XRP7618 Exar Corporation, XRP7618 Datasheet
XRP7618
Manufacturer Part Number
XRP7618
Description
Manufacturer
Exar Corporation
Datasheet
1.XRP7618.pdf
(10 pages)
July 2011
GENERAL DESCRIPTION
The XRP7618 is an 8-channel, high voltage,
constant-current sink LED driver capable of
driving up to 100mA current per channel. With
outputs rated at 30V, the XRP7618 can control
strings of multiple LEDs with better than
±1.5% channel to channel current matching.
LED channel current is programmed via an
external resistor within a 10mA to 100mA
range. Dimming control is supported through a
standard PWM scheme up to 25kHz or through
an analog signal.
Featuring Exar’s Smart Talk
when combined with a boost converter, the
XRP7618
efficiency
minimum LED voltage necessary to maintain
current regulation mode. Multiple channels can
be
capability per channel and multiple XRP7618s
can be placed in parallel to drive over 8 strings
of LEDs.
An under voltage lock out, open LED and over
temperature protections insure safe operations
under abnormal operating conditions.
The XRP7618 is available in RoHS compliant,
“green”/halogen
TSSOP (EP) package.
TYPICAL APPLICATION DIAGRAM
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
combined
maximizes
by
to
dynamically
free
increase
space
the
overall
current
8
8
TM
reporting
saving
Fig. 1: XRP7618 Typical Application Diagram
-
-
C
C
technology,
h
h
a
a
n
n
system
driving
20-pin
n
n
e
e
the
l
l
C
C
o
o
n
n
s
s
t
t
APPLICATIONS
FEATURES
a
a
LCD Backlighting
Desktop, Notebook and TV Displays
Industrial and Medical Displays
Signage Backlighting
8 Constant-Current Channels
Up to 30V LED Channel Voltage Range
Smart Talk
Parallel Operations Support
PWM and Analog Dimming
UVLO, Open LED & Over Temperature
RoHS Compliant Halogen Free,
n
n
Adjustable up to 100mA per Channel
Channel Paralleling for higher Current
±1.5% Current Matching Accuracy
5V Biasing Voltage and Control
protection
20-pin TSSOP (EP) Package
t
t
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
C
C
u
u
r
r
r
r
e
e
n
n
t
t
TM
L
L
Power Optimization
i
i
n
n
e
e
a
a
r
r
L
L
E
E
D
D
S
S
D
m
D
m
X
X
r
www.exar.com
r
a
a
i
R
i
R
v
v
r
r
t
t
P
e
P
e
r
Rev. 1.0.0
r
T
T
7
7
a
a
W
W
6
6
l
l
k
k
1
1
i
i
t
t
T
T
8
8
h
h
M
M