LX1689 Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1689 Datasheet PDF : 14 Pages
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LX1689
TM
®
Third Generation CCFL Controller
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS (CONTINUED)
Parameter
Symbol
Test Conditions
` ANALOG DIMMER BLOCK
BRITE_IN Input Current
Conventional Dimming
BRITE_OUT
BRITE_IN II BRITE_IN = 0 to 5V
BRITE_IN < 0.45V
BRITE_IN > 2.05V; TA = 25°C
BRITE_IN > 2.05V
Reverse Dimming
BRITE_OUT
` DIGITAL DIMMER BLOCK
BRITE_IN < 0.45V; TA = 25°C
BRITE_ IN < 0.45V
BRITE_IN > 2.05V
Conventional Dimming
Duty Cycle
Minimum Duty Cycle; BRITE_IN ≤ 0.55V
Maximum Duty Cycle; BRITE_IN =1.90V
Maximum Duty Cycle; BRITE_IN ≥ 1.95V
Reverse Dimming
Duty Cycle
` TIMING GENERATOR BLOCK
Maximum Duty Cycle; BRITE_IN ≤ 0.55V
Maximum Duty Cycle; BRITE_IN = 0.6V
Minimum Duty Cycle; BRITE_IN ≥ 1.95V
Number of Lamp Return Current
Cycles before Run Mode
NIGNITE To switch to Run Mode
I_SNS Run Mode Checking Interval
Lamp return current cycles, 8192 x 1 /fO
Fault Comparator Threshold Voltage
Number of Strike sweep Attempts
Before Fault Shutdown
I_ SNS Open Lamp Fault Detect, TA =25°C
NSTRK_FAULT FLAMP Sweep Cycles, I_SNS = 0V_SNS = 0V
Power On Delay Before Strike
TD_PWRON
Number of Sweeping Strike Frequency
Steps per Attempt
Number of Output Pulses per Striking
Step
` LAMP FEEDBACK CONDITIONING BLOCK
16384 X Lamp Run Period
I_SNS Input Current
I_SNS =10V
I_SNSIIN
I_SNS = -10V
OV_SNS Input High Threshold
VTH_OV_SNS Active Over Voltage Protection
OV_SNS Input Low Threshold
OV_SNS Input Current
VTL_OV_SNS
OV_SNSIIN
Inactive Over Voltage Protection
OV_SNS = 10V
OV_SNS = -10V
OC_SNS Input High Threshold
OC_SNS Input Low Threshold
OC_SNS Input Current
VTH_OC_SNS
VTL_OC_SNS
OC_SNSIIN
Active Over Current Protection
Inactive Over Voltage Protection
OC_SNS = 10V
OC_SNS = -10V
Full Wave Rectifiers RMS Transfer
I_SNSRMS
I_SNS = 0.3VDC, TA = 25°C
I_SNS = 2.0VDC, TA = 25°C
I_SNS = -0.3VDC, TA = 25°C
I_SNS = -2.0VDC, TA = 25°C
LX1689
Units
Min Typ Max
-1
1
µA
20
52
100 mV
0.96 1.04 1.12
V
0.94 1.04 1.14
V
0.98 1.06 1.14
V
0.96 1.06 1.16
V
10
62
120 mV
2
10
15
%
85
92
100
%
100
%
100
%
85
92
100
%
2
10
15
%
8
Cycles
126
mS
250
305
350 mVPK
15
252
ms
1024
Steps
16
Cycles
80
150
µA
-200 -350 µA
±2
± 2.2
VPK
± 1.8 ± 2
VPK
260
400
µA
-320 -450 µA
±2
± 2.2
VPK
± 1.8 ± 2
VPK
45
80
µA
-110 -180 µA
0.27 0.31 0.35
V
1.95
2
2.05
V
0.24 0.3 0.36
V
1.75 1.9 2.05
V
Copyright © 2000
Rev. 1.1, 2006-02-27
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
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