lx1991 Microsemi Corporation, lx1991 Datasheet - Page 2

• Manufacturer Part Number: lx1991
• Description: Six Output Programmable Led Current Sink
• Manufacturer: Microsemi Corporation

Copyright © 2001
Rev. 1.1, 10/27/2005
P
Supply Voltage (VDD ) ............................................................................... -0.3v to 6V
Analog Output Voltage (SINK
Analog Inputs (I
Digital Inputs (ENABLE, DIG_DIM) ...........................................-0.3V to VDD +0.5V
Operating Temperature Range ...................................................................-40°C – 85°C
Storage Temperature Range.....................................................................-65°C – 150°C
Maximum Junction Temperature .......................................................................... 150°C
Peak Package Solder Reflow Temp. (40 seconds max. exposure) ........... 260°C (+0, -5)
Note:
Ground. Currents are positive into, negative out of specified terminal.
DIG_DIM
IN
ENABLE
Junction Temperature Calculation: T
The θ
board system. All of the above assume no ambient airflow.
The θ
SINK
C
T
T
SINK
LQ
GND
I
I
V
N
SLOPE
SET+
HERMAL RESISTANCE
HERMAL RESISTANCE
SET-
DD
AME
JA
JA
1
TM
Exceeding these ratings could cause damage to the device. All voltages are with respect to
6
–
numbers are guidelines for the thermal performance of the device/ 4 layer pc-
numbers are to MIL-STD-883D Method 1012.1
Plastic 4x4 MLPQ 16-Pin
Ground
Voltage Input, 4.5 to 5.5V input range. V
Current sink channels one through six. Each output sinks the programmed current from the V
ground. Compliance voltage is from 1 volt minimum to the V
A logic input that duty cycle modulates the output currents. All output currents are turned on at the programmed
current value when DIG_DIM is high and turned off when it is low. Compatible with both 3V and 5V logic.
Chip Enable Input. If logic high, all functions are enabled. If logic low, internal power is disconnected from the
V
Maximum current into VDD when ENABLE < 0.4V is 1 µA .
Current programming resistor pins. Output current in each channel is 24 times the current that flows from I
I
Current rise and fall time programming capacitor. Rise and fall times increase in direct proportion to capacitor
value. C = 450
SET-
SET
DD
A B S O L U T E M A X I M U M R A T I N G S
).......................................................................-0.3V to VDD +0.5V
pin, disabling all functions. Logic threshold is 1.6 ± 0.8V maximum over supply and temperature range.
I
SET
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
current is 1.26V / R
-
-
JUNCTION TO
JUNCTION TO
1
µ
to SINK
T H E R M A L D A T A
A * T
J
= T
R
6
or T
F U N C T I O N A L P I N D E S C R I P T I O N
A
)............................................... -0.3V to 43V
+ (P
A
A
F
MBIENT
MBIENT
SET
in microseconds, C in picofarads.
D
x θ
. Connect resistor between I
JA
, θ
, θ
).
Integrated Products
®
J
JA
Microsemi
C
DD
is internally switched (see ENABLE) to remove power from chip.
Six Output Programmable LED Current Sink
D
ESCRIPTION
2.2°C/W
36°C/W
LED
SET+
P
supply maximum.
RODUCTION
and I
SET-
RoHS / Pb-free 100% Matte Tin Lead Finish
D
DIG _DIM
ATA
P A C K A G E P I N O U T
SINK 1
SINK 2
xxxx Denotes Date Code / Lot Code
VDD
S
LQ P
HEET
1
3
4
2
16
LQ P
ACKAGE
5
(Top View)
MSC
1991
xxxx
15
6
LED
ACKAGE
14
7
M
supply to
ARKING
13
8
12
11
10
9
LX1991
NC
ISET -
SINK 6
GND
SET+
Page 2
to