LX1689
I N T E G R A T E D
P R O D U C T S
Third Generation CCFL Controller
P
RODUCTION
D
ATA
S
HEET
ELECTRICAL CHARACTERISTICS (CONTINUED)
WWW .
Microsemi
.C
OM
Parameter
ANALOG DIMMER BLOCK
BRITE_IN Input Current
Conventional Dimming
BRITE_OUT
Symbol
Test Conditions
Min
-1
20
0.96
0.94
0.98
0.96
10
2
85
100
100
85
2
LX1689
Typ
Max
1
Units
BRITE_IN
II
BRITE_IN = 0 to 5V
BRITE_IN < 0.45V
BRITE_IN > 2.05V; T
A
= 25°C
BRITE_IN > 2.05V
BRITE_IN < 0.45V; T
A
= 25°C
µA
mV
V
V
V
V
mV
%
%
%
%
52
1.04
1.04
1.06
1.06
62
10
92
100
1.12
1.14
1.14
1.16
120
15
100
Reverse Dimming
BRITE_OUT
DIGITAL DIMMER BLOCK
Conventional Dimming
Duty Cycle
BRITE_ IN < 0.45V
BRITE_IN > 2.05V
Minimum Duty Cycle; BRITE_IN
≤
0.55V
Maximum Duty Cycle; BRITE_IN =1.90V
Maximum Duty Cycle; BRITE_IN
≥
1.95V
Maximum Duty Cycle; BRITE_IN
≤
0.55V
Maximum Duty Cycle; BRITE_IN = 0.6V
Minimum Duty Cycle; BRITE_IN
≥
1.95V
Reverse Dimming
Duty Cycle
TIMING GENERATOR BLOCK
Number of Lamp Return Current
Cycles before Run Mode
I_SNS Run Mode Checking Interval
92
10
100
15
%
%
N
IGNITE
To switch to Run Mode
Lamp return current cycles, 8192 x 1 /f
O
I_ SNS Open Lamp Fault Detect, T
A
=25°C
FLAMP Sweep Cycles, I_SNS = 0V_SNS = 0V
16384 X Lamp Run Period
250
8
126
305
15
252
1024
16
350
Cycles
mS
mV
PK
Fault Comparator Threshold Voltage
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
ms
Steps
Cycles
I_SNS =10V
I_SNS = -10V
Active Over Voltage Protection
Inactive Over Voltage Protection
OV_SNS = 10V
OV_SNS = -10V
Active Over Current Protection
Inactive Over Voltage Protection
OC_SNS = 10V
OC_SNS = -10V
I_SNS = 0.3VDC, T
A
= 25°C
0.27
1.95
0.24
1.75
I_SNS = 2.0VDC, T
A
= 25°C
I_SNS = -0.3VDC, T
A
= 25°C
I_SNS = -2.0VDC, T
A
= 25°C
± 1.8
± 1.8
80
-200
±2
±2
260
-320
±2
±2
45
-110
0.31
2
0.3
1.9
150
-350
± 2.2
400
-450
± 2.2
80
-180
0.35
2.05
0.36
2.05
µA
µA
V
PK
V
PK
µA
E
LECTRICALS
E
LECTRICALS
µA
V
PK
V
PK
µA
µA
V
V
V
V
Full Wave Rectifiers RMS Transfer
I_SNS
RMS
Copyright
2000
Rev. 1.0b, 2003-03-31
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
MICROSEMI [ MICROSEMI CORPORATION ]
