LX1692 Ver la hoja de datos (PDF) - Mitsumi

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componentes Descripción

Fabricante

LX1692

Full Bridge Resonant CCFL Controller

Mitsumi 

LX1692

TM

®

Full Bridge Resonant CCFL Controller

PRODUCTION DATA SHEET

ELECTRICAL CHARACTERISTICS (CONTINUED)

Unless otherwise specified, the following specifications apply over the operating ambient temperature -20°C ≤ TA ≤ 70°C except where

otherwise noted and the following test conditions:.

Parameter

` BIAS BLOCK

Symbol

Test Conditions

LX1692

Units

Min Typ Max

Voltage at Pin I_R

V_IR

I_R = 40K

1.0

V

Pin I_R Max Source Current

` STRIKING BLOCK

IMAX_IR

75

µA

ISNS Input Strike Threshold

VISNS_STK

1.0

Vpk

Min ISNS Input Threshold

VISNSMIN

0.3

Vpk

Lamp current Regulation Reference

Voltage During Strike Period

VREF_STK

2

V

Number of Zero Crossing Signal

Delay Steps During Strike

NSTEP

128

Steps

Number of Pulses Zero Crossing

Signal per Step During Strike

NPS

8

Pulses

Initial Delay Time

TFDLY

3.6

µs

Last Delay Time

TLDLY

After 128 steps

0.3

us

OVSNS Zero Comparator HIGH

VOVZH

0.843

V

OVSNS zero Comparator LOW

VOVZL

-0.443

V

OVSNS Peak Comparator High

VOVPH

2.13

V

OVSNS Peak Comparator Low

` PROTECTION

VOVPL

-1.73

V

Open Lamp Detection Enable

Threshold

VFEN

3.5

V

Over Voltage Detection Threshold

VOVSTH

3.2

V

Over Current Detection Threshold

Open Lamp Striking Time Out

VOCTH

2.0

V

TSTKO

4.5V > VDDP < 5.5V, ISNS = 0V, , C_TO = 1µF,

I_R = 40K, VC_TO > 3.5V

1.2

1.4

1.6

sec

Open Lamp Time Out ( After Ignition) TOL

VISNS < 0.3V, VC_TO >3.5V,

Lamp Freq = 60Khz

2.1

msec

Short Lamp/Over Current Detection

Enable Threshold

VDCOD

4.5V > VDDP < 5.5V, ISNS = 0V, C_TO = 1µF,

I_R = 40K

0.7

V

Over Current Time Out

TOC

VOC_SNS >2.0V, Lamp Freq = 60Khz

500

µsec

Short Lamp Time Out (Strike)

Short Lamp Time Out (Run)

TSL_STK

TSL_RUN

VOV_SNS < 0.5V, VISNS < 1V

VOV_SNS < 0.5V, VISNS > 0.3V

135

msec

500

µsec

Over Voltage Time Out

TOSL

VOV_SNS > 3.2V, pulsed input

16

count

Copyright © 2004

Rev. 1.1, 2/9/2006

Microsemi

Integrated Products Division

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

Page 6

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