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PQ1U251M2ZPH Application Field and Working Principle

The PQ1U251M2ZPH is a linear voltage regulator manufactured by Panasonic. This regulator is designed for use in both standard and low-voltage AC/DC applications. It is capable of controlling voltages from 0.2 to 30 VDC.

The PQ1U251M2ZPH is used in a variety of applications including automotive, industrial, telecommunications, audio/video, and machine systems in general. It is rated to operate over a temperature range from -40 to +105°C, with a maximum output current of 3.0 A.

Working Principle

The regulator works by comparing the reference voltage to an amplified version of the output voltage. The difference between the two voltages is then amplified and used to drive the output stage, to maintain the desired voltage at the output terminals.

The regulator consists of four stages: the input voltage stage, the comparison stage, the output stage and the feedback network. The input voltage is received in the input stage, where it is conditioned before being forwarded to the comparison stage. This stage amplifies the input voltage and then compares this voltage to the reference voltage.

The comparison stage then generates an error signal which is then used to drive the output stage. This stage consists of an amplifier, a reference voltage generator and a power MOSFET that controls the output voltage. The feedback network is then used to maintain the desired output voltage.

The regulator is also equipped with several protection features, such as overvoltage, over-temperature, under-voltage and over-current protection. These features ensure that the regulator is safe and reliable to use in a variety of applications.

Conclusion

The PQ1U251M2ZPH linear voltage regulator from Panasonic is designed for use in both standard and low-voltage AC/DC applications. It features an input voltage range from 0.2 to 30 VDC, with a maximum output current of 3.0 A. The regulator works by comparing the reference voltage to an amplified version of the output voltage, and then uses this difference to drive the output stage and maintain the desired voltage. It is also equipped with several protection features to ensure safe and reliable operation.

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