,396,722; 6,570,344; 6,781,325; 6,804,129; 6,809,938; 6,856,519; 6,900,993; 6,936,975;

7,075,245; 7,120,035; 7,126,289; 7,190,123; 7,248;240; and more patents pending.

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