Datasheet > 电源电路 > 开关式稳压器或控制器> LX1688CPW

LX1688CPW

更新时间： 2024-11-10 22:46:51

品牌	Logo	应用领域
美高森美 - MICROSEMI		控制器
页数	文件大小	规格书
15页	625K
描述
MULTIPLE LAMP CCFL CONTROLLER

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中文翻译

获取价格

数据手册
替代型号

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LX1688CPW 数据手册

RangeMAX™

LX1688

I N T E G R A T E D P R O D U C T S

MULTIPLE LAMP CCFL CONTROLLER

KEY FEATURES

DESCRIPTION

Provision to synchronize lamp

current & frequency with other

controllers

The LX1688 is a fixed frequency, generation technique.

dual current/voltage mode, switching

regulator that provides the control

function for Cold Cathode Fluorescent

Lighting (CCFL). This controller can

be used to drive a single lamp, but is

specifically designed for multiple lamp

LCD panels. The IC can be configured

as a master or slave and synchronize up

to 12 controllers.

Safety and reliability features

include a dual feedback control loop that

permits regulation of maximum lamp

strike voltage as well as lamp current.

Regulating maximum lamp voltage

permits the designer to provide for ample

worst-case lamp strike voltage while

conservatively limiting maximum open

circuit voltage. In addition the controller

Dimming with analog or digital

(PWM) methods (>20:1)

Programmable Fixed frequency

Adjustable Power-up reset

ENABLE/BRITE Polarity Selection

Voltage limiting on step-up

transformer secondary winding

Open lamp timeout circuitry

Switched VDD output (10mA)

Micro-Amp Sleep Mode

The LX1688 includes highly features include auto shutdown for an

integrated universal ‘PWM or DC’ open or broken lamp, and a lamp fault

dim input that allows either a PWM or detection with a status reporting output.

Operates with 3.3V to 5V Supply

100mA output drive capability

DC input to adjust brightness without

requiring external conditioning, since a

single external capacitor CPWM can

be used to integrate a PWM input.

Burst mode dimming is possible if the

user supplies a low frequency PWM

signal on the BRITE input and no

CPWM capacitor is used. The

controller utilizes Linfinity’s patented

direct drive fixed frequency topology

and patented resonant lamp strike

To improve design flexibility the IC

includes the ability to select the polarity

of both the chip enable and dim (BRITE)

inputs. Also included is a switched VDD

output of up to 10mA that will allow the

user to power other circuitry that can be

switched on and off with the inverters

enable input. This preserves the micro

power sleep mode with no additional

components.

APPLICATIONS/BENEFITS

Desktop LCD Monitors

Multiple lamp panels

Low Ambient Light Displays

High Efficiency

Lower Cost than Conventional

Buck/Royer Inverter Topologies

Improved Lamp Strike Capability

Improved Over-Voltage Control

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com

PRODUCT HIGHLIGHT

DIM M ING (BRITE)

ENABLE

LAM PS

IN PUT

CO NNECTO R

LX1688

M ASTER

STRIKE

STATUS

125 Hz 5% Duty cycle Burst

65KHz run frequency

FAULT

BRITE

ENABLE

LX1688

SLAVE

STRIKE

STATUS

VDD

FAULT

Ch3

Ch2

100µs

10.0mV Ω

Simplified quad lamp inverter showing synchronized output waveforms

PACKAGE ORDER INFO

Plastic TSSOP

24-Pin

MIN V_DD

MAX V_DD

T_J(°C)

0 to 70

-40 to 85

3.0V

5.5V

LX1688CPW

LX1688IPW

Rev. 1.1a, 2003-03-21

Microsemi

Page 1

Integrated Products, Power Management

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

12 3 4 5 6 7...15

中文翻译

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LX1688CPW 替代型号

型号	品牌	替代类型	描述	数据表
LX1688IPW	MICROSEMI	类似代替	MULTIPLE LAMP CCFL CONTROLLER

与LX1688CPW相关器件

型号	品牌	获取价格	描述	数据表
LX1688CPW-TR	MICROSEMI	获取价格	Multiple Lamp CCFL Controller
LX1688IPW	MICROSEMI	获取价格	MULTIPLE LAMP CCFL CONTROLLER
LX1688IPW-TR	MICROSEMI	获取价格	Multiple Lamp CCFL Controller
LX1689	MICROSEMI	获取价格	Third Generation CCFL Controller
LX1689_06	MICROSEMI	获取价格	Third Generation CCFL Controller
LX1689CPW	MICROSEMI	获取价格	Third Generation CCFL Controller
LX1689CPWT	MICROSEMI	获取价格	Fluorescent Light Controller, 500kHz Switching Freq-Max, BICMOS, PDSO20, PLASTIC, TSSOP-20
LX1689IPW	MICROSEMI	获取价格	Third Generation CCFL Controller
LX1689IPWT	MICROSEMI	获取价格	Fluorescent Light Controller, 500kHz Switching Freq-Max, BICMOS, PDSO20, PLASTIC, TSSOP-20
LX1689IPW-TR	MICROSEMI	获取价格	暂无描述

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