DatasheetsPDF.com

LM3697

Texas Instruments
Part Number LM3697
Manufacturer Texas Instruments
Description High-efficiency three-string white LED driver
Published Mar 14, 2020
Detailed Description Product Folder Order Now Technical Documents Tools & Software Support & Community LM3697 SNOSCS2D – NOVEMBER 2013 –...
Datasheet PDF File LM3697 PDF File

LM3697
LM3697

Overview
Product Folder Order Now Technical Documents Tools & Software Support & Community LM3697 SNOSCS2D – NOVEMBER 2013 – REVISED MARCH 2019 LM3697 High-efficiency three-string white LED driver 1 Features •1 Drives three parallel high-voltage led strings for display and keypad lighting • High-voltage strings capable of up to 40-V output voltage and up to 90% efficiency • Up to 30 mA per current sink • 11-Bit configurable dimming resolution • PWM input for content adjustable brightness control (CABC) • Fully configurable LED grouping and control • Integrated 1-A/40-V MOSFET • Adaptive boost output to LED voltages • Selectable 500-kHz and 1-MHz switching frequency • Four configurable overvoltage protection thresholds (16 V, 24 V, 32 V, and 40 V) • Overcurrent protection • Thermal shutdown protection • 29-mm2 Total solution size 2 Applications • Power source for smart phone illumination • Display, keypad, and indicator illumination VIN = 2.
7V to 5.
5V VIN Simplified Schematic L D1 CIN VOUT up to 40V COUT IN SDA SCL HWEN PWM LM3697 SW OVP HVLED1 HVLED2 HVLED3 PGND 3 Description The LM3697 11-bit LED driver provides highperformance backlight dimming for 1, 2, or 3 series LED strings while delivering up to 90% efficiency.
The boost converter with integrated 1-A, 40-V MOSFET automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.
The LM3697 is a high-efficiency three-string power source for backlight or keypad LEDs in smart-phone handsets.
The high-voltage inductive boost converter provides the power for three-series LED strings for display backlight and keypad functions (HVLED1, HVLED2, and HVLED3).
An additional feature is a pulse width modulation (PWM) control input for content adjustable backlight control, which can be used to control any highvoltage current sink.
The LM3697 is fully configurable via an I2Ccompatible interface.
The device operates over a 2.
7-V to 5.
5-V input voltage range and a −40°C to +8...


Similar Datasheet


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