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TPS61151DRCT Datasheet(PDF) 1 Page - Texas Instruments

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No. de pieza TPS61151DRCT
Descripción Electrónicos  DUAL OUTPUT BOOST WLED DRIVER USING SINGLE INDUCTOR
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS61151DRCT Datasheet(HTML) 1 Page - Texas Instruments

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FEATURES
TYPICAL APPLICATION
APPLICATIONS
DESCRIPTION
Vin
SW
Gnd
SEL2
SEL1
ISET1
IFB1
R1
Iout
IFB2
ISET2
R2
2.5Vto6V
Input
L110 H
m
C1
1 F
m
C2
1 F
m
TPS61150, TPS61151
SLVS625A – FEBRUARY 2006 – REVISED MARCH 2007
DUAL OUTPUT BOOST WLED DRIVER
USING SINGLE INDUCTOR
In addition to the small inductor, small capacitor and
3 mm x 3 mm QFN package, the built-in MOSFET
• 2.5-V to 6-V Input Voltage Range
and diode eliminate the need for any external power
• Two Outputs Each up to 27 V
devices. Overall, the IC provides an extremely
compact solution with high efficiency and plenty of
• 0.7-A Integrated Switch
flexibility.
• Built-In Power Diode
• 1.2-MHz Fixed PWM Frequency
• Individually Programmable Output Current
• Input-to-Output Isolation
• Built-In Soft Start
• Overvoltage Protection
• Up to 83% Efficiency
• Up to 30 kHz PWM Dimming Frequency
• Available in a 10 Pin, 3 × 3 mm QFN Package
• Sub and Main Display Backlight in Clam Shell
Phones
• Display and Keypad Backlight
• Up to 14 WLED Driver
The TPS61150/1 is a high frequency boost converter
with
two
regulated
current
outputs
for
driving
WLEDs. Each current output can be individually
programmed through external resistors. There is
dedicated selection pin for each output, so the two
outputs
can
be
turned
on
separately
or
simultaneously. The output current can be reduced
by a pulse width modulation (PWM) signal on the
select pins or an analog voltage on the ISET pin,
resulting in PWM dimming of the WLEDs. The boost
regulator runs at 1.2 MHz fixed switching frequency
to reduce output ripple and avoid audible noises
associated with PFM control.
The two current outputs are ideal for driving WLED
backlight for the sub and main displays in clam shell
phones. The two outputs can also be used for driving
display and keypad backlights. When used together,
the two outputs can drive up to 14 WLED for one
large display.
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.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006–2007, 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.


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