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OZ9RR Datasheet Preview

OZ9RR Datasheet

LCD Monitor CCFL Inverter Controller

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Preliminary
OZ9RR
Change Summary
CHANGES
No. Applicable Section
Description
Page(s)
1. Application Circuit Figs. 2 & 3 Add reference note.
3, 4
Correct a) ‘Operating Frequency on DRV1 & 2 Pin’ Min.,
2. Functional Specifications
Typ. and Max. limits, b) ‘LPWM Frequency’ Min. and Typ.
limits, c) ‘Ignition Time’ parameter title, and d) ‘Lamp
6
Current Reference’ parameter title and unit.
3. Functional Description, 4.
4. Functional Description, 5.
NT5. Functional Description, 8.
ME6. Functional Description, 9.
U7. Functional Description, 9.
C Y8. Throughout data sheet
DO OP 335 ngREVISION HISTORY
LLED OT C 2003 inyaRevision No.
NDARCSEPOELLRNEEITAAARSSLMOEENDRDU.TOMCOhBNeCEnhRaF0ne5gnsghOuNYLY0.90 Initialrelease
Last sentence, add “CT” pin number.
Last sentence, add “pin 2” name, and correct formula.
4th line, correct to read “….voltage at the CCFL for
approximately two seconds.”
3rd paragraph, 5th line, correct to read “….is set by
external capacitors C9 and C11 connected to CT (Pin
2)”, deleting “.., CT (Pin 2)” from the following sentence.
4th paragraph, correct formula and add last sentence.
Miscellaneous corrections.
7
7
7
7, 8
8
---
Description of change
Release Date
03/27/03
05/07/03
Copyright 2003 by O2Micro
OZ9RR-DS-0.95
All Rights Reserved
U.S. Patent #6,559,606




O2Micro

OZ9RR Datasheet Preview

OZ9RR Datasheet

LCD Monitor CCFL Inverter Controller

No Preview Available !

Preliminary
OZ9RR
LCD Monitor CCFL Inverter Controller
FEATURES
Low cost LCD monitor inverter solution
The OZ9RR offers a high level of integration,
Constant operating frequency
while maintaining flexibility and high-efficiency
Operating frequency can be synchronized
with external signal
TIntegrated synchronized PWM dimming
Ncontrol with wide dimming range
EBuilt-in intelligence for ignition and normal
Moperation of CCFLs
UBuilt-in open-lamp protection and over-
voltage protection
C YOptimized soft-start function
DO OP 35 gHigher reliability and longer life
3 nSupports multiple CCFLs
ED T C 03 yaMinimum external components
OLL NO 0520 u YinORDERING INFORMATION
NTR DO ER sh YOZ9RRG – 8 pin plastic SOIC
g LOZ9RRD – 8 pin plastic DIP
CO ASE UMB han g ONGENERAL DESCRIPTION
DA LE N C enThe patent pending OZ9RR is a cost-effective
N P L O FCCFL (Cold Cathode Fluorescent Lamp) Power
IA T nManagement controller designed for multiple
R D eCCFL LCDM (Liquid Crystal Display Monitor)
E E happlications.
S AS . COZ9RR operates at a constant operating
frequency. The operating frequency can be
E Rsynchronized with an external signal that
L Meliminates any undesired interference between
REthe controller and LCD panel.
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.
Operating in a zero-voltage switching, push-pull
topology, the OZ9RR achieves high power
conversion efficiency. 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 application requires a minimum number of
off-the-shelf components.
The CCFL backlight controller is designed for a
wide range of input voltages. It provides a wide
dimming range by converting an external analog
control input into a built-in LPWM dimming
function. The controller converts unregulated DC
voltages into a nearly sinusoidal lamp voltage
and current waveforms.
The OZ9RR is available in 8-pin SOIC and 8-pin
PDIP packages.
OZ9RR is specified over the commercial
temperature range from 0oC to 70oC.
The controller provides a wide dimming range
control with 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.
05/07/03
Copyright 2003 by O2Micro
OZ9RR-DS-0.95
All Rights Reserved
Page 1
U.S. Patent #6,559,606


Part Number OZ9RR
Description LCD Monitor CCFL Inverter Controller
Maker O2Micro
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