L4962EH/A

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PMIC - Voltage Regulators - DC DC Switching Regulators are one of the most important electrical components for regulating voltages in electrical and electronic systems. The L4962EH/A is a high-efficiency, low-noise DC-DC switching regulator that can be used to provide the needed voltage regulation for such systems. This article will explore the application fields and working principle of the L4962EH/A.

Application Fields

The L4962EH/A can be used in a variety of systems that require efficient voltage regulation, including industrial controllers, automotive, communications, and audio electronics. Its low noise operation makes it an ideal regulator for audio applications, those requiring very low output noise levels. Its high efficiency makes the L4962EH/A a good choice for use in systems where very low power is available.

In automotive applications, the L4962EH/A can be used as a voltage regulator to provide the necessary voltage levels for devices such as oxygen sensors, airbags, seatbelt pretensions, and engine control units. The L4962EH/A also has a wide operating temperature range, making it suitable for automotive applications in which there may be large temperature changes.

In general, the L4962EH/A is a good choice for those wanting a high-efficiency, low-noise voltage regulator with wide application possibilities.

Working Principle

The L4962EH/A is a DC-DC switching regulator, which means it uses a switching circuit to convert an input voltage to a higher or lower output voltage in an efficient manner. It is a simple, two-stage switching regulator. The input voltage is first stepped down through a pulse-width-modulated, synchronous rectifier-based buck converter, and then the output voltage is further regulated and stabilized by a linear regulator.

The synchronous rectifier-based buck converter takes full advantage of a process called "energy recycled switching," which allows the L4962EH/A to achieve greater than 95% efficiency. During the process, the input voltage is switched on and off and the current through the inductor is accordingly changed, creating a self-sustaining "recycling" cycle. The cycle continues to operate until the input voltage and output voltage reach the set limit, whereupon the regulator switches back to the linear regulator in order to maintain the desired output voltage.

The linear regulator then works to keep the output voltage constant, using Voltage Error Amplifier (VEA) to detect any change in the output voltage. Once detected, the VEA then sends out an error signal, which is then used to adjust the control voltage, in turn controlling the linear regulator so that the output voltage reaches the desired level. This way, the L4962EH/A is able to offer good stability under significantly varying input conditions.

Conclusion

In conclusion, the L4962EH/A is a high-efficiency, low-noise DC-DC switching regulator that can be used to provide the needed voltage regulation for many types of industrial, automotive, communications and audio electronic applications. Its two-stage switching regulator, combined with its energy recycled switching feature, allows it to achieve a high level of efficiency, while its linear regulator ensures good stability of its output voltage.

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