LX1686E Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1686E Datasheet PDF : 8 Pages
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LX1686E
TM
®
Digital Dimming CCFL Controller IC
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature -0°C ≤ TA ≤ 85°C for the LX1686E
CPW and -40°C ≤ TA ≤ 85°C for the LX1686E IPW except where otherwise noted. Test conditions: VDD = VDD_P = 3.0 to 5.5V, Ri =
40kΩ, CVCO = 0.01µF, CAFD = 0.22µF, CTRI = 0.83µF, CRAMP = 208pF, RRAMP = 15kΩ, CPD = 0.22µF, CPDB = 0.047µF, RPD = 110kΩ
Parameter
Symbol
Test Conditions
Power Supply Voltage
VDD VDD = VDD_P
Operating Current
Power Supply Voltage
IDD
VDD = VDD_P = 5V
VDD_P VDD = VDD_P
Output Buffer Operating Current
UVLO Threshold
UVLO Hysteresis
` DIRECT DRIVE RAMP BLOCK
IDD_P
VTH_UVLO
VH_UVLO
Volsns = VDD = VDD_P = 5V, CA = CB = 1000pF
Triangular Wave Generator Analog
Output Peak Voltage
VP_TRI
Triangular Wave Generator Analog
Output Valley Voltage
VV_TRI
Triangular Wave Generator Oscillation
Frequency
F_TRI
Triangular Wave Generator Oscillation
Charge Current
ICHG_TRI
Triangular Wave Generator Oscillation
Discharge Current
IDISCHG_TRI
Ramp Generator Analog Output Peak
Voltage
VP_RAMP
Ramp Generator Analog Output Valley
Voltage
VV_RAMP
Tri_c = 0V
Tri_c = 3V
Ramp Frequency Change Threshold
VTH_RAMP_R
VDD = 3V
VDD = 5.5V
Ramp Generator Oscillation
Frequency – Nominal
Ramp Generator Oscillation
Frequency – Maximum
FRAMP 0 < VTRI_C < 1.35V
FRAMP_HI VTRI_C = 2.25V
OLSNS Threshold Voltage
OLSNS Hysteresis
OLSNS-to-ICOMP Propagation Delay
` DIGITAL DIMMER BLOCK
VTH_OLSNS
VH_OLSNS
TD_OLSNS
VDD = 3V
VDD = 3V
GBD
FVERT Input Frequency Capture
Range
FR_FVERT
FVERT Logic Threshold
FVERT Input Resistance
VCO Analog Output Peak Voltage
VCO Analog Output Valley Voltage
VCO Forced Source Current
Forced VCO Oscillation Frequency
VTH_FVERT Design Reference Only
RFVERT Design Reference Only
VP_VCO
VV_VCO
FR_VCO_I_SRC VPD_CR = 3V, VDD = 3V
FX_VCO AFC_C = 0V, CVCO = 0.01µF
Auto-Frequency Detection Response TD_AFD FVERT Frequency is 200Hz, VDD = 3V
BRITE Voltage Range
Full-Brightness Brite Input Voltage
VR_BRITE
VBRITE_FULL
VBRT_POS = VDD or float; BRITE = 2.5V
VBRT_POS = 0V, BRITE = 0.5V
Full-Darkness Brite Input Voltage
VBRITE_DARK VBRT_POS = VDD or float, BRITE = 0.5V
VBRT_POS = 0V, BRITE = 2.5V
LX1686E
Min Typ Max
3
5.5
5
10
3
5.5
2
10
2.7
2.9
160
Units
V
mA
V
mA
V
mV
2.25
V
0.75
V
10
Hz
-2.3 -2.55 -2.9
µA
2.3
2.65
2.9
µA
2.25
V
0.75
V
1.35 1.6 1.65
V
1.35 1.6 1.85
V
84
100 116 KHz
170 200 256 KHz
200 300 400 mV
45
mV
1
µS
45
200
Hz
VDD/2
V
50
kΩ
2.5
V
0.65
V
-6.4
-5.6
-5.1
µA
250
Hz
1000
ms
0
VDD
V
2.25 2.5 2.65
V
2.25
2.5
2.65
V
0.35
0.5
0.65
V
0.35
0.5
0.65
V
Copyright © 2004
Rev. 1.1, 2006-02-27
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
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