AZ494CMTR-E1

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PMIC, or power management IC, is an integrated circuit containing circuitry for power conversion and regulation. In particular, DC DC Switching Regulators are PMICs that perform power conversion from one DC voltage level to another without the use of transformers. One example of such a DC DC Switching Regulator is the AZ494CMTR-E1.

Application Field

The AZ494CMTR-E1 is primarily used in automotive systems, providing a reliable source of 12V power for the many different systems that make up a modern car. It is also suitable for other types of applications, including portable electronics and telecommunications equipment, where a regulated source of 12V power is needed.

Working Principle

The AZ494CMTR-E1 is a “step-down” switching regulator, meaning that it takes in a higher voltage than the output. This type of switching regulator works by repeatedly switching an inductor between the input and output terminals, allowing for the conversion of voltages and currents.

The switching regulator is controlled by an oscillator that operates within a certain frequency range. The oscillator is connected to a “pulse-width modulator” which switches the inductor at predetermined intervals. As the inductor switches, the current is either stored in the inductor or released to the output, depending on the on/off state of the pulse-width modulator. The pulse-width modulator is controlled by a feedback loop, which ensures that the output voltage remains within specified limits.

The AZ494CMTR-E1 has an integrated safety feature that protects it from over-voltage, over-current, and thermal damage. It also features an integrated phase-locked loop, which is used to reduce the output voltage ripple and improve the overall power conversion efficiency.

Conclusion

The AZ494CMTR-E1 is a DC DC switching regulator that is used in automotive systems and other applications where a regulated source of 12V power is required. It works by repeatedly switching an inductor between the input and output terminals, and is controlled by an oscillator, pulse-width modulator, and feedback loop. It also features an integrated safety feature and phase-locked loop, which reduces the output voltage ripple and improve the overall power conversion efficiency.

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