OZ9902C View Datasheet(PDF) - O2Micro International
Part Name
Description
MFG CO.
'OZ9902C' PDF : 56 Pages View PDF
OZ9920
FEATURES
• Drives up to 4 strings of LEDs
• High voltage gate drive for the boost converter
• Two blocks individual PWM dimming control for 3D TVs
• Internal PWM dimming control synchronization with VSYNC
• 10:1 analog dimming ratio
• Up to 1000:1 external PWM dimming ratio
• Output over-voltage protection
• Thermal protection
• LED open/short circuit protection
• Open-diode protection in boost converter
GENERAL DESCRIPTION
The OZ9920 is a LED driver controller optimized for large screen LED backlight,
global and/or 3-dimensional TV applications. It provides a high voltage gate
driver for the boost converter, which is designed to drive high voltage power
MOSFETs.
It provides an integrated four-channel LED current regulation control circuit
through the use of external high voltage N-channel MOSFETs.
OZ9920 supports both internal and external Pulse Width Modulation (PWM)
dimming interfaces for various system applications. The internal PWM dimming
signal can be synchronized with the VSYNC signal of the LCD display.
APPLICATIONS
APPLICATION DIAGRAM
• LCD TV
U.S. Patent #’s 7,498,793; 7,847,783; and more patents pending.
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