l4981ad ic, l4981ad ic Suppliers and Manufacturers

The L4981AD IC， also known as the L4981A， is a highly efficient voltage-mode PWM controller used in power factor correction circuits. It is designed to control the power factor correction stage in an offline converter， specifically for applications requiring input power between 100W and 300W.

One of the key features of the L4981AD is its ability to drive both a power MOSFET and a synchronous rectifier， which enables high efficiency and reduced losses. This IC operates in discontinuous current mode， ensuring a constant output power regardless of line input conditions.

The L4981AD integrates several protection features to ensure safe operation. It incorporates a leading-edge blanking (LEB) circuit， which prevents the controller from reacting to voltage transients during the start-up phase. This protection feature helps to avoid spurious activations of the overcurrent protection， ensuring a smooth start-up operation.

Furthermore， it includes a programmable soft-start function that limits inrush current during start-up， reducing stress on components such as the input bridge rectifier. The L4981AD also integrates a brownout function that shuts down the power supply when the input voltage drops below a certain threshold， protecting the circuit from potential damage.

Suppliers and manufacturers of the L4981AD IC can be found worldwide， catering to the increasing demand for power factor correction solutions. These suppliers offer a wide range of options to choose from， ensuring availability and flexibility for various application requirements.

When selecting a supplier or manufacturer for the L4981AD IC， it is essential to consider factors such as product quality， reputation， and customer support. Reliable suppliers provide authentic components， ensuring optimal performance and longevity of the power factor correction circuits.

Moreover， manufacturers who offer technical support and provide datasheets， application notes， and reference designs are particularly advantageous. The L4981AD IC requires careful consideration when integrating it into power factor correction circuits， and having access to comprehensive technical resources can simplify the design process.

Furthermore， it is advisable to choose suppliers who align with industry standards and certifications. These certifications ensure that the L4981AD IC undergoes rigorous testing processes to meet quality and safety requirements.

In conclusion， the L4981AD IC is a highly efficient voltage-mode PWM controller that enables efficient power factor correction in the range of 100W to 300W. It is equipped with various protection features， including leading-edge blanking and brownout function. Suppliers and manufacturers worldwide offer a wide variety of options for the L4981AD IC， catering to different application needs. When selecting a supplier or manufacturer， considering factors such as product quality， reputation， customer support， and adherence to industry standards is crucial.