GB98A データシートの表示（PDF） - O2Micro International

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GB98A

Intelligent Lighting Family Product Guide

O2Micro International 

OZ9956B

FEATURES

• High frequency DC/DC power converter controller

• Drives up to 6 strings in parallel

• Integrated LED current balance control circuit

• Wide input voltage range

• Up to 2.0MHz switching frequency

• External PWM dimming

• Over-voltage and over-current protection

• Soft start function

GENERAL DESCRIPTION

OZ9956B is a high efficiency, DC/DC controller that drives up to six (6) strings

of LEDs in parallel configuration, with multiple LEDs in each string connected in

series. It is targeted for notebook/netbook applications.

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.

OZ9956B can receive either an analog signal or an external Pulse Width Modu-

lation (PWM) signal for the dimming control function.

This IC provides an integrated circuit to balance the current flow through each

LED string, as well as, the integrated power MOSFET.

APPLICATIONS

• Notebook/Netbook

Computer

APPLICATION DIAGRAM

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

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