OZ9939
LCDM Inverter Controller
Controlled Recipient #106805 printed on 3/6/2006. Updates will be provided to registered
recipients.
FEATURES
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Negative 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
The control logic provides a regulated ignition
voltage and appropriate protection features for
over-voltage or over-current conditions.
The OZ9939 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
ORDERING INFORMATION
Part
Number
OZ9939G
OZ9939GN
OZ9939IG
OZ9939IGN
OZ9939D
OZ9939DN
Temp Range
o
o
-20 C to 85 C
o
o
-20 C to 85 C
o
o
-40 C to 85 C
o
o
-40 C to 85 C
o
o
-20 C to 85 C
o
o
-20 C to 85 C
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 OZ9939 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 OZ9939 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).
SIMPLIFIED APPLICATION
CIRCUIT
10/27/2005
OZ9939-DS-1.1
Copyright
©
2005 by O
2
Micro
All Rights Reserved
Patent#6,559,606, #6,856,519 & #6,809,938
11
Page 1
CONFIDENTIAL
MICRO-ELECTRONICS [ Micro Electronics ]
