Startseite Energiemanagement LED-Treiber LED-Beleuchtungstreiber

LM3405A

AKTIV

Konstantstrom-Abwärts-LED-Treiber, 1,6 MHz 1 A, mit interner Kompensation

Produktdetails

Input voltage type DC/DC Topology Buck Vin (min) (V) 3 Vin (max) (V) 22 Vout (max) (V) 20 Vout (min) (V) 0.2 Iout (max) (A) 1 Iq (typ) (mA) 1.8 Features Enable/Shutdown, Integrated Switch, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method PWM Number of channels 1 Rating Catalog
Input voltage type DC/DC Topology Buck Vin (min) (V) 3 Vin (max) (V) 22 Vout (max) (V) 20 Vout (min) (V) 0.2 Iout (max) (A) 1 Iq (typ) (mA) 1.8 Features Enable/Shutdown, Integrated Switch, Thermal shutdown Operating temperature range (°C) -40 to 125 Dimming method PWM Number of channels 1 Rating Catalog
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9 SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • VIN Operating Range of 3 V to 22 V
  • Drives up to 5 High-Brightness LEDs in Series at 1 A
  • Thin SOT-6 and MSOP-PowerPAD™-8 Packages
  • 1.6-MHz Switching Frequency
  • EN/DIM Input for Enabling and PWM Dimming of LEDs
  • 300-mΩ NMOS Switch
  • 40-nA Shutdown Current at VIN = 5 V
  • Internally Compensated Current-mode Control
  • Cycle-by-Cycle Current Limit
  • Input Voltage UVLO
  • Overcurrent Protection
  • Thermal Shutdown
  • VIN Operating Range of 3 V to 22 V
  • Drives up to 5 High-Brightness LEDs in Series at 1 A
  • Thin SOT-6 and MSOP-PowerPAD™-8 Packages
  • 1.6-MHz Switching Frequency
  • EN/DIM Input for Enabling and PWM Dimming of LEDs
  • 300-mΩ NMOS Switch
  • 40-nA Shutdown Current at VIN = 5 V
  • Internally Compensated Current-mode Control
  • Cycle-by-Cycle Current Limit
  • Input Voltage UVLO
  • Overcurrent Protection
  • Thermal Shutdown

The LM3405A is a 1-A constant current buck LED driver designed to provide a simple, high efficiency solution for driving high power LEDs. With a 0.205-V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. Switching frequency is internally set to 1.6 MHz, allowing small surface mount inductors and capacitors to be used. The LM3405A uses current-mode control and internal compensation offering ease of use and predictable, high performance regulation over a wide range of operating conditions. With a maximum input voltage of 22 V, the device can drive up to 5 High-Brightness LEDs in series at 1-A forward current, with the single LED forward voltage of approximately 3.7 V. Additional features include user accessible EN/DIM pin for enabling and PWM dimming of LEDs, thermal shutdown, cycle-by-cycle current limit and overcurrent protection.

The LM3405A is a 1-A constant current buck LED driver designed to provide a simple, high efficiency solution for driving high power LEDs. With a 0.205-V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. Switching frequency is internally set to 1.6 MHz, allowing small surface mount inductors and capacitors to be used. The LM3405A uses current-mode control and internal compensation offering ease of use and predictable, high performance regulation over a wide range of operating conditions. With a maximum input voltage of 22 V, the device can drive up to 5 High-Brightness LEDs in series at 1-A forward current, with the single LED forward voltage of approximately 3.7 V. Additional features include user accessible EN/DIM pin for enabling and PWM dimming of LEDs, thermal shutdown, cycle-by-cycle current limit and overcurrent protection.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LM3405A 1.6-MHz, 1-A Constant Current Buck LED Driver With Internal Compensation in Tiny SOT and MSOP-PowerPAD™ Packages datasheet (Rev. D) PDF | HTML 19 Sep 2016
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-1685 LM3405A Demo Board (Rev. B) 01 Mai 2013
EVM User's guide AN-1899 LM3405A eMSOP Evaluation Board (Rev. B) 01 Mai 2013
Application note Powering & Dimming High-Brightness LEDs w/ LM3405 Constant-Current Buck Reg (Rev. A) 01 Mai 2013
Application note AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) 23 Apr 2013
User guide LM3405A Reference Design for MR16 LED Bulb, 600mA User Guide 27 Jan 2012

Design und Entwicklung

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Evaluierungsplatine

LM3405AEVAL — 1,6MHz, 1A Konstantstrom-Abwärts-LED-Treiber mit interner Kompensation im winzigen SOT-23-Gehäuse Ev

The LM3405A demo board is configured to drive a series string of high power, high brightness LEDs at a forward current of 1A using the LM3405A constant current buck regulator. The board can accept a full input operating range of 3V to 22V. The converter output voltage adjusts as needed to maintain (...)

Benutzerhandbuch: PDF
Evaluierungsplatine

LM3405AXMYEVAL — LM3405AXMY – 1,6 MHz, 1 A, Konstantstrom-LED-Treiber mit eMSOP-Gehäuse, EVM

LM3405A is a 1A constant current buck LED driver designed to provide a simple high efficiency solution for driving high power LEDs. With a 0.205V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. (...)

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
HVSSOP (DGN) 8 Ultra Librarian
SOT-23-THN (DDC) 6 Ultra Librarian

Bestellen & Qualität

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  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
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  • Montagestandort

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