OZ964_ 데이터 시트보기 (PDF) - O2Micro International

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OZ964_

Intelligent Lighting Family Product Guide

O2Micro International 

OZ964

FEATURES

• High efficiency, zero-voltage switching, full bridge topology

• Constant operating frequency

• Built-in PWM dimming control with wide dimming range

• Soft start function

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

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

• Shutdown delay for input voltage brownout condition

• Supports positive impedance (dark effect) lamps during ignition

• Built-in under-voltage lockout protection

• Toggle pin to reset the IC after shutdown

GENERAL DESCRIPTION

OZ964 is a high efficiency, Pulse Width Modulation (PWM) controller designed for

both DC/DC and DC/AC high-voltage applications. The average current mode con-

trol is suitable for DC/DC converters where both voltage and current feedback are

required, as well as for Cold Cathode Fluorescent Lamp (CCFL) backlight applica-

tions for small and large Liquid Crystal Displays (LCD).

OZ964 utilizes a PWM dimming method to achieve a wide dimming range. The IC

performs the CCFL dimming function with an analog or Low frequency PWM (LPWM)

control.

A shutdown delay function will keep the inverter module in normal operation for a

short period of time if the system input voltage suddenly drops and subsequently

resumes to a normal level.

APPLICATIONS

• LCD Monitor

• Notebook Computer

• GPS

• Point-of-Sale (POS) Terminal

APPLICATION DIAGRAM

U.S. Patent #’s 6,259,615; 6,396,722; 6,804,129; 6,897,698; 7,026,860; 7,151,394; and more patents pending.

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