OZ964_ 데이터 시트보기 (PDF) - O2Micro International

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OZ964_

Intelligent Lighting Family Product Guide

O2Micro International 

OZ9918

FEATURES

• SMBus™ version 1.1 compliant

• Supports SMBus protocol dimming control

• Supports ALS, ALS+DPST™, SMBus, DPST and SMBus + DPST brightness

modes

• 256 step dimming control

• Wide input range

• Constant operating frequency

• Soft start function

• Built-in intelligence to manage ignition and normal operation of CCFLs

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

• User-defined striking timer and shutdown delay timer

• Integrated high-side N MOSFET driver

• High drive capability

GENERAL DESCRIPTION

OZ9918 is a high performance Cold Cathode Fluorescent Lamp (CCFL) SMBus con-

troller designed for applications that require a wide input voltage range and SMBus

dimming protocol. It achieves a high efficiency power conversion with minimal

switching loss utilizing a full-bridge configuration. The IC supports a wide input range

and provides a constant, user-defined, operating frequency, ensuring that the load

operates at a fixed frequency.

OZ9918 supports Intel’s Display Power Savings Technology (DPST). The IC supports

five dimming modes with up to 256 step dimming control, that include use with an

Ambient Light Sensor (ALS), ALS + DPST, SMBus, DPST and SMBus + DPST. Low

frequency Pulse Width Modulation (LPWM) dimming coupled with high-efficiency

conversion extends notebook battery life.

APPLICATIONS

• Notebook Computer

• Point of Sale (POS) Terminal

APPLICATION DIAGRAM

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

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