Top

Product details

Parameters

Input voltage (type) DC/DC Vin (Min) (V) 3 Vin (Max) (V) 22 Iout (Max) (A) 1 Vout (Min) (V) 0.2 Vout (Max) (V) 20 Regulated outputs (#) 1 Topology Buck Dimming method PWM Power factor correction (Min) Features Enable/Shutdown, Integrated Switch, Thermal Shutdown Operating temperature range (C) -40 to 125 Switching frequency (Min) (kHz) 1600 Switching frequency (Max) (kHz) 1600 Iq (Typ) (mA) 1.8 Vref (V) 0.205 open-in-new Find other General lighting LED drivers

Package | Pins | Size

HVSSOP (DGN) 8 15 mm² 3 x 4.9 SOT-23-THN (DDC) 6 5 mm² 2.9 x 1.6 open-in-new Find other General lighting LED drivers

Features

  • 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
open-in-new Find other General lighting LED drivers

Description

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.

open-in-new Find other General lighting LED drivers
Download
Similar products you might be interested in
open-in-new Compare products
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TPS92513 ACTIVE 42-V 1.5-A analog current adjustable buck LED driver This product provides both analog dimming and PWM dimming capabilities and it supports up to 1.5 A output current. Input voltage up to 42 V.

Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

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 a (...)

Features
  • VIN operating range of 3V to 22V
  • Drives up to 5 High-Brightness LEDs in series at 1A
  • Thin SOT23-6 package
  • 1.6MHz switching frequency
  • EN/DIM input for enabling and PWM dimming of LEDs
  • 300mΩ NMOS switch
  • 40nA shutdown current at VIN = 5V
  • Internally compensated current-mode control
  • Cycle-by-cycle current limit
  • (...)
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

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 (...)

CAD/CAE symbols

Package Pins Download
HVSSOP (DGN) 8 View options
SOT-23-THIN (DDC) 6 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Related videos