Texas Instruments’ LM3481MMX/NOPB high-efficiency controller
Low-side N-FET high-performance controllers are electronic circuits that control the switching of N-channel MOSFETs (N-FETs) connected to the ground side of load in applications like power management, motor control, and DC-DC converters. These controllers drive the gate of the N-FET, allowing it to turn on and off rapidly, thereby managing power delivery with minimal losses. Its high-performance characteristics, such as fast switching times and low on-resistance, make it best for applications requiring efficient energy conversion and thermal management.
A commonly used low-side N-FET high-performance controller is the LM3481. It is employed in boost converters, single-ended primary-inductor converters (SEPIC), and flyback converters and topologies that need a low-side FET as the primary switch. For the best PCB design, engineers should leverage information, such as features, applications, and specifications, from Texas Instruments’ LM3481 datasheet.
LM3481 Datasheet: Features and Applications
The LM3481 is a versatile low-side N-FET high-performance controller for switching regulators. Its features and applications, as described in the datasheet, are listed below.
The LM3481 can operate at very high switching frequencies. A single external resistor or an external clock can be used to adjust the switching frequency of the LM3481 to values between 100 kHz and 1 MHz. With the use of current mode control, engineers can achieve superior bandwidth and transient response, as well as cycle-by-cycle current limiting. A single external resistor can be used to set the current limit.
LM3481: Parameters and Specifications
According to the datasheet, the LM3481 has the following absolute maximum electrical and thermal ratings:
Understanding electrical characteristics also aids in compliance with industry standards, leading to more sustainable and cost-effective solutions in a range of applications.
LM3481: Layout and Operation
The component pinout and functional diagram provided in the LM3481 datasheet, is shown below.
LM3481 component pinout and functional diagram
PCB Design and the LM3481 Datasheet
LM3481 datasheet information is helpful, but it is not recommended to create PCB footprints manually. It is relatively easy to make mistakes, which can lead to redesigns, turnaround time delays, and additional costs.
LM3481 schematic symbol, footprint, and 3D CAD model from Ultra Librarian
A more reliable approach is to obtain schematic symbols, footprints, and 3D CAD models from a reputable source, such as Ultra Librarian, and procure the LM3481 from a reputable distributor.
If you’re looking for CAD models for common components or important design information like how to best use the LM3481 datasheet for your PCB project, Ultra Librarian helps by compiling all your sourcing and CAD information in one place.
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