PQA30-D24-S9-TH

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DC DC Converters

DC-DC converters are devices that are used to convert direct current (DC) input from one voltage level to another by using switching elements. The PQA30-D24-S9-TH is an example of a high-frequency DC-DC converter suitable for industrial, automotive, and other applications where noise and efficiency are critical. This article outlines the application field and working principle of the PQA30-D24-S9-TH.

Application Field

The PQA30-D24-S9-TH is a high-frequency, isolated DC-DC converter designed for use in applications such as automotive, solar, and wind-power systems. The device offers a wide input voltage range of 8V to 36V, making it suitable for automotive applications where the input voltage can fluctuate. Additionally, the device features a wide operating temperature range of –40°C to +100°C, making it ideal for applications where robustness in extreme temperatures is necessary.

The PQA30-D24-S9-TH is designed to operate in safety-critical and demanding environments with its high-reliability metal oxide semiconductor field-effect transistor (MOSFET) switching elements. The secondary side, isolated from the primary, is equipped with a wide floating output range, making it suitable for a variety of applications including low-power circuitry and analog signals.

The PQA30-D24-S9-TH is built with many integrated safety circuits, including input under-voltage protection, output overcurrent protection, inductor current sensing with over-temperature shutdown, and output short-circuit protection. These features are designed to protect devices from harm should an abnormal input voltage be applied. Additionally, the device’s design allows for high efficiency operation, reducing power consumption and resulting in lower costs.

Working Principle

The PQA30-D24-S9-TH is based on a synchronous buck topology. The primary side of the device is composed of a MOSFET switch, primary side inductor, and primary side diode. The switch opens and closes to step-down the input voltage to the desired output voltage, providing isolation from the primary to the secondary side. Two capacitors, one on the input and one on the output, store energy and further stabilize the system. The secondary side comprises of a MOSFET and a diode connected in a synchronous rectifier configuration, which allow for very efficient conversion of energy from the input voltage to the output voltage.

In order to regulate the output voltage of the PQA30-D24-S9-TH, a feedback controller circuit is used. This circuit compares the actual output voltage to an internally preset reference voltage and adjusts the duty cycle of the primary side MOSFET switch to achieve the desired output. The main advantage of the PQA30-D24-S9-TH is that it allows for a wide range of output voltages, from 9V to 24V, while only requiring a single input voltage.

Conclusion

The PQA30-D24-S9-TH is a high-frequency, isolated DC-DC converter suitable for automotive, solar, and wind-power applications. The device is designed to operate in a wide voltage and temperature range, making it ideal for safety-critical applications. In addition, the PQA30-D24-S9-TH has an integrated feedback controller, allowing for a wide range of output voltages with just a single input voltage. This makes it both cost-effective and energy-efficient, making it a great choice for a variety of applications.

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