OZ9936 View Datasheet(PDF) - O2Micro International
Part Name
Description
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OZ9936 Datasheet PDF : 11 Pages
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OZ9936
LCD Monitor CCFL Inverter Controller
FEATURES
• Built-in intelligence to ignite positive
impedance CCFLs
• Low cost LCD monitor inverter solution
• Constant operating frequency
• Built-in intelligence for ignition and normal
operation of CCFLs
• Built-in open-lamp protection and over-
voltage protection
• Optimized soft-start function
• Supports both analog and external PWM
dimming control
• Shutdown delay for input brownout
condition
• Higher reliability and longer CCFL life
• Supports multiple CCFLs
• Minimum external components
ORDERING INFORMATION
Part Number
OZ9936G
OZ9936GN
OZ9936IG
OZ9936IGN
OZ9936D
OZ9936DN
Temp Range
0oC to 70oC
0oC to 70oC
-40oC to 85oC
-40oC to 85oC
0oC to 70oC
0oC to 70oC
Package
8-pin SOIC
8-pin SOIC,
Leadfree
8-pin SOIC
8-pin SOIC,
Leadfree
8-pin PDIP
8-pin PDIP,
Leadfree
OZ9936 operates at a constant operating
frequency that eliminates any undesired
interference between the controller and LCD
panel. OZ9936 drives all types of CCFLs and is
able to ignite positive impedance CCFLs.
OZ9936 provides a shutdown delay feature for
input brownout condition.
The control logic provides a regulated ignition
voltage and appropriate protection for over-
voltage or over-current conditions.
The OZ9936 offers a high level of integration,
while maintaining flexibility and high-efficiency
operation that reduces component heating. This
results in higher reliability and longer CCFL life.
The proprietary (patent pending) design
technique provides a simpler, lower-cost system
solution.
The CCFL backlight controller is designed for
low-cost LCD monitor applications. OZ9936
provides an analog dimming control where the
CCFL brightness is controlled by adjusting the
current amplitude. In addition, the IC provides a
PWM dimming function with an external PWM
signal. The controller converts unregulated DC
voltages into a nearly sinusoidal lamp voltage
and current waveforms.
PIN DIAGRAM
GENERAL DESCRIPTION
The patent pending OZ9936 is a cost-effective
CCFL (Cold Cathode Fluorescent Lamp) Power
Management controller designed for driving
CCFLs in Liquid Crystal Display (LCD)
applications.
The OZ9936 provides two drive signals for most
power conversion topologies, such as push-pull,
half-bridge, full-bridge or Class-D inverters while
maintaining high-efficiency operation. The highly
integrated controller provides current and voltage
regulation, soft-start operation, over-voltage
protection and an external enabling function while
maintaining a high-degree of design flexibility.
The application requires a minimum number of
off-the-shelf components.
1 ENA_SST_CMP ISEN 8
2 RT
DIM 7
3 GNDA
VDDA 6
4 DRV2
DRV1 5
TYPICAL OPERATING
CIRCUIT
04/06/05
Copyright ©2003-5 by O2Micro
OZ9936-DS-1.1
All Rights Reserved
CONFIDENTIAL
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