Founded in April 1995, O2 Micro (NASDAQ: OIIM) is dedicated to the design, development and sale of power management systems for communications, computers, consumer electronics, industrial and automotive applications. O2 Micro has the world's leading power management system architecture, rapid market response, strong customer relationships and strong digital-analog hybrid design capabilities. O2 Micro has an experienced design and management team in the industry, branches around the world and many years of successful performance. All of the company's chips are produced in world-renowned chip manufacturers. O2 Micro attaches great importance to the development and protection of intellectual property rights, and has a wide range of international invention patents in chips and application fields, as well as numerous registered trademarks and other intellectual property rights. O2 Micro's customers include the world's leading manufacturers in the fields of communications, computers, consumer electronics, industrial and automotive.
Quality Policy: O2 Micro has established, promoted, and implemented the following quality policy to promote and support the goals of the quality system. O2 Micro is committed to providing customers with power management solutions that achieve customer satisfaction by: designing high-quality products to achieve maximum system compatibility, delivering products on time every time, and promoting quality system improvements based on measured performance. Quality Mission Statement It is the continuous improvement in the process. We achieve the goal of improving customer satisfaction by meeting or exceeding user requirements, while making it easier for customers to do business with us.
Environmental Policy: O2 Micro is committed to preventing pollution and continuously improving the Environmental Management System (EMS). O2 Micro will develop environmentally safe technologies, including but not limited to: reducing power consumption worldwide through designing power-saving devices, reducing the use of toxic and hazardous substances in product materials and manufacturing processes, and we are committed to becoming a responsible and sustainable global organization in compliance with applicable laws and other requirements worldwide. From design, procurement, manufacturing to distribution, we will operate and manage all aspects of our business in a manner that promotes an earth-friendly environment.
OZ9979 Six String LED Controller with Phase-Shift Dimming, Internal MOSFET
Features
LED Backlight Controller ICs for NOTEBOOK / NETBOOK APPLICATIONS,for Small-Size LCD Panels
OZ9979 is a high efficiency, DC/DC controller that drives up to six strings of LEDs connected in parallel configuration; with multiple LEDs in each string connected in series. It is targeted for notebook backlight applications.
The IC provides six (6) LED current sense inputs in an “OR” configuration for improved backlight reliability. This allows the backlight to remain functional in the event that any string (s) is damaged during normal operation.
Parameters
• High frequency DC/DC boost converter controller
• Integrated power MOSFET, and LED current balance control circuit
• Drives up to 6 strings in parallel
• Supports external, internal PWM and analog dimming
• Enhanced dimming resolution
• Supports 6 equal-delay PWM dimming signals
• PWM dimming frequency synchronized with external signal
• Protection includes: MOSFET over-current, over-voltage, LED short circuit
detection, output short circuit/open diode, and thermal
• Soft start function
• package QFN20
Application
Notebook Computer
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