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OZ9928_ View Datasheet(PDF) - O2Micro International

Part Name
Description
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OZ9928_
O2Micro
O2Micro International O2Micro
OZ9928_ Datasheet PDF : 36 Pages
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OZ9926A
FEATURES
• VREF and SYNC-RPT noise immunity and lamp current symmetry for start-up
• Full-bridge or dual-forward topology
• Integrated high-side N MOSFET driver
• High drive capability
• System synchronization
• Synchronization for multiple ICs
• Supports Limited Current Circuit (LCC)
• Dedicated pins for Analog and LPWM dimming
• Selectable PWM dimming polarity
• Soft start function
• Constant operating frequency
• Built-in intelligence to manage ignition and normal operation of CCFLs
• Open-lamp, over-voltage, over-current, and under-voltage lockout protection
• User-defined striking and shutdown delay timers
GENERAL DESCRIPTION
OZ9926A is a high performance controller designed for large-size Liquid Crystal
Display Television (LCD TV) applications requiring multiple lamps. It achieves a high
efficiency power conversion with minimal switching loss in full-bridge N-Channel
MOSFET topology. OZ9926A is ideal for differential drive applications.
The controller provides high drive capability, supports a wide input range, and pro-
vides a constant user-defined operating frequency for the load to operate at a fixed
frequency.
OZ9926A provides an option of selecting the Pulse Width Modulation (PWM) dim-
ming polarity, and provides two dedicated pins for analog and PWM dimming
control.
APPLICATIONS
• LCD TV
APPLICATION DIAGRAM
U.S. Patent #’s 6,259,615; 6,396,722; 6,570,344; 6,781,325; 6,804,129; 6,897,698; 6,936,975; 7,075,245;
7,126,289; 7,151,394; 7,190,123; 7,248,240; and more patents pending.
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