OZ8022 datasheet(17/56 Pages) ETC2

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OZ9997

FEATURES

• High power DC/DC boost converter controller

• Drives up to 8 LED strings in parallel

• External PWM dimming control

• Integrated LED current balance control circuit

• User-defined string selection

• Multi-chip parallel operation for more than 8 LED strings

• MOSFET over-current protection

• LED short circuit and open string protection

• Thermal protection

• LED fault status output

GENERAL DESCRIPTION

The OZ9997 is a high efficiency, DC/DC controller that drives up to eight (8)

strings of LEDs in parallel configuration, with multiple LEDs in each string con-

nected in series.

The IC provides eight (8) LED current sense inputs in an “OR” configuration to

improve backlight reliability. This allows the backlight to remain functional in the

event that any string (s) is damaged during normal operation.

OZ9997 supports external Pulse Width Modulation (PWM) dimming control, and

provides an integrated circuit to balance the current flow through each

LED string.

APPLICATIONS

APPLICATION DIAGRAM

• LCD Monitor

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

OZ8022 Datasheet(PDF) 17 Page - List of Unclassifed Manufacturers