DatasheetQ Logo
Electronic component search and free download site.
Transistors,MosFET ,Diode,Integrated circuits

O9938GN View Datasheet(PDF) - O2Micro International

Part Name
Description
Manufacturer
O9938GN
O2Micro
O2Micro International O2Micro
O9938GN Datasheet PDF : 12 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
OZ9938
LCDM Inverter Controller
FEATURES
Positive PWM dimming polarity
Constant operating frequency
Drives positive/negative-impedance lamps
during ignition
High drive current for external MOSFETs
User-defined ignition time and shutdown
delay time
Multiple mode dimming control
Built-in intelligence for ignition and normal
operation of CCFLs
Built-in open-lamp protection and over-
voltage protection for backlight system
Optimized soft-start function
ORDERING INFORMATION
Part
Number
OZ9938G
OZ9938GN
OZ9938IG
OZ9938IGN
OZ9938D
OZ9938DN
Temp Range
-20oC to 85oC
-20oC to 85oC
-40oC to 85oC
-40oC to 85oC
-20oC to 85oC
-20oC to 85oC
Package
16-pin SOIC
16-pin SOIC
Lead-Free
16-pin SOIC
16-pin SOIC
Lead-Free
16-pin DIP
16-pin DIP
Lead-Free
GENERAL DESCRIPTION
The OZ9938 is a high performance, cost-effective
CCFL (Cold Cathode Fluorescent Lamp)
controller designed for driving large-size Liquid
Crystal Display (LCD) applications requiring 2 to
6 CCFLs.
The controller converts unregulated DC voltages
into a nearly sinusoidal lamp voltage and current
waveforms.
The OZ9938 provides two drive signals for most
power conversion topologies while maintaining
high-efficiency operation. The PWM controller
provides a soft-start operation, current and
voltage regulation, over-voltage and over-current
protection, high drive capability and multiple
dimming functions (internal PWM or external
PWM or analog dimming functions).
The control logic provides a regulated ignition
voltage and appropriate protection features for
over-voltage or over-current conditions.
The OZ9938 offers a high level of integration,
while maintaining flexibility and high-efficiency
operation that reduces external component
heating, resulting in higher reliability and longer
CCFL life. The proprietary design technique
provides a simple, low-cost system solution.
PIN DIAGRAM
SIMPLIFIED APPLICATION
CIRCUIT
10/14/2005
OZ9938-DS-1.1
Copyright 2005 by O2Micro
All Rights Reserved
Patent#6,559,606, #6,856,519 & #6,809,938
Page 1
CONFIDENTIAL
 

Share Link: 

datasheetq.com  [ Privacy Policy ]Request Datasheet ] [ Contact Us ]