Datenblatt-pdf.com


OZ9960 Schematic ( PDF Datasheet ) - O2Micro

Teilenummer OZ9960
Beschreibung (OZ99xx) Intelligent Lighting
Hersteller O2Micro
Logo O2Micro Logo 




Gesamt 30 Seiten
OZ9960 Datasheet, Funktion






OZ9960 Datasheet, Funktion
OZ9938
FEATURES
• Positive 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 lamp ignition and normal operation of CCFLs
• Open-lamp and over-voltage protection
• Soft start function
GENERAL DESCRIPTION
The OZ9938 is a high performance, cost-effective Cold Cathode Fluorescent Lamp
(CCFL) controller designed to drive large-size LCD applications requiring 2 to 6
CCFLs.
This controller converts an unregulated DC voltage into a nearly sinusoidal lamp volt-
age and current waveforms. It provides two drive signals for most power conversion
topologies, while maintaining high efficiency operation.
The OZ9938 offers a high level of integration, while maintaining flexibility and high
efficiency operation that reduces external component heating. This results in higher
reliability and longer CCFL life. The proprietary design technique provides a simple,
low-cost system solution.
APPLICATIONS
• LCD Monitor
APPLICATION DIAGRAM
OZ9928
FEATURES
• Dual CCFL inverter controller
• Synchronization for multiple ICs
• Supports differential drive
• Supports system operation frequency synchronization
• Constant operating frequency
• 180 degree phase-shift PWM dimming
• Mixed-mode dimming control
• Integrated high side N-MOSFET driver
• High drive capability
• Selectable shutdown protection mode
• User-defined ignition and shutdown delay timers
• Built-in intelligence for lamp ignition and normal operation of CCFLs
• Open-lamp and over-voltage protection
• Soft start function
GENERAL DESCRIPTION
The OZ9928 is a high performance, cost-effective, 2-channel controller designed for
large-size Cold Cathode Fluorescent Lamp (CCFL) or External Electrode Fluorescent
Lamp (EEFL) LCD TV applications.
The controller provides six drive signals and is capable of driving full-bridge and
Class-D topologies. The drive outputs are fixed phase when used for single-side or
differential drive applications. Multiple OZ9928s can be synchronized to drive numer-
ous lamps.
OZ9928 provides total system protection for differential drive and single-side drive
applications. It receives either a DC voltage and/or external Pulse Width Modulation
(PWM) signal to perform mixed-mode PWM dimming.
APPLICATIONS
• LCD TV
APPLICATION DIAGRAM
U.S. Patent #’s 6,104,146; 6,259,615; 6,396,722; 6,559,606; 6,804,129; 6,809,938; 6,856,519; 6,897,698; 6,900,993; 7,095,392;
7,120,035; 7,151,394; 7,233,117; 7,372,213; 7,394,209; 7,417,382; 7,515,445; 7,515,446; 7,777,425; and more patents pend-
ing.
10
U.S. Patent #’s 6,104,146; 6,259,615; 6,396,722; 6,501,234; 6,570,344; 6,707,264; 6,781,325; 6,804,129; 6,897,698; 6,936,975;
7,075,245; 7,095,392; 7,126,289; 7,151,394; 7,190,123; 7,248,240; 7,345,431; 7,394,209; 7,417,382; 7,425,949; 7,477,024;
7,515,445; 7,515,446; 7,550,928; 7,554,273; 7,777,425; and more patents pending.
11

6 Page









OZ9960 pdf, datenblatt
OZ9989
FEATURES
• High frequency DC/DC power converter controller
• Drives up to 3 strings in parallel
• Integrated power MOSFET
• Integrated LED current balance control circuit
• Fixed 1.3MHz switching frequency
• External PWM dimming
• MOSFET over-current protection
• Over-current protection for each string
• Output short circuit detection
• Open diode, over-voltage and thermal protection
• Soft start function
GENERAL DESCRIPTION
OZ9989 is a high efficiency, DC/DC controller with an integrated power MOSFET that
drives up to three strings of LEDs connected in parallel configuration; with multiple
LEDs in each string connected in series. It is targeted for netbook backlight applica-
tions.
The IC provides three (3) LED current sense inputs in an “OR” configuration for
improved backlight reliability. This allows the backlight to remain functioning in the
event that any string (s) is damaged during normal operation.
OZ9989 uses an external Pulse Width Modulation (PWM) signal for the dimming
control function.
APPLICATIONS
• Netbook Computer
• PND
APPLICATION DIAGRAM
OZ9993
FEATURES
• High frequency DC/DC boost converter controller
• Supports a single cell LiIon battery
• Fixed 900kHz switching frequency
• Integrated power MOSFET with over-current protection
• Open diode, over-voltage, and output short circuit protection
• Thermal protection
• Soft start function
GENERAL DESCRIPTION
OZ9993 is a high efficiency, DC/DC controller with an integrated power MOSFET that
drives one string of LEDs. It provides the user with a low cost solution that requires
minimum components for the boost regulator and is suitable for applications requir-
ing a single cell Lithium Ion battery.
A soft start feature is provided to minimize in-rush current during start-up.
APPLICATIONS
• Netbook
• PND
• Camcorder
APPLICATION DIAGRAM
U.S. Patent #7,498,793; 7,847,783; and more patents pending.
22
U.S. Patent #7,498,793; 7,847,783; and more patents pending.
23

12 Page





SeitenGesamt 30 Seiten
PDF Download[ OZ9960 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
OZ9960(OZ99xx) Intelligent LightingO2Micro
O2Micro
OZ9961(OZ99xx) Intelligent LightingO2Micro
O2Micro
OZ9965(OZ99xx) Intelligent LightingO2Micro
O2Micro
OZ9966High performance controllerETC
ETC
OZ9966(OZ99xx) Intelligent LightingO2Micro
O2Micro

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche