LX1691
Enhanced Multi-Mode CCFL Controller
®
TM
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS (CONTINUED)
]
LX1691
Typ
Parameter
Symbol
Test Conditions
Units
Min
Max
RAMP GENERATOR
`
`
Max Strike / Run Frequency Ratio
Maximum Lamp Run Frequency
Lamp Run Frequency
FRAMP_STK Ratio to run frequency, I_SNS = OV_SNS = 0V
FRAMP_RUNMAX Lamp is ignited; I_R = 20K
3
250
63
262
65
KHz
KHz
KHz
FLAMP_RUN
67
69
Lamp is ignited, I_R = 80.6K, TA = 25°C
Lamp Run Frequency
Lamp Run Frequency Regulation over
VDDP
Internal Digital Dimming
Burst Frequency
FLAMP_RUN Lamp is ignited, I_R = 80.6K
61
65
FLAMP_REG 3.3 < VDDP < 5.5V
0.1
%
FBURST
DIM_MODE = 0V, FLAMP_RUN / 512, I_R = 80.6K
127
Hz
PWM BLOCK
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
GM_EAMP
IS_EAMP
ISK_EAMP
VH_EAMP
VL_EAMP
VOS_EAMP
DCMAX
RVV
60
150
100
µmho
µA
µA
V
100
BRITE_OUT – EA_IN = 50mV
EA_IN – BRITE_OUT = 50mV
2.5
2.9
0.015
0.5
30
V
mV
%
47
100
2.1
Ramp Valley Voltage
Ramp Peak Voltage
mV
V
RPV
DD_CLK INPUT
`
`
Pull-up Resistance
To VDDA
50
1.6
0.9
45
KΩ
V
Input High Threshold
Input Low Threshold
VTH_DD_CLK Conventional Dimming
VTL_DD_CLK Reverse Dimming
2.0
0.4
V
Input High Current
IIH_DD_CLK
IIL_DD_CLK
DD_CLK = 5V; VDDP=5V
DD_CLK = 0V; VDDP=5V
70
µA
µA
Input Low Current
-65
-100
DIM_MODE INPUT
Low State
VTL_TRI_
VTF_TRI
VTH_TRI
IIH_TRI
0.4
1.2
0.85
1.35
2.35
70
V
V
Floating State
1.8
2.8
120
-50
High State
V
Input High Current
Input Low Current
ANALOG DIMMER BLOCK
BRITE_IN Input Current
DIM_MODE = 5V
DIM_MODE = 0V
µA
µA
IIL_TRI
-25
`
BRITE_IN II BRITE_IN = 0 to 5V
BRITE_IN = 0V
-1
0
1
60
µA
mV
V
25
2.0
2.0
25
Conventional Dimming
BRITE_OUT
BRITE_IN > 2.05V
BRITE_ IN < 0V
1.9
1.9
0
2.10
2.1
60
V
BRITE_IN > 2.05V
mV
Copyright © 2003
Rev. 1.0, 7/16/2004
Microsemi
Page 6
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
MICROSEMI [ Microsemi ]
