lx1699 Microsemi Corporation, lx1699 Datasheet

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lx1699

Manufacturer Part Number
lx1699
Description
High Performance Ccfl Controller
Manufacturer
Microsemi Corporation
Datasheet
Copyright © 2009
Rev. 1.0, 2008-09-05
cost CCFL (Cold Cathode Fluorescent
Lamp) controller optimized for wide input
voltage
applications.
The
architecture
(Display Power Saving Technology) that
adjusts the brightness as a function of
video content.
The controller includes a built-in reference
voltage regulator so it can be operated
directly from the battery without the need
of an external 5V supply from the system.
bridge driven and includes DC coupled
high side drivers on chip for the external
P-channel high side and N-channel low
side power MOSFETs. Also for fixed
input supply applications the IC may be
used as a Direct Drive CCFL controller
connected directly to the high voltage
transformer primary via a single pair of
N-FET drivers.
IMPORTANT: For the most current data, consult MICROSEMI’s website:
Patents Pending
-20 to 70
The LX1699 is a high performance, low
T
The LX1699 power stage is full
A
(°C)
Note: Available in Tape & Reel. Append the letters “TR” to the part number.
LX1699
TM
range
DAC_BRIG
INV_PWR
INV_PWR
INV_PWM
DISOFF#
supports
JST SM07 B-SRSS-TB-G
LQ
GND
GND
CN1
1
2
3
4
5
6
7
display
PACKAGE ORDER INFO
brightness
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
ISNS
VSNS
10K
R8
10K
R7
(i.e. LX1699CLQ-TR)
Intel’s
F1
220pF
C7
1K
R5
4.7nF
C8
100K
R14
NU
C9
100nF
C10
1.0uF
C11
R11
Plastic 4x4 mm MLPQ 20-pin
RoHS Compliant / Pb-free
backlighting
LX1699CLQ
1.5A 24V
D E S C R I P T I O N
1K
control
DPST
VDD
10
1
2
3
4
5
6
7
8
9
F_OSC
ENABLE
EA_OUT
BRITE_A
BRITE_D
VCOMP
C_TO
I_SNS
V_SNS
PGND
U1
LX1699CLQ
accuracy,
frequency and burst dimming frequency
oscillators, and Microsemi’s patented full-
proof lamp strike circuitry.
and open lamp, short lamp, and over
voltage
implemented.
provided to set the lamp current from
maximum lamp current to max -1.8mArms
range.
by providing either a DC voltage or a
PWM signal to the BRITE_D pin. Burst
frequency can be controlled by either by
the on chip precision oscillator or directly
by a logic signal at BRITE_D.
The LX1699 is available in the 20 pin 4 x
4mm QFN surface mount packages.
Operating temperature ranges is -20’C ~
70’C.
The LX1699 has improved lamp current
Programmable open lamp strike timeout
Reverse analog dimming control is
Digital Dimming duty cycle is controlled
VIN_SNS
P R O D U C T H I G H L I G H T
B_OSC
AGND
VBAT
VDD
AOH
BOH
VP5
AOL
BOL
Analog Mixed Signal Group
R3
511K
20
19
18
17
16
15
14
13
12
11
VDD
VDD
AOH
BOH
AOL
BOL
Microsemi
®
fault
C3
470nF
47K
R2
fully
33nF
C6
220pF
C5
470nF
C4
100nF
C2
http://www.microsemi.com
detection
programmable
BOH
BOL
AM4542C
AM4542C
High Performance CCFL controller
U3B
U3A
4
2
device/pc-board system. All of the above assume no ambient airflow.
VBAT
The θ
C1
4.7uF
25V
AOH
AOL
are
Junction Temperature Calculation: T
4
2
VBS
VAS
JA
P
THERMAL RESISTANCE
numbers are guidelines for the thermal performance of the
RODUCTION
AM4542C
lamp
U2B
10K
R13
C15
AM4542C
U2A
fully
1uF
T H E R M A L D A T A
1
2
3
T1
TMP SIT24220-0839
CI-8.5
24:2200
VSNS
θ
• Microsemi Patented Direct Drive
• 6.5 to 24 Volts Wide Input Voltage
• Supports Intel
• Compatible with Microsemi’s New
• Fully Programmable Open Lamp
• Detects and Shuts Down for all
• On Chip Full Wave Rectifiers for
• Uses Industry Standard High
• Note Book LCD Displays
• Transportable Computers
• Web Tablet LCD displays
J
A
D
or Full Bridge Configurable
Range
PWM Input
SMBus CCFL Controllers
and Load Fault Time Outs
Common Lamp Faults
Lamp Voltage and Current
Voltage Transformers
4
5
C13
10nF
= 31 °C/W
ATASHEET
K E Y F E A T U R E S
4.7nF
A P P L I C A T I O N S
C14
C16
15pF
3KV
-
ISNS
JUNCTION TO AMBIENT
JST SM02 B-BHSS-1-TB(LF)(SN)
100nF
C17
C12
NU
J
= T
R12
340 Ohm
SM02
CN2
TM
1
2
A
DPST for System
+ (P
D
LX1699
x θ
JA
).
Page 1
TM

Related parts for lx1699

lx1699 Summary of contents

Page 1

... DC voltage or a PWM signal to the BRITE_D pin. Burst frequency can be controlled by either by the on chip precision oscillator or directly by a logic signal at BRITE_D. The LX1699 is available in the 20 pin 4 x 4mm QFN surface mount packages. Operating temperature ranges is -20’C ~ 70’C. http://www.microsemi.com ...

Page 2

... To obtain a copy, please contact your local Microsemi sales representative. The name of your local representative can be obtained at the following link http://www.microsemi.com/contact/contactfind.asp or Contact us directly by sending an email to: IPGdatasheets@microsemi.com Be sure to specify the data sheet you are requesting and include your company name and contact information and or vcard. We look forward to hearing from you. Copyright 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® ...

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