TOP267KG

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Power management integrated circuits (PMIC) are incorporated in many electrical and electronic designs. PMICs are essential to the efficient operation of these systems, providing optimization of energy consumption, and improving performance. The TOP267KG is one type of PMIC and it is employed in designs for AC DC converters, offline switchers and other power control applications.

TOP267KG is a monolithic current-mode integrated circuit designed specifically to control medium power off-line SMPS (Switch Mode Power Supplies) with minimal external components. It operates as an oscillator configured to provide a give switching frequency; typically at 49 kHz to 53 kHz. This ensures compatibility with EMI regulations, while output voltage is sensed via an external resistor divider and voltage feedback to the power IC, which regulates the output voltage accordingly. The required power level or output current is regulated by measuring the current conducted via the Power Switch and comparing it with a reference level normally provided by an external resistor.

The integrated circuit uses a variable frequency operating principle, allowing the power factor to be regulated according to the load level. The average control system within the IC limits the power through the switching element (Power Switch) by sensing the amount of current that the switch is drawing. The current sensed is compared with a reference level and if the switch current is greater than the reference level, it is turned off.

The primary benefit of using a TOP267KG is that it provides high power efficiency. By integrating a number of functions into one integrated circuit, complex power control circuitry is simplified and the number of components required is drastically reduced; both of which improve energy efficiency. In addition, the integration of a comprehensive control system ensures accurate regulation of voltage and current. This can be further enhanced with the inclusion of an under-voltage lockout (UVLO) feature, that prevents the switching element from being turned on when the input voltage is too low.

Moreover, the TOP267KG is protected against a number of critical faults. It contains an short circuit protection which monitors current between the output and the IC’s ground, if the current exceeds a predetermined level, the switch will be turned off. It also provides thermal protection against excessive conditions and over-voltage protection against high output voltages.

In conclusion, the TOP267KG PMIC offers a number of advantages over traditional AC DC converters and offline switchers. It’s highly integrated design reduces the number of components required and improves power efficiency. Furthermore, it provides extra safety features such as over-voltage, under-voltage, short-circuit, and thermal protection, making it suitable for power control applications.

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