LX1691
TM
®
Enhanced Multi-Mode CCFL Controller
P
RODUCTION
D
ATA
S
HEET
ELECTRICAL CHARACTERISTICS (CONTINUED)
Parameter
DIGITAL DIMMER BLOCK
Conventional Dimming
Duty Cycle
Minimum Duty Cycle; BRITE_IN = 0.1V
Maximum Duty Cycle; BRITE_IN =1.90V
Maximum Duty Cycle; BRITE_IN
≥
2.05V
Reverse Dimming
Duty Cycle
TIMING GENERATOR BLOCK
Number of Lamp Return Current
Cycles before Run Mode
I_SNS Run Mode Checking Interval
Strike Validation Threshold
Fault Comparator Threshold Run
Number of Strike sweep Attempts
N
STRK_FAULT
Before Fault Shutdown
Power On Delay Before Strike
T
D_PWRON
Number of Sweeping Strike Frequency
Steps per Attempt
Number of Output Pulses per Striking
Step
LAMP FEEDBACK CONDITIONING BLOCK
I_SNS Input Current
OV_SNS Input High Threshold
OV_SNS Input Low Threshold
OV_SNS Input Current
OC_SNS Input High Threshold
OC_SNS Input Low Threshold
OC_SNS Input Current
I_SNS
IIN
V
TH_OV_SNS
V
TL_OV_SNS
OV_SNS
IIN
V
TH_OC_SNS
V
TL_OC_SNS
OC_SNS
IIN
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
95
5
100
7
5
95
7
100
%
%
%
%
%
%
WWW .
Microsemi
.C
OM
Symbol
Test Conditions
Min
LX1691
Typ
Max
Units
N
IGNITE
To switch to Run Mode
Lamp return current cycles
To switch to run mode, T
A
=25°C
I_ SNS Open Lamp Fault Detect, T
A
=25°C
FLAMP Sweep Cycles, I_SNS = 0V_SNS = 0V
I_R = 80.6K
4
2048
700
300
6
125
512
16
Cycles
Cycles
mV
PK
mV
PK
ms
Steps
Cycles
I_SNS = +2.5V
I_SNS = -2.5V
Active Over Voltage Protection
Inactive Over Voltage Protection
OV_SNS = +2.5V
OV_SNS = -2.5V
Active Over Current Protection
Inactive Over Voltage Protection
OC_SNS = 10V
OC_SNS = -2.5V
I_SNS = 0.3VDC, T
A
= 25°C
I_SNS = 2.5VDC, T
A
= 25°C
I_SNS = -0.3VDC, T
A
= 25°C
I_SNS = -2.5VDC, T
A
= 25°C
14
-40
± 2.2
± 1.8
140
-170
± 2.2
± 1.8
14
-40
0.3
2.5
0.3
2.5
µA
µA
V
PK
V
PK
µA
µA
V
PK
V
PK
µA
µA
V
V
V
V
Full Wave Rectifiers RMS Transfer
I_SNS
RMS
E
LECTRICALS
E
LECTRICALS
Copyright
©
2003
Rev. 1.0, 7/16/2004
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
MICROSEMI [ MICROSEMI CORPORATION ]
