TOP271EG

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The power management integrated circuits (PMICs) are integrated circuits or ICs used to enhance the performance of various applications in the field of power management. In particular, AC/DC converters, offline switchers and TOP271EG are among the most popular PMICs used in various applications. In this article, we will discuss the application field and working principle of the TOP271EG.

The TOP271EG is an integrated offline switcher IC with AC/DC LT3757/Nano LT3757 converter. It has an extended PWM operating frequency up to 350 kHz, which allows for higher efficiency and improved power dissipation. This IC also features a low quiescent current, extended accuracy of peak current sensing, diagnostic features, soft start, and the ability to auto-restart after a fault condition. It is ideal for applications that require high efficiency and low ripple in low power offline switcher applications such as adapter and battery charger, LCD/LED TV, cordless phone, gaming audio, DSL modem, notebook PC, portable medical device, etc.

In terms of the working principle, the TOP271EG offline switcher is based on voltage mode control technology. The input voltage of the TOP271EG is fed to the step-down regulator, which reduces the voltage and provides constant output voltage. The voltage mode control provides the current to the power switch, which increases the voltage to the desired output voltage. The constant output voltage enables proper control even in a wide variation in input voltage. This allows the TOP271EG to reduce power consumption and thus improve system performance while maintaining reliability in high temperature applications.

In addition, the TOP271EG provides robust protection features such as thermal protection, overload protection, and over voltage protection. These features protect the circuit from any external overload or over-voltage, which may cause device damage or system failure. The device also features the soft start function, which gradually increases the output voltage from low to high to reduce the inrush current and avoid noise during start up.

In conclusion, TOP271EG is a versatile power management IC that is used in a variety of applications. It provides an integrated offline switcher with an AC/DC LT3757/Nano LT3757 converter, which enables extended PWM operating frequency up to 350 kHz, low quiescent current, and extended accuracy of peak current sensing. In addition, it provides robust protection features such as thermal protection, overload protection, and over voltage protection. This device is perfect for applications that require high efficiency and low ripple in low power offline switcher applications.

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