參數(shù)資料
型號(hào)： LX1686IPWT
廠商： MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP
元件分類： 穩(wěn)壓器
英文描述： FLUORESCENT LIGHT CONTROLLER, 256 kHz SWITCHING FREQ-MAX, PDSO24
封裝： PLASTIC, TSSOP-24
文件頁(yè)數(shù)： 4/8頁(yè)
文件大小： 169K
代理商： LX1686IPWT
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
Copyright
2000
Rev. 1.1, 2003-10-23
WWW
.Microse
m
i
.CO
M
LX1686
Digital Dimming CCFL Controller IC
PRODUCTION DATA SHEET
I N T E GRA T ED
PR ODUC T S
ELECTRICAL CHA RACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature -0
°C
≤ T
A ≤ 85°C for the
LX1686CPW and -40°C
≤ T
A ≤ 85°C for the LX1686IPW except where otherwise noted. Test conditions: VDD = VDD_P = 3.0 to
5.5V, Ri = 40k
, C
VCO = 0.01F, CAFD = 0.22F, CTRI = 0.83F, CRAMP = 208pF, RRAMP = 15k, CPD = 0.22F, CPDB = 0.047F, RPD =
110k
LX1686
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Power Supply Voltage
VDD
VDD = VDD_P
3
5.5
V
Operating Current
IDD
VDD = VDD_P = 5V
5
7
mA
Power Supply Voltage
VDD_P
VDD = VDD_P
3
5.5
V
Output Buffer Operating Current
IDD_P
Volsns = VDD = VDD_P = 5V, CA = CB = 1000pF
2
10
mA
UVLO Threshold
VTH_UVLO
2.7
2.9
V
UVLO Hysteresis
VH_UVLO
160
mV
DIRECT DRIVE RAMP BLOCK
Triangular Wave Generator Analog
Output Peak Voltage
VP_TRI
2.25
V
Triangular Wave Generator Analog
Output Valley Voltage
VV_TRI
0.75
V
Triangular Wave Generator Oscillation
Frequency
F_TRI
10
Hz
Triangular Wave Generator Oscillation
Charge Current
ICHG_TRI
Tri_c = 0V
-2.3
-2.55
-2.9
A
Triangular Wave Generator Oscillation
Discharge Current
IDISCHG_TRI
Tri_c = 3V
2.3
2.65
2.9
A
Ramp Generator Analog Output Peak
Voltage
VP_RAMP
2.25
V
Ramp Generator Analog Output Valley
Voltage
VV_RAMP
0.75
V
VDD = 3V
1.35
1.5
1.65
V
Ramp Frequency Change Threshold
VTH_RAMP_R
VDD = 5.5V
1.55
1.65
1.85
V
Ramp Generator Oscillation
Frequency – Nominal
FRAMP
VTRI_C = 1.4V
84
100
116
KHz
Ramp Generator Oscillation
Frequency – Maximum
FRAMP_HI
VTRI_C = 2.25V
170
200
256
KHz
OLSNS Threshold Voltage
VTH_OLSNS
VDD = 3V
200
300
400
mV
OLSNS Hysteresis
VH_OLSNS
VDD = 3V
45
mV
OLSNS-to-ICOMP Propagation Delay
TD_OLSNS
GBD
1
S
DIGITAL DIMMER BLOCK
FVERT Input Frequency Capture
Range
FR_FVERT
45
200
Hz
FVERT Logic Threshold
VTH_FVERT
Design Reference Only
VDD/2
V
FVERT Input Resistance
RFVERT
Design Reference Only
50
k
VCO Analog Output Peak Voltage
VP_VCO
2.5
V
VCO Analog Output Valley Voltage
VV_VCO
0.65
V
VCO Forced Source Current
FR_VCO_I_SRC VPD_CR = 3V, VDD = 3V
-6.4
-5.8
-5.2
A
Forced VCO Oscillation Frequency
FX_VCO
AFC_C = 0V, CVCO = 0.01F
250
Hz
Auto-Frequency Detection Response
TD_AFD
FVERT Frequency is 200Hz, VDD = 3V
1000
ms
BRITE Voltage Range
VR_BRITE
0
VDD
V
Full-Brightness Brite Input Voltage
VBRITE_FULL VBRT_POS = VDD or float; BRITE = 2.5V
2.35
2.5
2.65
V
VBRT_POS = 0V, BRITE = 0.5V
2.35
2.5
2.65
V
Full-Darkness Brite Input Voltage
VBRITE_DARK VBRT_POS = VDD or float, BRITE = 0.5V
0.35
0.5
0.65
V
VBRT_POS = 0V, BRITE = 2.5V
0.35
0.5
0.65
V
EE
LL
EE
CC
TT
RR
IICC
AA
LL
SS
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