LX1688 Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1688 Datasheet PDF : 16 Pages
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RangeMAX™
LX1688
TM
®
Multiple Lamp CCFL Controller
PRODUCTION DATA SHEET
RECOMMENDED OPERATING CONDITIONS
Parameter
Supply Voltage (VDD ,VDDP)
BRITE Linear DC Voltage Range
BRITE PWM Logic Signal Voltage Range
Digital Inputs (SLAVE, PHA_SYNC, RMP_RST, BEPOL, ENABLE )
LX1688
Min Typ Max
3
5.5
1
2.5
0
VDD
0
VDD
Units
V
V
V
V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, specifications apply over the range: TA=-40 to 85OC, VDD (For LX1688IWP) & TA= 0 to 70OC, VDD (For
LX1688CWP), VDD_P = 3.0 to 5.5V. RI = 80Kohms, CTRI = 0.083µF
Parameter
Symbol
Test Conditions
LX1688
Min
Typ.
Max
DIMMER
Units
Conventional¹ Dimming
BRITE Input Voltage
VBRITE_MAX
VBRITE_MIN
VBEPOL = VDD
VBEPOL = VDD
2.6
2.5
V
0.4
0.5
Reverse Dimming
BRITE Input Voltage
VBRITE_MAX
VBEPOL = VSS or float
0.4
0.5
V
VBRITE_MIN
VBEPOL = VSS or float
2.6
2.5
Max Brightness VBRT Voltage
VBRT_FULL
VBEPOL = VSS, VBRITE = 0.4V
1.90
2.0
2.05
V
Full-darkness VBRT voltage
ISNS input threshold voltage
ISNS input threshold voltage
VBRT_DARK
VBEPOL = VSS, VBRITE = 2.6V
0
0.05
V
VTH_IAMP
TA= 0 to 70OC
150
300
450
mV
VTH_IAMP
TA= -40 to 85OC
150
300
550
mV
BRITE-to-ICOMP propagation delay
STRIKE AND RAMP GENERATOR
TD_BRITE
2
µS
Max. number of strike before fault
Triangular Wave Generator Analog Output
Peak Voltage
Triangular Wave Generator Analog Output
Valley Voltage
Triangular Wave Generator Oscillation
Frequency
Max. Lamp Strike Frequency
Lamp Run Frequency
Lamp Run Frequency
Lamp Run Frequency regulation over VDD
NFAULT
VP_TRI
VV_TRI
F_TRI
FMAX_STK
FLAMP
FLAMP
FLAMP_REG
FMAX_STK = FLAMP X ~2.5
VOLSNS > 0.65V; VDD=5V
TA= 0 to 70OC
VOLSNS > 0.65V; VDD=5V
TA=-40 to 85OC
VOLSNS > 0.65V
63
2.3
2.5
2.6
V
0.15
0.3
0.40
V
7
10
13
Hz
150
195
KHz
60
65
70
KHz
57
65
70
KHz
4
6
% /V
OLSNS threshold voltage
VTH_OLSNS
740
790
840
‘mV
OLSNS hysteresis
VH_OLSNS
540
590
640
‘mV
OLSNS-to-ICOMP propagation delay
Fault, PHA_SYNC, RMP_RST, logic high
threshold
Fault, PHA_SYNC, RMP_RST, logic low
threshold
TD_OLSNS
VH
VL
GBNT ²
1
us
VDD – 0.5
V
0.7
1
V
Minimum Fault-pin output current
I_FAULT
10
15
‘mA
¹Conventional polarity means that the lamp brightness increases with increasing voltage on the BRITE pin. Reverse polarity means that brightness decreases with increasing
voltage
² Guaranteed but not production tested
Copyright © 2001
Rev. 1.2, 2006-03-09
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
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