Texas Instruments LM3481MM

Description

The LM3481 is a versatile Low-Side N-FET high performance controller for switching regulators. It is suitable for use in topologies requiring a low-sideFET, such as boost, flyback, SEPIC, etc. The LM3481 can be operated at extremely high switching frequencies in order to reduce the overall solutionsize. The switching frequency of the LM3481 can be adjusted to any value between 100 kHz and 1 MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control providessuperior bandwidth and transient response in addition to cycle-by-cycle current limiting. Current limit can be programmed with a single external resistor.The LM3481 has built in protection features such as thermal shutdown, short-circuit protection and over voltage protection. Power saving shutdown mode reduces the total supply current to 5µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.

Features

• 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 1A 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

Remarks:"330mW AC or DC Tiny Flyback Converter Power Supply Reference Design User Guide "L1,L2=2.2mH Refer page no.3

Typical applications

• Automotive Start-Stop Applications
• Set-Top Boxes
• One Cell/Two Cell Li-ion Battery Powered
• Offline Power Supplies
• Notebooks, PDAs, Digital Cameras, and Other
• Automotive ADAS Driver Information
• Boost for Audio Amplifiers

More information

• Datasheet
• IC product information