LM3405AXMY/NOPB Part Information

Details for LM3405AXMY/NOPB by Texas Instruments

Electronic & Electrical Components>Semiconductors - ICs>Driver & Interface ICs

Part 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.

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Part Features

  • 1.6-MHz Switching Frequency
  • 300-mu2126 NMOS Switch
  • 40-nA Shutdown Current at VIN = 5 V
  • Cycle-by-Cycle Current Limit
  • Drives up to 5 High-Brightness LEDs in Series at 1 A
  • EN/DIM Input for Enabling and PWM Dimming of LEDs
  • Input Voltage UVLO
  • Internally Compensated Current-mode Control
  • Overcurrent Protection
  • Thermal Shutdown
  • Thin SOT-6 and MSOP-PowerPADu2122-8 Packages
  • VIN Operating Range of 3 V to 22 V

Part Specifications

Device Topology Buck (Step Down)
Input Voltage Min 3V
Input Voltage Max 22V
Output Voltage Max 20V
Output Current Max 1A
Switching Frequency 1.6MHz
No. of Outputs 1Outputs
IC Mounting SMD
Driver Case Style MSOP PowerPAD
No. of Pins 8Pins
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
Output Current 1A
Output Voltage 20V
RoHS Compliant

Alternative Part Descriptions

  • LED DRIVER, BUCK, 1.6MHZ, HVSSOP-8; Device Topology:Buck (Step Down); Input Voltage Min:3V; Input Voltage Max:22V; Output Voltage Max:20V; Output Current Max:1A; Switching Frequency:1.6MHz; No. of Outputs:1Outputs; IC Mounting:SMD; RoHS Compliant: Yes | Newark Electronics
  • 1.6-MHz, 1-A constant current buck LED driver with internal compensation | Texas Instruments

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LM3405AXMY/NOPB?

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What category does LM3405AXMY/NOPB fall under?

The LM3405AXMY/NOPB is listed under Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs.

Can I view similar or alternative parts?

You can view similar parts to LM3405AXMY/NOPB when available in the Driver & Interface ICs range under the specifications section at the bottom of the details page.

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Is the LM3405AXMY/NOPB RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Farnell.

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Authorised distributors including Newark Electronics and Texas Instruments have stock available or on a lead time for LM3405AXMY/NOPB.

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