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LM3481-Q1

Part Number	LM3481-Q1
Manufacturer	Texas Instruments
Description	High-Efficiency Controller
Published	Apr 8, 2020
Detailed Description	Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3481, LM3481-Q1 SNVS346F – N...
Datasheet	LM3481-Q1 PDF File

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3481, LM3481-Q1 SNVS346F – NOVEMBER 2007 – REVISED NOVEMBER 2014 LM3481 / -Q1 High-Efficiency Controller for Boost, SEPIC and Flyback DC-DC Converters 1 Features •1 LM3481QMM are Automotive-Grade Products That are AEC-Q100 Grade 1 Qualified (–40°C to +125°C Operating Junction Temperature) • 10-Lead VSSOP Package • 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 Softstart • Current Mode Operation • Adjustable Undervoltage Lockout With Hysteresis • Pulse Skipping at Light Loads • Key Specifications – Wide Supply Voltage Range of 2.
97 V to 48 V – 100-kHz to 1-MHz Adjustable and Synchronizable Clock Frequency – ±1.
5% (Over Temperature) Internal Reference – 10-µA Shutdown Current (Over Temperature) • Create a Custom Design Using the LM3481 with the WEBENCH Power Designer 2 Applications • Automotive Start-Stop Applications • Automotive ADAS Driver Information • One Cell/Two Cell Li-ion Battery Powered Portable Bluetooth Audio Systems • Notebooks, PDAs, Digital Cameras, and Other Portable Applications • Offline Power Supplies • Set-Top Boxes • Boost for Audio Amplifiers 3 Description The LM3481 device is a versatile Low-Side N-FET high-performance controller for switching regulators.
The device is designed for use in Boost, SEPIC and Flyback converters and topologies requiring a lowside FET as the primary switch.
The LM3481 device can be operated at very high switching frequencies to reduce the overall solution size.
The switching frequency of the LM3481 device can be adjusted to any value between 100kHz and 1MHz by using a single external resistor or by synchronizing it to an external clock.
Current mode control provides superior bandwidth and transient response in addition to cycle-by-cycle current limiting.
Current limit can be programmed with a single e...

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LM3481-Q1 High-Efficiency Controller - Texas Instruments

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