OZ9928 查看數據表（PDF） - O2Micro International

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OZ9928

LCD TV Dual Controller

O2Micro International 

OZ9928

FEATURES

• Dual CCFL inverter controller

• Synchronization for multiple ICs

• Supports differential drive

• Supports system operation frequency synchronization

• Constant operating frequency

• 180 degree phase-shift PWM dimming

• Mixed-mode dimming control

• Integrated high side N-MOSFET driver

• High drive capability

• Selectable shutdown protection mode

• User-defined ignition and shutdown delay timers

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

• Open-lamp and over-voltage protection

• Soft start function

GENERAL DESCRIPTION

The OZ9928 is a high performance, cost-effective, 2-channel controller designed for

large-size Cold Cathode Fluorescent Lamp (CCFL) or External Electrode Fluorescent

Lamp (EEFL) LCD TV applications.

The controller provides six drive signals and is capable of driving full-bridge and

Class-D topologies. The drive outputs are fixed phase when used for single-side or

differential drive applications. Multiple OZ9928s can be synchronized to drive numer-

ous lamps.

OZ9928 provides total system protection for differential drive and single-side drive

applications. It receives either a DC voltage and/or external Pulse Width Modulation

(PWM) signal to perform mixed-mode PWM dimming.

APPLICATIONS

• LCD TV

APPLICATION DIAGRAM

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