L6564H

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Power Factor Correction (PFC), has become increasingly important in modern power systems as the demand for high efficiency, low standby power and enhanced power quality has grown. A common approach to PFC is to use a Power Factor Correction (PFC) controller, such as the L6564H, which works by optimizing the delivery of power from the AC main to the load.

The L6564H is an integrated two-stage PFC controller designed to meet the requirements of off-line switched mode power supplies. The chip itself is made up of a high voltage MOSFET driver, an adaptive switching frequency oscillator, and a closed loop control system. With its advanced performance and low cost, it is an excellent choice for projects requiring low standby power and high efficiency.

The L6564H employs a two-stage power conversion technique based on an active rectifier and active inverter circuit. The rectifier stage converts incoming AC power to DC, whereas the inverter acts as a voltage regulator. The chip features an advanced peak current control loop for optimized power transfer, allowing the rectifier stages to operate in discontinuous conduction mode (DCM) and reduce losses in the system.

In DCM operation, the chip monitors the input current. When it detects that the current has dropped to a predetermined level, it turns the power devices off. This reduces the amount of power dissipated in the system, resulting in reduced power consumption and improved power efficiency.

The L6564H also incorporates predictive Burst Mode operation. This feature enables the chip to automatically switch from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) when the input current reaches a predetermined level. This allows for a more efficient operation as the rectifier stages operate in an optimal mode of operation that helps to reduce losses.

The L6564H features integrated over-current protection (OCP) which ensures a safe operation when the load current exceeds its expected range. Additionally, the device is capable of controlling the power factor of the load, thus allowing the system to automatically adjust its output to meet the power requirements of the load. This feature is particularly useful when dealing with non-linear loads.

In addition to its integrated power factor correction (PFC) capabilities, the L6564H is designed to retrofit existing power supplies and provide high efficiency, low standby power and improved power quality. This makes the chip an ideal solution for a wide range of power applications including LED lighting, portable electronics, energy saving appliances and other consumer products.

Overall, the L6564H is an excellent choice for all your PFC requirements, offering high performance and low costs. With its advanced features and control capabilities, it is ideal for a wide range of applications including LED lighting, portable electronics, energy saving appliances and other consumer products.

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