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
V_BATT
BLOCK DIAGRAM
ENABLE
ENABLE & BIAS
GENERATOR
BLOCK
SLEEP
SHUTDOW N
RAMP_D
FAULT
PWM CONTROL
BLOCK
OUTPUT
STEERING
LOGIC
OUTPUT DRIVERS BLOCK
AOUT
VDD_A
VDD_P
I_R
DUAL LDO
5.3V
2.95V
UVLO BIAS
2.0V
REF
PW R_GD
DIM CLOCK
IGNITE
DIGITAL DIM
+ RAMP_C
-
BRITE_OUT +
-
ERROR
AMP
BOUT
EA_OUT
EA_IN
BRITE_IN
BRITE_C
2.0V
+
-
0.5V
VDD_A
FAULT
0.5V +
-
50K
75K
50K
-
0.5V +
DDIM
F EXT
ANADIM
B R IT E _O U T
200K
BRITE_R I1
I1
D IM _C LK
DIM_ MODE
DIV_248
VDD_A
-
+
3 STATE
DECODER
3 STATE
DECODER
1V
EXT
ANLG
INT
-
+
6BIT
VDAC
MUX
&
DIV
6 BIT
COUNTER
N
R
QD
Q
RESET
QS
RS R
-
+
2.0V
-
+
-
+
LAMP FEEDBACK
CONDITIONING BLOCK
LSNS
RECTIFIER
OC_SNS
RECTIFIER
OV_SNS
RECTIFIER
I_SNS
OC_SNS
OV_SNS
+
-
300mV
RUN MODE
FAULT DET
STRIKE MODE
FAULT DET
200K
GND
STRIKE
DETECTION
BLOCK
FAULT
IGNITE
20 BIT
COUNTER &
POW ER ON
RESET LOGIC
10 BIT
REGISTER
10 BIT
IDAC
DIMMING
CONTROL
BLOCK
DIGITAL DIM
ANALOG DIM
RAMP
GENERATOR
RAMP_C
TIMMING
GENERATOR
BLOCK
FIGURE 1 – Simplified Block Diagram
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 8
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