DatasheetsPDF.com

LP8556

Texas Instruments
Part Number LP8556
Manufacturer Texas Instruments
Description High-Efficiency LED Backlight Driver
Published Apr 14, 2020
Detailed Description Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design LP8556 SNVS871M...
Datasheet PDF File LP8556 PDF File

LP8556
LP8556

Overview
Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design LP8556 SNVS871M – JULY 2012 – REVISED JUNE 2020 LP8556 High-Efficiency LED Backlight Driver For Tablets 1 Features •1 High-efficiency DC/DC boost converter with integrated 0.
19-Ω power MOSFET and three switching frequency options: 312 kHz, 625 kHz, and 1250 kHz • 2.
7-V to 36-V Boost switch input voltage range supports multi-cell Li-Ion batteries (2.
7-V to 20-V VDD input range) • 7-V to 43-V Boost switch output voltage range supports as few as 3 WLEDs in series per channel and as many as 12 • Configurable channel count (1 to 6) • Up to 50 mA per channel • PWM and / or I2C brightness control • Phase-shift PWM mode reduces audible noise • Adaptive dimming for higher LED drive optical efficiency • Programmable edge-rate control and spread spectrum scheme minimize switching noise and improve EMI performance • LED fault (short and open) detection, UVLO, TSD, OCP, and OVP (up to 6 threshold options) • Available in tiny 20-pin, 0.
4-mm pitch DSBGA package and 24-pin, 0.
5-mm pitch WQFN package 2 Applications LED backlights for tablet LCDs space Simplified Schematic 2.
7V - 20V VIN CIN 7V ± 43V L1 D1 1.
1 ” 9OUT / VIN ” 15 VOUT COUT VDD SW EN / VDDIO 1.
62V ± 3.
6V CVLDO RFSET RISET Optional EN / VDDIO VBOOST VLDO FSET ISET LP8556 LED1 LED2 LED3 LED4 LED5 MCU PWM SDA SCL LED6 GNDs 3 Description The LP8556 device is a white-LED driver featuring an asynchronous boost converter and six high precision current sinks that can be controlled by a PWM signal or an I2C master.
The boost converter uses adaptive output voltage control for setting the optimal LED driver voltages as low as 7 V and as high as 43 V.
This feature minimizes the power consumption by adjusting the output voltage to the lowest sufficient level under all conditions.
The converter can operate at three switching frequencies: 312 kHz, 625 kHz, and 1250 kHz, which can be set with an external ...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)