OZ9902C View Datasheet(PDF) - O2Micro International
Part Name
Description
MFG CO.
'OZ9902C' PDF : 56 Pages View PDF
OZ8022
FEATURES
• Quasi-resonant converter controller for high brightness LEDs
• Low start-up and operating current, maximizing conversion efficiency
• Peak current mode control simplifies circuit design
• Under-voltage lockout with hysteresis
• Minimum off-time control for light-load operation, maximizing efficiency
• Provides complete protection functions:
- Maximum gate drive output at 19.5V
- Over-voltage for IC bias voltage
- Cycle-by-cycle current limit at current sense
- LED short circuit
- Output over-voltage and internal thermal
GENERAL DESCRIPTION
OZ8022 is a controller for Buck converters that use quasi-resonant conversion
technology. It can be used to drive high brightness LEDs in offline applications.
The controller is implemented with compensated peak current mode control to
regulate the average LED current.
The operation of the Buck converter is between the continuous and discontinu-
ous mode of the inductor current. During a light-load condition, it provides a
minimum off-time scheme to maximize the operating efficiency.
APPLICATIONS
APPLICATION DIAGRAM
• General Lighting
Patents pending.
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