LX1689IPW Microsemi Analog Mixed Signal Group, LX1689IPW Datasheet

LX1689IPW

Manufacturer Part Number

LX1689IPW

Description

IC CTLR CCFL BACKLIGHT 20-TSSOP

Manufacturer

Microsemi Analog Mixed Signal Group

Type

CCFL Controllerr

Datasheet

1.LX1689CPW.pdf (14 pages)

Specifications of LX1689IPW

Frequency

63 ~ 67 kHz

Current - Supply

5.5mA

Current - Output

100mA

Voltage - Supply

3 V ~ 28 V

Operating Temperature

-40°C ~ 85°C

Package / Case

20-TSSOP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

LX1689IPWTR

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LX1689IPW

Manufacturer:

MSC

Quantity:

1 882

Current page: 1 of 14
Download datasheet (297Kb)

Rev. 1.1, 2006-02-27

Direct Drive CCFL (Cold Cathode

Fluorescent Lamp) Controller. It uses

new circuit design techniques (patents

pending) and combines digital and linear

circuits with an advanced BiCMOS

process to create a more complete

controller in a small package.

LX1686

applications use from 12 to 30 less

components.

enhancements have been added to make

the LX1689 even easier to use.

synchronize the digital dimming burst

frequency to the video frame rate, as

used in the LX1686, is replaced with a

programmable counter. This counter can

divide the video controller horizontal

sync pulse, other external clock source

or the internal chip clock source to

generate the burst frequency.

IMPORTANT: For the most current data, consult MICROSEMI’s website:

Protected By U.S. Patents: 5,615,093; 5,923,129; 5,930,121; 6,198,234; Patents Pending

*As Shown in Figure 1 (Typical Application)

The LX1689 is the latest generation

When compared to the original

The on-chip PLL circuit used to

Actual Inverter Size

design,

New

Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1689CPW-TR)

-40 to 85

identical

0 to 70

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

1.38in.

functions

(°C)

2.64in.

Actual Inverter Size

(35mm)

D E S C R I P T I O N

(67mm)

module

LX1689 CCFL Inverter Layouts Examples*

and

.870 in.

(22mm)

use of either a DC voltage or a PWM

input to simplify design. Programmable

polarity brightness control is retained,

except in the case of externally clocked

digital dimming.

regulators extend the input voltage range

of the IC up to 28 Volts without using

external circuitry as was required with our

includes a new lamp strike detection

scheme that saves a package pin and three

external components.

monitor lamp current pulses at the I_SNS

input to determine if the lamp strikes and

if it stays ignited once operational.

each of three lamp inputs has significantly

reduced the lamp feedback component

count. In addition the controller features

include auto shutdown for open or broken

lamps, and a lamp fault detection with a

status reporting output.

P R O D U C T H I G H L I G H T

The brightness control input allows the

Integrating full wave rectifiers for

P A C K A G E O R D E R I N F O

Integrated Products

http://www.microsemi.com

Microsemi

controllers.

.397 in

(10mm)

28V

Two onboard LDO

Third Generation CCFL Controller

Internal circuits

The

RoHS Compliant / Pb-free Transition DC: 0442

LX1689

RODUCTION

Plastic TSSOP

20-PIN

LX1689CPW

LX1689IPW

Bill of Materials

ATA

3 to 28 Volt Single Fixed (±20%)

Supply Operating Range

Selectable Analog/Digital

Dimming Modes

Digital Dimming Can Synch to

External Or Internal Clocks

User Programmable Digital

Dimming Burst Frequency

252 mS Power On Delay

Flexible Lamp Current

Compensation Input

Open Lamp Shutdown and Fault

Output Indicator

“On Chip” Full Wave Lamp

Current & Voltage Rectifiers

20 Pin TSSOP Package

Low Component Count /

Module Cost / Size

High “Nits/Watt” Efficiency

Operates Directly From 1 to 6

Li_Ion Cells

Lamp Current Compensation

Input Makes Indoor/Outdoor

And Wide Temperature Range

Applications Easy to Design

LX1689CPW

K E Y F E A T U R E S

Transformer

Total Count

Connectors

Capacitors

Dual FET

Resistors

HEET

B E N E F I T S

LX1689

Page 1

Related parts for LX1689IPW

LX1689IPW Summary of contents

Page 1

... Module Cost / Size High “Nits/Watt” Efficiency Operates Directly From Li_Ion Cells Lamp Current Compensation Input Makes Indoor/Outdoor And Wide Temperature Range Applications Easy to Design Bill of Materials 1 LX1689CPW 1 Transformer 1 Dual FET 2 Connectors 7 Resistors 9 Capacitors 21 Total Count Plastic TSSOP 20-PIN LX1689CPW LX1689IPW Page 1 ...

Page 2

Supply Voltage ( )................................................................................................. 30V V _BATT Digital Input ( ).....................................................................................-0. ENABLE Analog Inputs Transient ...

Page 3

AME Digital Dimming Clock / Dimming Polarity. An input pin that may ...

Page 4

AME BRITE Filter Capacitor and FAULT Output. Used to convert higher frequency ...

Page 5

... Digital Inputs (DIM_MODE, DIV_248,DIM_CLK) Maximum Output Gate Charge ( OUT Unless otherwise specified, the following specifications apply over the operating ambient temperature: LX1689CPW: 0 ° C ≤ ≤ LX1689IPW: -40°C T 85°C, except where otherwise noted. A Test conditions: V_BATT =3 Parameter POWER Regulator Output Voltage ...

Page 6

Parameter RAMP GENERATOR ...

Page 7

Parameter ANALOG DIMMER ...

Page 8

TM V_BATT ENABLE & BIAS ENABLE SLEEP SHUTDOW N VDD_A DUAL LDO VDD_P UVLO BIAS I_R BRITE_IN 2. 75K 0.5V VDD_A FAULT BRITE_C ANADIM BRITE_O UT VDD_A BRITE_R - + I 1 DIM _CLK DIM ...

Page 9

TM C1 100nF 16V V BATT GND BRITE ENABLE BRITE Input Control Range (Linear DC) Min. Brite 'LO' <= 0.50V Max. Brite 'HI' >= 2.00V (2.5V to 3.3V Logic PWM) Min. Brite Pos Duty <= 1.6% Max. Brite Pos Duty ...

Page 10

Page 11

TM On-Chip LDO Regulators Two LDO regulators extend the input voltage range of the Volts without using external circuitry as was required with our previous controllers. Under Voltage Lockout If the battery input voltage is too ...

Page 12

TM LX1689 OPERATION Four operating modes: Power On Delay, Strike, Run, and Fault modes are employed by the LX1689. Upon power up or ENABLE going true, Power On Delay is automatically invoked. Immediately after termination of Power On Delay, or ...

Page 13

TM due to varying input signal amplitude. Input impedance is very high so BRITE_IN can also be driven from a 100K potentiometer with no offset error. BRITE_R and BRITE_OUT Resistor values. The BRITE_OUT pin is the output from the BRITE_IN ...

Page 14

TM PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not ...

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