OZ9902C View Datasheet(PDF) - O2Micro International
Part Name
Description
MFG CO.
'OZ9902C' PDF : 56 Pages View PDF
OZ9908B
FEATURES
• Drives up to 6 strings of LEDs
• Up to 350mA LED current per string
• Supports multiple IC operation synchronization
• Boost drive outputs 180 degree phase-shift between master and slave ICs
• Analog dimming control
• Individual PWM dimming for each string
• Over-voltage and over-current protection
• LED open/short circuit protection
• LED fault status output
GENERAL DESCRIPTION
The OZ9908B is a high performance LED driver controller optimized for large
screen LED backlight LCD TV applications. It provides an integrated six-channel
LED current regulation control circuit. Using external balance transistors for
each channel, the IC is capable of driving a current up to 350mA per LED
channel.
OZ9908B provides 6 individual external Pulse Width Modulation (PWM) dimming
interfaces for its respective LED string. The IC is suitable for LCD TV applica-
tions using a local-dimming control backlight.
When using multiple ICs, the operating frequency can be synchronized with a
180° phase-shift between the drive outputs of each IC. These features greatly
reduce the interference between ICs.
APPLICATIONS
• LCD TV
APPLICATION DIAGRAM
U.S. Patent #’s 7,498,793; 7,847,783; and more patents pending.
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