LXM1620-01 データシートの表示（PDF） - Microsemi Corporation

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LXM1620-01

DIRECT DRIVE DUAL LAMP CCFL INVERTER MODULE

Microsemi Corporation 

PRODUCT DATABOOK 1996/1997

LXM1620-01

DIRECT DRIVE DUAL LAMP CCFL INVERTER MODULE

NOT RECOMMENDED FOR NEW DESIGN

SEE LXM1624-12-61

DIRECT DRIVE OUTPUT ARCHITECTURE

Direct Drive architecture includes two load feedback control loops to

provide uncompromised CCFL ignition and operation characteristics.

Lamp current is regulated in the CCFL return lead (I loop) to insure

SNS

constant light output with changing lamp parameters and power supply

voltage. This also allows accurate and repeatable brightness control.

Dimming ratio with the LX1620 analog dimming inverters is typically 6:1

when driving dual LCD lamp panels.

If no current flows in the CCFL return path because of an unstruck or

failed lamp, the inverter applies full strike voltage potential. The output

voltage feedback loop (VSNS) takes control and regulates output voltage to

1650V . This insures the lamp will ignite under worst case temperature

RMS

and aging conditions.

Because output voltage is actively regulated, it will never exceed

component and panel insulation ratings. This prevents destructive corona

discharge to insure long term reliability of the system.

High Voltage

Transformer

VHI1

SLEEP

BRITE

Controller

Transformer

Driver

GND

VSENSE

ISENSE

VLO

FIGURE 3 — LXM1620 Block Diagram

(Only one lamp shown)

5.0VDC

TYPICAL APPLICATIONS

10.8VDC- 16VDC

£ 10k

5V

0V

BRITE

VIN

VHI2

VHI1

LXM1620-xx

SLEEP

GND

VLO

FIGURE 4 — Potentiometer Brightness Control

PRELIMINARY DATA - Information contained in this document is pre-production data, and is proprietary to LinFinity. It may not modified

in any way without the express written consent of LinFinity. Product referred to herein is offered in sample form only, and Linfinity reserves

the right to change or discontinue this proposed product at any time.

Copyright © 2000

Rev. 0.11 12/03

5

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