LM3478QMM/NOPB
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Texas Instruments LM3478QMM/NOPB

Manufacturer No:
LM3478QMM/NOPB
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC REG CTRLR MULT TOP 8VSSOP
Delivery:
Payment:
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Product Introduction

Overview

The LM3478QMM/NOPB is a high-efficiency low-side N-Channel MOSFET controller designed for switching regulators, manufactured by Texas Instruments. This versatile controller is suitable for various topologies, including boost, flyback, and SEPIC converters. It operates with a wide supply voltage range of 2.97 V to 40 V and supports adjustable switching frequencies from 100 kHz to 1 MHz. The LM3478QMM/NOPB features a fixed frequency, Pulse Width Modulated (PWM) current mode control architecture, which provides superior bandwidth and transient response. It also includes internal soft-start, thermal shutdown, and overvoltage protection, making it a robust solution for power management applications.

Key Specifications

ParameterMinTypMaxUnit
Supply Voltage2.97-40V
Switching Frequency100 kHz-1 MHz-
Peak Driver Output Current--1 A-
Junction Temperature Range-40-125°C
Shutdown Current--10 µA-
Internal Reference Voltage-1.26-V
Thermal Shutdown Temperature--165°C
Thermal Shutdown Hysteresis--10°C

Key Features

  • Internal Push-Pull Driver With 1-A Peak Current Capability
  • Current Limit and Thermal Shutdown
  • Frequency Compensation Optimized With a Capacitor and a Resistor
  • Internal Soft Start
  • Current Mode Operation
  • Undervoltage Lockout With Hysteresis
  • Overvoltage Protection (OVP)
  • Adjustable Switching Frequency (100 kHz to 1 MHz)
  • ±2.5% (Over Temperature) Internal Reference
  • Low Shutdown Current (10 µA)

Applications

  • Distributed Power Systems
  • Battery Chargers
  • Offline Power Supplies
  • Telecom Power Supplies
  • Automotive Power Systems

Q & A

  1. What is the LM3478QMM/NOPB used for? The LM3478QMM/NOPB is used as a high-efficiency low-side N-Channel MOSFET controller for switching regulators in various power management applications.
  2. What is the operating voltage range of the LM3478QMM/NOPB? The operating voltage range is from 2.97 V to 40 V.
  3. What are the adjustable switching frequency ranges of the LM3478QMM/NOPB? The switching frequency can be adjusted between 100 kHz and 1 MHz.
  4. Does the LM3478QMM/NOPB have overvoltage protection? Yes, it includes overvoltage protection (OVP) to prevent the output voltage from rising beyond a specified limit.
  5. What is the peak driver output current of the LM3478QMM/NOPB? The peak driver output current is 1 A.
  6. What is the shutdown current of the LM3478QMM/NOPB? The shutdown current is 10 µA.
  7. What are the package options for the LM3478QMM/NOPB? It is available in 8-lead VSSOP-8 and SOIC-8 packages.
  8. Does the LM3478QMM/NOPB support automotive applications? Yes, the LM3478Q-Q1 version is AEC-Q100 qualified and suitable for automotive applications.
  9. What is the internal reference voltage of the LM3478QMM/NOPB? The internal reference voltage is 1.26 V.
  10. What is the thermal shutdown temperature of the LM3478QMM/NOPB? The thermal shutdown temperature is 165°C.

Product Attributes

Output Type:Transistor Driver
Function:Step-Up, Step-Up/Step-Down
Output Configuration:Positive
Topology:Boost, Flyback, SEPIC
Number of Outputs:1
Output Phases:1
Voltage - Supply (Vcc/Vdd):2.97V ~ 40V
Frequency - Switching:100kHz ~ 1MHz
Duty Cycle (Max):100%
Synchronous Rectifier:No
Clock Sync:No
Serial Interfaces:- 
Control Features:Enable, Frequency Control
Operating Temperature:-40°C ~ 125°C (TJ)
Mounting Type:Surface Mount
Package / Case:8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package:8-VSSOP
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Similar Products

Part Number LM3478QMM/NOPB LM3488QMM/NOPB LM3478QMMX/NOPB LM3478MM/NOPB
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Active
Output Type Transistor Driver Transistor Driver Transistor Driver Transistor Driver
Function Step-Up, Step-Up/Step-Down Step-Up, Step-Up/Step-Down Step-Up, Step-Up/Step-Down Step-Up, Step-Up/Step-Down
Output Configuration Positive Positive Positive Positive
Topology Boost, Flyback, SEPIC Boost, Flyback, SEPIC Boost, Flyback, SEPIC Boost, Flyback, SEPIC
Number of Outputs 1 1 1 1
Output Phases 1 1 1 1
Voltage - Supply (Vcc/Vdd) 2.97V ~ 40V 2.97V ~ 40V 2.97V ~ 40V 2.97V ~ 40V
Frequency - Switching 100kHz ~ 1MHz 100kHz ~ 1MHz 100kHz ~ 1MHz 100kHz ~ 1MHz
Duty Cycle (Max) 100% 100% 100% 100%
Synchronous Rectifier No No No No
Clock Sync No Yes No No
Serial Interfaces - - - -
Control Features Enable, Frequency Control Enable, Frequency Control Enable, Frequency Control Enable, Frequency Control
Operating Temperature -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ)
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package 8-VSSOP 8-VSSOP 8-VSSOP 8-VSSOP

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