OZ964_ 데이터 시트보기 (PDF) - O2Micro International

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OZ964_

Intelligent Lighting Family Product Guide

O2Micro International 

OZ9910A

FEATURES

• Controller for high-voltage DC/DC and DC/AC converters

• High-efficiency, zero voltage switching dual forward controller

• Supports positive impedance (dark effect) lamps during ignition

• Feed forward compensation

• Combined analog and/or PWM control modes for wide-range load regulation

• Supports wide input voltage range

• Constant operating frequency

• Soft start function

• Built-in open-load, over-voltage, and over-current protection

• Built-in under-voltage lockout function

• Shutdown delay timer

GENERAL DESCRIPTION

The OZ9910A is a high-efficiency, dual forward Pulse Width Modulation (PWM) con-

troller designed for both DC/DC and DC/AC high voltage applications.

The OZ9910A provides a wide dimming range through Low frequency PWM (LPWM)

and/or analog dimming controls. It also provides an option for selecting a different

turn-on frequency from the operation frequency that is suitable for loads such as

Cold Cathode Fluorescent Lamp (CCFL) and TWT (Traveling Wave Tube).

The OZ9910A provides a built-in feed-forward compensation function for applica-

tions requiring a wider, dynamic input voltage range. The feed-forward compensation

feature optimizes line regulation. OZ9910A has an integrated shutdown delay feature

for positive impedance (dark effect) lamp during ignition and open-lamp conditions.

APPLICATIONS

• LCD Monitor

• Notebook Computer

• GPS

• Point-of-Sale (POS)

APPLICATION DIAGRAM

U.S. Patent #’s 6,259,615; 6,396,722; 6,804,129; 6,809,938; 6,856,519; 6,897,698; 6,900,993; 7,120,035; 7,151,394;

and more patents pending.

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