STR-W6756N

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Power management integrated circuits (PMICs) enable more efficient and reliable power management of a circuit, particularly important in systems where saving energy is highly important such as in portable applications. Among many power management ICs, AC DC converters, offline switchers are highly essential when dealing with power stages. The STR-W6756N IC is one such IC which is extensively used in many applications as an AC/DC converter, offline switcher, and step-down voltage converter.

The main aim of the STR-W6756N is to convert the input voltage ranging from 9V to 285V AC/DC to an appropriate constant output voltage of 3.3V to 50V. This IC is usually connected between the input and the output, the input being the higher voltage one and the output being the lower voltage one (step-down conversion). The STR-W6756N has different rectification methods depending on the input voltage and the load current. When the input voltage is below 120V and the load current is above 10A, it is better to use the forward current rectification as the primary rectification. When the input voltage is above 120V and the load current is below 10A, it is recommended to use the valve regulated rectification.In the case of step-down voltage conversion, the STR-W6756N includes a ‘quasi’ current source element in the switch off state to reduce the voltage spikes of the clamping diode. This reduces the excess energy consumption and provides a stable output. The integration of these features makes it the preferred choice for a wide range of applications that require precision in terms of voltage and current control.

The STR-W6756N is widely used in applications such as computer peripherals, office equipment, audio amplifiers, power supplies, and power conversion circuits. In these applications, the STR-W6756N provides an efficient and stable voltage and current control. The high integration level of the device makes it easy to maintain the output voltage and current over a wide AC/DC input range. When compared to discrete switching regulator configurations, the STR-W6756N offers lower power loss, more efficient and improved transient response, and higher voltage tolerance.The STR-W6756N is available in the popular 8-pin SO-8 and TO-220 packages, making it versatile and highly usable in many applications. The operating temperature range is -40°C to 125°C. With a high level of on-chip integration, the STR-W6756N offers a cost-effective and reliable power management solution for all kinds of applications.

In terms of functioning, the STR-W6756N is based upon the principle of self-supply using the output voltage. The switching regulator constantly monitors the output voltage. When the voltage gets too low, the regulator turns on the switch and supplies current to the output. When the voltage reaches its peak, the regulator turns off the switch and the cycle continues. This ensures that the output voltage is regulated regardless of the input voltage and load current. The balancing of the inductor’s current by adding a ‘sync charge’ is another important feature of the STR-W6756N which makes it highly efficient. This is done to maintain a stable output voltage while providing high efficiency. The ‘sync charge’ adds just enough energy to the inductor so that the current stops increasing and the output voltage remains stable.

The STR-W6756N can be used in a variety of topologies such as flyback, buck-boost, forward, and those derived from these. The wide range of operating frequencies and low noise operation makes the device highly suitable for many types of applications. The device also supports external synchronization and soft-start functions which improve system performance and operation.In conclusion, the STR-W6756N is an important IC among AC DC converters, offline switchers and provides a cost-effective and reliable power management solution. With its improved performance, low noise operation, wide operating range and increased integration, the STR-W6756N is ideal for a wide array of applications.

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