IC manufacturers O2 Micro International Ltd
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Overview
| Topology | Power Factor Correction |
| Input voltage | 85-265 V |
| Output 1 | 26 V / 0.25 A |
Description
OZ9992/92A are controllers for offline AC/DC flyback converter applicationsthat use quasi-resonant power conversion technology. One application using OZ9992/92A drives high power LEDs using compensated peak current mode control to regulate the average LED current.
OZ9992/92A require very low start-up current, which maximizes the efficiency of the converter. Each IC provides a proprietary Free Dimming technology using a non-dimming ON/OFF wall switch.
Features
- Quasi-resonant AC/DC converter controller for high brightness LEDs
- Three-step analog dimming control using wall switch
- 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
- Constant output power for universal AC input
Provides complete protection functions:
-Maximum gate drive output at 18.0V
-Over-voltage for IC bias voltage-Cycle-by-cycle current limit
-LED short circuit; output over-voltage; and internal thermal
Typical applications
- TV/Monitor Power Supplie
- Power Adapter/Battery Charger
- General Lighting