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TPS61180RTER датащи(PDF) 1 Page - Texas Instruments

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номер детали TPS61180RTER
подробное описание детали  WLED DRIVER FOR NOTEBOOK DISPLAY
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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TPS61180RTER датащи(HTML) 1 Page - Texas Instruments

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TPS61180/1/2
www.ti.com
SLVS801E – DECEMBER 2007 – REVISED APRIL 2013
WLED DRIVER FOR NOTEBOOK DISPLAY
Check for Samples: TPS61180/1/2
1
FEATURES
5 V to 24 V Input Voltage
Driver for Input/Output Isolation PFET
Integrated 1.5 A 40 V MOSFET
True Shutdown
1.0 MHz/1.3 MHz Switching Frequency
Over Voltage Protection
Boost Output Auto-Adaptive to WLED Voltages
WLED Open/Short Protection
Small External Components
Built-in Soft Start
Integrated Loop Compensation
16L 3 mm×3 mm QFN
Six Current Sink of 25 mA
APPLICATIONS
Up to 10 WLED in Series
Notebook LCD Display Backlight
Less Than 3% Current Matching and Accuracy
UMPC LCD Display Backlight
Up to 1000:1 PWM Brightness DImming Range
Backlight for Media Form Factor LCD display
Minimized Output Ripple Under PWM Dimming
DESCRIPTION
The TPS61180/1/2 ICs provide highly integrated solutions for media size LCD backlight. These devices have a
built-in high efficiency boost regulator with integrated 1.5A/40V power MOSFET. The six current sink regulators
provide high precision current regulation and matching. In total, the device can support up to 60 WLED. In
addition, the boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.
The devices support pulse width modulation (PWM) brightness dimming. During dimming, the WLED current is
turned on/off at the duty cycle and frequency determined by the PWM signal input on the DCRTL pin. One
potential issue of PWM dimming is audible noises from the output ceramic capacitors. The TPS61180/1/2 family
is designed to minimize this output AC ripple across a wide dimming duty cycle and frequency range; therefore,
reducing the audible noise.
The TPS61180/1/2 ICs provide a driver output for an external PFET connected between the input and inductor.
During short circuit or over-current conditions, the ICs turn off the external PFET and disconnect the battery from
the WLEDs. The PFET is also turned off during IC shutdown (true shutdown) to prevent any leakage current of
the battery. The device also integrates over-voltage protection, soft-start and thermal shutdown.
The TPS61180 IC requires external 3.3V IC supply, while TPS61181 and TPS61182 ICs have a built-in linear
regulator for the IC supply. All the devices are in a 3×3 mm QFN package.
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.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007–2013, 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.


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