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LM2791LD-L датащи(PDF) 1 Page - Texas Instruments

номер детали LM2791LD-L
подробное описание детали  LM2791 Current Regulated Switched Capacitor LED Driver with Analog Brightness Control
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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LM2791LD-L датащи(HTML) 1 Page - Texas Instruments

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LM2791
www.ti.com
SNVS156M – FEBRUARY 2001 – REVISED MAY 2013
LM2791 Current Regulated Switched Capacitor LED Driver with Analog Brightness
Control
Check for Samples: LM2791
1
FEATURES
DESCRIPTION
The LM2791 is a CMOS charge-pump voltage
2
Output Matching of ± 0.3%
doubler and regulator that provides two regulated
Drives up to Two LEDs
current sources. The LM2791 is designed to drive two
3V to 5.8V Input Voltage
white (or blue) LEDs with matched currents (within ±
0.3%) to produce balanced light sources for display
Up to 36mA Output Current
backlights. They accept an input voltage range from
Soft Start Limits Inrush Current
3V
to
5.8V
and
maintain
a
constant
current
Analog Brightness Control
determined by an external set resistor.
Separate Shutdown Input
The LM2791 delivers up to 36mA of load current to
Very Small Solution Size - No Inductor
accommodate two high forward voltage (typically
white) LEDs. The switching frequency is 450kHz
0.7mA Typical Operating Current
(min.) to keep the conducted noise spectrum away
1µA (max.) Shutdown Current
from
sensitive
frequencies
within
portable
RF
450kHz Switching Frequency (min.)
devices.
Linear Regulation Generates Predictable Noise
In the LM2791, brightness is controlled by applying a
Spectrum
voltage between GND and 3.0V to the BRGT pin. The
WSON-10 Package: 3mm X 3mm X 0.8mm
LM2791 is available in active high or low shutdown
versions. The shutdown pin reduces the operating
current to 1µA (max.).
APPLICATIONS
The LM2791 is available in a 10 pin WSON CSP
White LED Display Backlights
package.
White LED Keypad Backlights
1-Cell Li-Ion Battery-Operated Equipment
Including PDAs, Hand-Held PCs, Cellular
Phones
Flat Panel Displays
Basic Application Circuit
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2001–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Not Recommended For New Designs


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