LX1686(2000) Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1686 Datasheet PDF : 5 Pages
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LX1686
PRODUCT DATABOOK 1996/1997
DIGITAL DIMMING CCFL CONTROLLER IC
PRELIMINARY DATA SHEET
RangeMAXTM
A B S O L U T E M A X I M U M R AT I N G S (Note 1)
Supply Voltage (VDD, VDD_P) ......................................................................... 6.5V
Digital Inputs .................................................................................. -0.3 to VDD+0.5V
Analog Inputs .................................................................................. -0.3 to VDD+0.5V
Digital Outputs ................................................................................ -0.3 to VDD+0.5V
Analog Outputs ............................................................................... -0.3 to VDD+0.5V
Operating Junction Temperature
Plastic (DB, PW Packages) .......................................................................... 150°C
Storage Temperature Range .............................................................. -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) .................................................... 300°C
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with
respect to Ground. Currents are positive into, negative out of the specified
terminal.
THERMAL DATA
PW PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
100°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board
system. All of the above assume no ambient airflow.
PACKAGE PIN OUTS
AOUT
VSS_P
VSS
AFD_C
RAMP_C
RAMP_R
FVERT
PD_CR
VCO_C
BRT_POS
BRITE
DIG_DIM
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
PW PACKAGE
(Top View)
BOUT
VDD_P
VDD
TRI_C
OLSNS
ISNS
ICOMP
VSNS
VCOMP
BRT
I_R
ENABLE
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the recommended operating conditions of TA = 0 to 85°C, 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, CPDC= 0.047µF, RPD= 110kΩ.)
Parameter
Symbol
Test Conditions
LX1686
Units
Min. Typ. Max.
Power Supply Voltage
VDD VDD = VDD_P
3
5.5
V
Operating Current
Power Supply Voltage
IDD VDD = VDD_P = 5V
VDD_P VDD = VDD_P
5
7
mA
3
5.5
V
Output Buffer Operating Current
UVLO Threshold
UVLO Hysteresis
IDD_P Volsns = VDD = VDD_P = 5V, CA = CB = 1000pF
2
10
mA
VTH_UVLO
2.7
2.9
V
VH_UVLO
160
mV
Direct Drive Ramp Block
Triangular Wave Generator Analog Output Peak Voltage
Triangular Wave Generator Analog Output Valley Voltage
Triangular Wave Generator Oscillation Frequency
Triangular Wave Generator Oscillation Charge Current
Triangular Wave Generator Oscillation Discharge Current
Ramp Generator Analog Output Peak Voltage
Ramp Generator Analog Output Valley Voltage
Ramp Frequency Change Threshold
VP_TRI
VV_TRI
F_TRI
ICHG_TRI
IDISCHG_TRI
VP_RAMP
VV_RAMP
VTH_RAMP_R
Ramp Generator Oscillation Frequency - Nominal
Ramp Generator Oscillation Frequency - Maximum
OLSNS Threshold Voltage
OLSNS Hysteresis
OLSNS-to-ICOMP Propagation Delay
FRAMP
FRAMP_HI
VTH_OLSNS
VH_OLSNS
TD_OLSNS
Tri_c = 0V
Tri_c = 3V
VDD = 3V
VDD = 5.5V
VTRI_C = 1.4V
VTRI_C = 2.25V
VDD = 3V
VDD = 3V
GBD
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
1.4 1.5 1.65
V
1.55 1.65 1.8
V
84 100 116 KHz
170 200 256 KHz
250 300 360 mV
45
mV
1
µS
2
Copyright © 2000
Rev. 0.4 1/00
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