OZ9902C View Datasheet(PDF) - O2Micro International
Part Name
Description
MFG CO.
'OZ9902C' PDF : 56 Pages View PDF
OZ526
FEATURES
• High frequency DC/DC power converter for LEDs
• Integrated power MOSFET
• Integrated LED current balance control circuit
• User-defined operation frequency
• Drives 1 or 2 strings
• External PWM and Analog dimming control
• Converter output over-voltage protection
• Internal power MOSFET over-current protection
• Over-current protection for each string
• Output short circuit detection
• Open diode and thermal protection
GENERAL DESCRIPTION
The OZ526 is a high efficiency DC/DC controller with an integrated power
MOSFET that drives one string or two LED strings in parallel configuration, with
multiple LEDs connected in series. It is targeted for netbook and PND (Personal
Navigation Device) backlight applications.
OZ526 provides two LED current sense inputs in an “OR” configuration for
improved backlight reliability. This allows the backlight to remain functioning in
the event that any string(s) is damaged during normal operation. The control-
ler receives an external Pulse Width Modulation (PWM) signal for the dimming
control function.
APPLICATIONS
• GPS
• PND
APPLICATION DIAGRAM
U.S. Patent #’s 7,498,793; 7,847,783; and more patents pending.
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