Document
Recipient #104135 printed on 6/24/2005. This is a ONE-TIME copy. Updates will not be provided.
OZ9936
Change Summary
CHANGES
No 1 Applicable Section Footer Description Added patent numbers Page(s) 0
REVISION HISTORY
Revision No. 0.90 1.0 Description of change Initial release Features: 1. Add ‘Built-in intelligence to ignite positive impedance
CCFLs; 2. Add ‘Shutdown delay for input brownout condition’; 3. Delete ‘Tight parameter tolerance’ General Description: 1. Add ‘OZ9936 drives all types of CCFLs and is able to ignite positive impedance CCFLs. OZ9936 provides a shutdown delay feature for input brownout condition.’ after ‘OZ9936 operates at a constant…’. 2. Move the paragraph ‘The OZ9936 provides two drive…’ nd to the 2 paragraph
Release Date 09/09/04 03/09/05
Electrical Specifications: a. Update ‘Supply Current’ Max limits; b. Update ‘Soft Start Current Source’ Typ & Max limits; c. Update ‘Under Voltage Lockout’ Min, Typ & Max limits; d. Update ‘ENA_SST_CMP Pin – Low’ Max limit; e. Update Operating Frequency on DRV1 & DRV2 Pin’ Min, Typ & Max limits & Temperature Coefficient; f. Update ‘Duty Cycle on DRV1 & DRV2 (active high)’ Max limit; g. Update ‘Ignition Time’ Min & Max limits; h. Add ‘Open Lamp Shutdown Delay Time’ parameters; i. Update ‘V1(ENA_SST_CMP Pin) Threshold’ Min limit; j. Update ‘Drivers’ Typ & Max limits; k. Update ‘Analog Dimming Control’ Min, Typ & Max limits; l. Update ‘External PWM Dimming Control’ Min, Typ & Max limits and add temperature coefficient. Functional Description: Modify No. 7. Open Lamp Protection. Throughout data sheet: Miscellaneous corrections.
04/06/05 Copyright © 2003-2005 by O2Micro
OZ9936-DS-1.1 All Rights Reserved CONFIDENTIAL
Page 0 U.S. Patents #6,559,606 #6,856,519 #6,809,938 #6,804,129
Free Datasheet http://www.datasheet4u.net/
Recipient #104135 printed on 6/24/2005. This is a ONE-TIME copy. Updates will not be provided.
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 overvoltage 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 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 overvoltage 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.
ORDERING INFORMATION
Part Number OZ9936G OZ9936GN OZ9936IG OZ9936IGN OZ9936D OZ9936DN Temp Range o o 0 C to 70 C
o o 0 C to 70 C
-40oC to 85oC -40oC to 85oC
o o 0 C to 70 C o o 0 C to 70 C
Package 8-pin SOIC 8-pin SOIC, Leadfree 8-pin SOIC 8-pin SOIC, Leadfree 8-pin PDIP 8-pin PDIP, Leadfree
PIN DIAGRAM
1 2 ENA_SST_CMP RT GNDA DRV2 ISEN DIM VDDA DRV1 8 7 6 5
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.
3 4
TYPICAL OPERATING CIRCUIT
04/06/05 Copyright ©2003-5 by O2Micro
OZ9936-DS-1.1 All Rights Reserved CONFIDENTIAL
Page 1
Free Datasheet http://www.datasheet4u.net/
Recipient #104135 printed on 6/24/2005. This is a ONE-TIME copy. Updates will not be provided.
OZ9936
PIN DESCRIPTION
Names ENA_SST_CMP RT GNDA DRV2 DRV1 VDDA DIM ISEN Pin No. 1 2 3 4 5 6 7 8 Description Enable, Soft Start Time and Compensation.