LM3478MAX/NOPB

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LM3478MAX/NOPB

IC REG CTRLR MULT TOPOLOGY 8SOIC

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  • Fr. Teil #LM3478MAX/NOPB
  • Paket SOIC (D)-8
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Spezifikationen

Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
OutputType Transistor Driver
Function Step-Up, Step-Up/Step-Down
OutputConfiguration Positive
Topology Boost, Flyback, SEPIC
NumberofOutputs 1
OutputPhases 1
Voltage-Supply(Vcc/Vdd) 2.97V ~ 40V
Frequency-Switching 100kHz ~ 1MHz
DutyCycle(Max) 100%
SynchronousRectifier No
ClockSync No
ControlFeatures Enable, Frequency Control
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Surface Mount
Package/Case 8-SOIC (0.154, 3.90mm Width)

Übersicht

Description

The LM3478MAX/NOPB is a versatile, high-efficiency switching regulator controller from Texas Instruments. It is primarily used for boost, SEPIC, and flyback converter applications. The device can operate over a wide input voltage range of 2.97V to 40V, making it suitable for various applications, including automotive systems, industrial power supplies, and consumer electronics.
Key features of the LM3478 include its high switching frequency capability up to 1 MHz, which allows for the use of smaller external components, leading to more compact designs. It also features a high output drive capability suitable for driving N-channel MOSFETs, and built-in protection features such as thermal shutdown and current limiting. The device uses a current mode control scheme, which provides improved transient response and ease of loop compensation.
The "NOPB" designation indicates that this version is lead-free and complies with RoHS standards. Overall, the LM3478MAX/NOPB offers a flexible and efficient solution for designers looking to implement boost or similar power conversion topologies in their systems.

Features

The LM3478MAX/NOPB is a versatile high-efficiency switch-mode controller specifically designed for boost, flyback, SEPIC, and inverting power supply applications. Key features include:
1. Wide Input Voltage Range: It supports an input voltage range from 2.97V to 40V, making it suitable for a variety of applications.

2. High Switching Frequency: Offers a programmable switching frequency up to 1 MHz, allowing for smaller external components and compact designs.
3. Current Mode Control: Utilizes a current mode control scheme that provides superior load and line regulation.
4. Adjustable Output Voltage: The device enables output voltage regulation with easy programmability and flexibility.
5. Low Shutdown Current: Features a low shutdown current consumption of 5 µA, enhancing energy efficiency when the device is not in use.
6. Internal Compensation: Integrated compensation simplifies the design process and helps to reduce the number of external components needed.
7. Thermal Shutdown: Includes thermal shutdown protection to prevent overheating and ensure reliability.
8. Peak Current Limit: Offers an adjustable peak current limit for added protection and control over the design parameters.
These features make the LM3478MAX/NOPB a robust choice for designers needing a reliable and efficient power management solution.

Package

The LM3478MAX/NOPB is a high-efficiency single-channel boost controller integrated in a SOIC-8 (Small Outline Integrated Circuit) package. It's designed for voltage regulation applications and is suitable for portable electronic devices due to its compact form factor.

Pinout

The LM3478MAX/NOPB is a high-efficiency, wide input range, current-mode, DC-DC controller from Texas Instruments. It is primarily used for boost, flyback, SEPIC, and forward converter applications.
This device comes in an 8-pin package, specifically the SOIC-8 (Small Outline Integrated Circuit) form factor. Here's a brief overview of the pin functions:
1. COMP: Compensation pin for stability and transient response.
2. FB: Feedback pin for voltage regulation by monitoring the output.
3. AGND: Analog ground reference for signal ground connections.
4. ISEN: Current sense pin for measuring the inductor current.
5. SW: Switch pin for connecting to the inductor and diode.
6. VCC: Supply voltage pin providing power to the IC.
7. RST (or UVLO): Reset or undervoltage lockout pin.
8. GND: Ground pin for power ground connections.
The LM3478 provides flexibility and efficiency for designing various power supply applications, supporting a wide input voltage range, and offering features like current-mode control for better dynamic performance.

Manufacturer

The LM3478MAX/NOPB is manufactured by Texas Instruments. Texas Instruments (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits. TI is one of the largest semiconductor companies in the world, with a product portfolio that includes amplifiers, data converters, power management chips, microcontrollers, and processors, among others. The company serves a wide array of markets, including automotive, industrial, consumer electronics, and communications equipment. Known for its innovation and high-quality products, Texas Instruments plays a significant role in the technology and electronics industries.

Application

The LM3478MAX/NOPB is a versatile high-efficiency switching regulator controller used in various applications. It is suitable for boost, SEPIC, flyback, and inverting converter designs. Common application areas include automotive systems, telecommunications, industrial power supplies, distributed power systems, and battery-powered devices. Its ability to operate over a wide input voltage range and deliver high output power makes it ideal for use in portable electronics, LED drivers, and other systems requiring efficient voltage regulation.

Equivalent

The LM3478MAX/NOPB is a switching regulator controller from Texas Instruments. Equivalent products with similar functionalities include:
1. LM3478MM/NOPB - Another variant by Texas Instruments.
2. LT3757 - From Analog Devices, a high-performance boost controller.
3. MC34063A - From ON Semiconductor, a DC-DC converter.
4. LTC1871 - From Analog Devices, a wide input range controller.
Always check the specific requirements and datasheets to ensure compatibility.

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