L4984D

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The L4984D is an integrated circuit that is used in power factor correction (PFC) applications. This device is designed to improve the efficiency of the power conversion process by improving the input current waveform of the power supply. Here, the device works by rectifying the AC input line current and controlling it such that its average value is kept close to the average value of the line voltage.

The device integrates many components that are necessary for a complete PFC system, such as a rectifier, a current sense amplifier, a voltage reference, a fixed frequency PWM controller, and a MOSFET driver. These components are necessary for a successful implementation of PFC.

The L4984D operates in three modes: standby, peak current mode, and continuous conduction mode. In the standby mode, the power supply is not supplying any output power. In the peak current mode, the controller operates in an intermittent mode with an adjustable current limit. In the continuous conduction mode, the controller adjusts the current limit so that a quasi-sinusoidal shape is maintained in the current waveform.

The power factor corrections system is based on the principles of regulated control and voltage-current transformations. The system acts as a current transducer, which measures the difference between the actual line current and the reference current. This difference is then used as a feedback signal to modulate the selectable switching frequency of the power supply.

The L4984D also features protection systems for the power supply, such as over-voltage, over-current, over-temperature, under-voltage, and current limiting. All of these features make the L4984D a cost-effective, efficient, and reliable component for PFC applications.

The L4984D is well suited for use in a variety of power factor-corrected applications such as lighting, motor drives, server power supplies, consumer electronics, voltage sources, and unreliable grid applications. The device is also versatile enough to be used in both off-line and on-line applications.

In summary, the integrated circuit L4984D is a highly advanced power factor correction IC with multiple integrated protection systems and efficient PFC control. Its wide range of application fields makes it a versatile and cost-effective component for power conversion applications.

The specific data is subject to PDF, and the above content is for reference