LX1691
Enhanced Multi-Mode CCFL Controller
®
TM
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS (CONTINUED)
LX1691
Typ
Parameter
Symbol
Test Conditions
Units
Min
Max
DIGITAL DIMMER BLOCK
`
Minimum Duty Cycle; BRITE_IN = 0.1V
Maximum Duty Cycle; BRITE_IN =1.90V
Maximum Duty Cycle; BRITE_IN ≥ 2.05V
Maximum Duty Cycle; BRITE_IN = 0.0V
Maximum Duty Cycle; BRITE_IN = 0.1V
Minimum Duty Cycle; BRITE_IN = 1.95V
2
90
100
100
90
2
5
7
%
%
%
%
%
%
Conventional Dimming
Duty Cycle
95
100
Reverse Dimming
Duty Cycle
95
5
100
7
TIMING GENERATOR BLOCK
`
Number of Lamp Return Current
Cycles before Run Mode
NIGNITE
To switch to Run Mode
4
Cycles
I_SNS Run Mode Checking Interval
Strike Validation Threshold
Lamp return current cycles
2048
700
Cycles
mVPK
mVPK
To switch to run mode, TA =25°C
I_ SNS Open Lamp Fault Detect, TA =25°C
Fault Comparator Threshold Run
300
Number of Strike sweep Attempts
Before Fault Shutdown
NSTRK_FAULT FLAMP Sweep Cycles, I_SNS = 0V_SNS = 0V
6
Power On Delay Before Strike
TD_PWRON
I_R = 80.6K
125
512
ms
Number of Sweeping Strike Frequency
Steps per Attempt
Steps
Number of Output Pulses per Striking
Step
16
Cycles
LAMP FEEDBACK CONDITIONING BLOCK
`
I_SNS = +2.5V
14
-40
µA
µA
VPK
VPK
µA
µA
VPK
VPK
µA
µA
V
I_SNS Input Current
I_SNSIIN
I_SNS = -2.5V
OV_SNS Input High Threshold
OV_SNS Input Low Threshold
VTH_OV_SNS Active Over Voltage Protection
VTL_OV_SNS Inactive Over Voltage Protection
± 2.2
± 1.8
140
-170
± 2.2
± 1.8
14
OV_SNS = +2.5V
OV_SNSIIN
OV_SNS Input Current
OV_SNS = -2.5V
OC_SNS Input High Threshold
OC_SNS Input Low Threshold
VTH_OC_SNS Active Over Current Protection
VTL_OC_SNS Inactive Over Voltage Protection
OC_SNS = 10V
OC_SNSIIN
OC_SNS Input Current
OC_SNS = -2.5V
-40
I_SNS = 0.3VDC, TA = 25°C
0.3
I_SNS = 2.5VDC, TA = 25°C
I_SNSRMS
2.5
V
Full Wave Rectifiers RMS Transfer
I_SNS = -0.3VDC, TA = 25°C
0.3
V
I_SNS = -2.5VDC, TA = 25°C
2.5
V
Copyright © 2003
Rev. 1.0, 7/16/2004
Microsemi
Page 7
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
MICROSEMI [ Microsemi ]
