lx1689 Microsemi Corporation, lx1689 Datasheet - Page 6

• Manufacturer Part Number: lx1689
• Description: Third Generation Ccfl Controller
• Manufacturer: Microsemi Corporation

Copyright © 2000
Rev. 1.1, 2006-02-27
RAMP GENERATOR
Max Strike / Run Frequency Ratio
Maximum Lamp Run Frequency
Lamp Run Frequency
Lamp Run Frequency
Lamp Run Frequency Regulation over
V_BATT
BIAS BLOCK
Voltage at Pin I_R
Pin I_R Max Source Current
Voltage Reference Voltage
(Internal node)
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
Ramp Valley Voltage
Ramp Peak Voltage
OUTPUT BUFFER BLOCK
Output Sink Current
Output Source Current
Output Rise Time
Output Fall Time
Pull-up Resistance
Input High Threshold
Input Low Threshold
Input High Current
Input Low Current
Low State
Floating State
High State
Input High Current
Input Low Current
Internal Digital Dimming
Burst Frequency
TRI-STATE LOGIC INPUTS (DIM_MODE,DIV_248)
DIM_CLK INPUT
TM
Parameter
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
E L E C T R I C A L C H A R A C T E R I S T I C S ( C O N T I N U E D )
F
V
V
RAMP_RUNMAX
Symbol
F
F
F
F
I
I
I
V
I
G
SK_OUTBUF
IH_DIM_CLK
V
IL_DIM_CLK
I
V
TH_DIM_CLK
TL_DIM_CLK
V
S_OUTBUF
RAMP_STK
LAMP_RUN
LAMP_RUN
LAMP_REG
I
DC
V
V
F
I
SK_EAMP
OS_EAMP
S_EAMP
I
I
MAX_IR
M_EAMP
H_EAMP
L_EAMP
V
V
TL_TRI_
IH_TRI
BURST
R
R
TF_TRI
TH_TRI
IL_TRI
T
T
2P0
_IR
VV
PV
MAX
R
F
Ratio to run frequency, I_SNS = OV_SNS = 0V
Lamp is ignited; I_R=10K
Lamp is ignited ;T
Lamp is ignited
3.3 < VBATT < 28V
DIV_248 = VDD_A, DIM_MODE = 0V
DIV_248 = Floating, DIM_MODE = 0V
DIV_248 = Gnd, DIM_MODE = 0V
V
I_R = 0V
T
BRITE_OUT – EA_IN = 50mV
EA_IN – BRITE_OUT = 50mV
V
V
C
C
To VDDA
Conventional Dimming
Reverse Dimming
DIM_CLK = 5V
DIM_CLK = 0V
DIM_MODE = DIV_248 = 5V
DIM_MODE = DIV_248 = 0V
A
BATT
AOUT
AOUT
OUT
OUT
Integrated Products
= 25°C, reference use only
®
Microsemi
= 1000pF
= 1000pF
, V
, V
= 2.8V to 28V, I
BOUT
BOUT
= V
= 0V
Test Conditions
DD_P
A
= 25°C
OUT
Third Generation CCFL Controller
= 0 to 100uA, T
P
RODUCTION
A
= 25°C
D
ATA
Min
0.95
1.99
250
100
2.5
0.4
0.4
1.2
63
61
90
4
5
5
S
HEET
LX1689
0.015
Typ
63.5
1.95
1.35
450
254
127
700
180
200
100
100
0.1
1.0
2.9
0.9
0.9
-65
0.6
2.1
-25
65
65
12
12
44
25
25
50
45
70
5
2
Max
-100
1.05
2.01
200
200
120
0.5
1.4
1.8
2.8
-50
67
69
70
70
6
LX1689
Units
µmho
KHz
KHz
KHz
mV
mV
mA
mA
KΩ
Hz
Hz
Hz
µA
µA
µA
nS
nS
µA
µA
µA
µA
%
%
V
V
V
V
V
V
V
V
V
V
Page 6