OZ9902C View Datasheet(PDF) - O2Micro International
Part Name
Description
MFG CO.
'OZ9902C' PDF : 56 Pages View PDF
OZ527
FEATURES
• High power DC/DC power converter
• Integrated Power N-Channel MOSFET
• Integrated LED current balance control circuit
• Drives up to 6 strings in parallel
• User-defined string selection
• Time-shift PWM phase dimming control for low audible noise
• Operation frequency synchronization
• LED open string protection
• Output short circuit or open diode protection
• LED short circuit protection
• MOSFET over-current protection
• Shutdown under abnormal condition protection
• Thermal protection
• LED fault status output
GENERAL DESCRIPTION
The OZ527 is a high efficiency DC/DC controller that drives up to six strings
connected in parallel configuration with multiple LEDs in each string connected
in series.
OZ527 provides 6 LED current sense inputs in an “OR” configuration to improve
backlight reliability. This allows the backlight to remain functioning in the event
that a string(s) is damaged during normal operation.
OZ527 supports external Pulse Width Modulation (PWM) dimming control.
APPLICATIONS
APPLICATION DIAGRAM
• GPS
U.S. Patent #’s 7,498,793; 7,847,783; and more patents pending.
37
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