LM3481
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
2.97V to 48V High-Efficiency Controller for Boost, SEPIC and Flyback

 

Models (9)

Title Category Type Date
LM3481 Unencrypted PSpice Transient Model (Rev. D) PSpice Model ZIP 04 Oct 2019
LM3481 TINA-TI Load Transient Reference Design (Rev. C) TINA-TI Reference Design TSC 04 Oct 2019
LM3481 STARTUP TINA-TI TRANSIENT REFERENCE DESIGN TINA-TI Reference Design TSC 04 Oct 2019
LM3481 TINA-TI TRANSIENT SPICE MODEL (Rev. C) TINA-TI Spice Model ZIP 04 Oct 2019
LM3481 Unencrypted PSpice Average Model PSpice Model ZIP 04 May 2015
LM3481 TINA-TI Steady State Reference Design (Rev. B) TINA-TI Reference Design TSC 27 Apr 2015
LM3481 TINA-TI Average Spice Model TINA-TI Spice Model ZIP 21 Apr 2015
LM3481 TINA-TI Average Reference Design TINA-TI Reference Design TSC 21 Apr 2015
LM3481 PSpice Average Model PSpice Model ZIP 25 Jan 2013

Design kits & evaluation modules (3)

Name Part# Type
High Efficiency Boost Switching Controller Eval Board with 12 Volt Output LM3481EVAL Evaluation Modules & Boards
Isolated Flyback Topology Evaluation Module for LM3481 Boost Controller LM3481-FLYBACKEVM Evaluation Modules & Boards
LM3481 SEPIC Evaluation Board LM3481SEPICEVAL Evaluation Modules & Boards

Reference designs

20-48-Vdc input isolated flyback reference design with a 48-V, 1.25-A output

This reference design uses the LM3481 to provide an isolated 48-V output from a DC input ranging from 20 to 48-V. Its low profile design makes it suitable for applications where a small solution size is critical. The design achieves over 91% efficiency at a nominal 0.8-A load, and can provide a (...)

View the Important Notice for reference designs covering authorized use, intellectual property matters and disclaimers.

Description Part Number Company Tool Type
24W Boost Converter Optimized for Low Profile/Small Area PMP7424 Texas Instruments Reference designs
330mW AC or DC Tiny Flyback Converter Power Supply Reference Design LM3481-REF Texas Instruments Reference designs
40W SEPIC Conv w/Coupled-Inductor Hi Efficiency Operating w/Automotive Input Range Reference Design PMP9184B Texas Instruments Reference designs
40W SEPIC Conv w/Dual-Inductor High Efficiency Operating w/Automotive Input Range Reference Design PMP9184C Texas Instruments Reference designs
6 to 16Vin 12V@4A Output Wide Vin SEPIC Converter Reference Design PMP9332 Texas Instruments Reference designs
9.5V @ 1.5A Automotive Boost Converter PMP8536 Texas Instruments Reference designs
Automotive Range SEPIC Converter Delivers 12V@1A Reference Design PMP8937 Texas Instruments Reference designs
Automotive Range SEPIC Converter Delivers 4.5V@5.5A Reference Design PMP8903 Texas Instruments Reference designs
Battery Powered Boost Converter Delivers 120Vdc @ 10mA Reference Design PMP8956 Texas Instruments Reference designs
Boost for Capacitor Charging with 48V @ 1A Peak Reference Design PMP8711 Texas Instruments Reference designs
Boost, 100.0V @ 10mA PMP7129 Texas Instruments Reference designs
Boost, 5.0V @ 0.9A PMP7185 Texas Instruments Reference designs
Sepic, 12.0-100.0V @ 10mA PMP7135 Texas Instruments Reference designs
Sepic, 6.0V @ 1.5A PMP7155 Texas Instruments Reference designs
Sepic, 7.8V @ 0.8A PMP7130 Texas Instruments Reference designs

Software (1)

Development tools (1)

Name Part# Type
Fly-Buck and Flyback Topology Selector FLYBUCK-FLYBACK-DESIGN-CALC Calculation Tools
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WEBENCH® Designer LM3481

Topology Option
  Min   Max Range
Vin  V 7 to 42V
Vout  V 1.225 to 30V
Iout  A 0 to 2.5A
Ambient Temp  °C -40 to 125°C