OZ9986SLASH datasheet(23/56 Pages) ETC1

23 / 56 page

OZ9904

FEATURES

• Supports up to 4 strings

• Up to 355mA LED current per string

• Supports external and internal PWM dimming control

• Supports analog dimming

• Over-voltage and over-current protections in applications

• Supports LED open/short circuit protections in applications

• LED fault status output

GENERAL DESCRIPTION

The OZ9904 is a LED driver controller optimized for large screen LED backlight

LCD TV applications. It provides an integrated four-channel LED current control

circuit. In application, it controls external balance transistors to maintain the cur-

rent balance among LED strings.

OZ9904 supports both internal and external Pulse Width Modulation (PWM)

dimming methods for brightness control of LCDs for various system applica-

tions. The internal PWM dimming signal can also be synchronized with the verti-

cal sync signal of the LCD display.

The IC further supports an analog dimming control function, which adjusts the

LED current amplitude of all the four ISEN channels simultaneously.

APPLICATIONS

APPLICATION DIAGRAM

• LCD TV

U.S. Patent #’s 7,498,793; 7,847,783; and more patents pending.

OZ9986/ Datasheet(PDF) 23 Page - List of Unclassifed Manufacturers