LX1689 Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1689 Datasheet PDF : 14 Pages
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LX1689
TM
®
Third Generation CCFL Controller
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS (CONTINUED)
Parameter
Symbol
Test Conditions
` RAMP GENERATOR
Max Strike / Run Frequency Ratio
FRAMP_STK Ratio to run frequency, I_SNS = OV_SNS = 0V
Maximum Lamp Run Frequency
FRAMP_RUNMAX Lamp is ignited; I_R=10K
Lamp Run Frequency
FLAMP_RUN Lamp is ignited ;TA = 25°C
Lamp Run Frequency
FLAMP_RUN Lamp is ignited
Lamp Run Frequency Regulation over
V_BATT
FLAMP_REG
3.3 < VBATT < 28V
Internal Digital Dimming
Burst Frequency
` BIAS BLOCK
FBURST
DIV_248 = VDD_A, DIM_MODE = 0V
DIV_248 = Floating, DIM_MODE = 0V
DIV_248 = Gnd, DIM_MODE = 0V
Voltage at Pin I_R
V_IR
VBATT = 2.8V to 28V, IOUT = 0 to 100uA, TA = 25°C
Pin I_R Max Source Current
Voltage Reference Voltage
(Internal node)
` PWM BLOCK
IMAX_IR
V2P0
I_R = 0V
TA = 25°C, reference use only
Error Amp Transconductance
Error Amp Output Source Current
Error Amp Output Sink Current
Error Amp Output High Voltage
Error Amp Output Low Voltage
Error Amp Input Offset Voltage
Max Duty Cycle
Ramp Valley Voltage
Ramp Peak Voltage
` OUTPUT BUFFER BLOCK
GM_EAMP
IS_EAMP
ISK_EAMP
VH_EAMP
VL_EAMP
VOS_EAMP
DCMAX
RVV
RPV
BRITE_OUT – EA_IN = 50mV
EA_IN – BRITE_OUT = 50mV
Output Sink Current
Output Source Current
Output Rise Time
Output Fall Time
` DIM_CLK INPUT
ISK_OUTBUF
IS_OUTBUF
TR
TF
VAOUT, VBOUT = VDD_P
VAOUT, VBOUT = 0V
COUT = 1000pF
COUT = 1000pF
Pull-up Resistance
To VDDA
Input High Threshold
VTH_DIM_CLK Conventional Dimming
Input Low Threshold
VTL_DIM_CLK Reverse Dimming
Input High Current
IIH_DIM_CLK DIM_CLK = 5V
Input Low Current
IIL_DIM_CLK DIM_CLK = 0V
` TRI-STATE LOGIC INPUTS (DIM_MODE,DIV_248)
Low State
Floating State
High State
Input High Current
Input Low Current
VTL_TRI_
VTF_TRI
VTH_TRI
IIH_TRI
IIL_TRI
DIM_MODE = DIV_248 = 5V
DIM_MODE = DIV_248 = 0V
LX1689
Min Typ Max
4
5
6
250 450
63
65
67
61
65
69
0.1
254
127
63.5
0.95 1.0 1.05
100 700
1.99
2
2.01
90
180
5
12
5
12
2.5
2.9
0.015 0.5
70
44
200
1.95
100
100
25
200
25
200
50
0.9
1.4
0.4
0.9
45
70
-65 -100
0.4
0.6
1.2 1.35 1.8
2.1
2.8
70
120
-25
-50
Units
KHz
KHz
KHz
%
Hz
Hz
Hz
V
µA
V
µmho
µA
µA
V
V
mV
%
mV
V
mA
mA
nS
nS
KΩ
V
V
µA
µA
V
V
V
µA
µA
Copyright © 2000
Rev. 1.1, 2006-02-27
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
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