LNK304G-TL

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The LNK304G-TL is a monolithic integrated power management circuit, belonging to the category of PMIC - AC DC Converters, Offline Switchers. It is specifically designed for offline, switch-mode power supplies consisting of minimal external components.

The device features two alternatives for energy-saving standby modes, burst mode operation and averaged current-mode control, as well as leading household appliances like TV, DVD and so on. With it, you can have the rest assured that it provides a lower power loss and reduced audible noise.

Working Principle

The key to the LNK304G-TL\'s efficient performance is its oscillation control. In plain terms, the current in each cycle of pulse width modulated (PWM) control is monitored and kept constant. A peak current-mode control technique is then used for active regulation of the output voltage accuracy and stability. This process, coupled with the excellent line and load regulation, gives a high power conversion efficiency.

The device utilizes a transformer as an electrical power source, which is then isolated from the load by optical coupler (PC817). This process creates a power circuit that provides reliable protection between the power supply and the powered equipment. The transformer is connected to a pulse-width-modulated (PWM) full-bridge to the optocoupler. The outputs are then rectified and filtered to produce an AC voltage input.

The optocoupler turns on the PWM switch at each cycle, and the output of the PWM is varied depending on the output voltage setting made. The circuit also utilizes a unique controlling technology to minimize the switching noise. As the current rises, the feedback from the transformer triggers the feedback circuit, thus limiting the current to a programmed value.

Application Field

The features of LNK304G-TL make it an ideal choice for power management applications in the consumer, industrial, telecom and IT industries. It offers compatibility with most voltage ranges, especially the common AC lines and universal AC input stages. As such, it is highly applicable in the manufacturing and renovation of a number of devices, such as switch-mode power supplies, motor drivers, power tools and automation equipment.

The device also allows for connection to a wide range of external components, including resistors, capacitors and diodes, enabling easy integration into existing systems. An LED driver is also included, allowing easy connection to LED indicators. All this makes the LNK304G-TL an ideal choice for automatically controlling the input current and providing reliable output power.

The device is also very power efficient, reaching a maximum of 86 percent efficiency at low output powers (below 10 watts). This is perfect for applications that require a high level of power efficiency with minimal external components.

The LNK304G-TL is an ideal choice for a number of applications. It offers reliable performance, cost-effectiveness and universal AC input stages, making it suitable for a variety of industrial and consumer applications.

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