OZ522 datasheet(33/56 Pages) ETC2

33 / 56 page

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.

OZ522 Datasheet(PDF) 33 Page - List of Unclassifed Manufacturers