TOP256GN-TL

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Power Management Integrated Circuits (PMICs) are integrated circuits used to manage power in modern electronic devices. They use an efficient combination of active and passive components to manage the power within a device, allowing it to be used for more efficient and reliable operations. The TOP256GN-TL is an AC DC converter and offline switcher specifically designed for use in off-line AC-DC power supplies. It is available in both a single and dual output configuration, providing up to 5A of output current. It is also offered in the SMD package, with a footprint size of 6mm X 6mm.

The TOP256GN-TL features an adaptive transition mode that not only improves the efficiency of the power supply unit but also provides high power factor (PF) performance. This reduces switching frequencies and can reduce total cost of ownership (TCO) of any system by reducing component count. Additionally, the TOP256GN-TL has an adjustable constant frequency oscillator (CFO) to reduce harmonics, which ensures compatibility with EMC standards. The device is also protected against input overvoltage, overcurrent, short circuit and thermal shutdown.

The TOP256GN-TL is designed to provide a high-performance ac/dc solution for applications requiring a high efficiency and low noise ac/dc converter. Its application field consists of offline SMPS, external AC/DC adapters, TV set-top boxes, LCD/LED monitors and televisions, game consoles, and other general-purpose power supplies. It is also suitable for low power, portable applications such as notebook adapters and USB chargers.

The TOP256GN-TL works on a fixed frequency switching converter. This means that the internal oscillator is constantly set at a fixed frequency, and therefore determines the power efficiency of the power supply. In order to understand the basic working principle behind the TOP256GN-TL, it is necessary to understand the components and design of the converter. It is composed of three main components – a rectifier, an inductor, and a power switch.

The rectifier receives the AC power and converts it to the DC voltage. The inductor is then used to filter out any transient and high frequency components, and the power switch is used to control the release of stored energy from the inductor.

After being rectified and filtered, the DC voltage is then output. The working principles of the TOP256GN-TL power supply device involve controlling the release of the stored energy from the inductor and ensuring that the correct output voltage is achieved. When the power switch is turned on, power from the rectifier is drawn through the inductor, and stored energy is released to the load, resulting in the desired DC voltage.

When the power switch is turned off, the stored energy in the inductor is used to keep the load running, until the switch is turned on again. This technique is known as "skipping" and allows the TOP256GN-TL to maintain the target voltage even if the AC voltage drops. This process ensures that the output voltage is always maintained.

Overall, the TOP256GN-TL is a highly efficient and reliable AC/DC converters and offline switchers designed for applications requiring high efficiency and low noise. It provides a high power factor performance and is protected against input overvoltage, overcurrent, short circuit and thermal shutdown. It is the perfect device for applications that require high performance and reliable operation.

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