OZ9902C View Datasheet(PDF) - O2Micro International
Part Name
Description
MFG CO.
'OZ9902C' PDF : 56 Pages View PDF
OZ9956E
FEATURES
• Highly integrated LED driver controller
• 2.5V – 33V input voltage range
• Drives up to 6 strings of LEDs in parallel
• Up to 30mA current per string
• Built-in LED current balance control circuit
• Integrated power MOSFET
• Built-in 20kHz PWM dimming control eliminates audible noise
• Supports external PWM dimming control
• 100:1 dimming ratio at 20kHz PWM frequency
• Protection: over-voltage, over-current, thermal, and open rectifier diode
GENERAL DESCRIPTION
The OZ9956E is a highly efficient, integrated LED driver controller designed for
middle power LCD backlight applications. Featuring a very wide operational
input voltage range, it works as a universal solution for applications powered by
one or multiple Li-Ion battery cells or those directly powered by an adapter.
It provides six (6) LED current sense inputs in an “OR” configuration for im-
proved backlight reliability. This allows the backlight to remain functional in the
event that any string (s) is damaged during normal operation.
OZ9956E accepts external Pulse Width Modulation (PWM) dimming signals to
perform either directly controlled external or fixed 20kHz internal dimming func-
tion.
APPLICATIONS
APPLICATION DIAGRAM
• Notebook/Netbook
Computer
U.S. Patent #’s 7,498,793; 7,847,783; and more patents pending.
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