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LM3478EVAL

High Efficiency Low-Side N-Channel Controller for Switching Regulator

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LM3478EVAL

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Overview

High Efficiency Low-Side N-Channel Controller for Switching Regulator

Features
  • 8-lead Mini-SO8 (MSOP-8) package
  • Internal push-pull driver with 1A peak current capability
  • Curent limit and thermal shutdown
  • Frequency compensation optimized with a capacitor and a resistor
  • Internal soft start
  • Current mode operation
  • Undervoltage lockout with hysteresis

 
AC/DC & DC/DC controllers (external FET)
LM3478 — 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller
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Evaluation board

LM3478EVAL/NOPB — High Efficiency Low-Side N-Channel Controller for Switching Regulator

Supported products & hardware
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LM3478EVAL/NOPB — High Efficiency Low-Side N-Channel Controller for Switching Regulator

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Calculation tool

LM3478-88-BOOST-CALC — LM3478-88 quick start calculator for boost

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM3478 — 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller LM3478Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 10-µA shutdown current LM3488 — 2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators LM3488Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 5-µA shutdown current
Hardware development
Evaluation board
LM3478EVAL — High Efficiency Low-Side N-Channel Controller for Switching Regulator
Download options

LM3478-88-BOOST-CALC — LM3478-88 quick start calculator for boost

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Version: 1.1.0
Release date: Feb 14, 2025
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LM3478-88_Quickstart_Calculator_Boost_V1_1_0.zip  — 3474 K

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Products
AC/DC & DC/DC controllers (external FET)
LM3478 — 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller LM3478Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 10-µA shutdown current LM3488 — 2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators LM3488Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 5-µA shutdown current
Hardware development
Evaluation board
LM3478EVAL — High Efficiency Low-Side N-Channel Controller for Switching Regulator

Release Information

The LM3478-88 quick start calculator for boost tool supports the initial calculation of the boost power stage and of the necessary external components for a boost converter using LM3478 or LM3488 as regulation IC.

Version 1.1.0

What's new

  • Fixed Rsense calculation
Calculation tool

LM3478-88-FLYBACK-CALC — LM3478-88 quick start calculator for Flyback

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM3478 — 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller LM3478Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 10-µA shutdown current LM3488 — 2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators LM3488Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 5-µA shutdown current
Hardware development
Evaluation board
LM3478EVAL — High Efficiency Low-Side N-Channel Controller for Switching Regulator
Download options

LM3478-88-FLYBACK-CALC — LM3478-88 quick start calculator for Flyback

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Version: 1.1.0
Release date: Feb 14, 2025
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download

LM3478-88_Quickstart_Flyback_V1_1_0.zip  — 4913 K

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Products
AC/DC & DC/DC controllers (external FET)
LM3478 — 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller LM3478Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 10-µA shutdown current LM3488 — 2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators LM3488Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 5-µA shutdown current
Hardware development
Evaluation board
LM3478EVAL — High Efficiency Low-Side N-Channel Controller for Switching Regulator

Release Information

The LM3478-88 quick start calculator for Flyback topology supports the initial calculation of the power stage and of the necessary external components for a Flyback converter using LM3478 or LM3488 as regulation IC.

What's new

  • Fixed Rsense and Rt calculation
Calculation tool

LM3478-88-SEPIC-CALC — LM3478-88 quick start calculator for SEPIC

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM3478 — 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller LM3478Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 10-µA shutdown current LM3488 — 2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators LM3488Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 5-µA shutdown current
Hardware development
Evaluation board
LM3478EVAL — High Efficiency Low-Side N-Channel Controller for Switching Regulator
Download options

LM3478-88-SEPIC-CALC — LM3478-88 quick start calculator for SEPIC

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Version: V1.0.0
Release date: Oct 31, 2024
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download

LM3478-88_Quickstart_Calculator_SEPIC_V1_0_0.zip  — 1096 K

SHA-256 checksum
Products
AC/DC & DC/DC controllers (external FET)
LM3478 — 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller LM3478Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 10-µA shutdown current LM3488 — 2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators LM3488Q-Q1 — 40-V wide VIN low-side N-channel controller for switching regulators with 5-µA shutdown current
Hardware development
Evaluation board
LM3478EVAL — High Efficiency Low-Side N-Channel Controller for Switching Regulator

Release Information

The LM3478-88 quick start calculator for SEPIC tool supports the initial calculation of the SEPIC power stage and of the necessary external components for a SEPIC converter using LM3478 or LM3488 as regulation IC.

What's new

  • Initial version
TI's Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

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Type Title Date
Certificate LM3478EVAL/NOPB EU Declaration of Conformity (DoC) Jan 2, 2019
User guide AN-1204 LM3478/LM3488 Evaluation Board (Rev. A) Oct 30, 2013

Support & training

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