L4981BD013TR Integrated Circuits (ICs)

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Introduction

Power factor correction (PFC) is the process of adjusting the power supply in an electrical system in order to improve its power factor — the ratio of the real power flowing to the load for a given total power applied to the load. PMIC (Power Management IC) devices, such as the L4981BD013TR, are designed specifically to correct power factor.

Application Field of L4981BD013TR

The L4981BD013TR integrated circuit (IC) is a highly efficient power-factor-correction (PFC) controllers that combines boom current-mode control and boost diode emulation in the same device, suitable for up to 200W total-output power.

The L4981BD013TR is an ideal solution for applications that require power-factor correction such as lighting, network appliances, consumer electronics, and audio systems. The device also features an advanced implement-ability with up to 35% reduced external component count and a high-Temperature device performance rating.

Working Principle of L4981BD013TR

The L4981BD013TR works in conjunction with a boost diode, a capacitor, and an inductor to create the flyback topology required for power-factor correction. This device allows for a wide input voltage range of between 7V and 265V and will deliver an output voltage up to 400V.

The L4981BD013TR begins operations by sensing the input voltage and increasing the switching frequency and output voltage accordingly. It then changes the duration of the switching cycles in order to maintain the correct output voltage.When supplying non-linear loads, the L4981BD013TR seeks to bring the power factor of the system close to unity.

The device accomplishes this task by boosting the voltage of the alternating-current wave to the level at which the full-bridge rectifier can be fed. This increases the current supplied to smoothing inductor and enables the reactive power to become active. As a result, the power factor of the system increases.

Finally, the L4981BD013TR can be used to generate a feedback voltage for regulation of the output voltage. The device has built-in tolerances in order to guarantee a consistent current output even in the presence of varying load and input conditions.

Conclusion

PMIC devices like the L4981BD013TR represent a new generation of power-factor-correction devices with increased efficiency and reduced external components. By boosting the voltage of a wave signal and improving the system power factor, these devices are ideal for applications that require reliable, consistent power output.

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