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OZ9932 Datasheet Preview

OZ9932 Datasheet

LCD Monitor CCFL Inverter Controller

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OZ9932
LCD Monitor CCFL Inverter Controller
FEATURES
Built-in intelligence to ignite positive
impedance CCFLs
Universal panel interface
Enhanced output drive capability
Over 200 steps dimming control
Low cost LCD TV inverter solution
Constant operating frequency
Operating frequency can be synchronized
with external signal
Integrated synchronized PWM dimming
control with wide dimming range
Built-in intelligence for ignition and normal
operation of CCFLs
Built-in open-lamp protection and over-
voltage protection
Optimized soft-start function
Shutdown delay for input voltage brownout
Supports multiple CCFLs
ORDERING INFORMATION
Part Number
OZ9932G
OZ9932GN
OZ9932D
OZ9932DN
Temp Range
0oC to 70oC
0oC to 70oC
0oC to 70oC
0oC to 70oC
Package
8-pin SOIC
8-pin SOIC,
Lead-Free
8-pin PDIP
8-pin PDIP,
Lead-Free
GENERAL DESCRIPTION
The patent pending OZ9932 is a cost-effective
CCFL (Cold Cathode Fluorescent Lamp) Power
Management controller designed for CCFL,
Liquid Crystal Display (LCD) applications.
The OZ9932 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
controller converts unregulated DC voltages into
nearly sinusoidal lamp voltage and current
waveforms. The highly integrated controller
encompasses current and voltage regulation,
soft-start operation, over-voltage protection and
an external enabling function while maintaining a
high-degree of design flexibility.
the controller and LCD panel. OZ9932 drives all
types of CCFLs and is able to ignite positive
impedance CCFLs. OZ9932 provides a
shutdown delay feature for input voltage
brownout condition.
The controller provides a wide dimming range by
converting an external analog control input into a
low-frequency Pulse Width Modulation (LPWM)
dimming function. The control logic provides a
regulated ignition voltage and appropriate
protection for over-voltage or over-current
conditions.
The OZ9932 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.
With its enhanced output drive capability,
OZ9932 is ideal for LCD monitor and LCD TV
applications.
PIN DESCRIPTION
1 ENA_SST_CMP ISEN 8
2 CT
3 GNDA
VSEN_DIM 7
VDDA 6
4 DRV2
DRV1 5
SIMPLIFIED APPLICATION
DIAGRAM
OZ9932 operates at a constant operating
frequency. The operating frequency can be
synchronized with an external signal that
eliminates any undesired interference between
10/04/04
Copyright © 2004 by O2Micro
OZ9932-DS-0.95
All Rights Reserved
Page 1
U.S. Patent #6,559,606
CONFIDENTIAL
Free Datasheet http://www.datasheet4u.com/




O2Micro

OZ9932 Datasheet Preview

OZ9932 Datasheet

LCD Monitor CCFL Inverter Controller

No Preview Available !

PIN DESCRIPTION
OZ9932
Names
ENA_SST_CMP
CT
GNDA
DRV2
DRV1
VDDA
VSEN_DIM
ISEN
Pin No.
1
2
3
4
5
6
7
8
Description
Enable, Soft Start Time and Compensation
Timing Capacitor to Set Striking, Operating and LPWM Frequency
Ground
N MOSFET Drive Output
N MOSFET Drive Output
Supply Voltage
Voltage Sense_Dimming Voltage
Current–Sense Feedback
ABSOLUTE MAXIMUM RATINGS(1)
Input Voltage VDDA
GNDA
Signal Inputs
7.0V
+/- 0.3V
-0.3V to VDDA +0.3V
Operating Temp.
OZ9932
0oC to +70oC
Operating Junction Temp.
Storage Temp.
125oC
-55oC to 150oC
RECOMMENDED OPERATING RANGE
VDDA - Input Voltage
fop - Operating Frequency
Thermal Impedance (θJ-A)
- 8-pin SOIC
Thermal Impedance (θJ-A)
- 8-pin PDIP
4.5V to 5.5V
30KHz to 150KHz
113oC/W
74oC/W
Note (1): The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed.
The device should not be operated at these limits. The “Electrical Characteristics” table defines the conditions for actual
device operation. Exposure to absolute maximum rated conditions for extended periods may affect device reliability.
CONFIDENTIAL
OZ9932-DS-0.95
Page 2


Part Number OZ9932
Description LCD Monitor CCFL Inverter Controller
Maker O2Micro
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OZ9932 Datasheet PDF






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