Startseite Energiemanagement LED-Treiber RGB-LED-Treiber

LM3435

AKTIV

Kompakter RGB-LED-Treiber mit Sequenzmodus und IC-Steuerungsschnittstelle

Eine neuere Version dieses Produkts ist verfügbar

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Produktdetails

Number of channels 3 LED current per channel (mA) 2000 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 2 Features I2C control Iq (typ) (mA) 5 Shutdown current (ISD) (typ) (µA) 8 Operating temperature range (°C) -40 to 125 Rating Catalog
Number of channels 3 LED current per channel (mA) 2000 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Iout (max) (A) 2 Features I2C control Iq (typ) (mA) 5 Shutdown current (ISD) (typ) (µA) 8 Operating temperature range (°C) -40 to 125 Rating Catalog
WQFN (RSB) 40 25 mm² 5 x 5
  • Sequential RGB Driving Mode
  • Low Component Count and Small Solution Size
  • Stable with Ceramic and Other Low ESR capacitors, No Loop Compensation Required
  • Fast Transient Response
  • Programmable Converter Switching Frequency up to 1 MHz
  • MCU Interface Ready With I2C Bus
  • Peak Current Limit Protection for the Switcher
  • LED Fault Detection and Reporting via I2C Bus

Key Specifications

  • Support up to 2A LED current
  • Typical ±3% LED current accuracy
  • Integrated N-Channel main and P-Channel synchronous MOSFETs
  • 3 Integrated N-Channel current regulating pass switches
  • LED Currents programmable via I2C bus independently
  • Input voltage range: 2.7 – 5.5 V
  • Thermal shutdown
  • Thermally enhanced WQFN package

All trademarks are the property of their respective owners.

  • Sequential RGB Driving Mode
  • Low Component Count and Small Solution Size
  • Stable with Ceramic and Other Low ESR capacitors, No Loop Compensation Required
  • Fast Transient Response
  • Programmable Converter Switching Frequency up to 1 MHz
  • MCU Interface Ready With I2C Bus
  • Peak Current Limit Protection for the Switcher
  • LED Fault Detection and Reporting via I2C Bus

Key Specifications

  • Support up to 2A LED current
  • Typical ±3% LED current accuracy
  • Integrated N-Channel main and P-Channel synchronous MOSFETs
  • 3 Integrated N-Channel current regulating pass switches
  • LED Currents programmable via I2C bus independently
  • Input voltage range: 2.7 – 5.5 V
  • Thermal shutdown
  • Thermally enhanced WQFN package

All trademarks are the property of their respective owners.

The LM3435, a Synchronously Rectified non-isolated Flyback Converter, features all required functions to implement a highly efficient and cost effective RGB LED driver. Different from conventional Flyback converter, LEDs connect across the VOUT pin and the VIN pin through internal passing elements at corresponding LED pins. Thus, voltage across LEDs can be higher than, equal to or lower than the input supply voltage.

Load current to LEDs is up to 2A with voltage across LEDs ranging from 2.0V to 4.5V. Integrated N-Channel main MOSFET, P-Channel synchronous MOSFET and three N-Channel current regulating pass switches allow low component count, thus reducing complexity and minimize board size. The LM3435 is designed to work exceptionally well with ceramic output capacitors with low output ripple voltage. Loop compensation is not required resulting in a fast load transient response. Non-overlapping RGB LEDs are driven sequentially through individual control. Output voltage hence can be optimized for different forward voltage of LEDs during the non-overlapping period. I2C interface eases the programming of the individual RGB LED current up to 1,024 levels per channel.

The LM3435 is available in the thermally enhanced 40-pin WQFN package.

The LM3435, a Synchronously Rectified non-isolated Flyback Converter, features all required functions to implement a highly efficient and cost effective RGB LED driver. Different from conventional Flyback converter, LEDs connect across the VOUT pin and the VIN pin through internal passing elements at corresponding LED pins. Thus, voltage across LEDs can be higher than, equal to or lower than the input supply voltage.

Load current to LEDs is up to 2A with voltage across LEDs ranging from 2.0V to 4.5V. Integrated N-Channel main MOSFET, P-Channel synchronous MOSFET and three N-Channel current regulating pass switches allow low component count, thus reducing complexity and minimize board size. The LM3435 is designed to work exceptionally well with ceramic output capacitors with low output ripple voltage. Loop compensation is not required resulting in a fast load transient response. Non-overlapping RGB LEDs are driven sequentially through individual control. Output voltage hence can be optimized for different forward voltage of LEDs during the non-overlapping period. I2C interface eases the programming of the individual RGB LED current up to 1,024 levels per channel.

The LM3435 is available in the thermally enhanced 40-pin WQFN package.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM3435 Compact Sequential Mode RGB LED Driver with I 2 C Control Interface datasheet (Rev. C) 02 Mai 2013
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
Application note AN-1656 Design Challenges of Switching LED Drivers (Rev. A) 03 Mai 2013
User guide AN-2196 LM3435 Evaluation Board (Rev. A) 03 Mai 2013

Design und Entwicklung

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Evaluierungsplatine

LM3435EVAL — Evaluierungsplatine für Pico-Projektor-LED-Treiber

The LM3435 Evaluation Board has been designed for evaluating the performance of the device in a typical pico projector application. The end user can interface his own system to the evaluation board to test out the performance of the system. With LM3435, the system requires only single DC-DC (...)

Benutzerhandbuch: PDF
Simulationstool

PSPICE-FOR-TI — PSpice® für TI Design-und Simulationstool

PSpice® für TI ist eine Design- und Simulationsumgebung, welche Sie dabei unterstützt, die Funktionalität analoger Schaltungen zu evaluieren. Diese voll ausgestattete Design- und Simulationssuite verwendet eine analoge Analyse-Engine von Cadence®. PSpice für TI ist kostenlos erhältlich und (...)
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
WQFN (RSB) 40 Ultra Librarian

Bestellen & Qualität

Beinhaltete Information:
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  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

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