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0Z9924_ View Datasheet(PDF) - O2Micro International

Part Name
Description
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0Z9924_
O2Micro
O2Micro International O2Micro
0Z9924_ Datasheet PDF : 36 Pages
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OZ9924
FEATURES
• High efficiency, zero-voltage switching
• 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
OZ9924 is a high efficiency, Pulse Width Modulation (PWM) controller designed for
large Liquid Crystal Display Television (LCD TV) applications using multiple lamps.
OZ9924 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 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; 7,026,860; 7,075,245; 7,126,289;
7,151,394; 7,190,123; 7,248,240; and more patents pending.
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