OZ960SN datasheet(1/12 Pages) O2MICRO

部件名	OZ960SN

功能描述	Intelligent CCFL Inverter Controller

PDF	12 Pages

Scroll/Zoom	100%

制造商	O2MICRO [O2Micro International Limited.]

网页	http://www.o2micro.com/

标志

1 / 12 page

OZ960

10/23/01

OZ960-DS-1.6

Page 1

2Micro

U.S. Patent #6,259,615

Intelligent CCFL Inverter Controller

FEATURES

•

Supports

wide-range

voltage

input

applications (8v to 20v)

•

Built-in intelligence to manage ignition and

normal operation of CCFLs

•

Reduces the number of components and

board

size

by

30%

compared

with

conventional designs

•

85% efficiency vs. typical 70% efficiency of

conventional designs

•

Zero-voltage-switching full bridge topology

•

Built-in internal open-lamp and over-voltage

protections

•

Integrated burst mode control, and wide

dimming

range

(10%

to

100%)

with

integrated burst mode control

•

Supports multiple CCFL lamps

•

Simple and reliable 2-winding transformer

design

•

Constant-frequency

design

eliminates

interference with LCDs

•

Low stand-by power

ORDERING INFORMATION

OZ960S - 20-pin plastic SSOP 150mil

OZ960IS - 20-pin plastic SSOP 150mil

OZ960G - 20-pin plastic SOP 300mil

OZ960IG - 20-pin plastic SOP 300mil

OZ960D - 20-pin plastic DIP 300mil

OZ960ID - 20-pin plastic DIP 300mil

GENERAL DESCRIPTION

The OZ960 is a unique, high-efficiency, Cold

Cathode Fluorescent Lamp (CCFL) backlight

inverter controller that is designed for wide input

voltage inverter applications. Additionally, the

OZ960 performs the lamp dimming function with

an analog voltage or low frequency Pulse Width

Modulation (PWM) control.

Operating Principle:

Operating in a zero-voltage switching, full-bridge

configuration, the inverter circuit achieves a very

high efficiency power conversion. In addition, the

transformer in the OZ960 does not require any

specific gap-less arrangement. The simple, low

cost transformer provides designers a high

degree

of

design

flexibility

in

specifying

transformers. Setting the switching frequency

higher than the resonant frequency of a high-

quality-factor resonant tank circuit yields a good-

quality waveform received, at the CCFL voltage

and current.

The OZ960 operates at a single, constant

frequency in a phase-shift PWM mode. Intelligent

open-lamp and over-voltage protections provide

design

flexibility

so

various

transformer

models/manufacturers may be used. The built-in

burst mode control provides a wide dimming

range

and

simplifies

the

application

circuit

designs.

Both

operating

and

burst-mode

frequencies are user-programmable parameters.

The single stage design results in a low cost,

reliable

transformer

without

expensive,

less

reliable

secondary

fold-back

treatment.

The

transformer does not require a more expensive

center tapped primary.

The OZ960 is available in a 20-pin SSOP

package. It is specified over the commercial

temperature range of 0

°C to +70°C, and the

industrial temperature range of -40

°C to +85°C.

FUNCTIONAL BLOCK

DIAGRAM

Refer to the functional block diagram in Figure 2,

page 3, and the Pin Description Table on page 4.

A precision reference provides a reference

voltage for both internal and external uses. An

oscillator circuit generates a user-programmable

operating frequency with an external capacitor

and a timing resistor. In addition, another resistor

to program striking frequency is provided. The

drive circuit consists of four outputs. These are

designed to achieve zero-voltage switching, full-

bridge applications. An error amplifier is provided

to regulate the CCFL current. The Soft-start

circuit offers a gradual increase of the power to

the CCFL during the ignition period. The over-

voltage

protection

block

offers

a

regulated

striking voltage for CCFLs. The striking time is

programmable

simply

through

an

external

component.

The

open-lamp

protection

is

integrated in the protection block. This block

intelligently differentiates the striking condition

and open-lamp condition. ENA circuitry enables

the operation of the IC through a TTL signal

interface.

Wide-dimming control is achieved

through the burst-mode control block.

类似零件编号 - OZ960SN

制造商	部件名	数据表	功能描述
List of Unclassifed Man...	OZ960S	244Kb / 12P	Intelligent CCFL Inverter Controller

More results

类似说明 - OZ960SN

制造商	部件名	数据表	功能描述
Applied Concepts Inc.	AC2-12-1049	152Kb / 1P	CCFL INVERTER
	AC2-A1-1576	1Mb / 2P	CCFL INVERTER
	AC3-12-1772	1Mb / 2P	CCFL INVERTER
	AC5-12-1017	172Kb / 1P	CCFL INVERTER
	AC5-12-1077	165Kb / 1P	CCFL INVERTER
	AC5-12-1156	102Kb / 1P	CCFL INVERTER
	AC5-12-1164	168Kb / 1P	CCFL INVERTER
	AC5-12-1357	92Kb / 1P	CCFL INVERTER
List of Unclassifed Man...	OZ960	244Kb / 12P	Intelligent CCFL Inverter Controller
List of Unclassifed Man...	OZ9936	181Kb / 11P	OZ9936 / LCD Monitor CCFL Inverter Controller