LX1995-1CSE MICROSEMI, LX1995-1CSE Datasheet

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LX1995-1CSE

Manufacturer Part Number
LX1995-1CSE
Description
Manufacturer
MICROSEMI
Datasheet

Specifications of LX1995-1CSE

Operating Supply Voltage (typ)
1.8/2.5/3.3/5V
Number Of Segments
4
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Package Type
SOT-23
Pin Count
5
Mounting
Surface Mount
Operating Supply Voltage (min)
1.6V
Operating Supply Voltage (max)
5.5V
Lead Free Status / Rohs Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LX1995-1CSE
Manufacturer:
MICROSEMI/美高森美
Quantity:
20 000
Copyright © 2000
Rev. 1.1, 2005-07-07
miniature LED driver with integrated
drivers. It is designed to drive white
or color LEDs in portable display
applications.
adjustable step-up boost converter.
The LX1995-x can switch up to 2MHz
allowing designers to use a low cost,
small inductor and filter capacitor.
voltage range (1.6V to 5.5V) with
efficiency greater than 85% and can
start up at 1.6V input. The LX1995-x
is a low cost, high efficiency LED
driver.
pseudo-hysteretic
modulation topology.
battery applications the LX1995-x
offers high system efficiency with low
quiescent current: in operation I
70µA and in standby I
IMPORTANT: For the most current data, consult MICROSEMI’s website:
The Microsemi LX1995-x is a
The driver supports a wide input
-40 to 85
-40 to 85
TM
T
A
The design is based on a
(°C)
The LX1995-x is an
pulse
Current
325mA
500mA
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Switch
Q
is < 1µA.
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1995-1CSG-TR)
V
BAT
In portable
frequency
= 2.0V to 5.0V
D E S C R I P T I O N
Q
SG
is <
programmable using an external current
sense resistor in series with LEDs. This
configuration provides a feedback to the
FB pin which maintains constant output
current independent of input voltage
and LED forward voltage (VF). LED
dimming is accomplished using a PWM
signal or varying DC voltage methods.
Pin TSOT and SOT-23 package. The
LX1995-1 can drive up to 6 LEDs
(switching current is 325mA).
LX1995-2 can drive up to 10 LEDs
(switching current is 500mA).
ON OFF
Plastic TSOT
5-Pin
RoHS Compliant / Pb-free
The LX1995-x output current is
The LX1995-x is available in the 5-
P R O D U C T H I G H L I G H T
P A C K A G E O R D E R I N F O
LX1995-1CSG
LX1995-2CSG
Integrated Products Division
®
Microsemi
http://www.microsemi.com
IN
SHDN
LX1995
GND
SW
FB
SE
P
Miniature LED Driver
The
RoHS Compliant / Pb-free Transition DC: 0503
RODUCTION
Plastic SOT-23
5-Pin
LX1995-1CSE
LX1995-2CSE
< 1µA Shutdown Current
> 85% Maximum Efficiency
Efficient at Low Current Levels
< 70µA Quiescent Supply
Current in Operating Mode
V
Logic Controlled Shutdown
Dimming Options: PWM or
Varying DC Voltage
Tiny 5-Pin TSOT Package
Smallest External Components
Pagers
Wireless Phones
PDAs
LED Driver
Digital Camera Displays
GPS Receivers
D
IN
ATA
K E Y F E A T U R E S
Range 1.6V to 5.5V
A P P L I C A T I O N S
S
HEET
LX1995
Page 1

Related parts for LX1995-1CSE

LX1995-1CSE Summary of contents

Page 1

... Range 1.6V to 5.5V IN Logic Controlled Shutdown Dimming Options: PWM or Varying DC Voltage Tiny 5-Pin TSOT Package Smallest External Components The Pagers Wireless Phones PDAs LED Driver Digital Camera Displays GPS Receivers Plastic SOT-23 SE 5-Pin RoHS Compliant / Pb-free Transition DC: 0503 LX1995-1CSE LX1995-2CSE Page 1 ...

Page 2

... Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® ) ..............................- θ A 207°C/W MBIENT JA , θ A 191°C/W MBIENT JA x θ Description for normal operation. Microsemi Integrated Products Division LX1995 Miniature LED Driver RODUCTION ATA HEET GND ACKAGE (Top View GND 2 SHDN FB 3 ...

Page 3

... TM Unless otherwise specified, the following specifications apply over the operating ambient otherwise noted and the following test conditions: V LX1995-1 and LX1995-2 part versions. Parameter Operating Voltage Minimum Start-up Voltage Start-up Voltage Temperature Coefficient Quiescent Current FB Threshold Voltage FB Input Bias Current Shutdown Input Bias Current ...

Page 4

... Case Size IN SW LX1995 SHDN FB GND L 1 10µH 1206 Case Size IN SW LX1995 ON OFF SHDN FB GND 2. 0mA to 20mA LED Microsemi Integrated Products Division LX1995 Miniature LED Driver RODUCTION ATA HEET 0.1µ Ω 0.1µ 100kΩ 17.4kΩ ...

Page 5

... Rcs = (0. {[R - (0.375 x R MSB LSB I LED MAX 0. MAX MAX MAX Figure 5 – Binary Dimming LED Driver Application Microsemi Integrated Products Division LX1995 Miniature LED Driver D S RODUCTION ATA HEET 0.1µ 90.9kΩ 11.2kΩ Ω .1µ ...

Page 6

... NDUCTOR P ROGRAMMING Microsemi recommends the use inductors (for the LX1995-1) in the range of 10µH to 47µH due to saturation of peak inductor current. inductor current, the LX1995-x will extend the power range. Smaller inductor values will reduce output voltage ripple and are smaller in size. ...

Page 7

... LED Current Copyright © 2000 Rev. 1.1, 2005-07-07 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Miniature LED Driver P RODUCTION 100 47µH Inductor, 4 White LEDs Microsemi Integrated Products Division LX1995 D S ATA HEET 5. LED Current Page 7 ...

Page 8

... Dim Dim Microsemi Integrated Products Division LX1995 Miniature LED Driver RODUCTION ATA HEET M I ILLIMETERS NCHES MIN MAX MIN MAX - 1.00 - 0.039 0.01 0.10 0.0004 0.004 0.84 0.90 0.033 0.035 0.30 0.45 0.012 0.018 0.12 0.20 0.005 0.008 2.90 BSC ...

Page 9

... Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2000 Rev. 1.1, 2005-07-07 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Miniature LED Driver P RODUCTION Microsemi Integrated Products Division LX1995 D S ATA HEET Page 9 ...

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