LM2678SDX-12

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LM2678SDX-12 Application Field and Working Principle

Introduction: LM2678SDX-12 is a monolithic synchronous buck converters featuring maximum and minimum voltage regulation. It allows adjustable power up to 12V and high efficiency up to 94%. The device uses a 6-step phase-shedding architecture to reduce current ripple and switching losses. It is well suited for tasks including power systems for motor control systems, portable powered audio amplifiers, industrial and communication systems, embedded power apps, point-of-load power applications.

Application Field: The LM2678SDX-12 is a compact DC-DC converter that is ideal for applications that require lower voltage level power-supply and high efficiency. It can be used in automotive, industrial, server and telecommunication applications. This device is particularly used in motor control systems, powered audio amplifiers, embedded power applications, point-of-load power systems and power tools.

Working Principles: The LM2678SDX-12 is a DC-DC synchronous buck converter featuring maximum and minimum voltage regulation. The device uses a 6-step phase mid-band shedding (PB) architecture to reduce input voltage ripple, current ripple and switching losses. This device provides maximum and minimum voltage protection through sensing the output voltage directly from the output pins. The overvolatge protection circuit senses the output voltage and will shut down the converter when the output voltage goes above its preset maximum or below its preset minimum levels.

The LM2678SDX-12 can also offer input voltage protection. It includes an external resistor and capacitor network connected to the power input pins to enable the converter to reset its operating state if an abnormal input voltage condition is detected. The device also supplies an adjustable soft-start, allowing the output voltage to smoothly rise from the low value it was initialized to the programmed level. The device also features current sensing capabilities to reduce the switch losses.

Conclusion: The LM2678SDX-12 is a high efficiency and compact DC-DC converter that is ideal for numerous applications. The device excels for its feature of maximum and minimum voltage regulation, 6-step phase mid-band shedding architecture, input voltage protection, adjustable soft-start, and current sensing capabilities. With all these features together, the LM2678SDX-12 is an excellent choice for a wide variety of power applications.

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