PT6621Q

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DC to DC converters are an integral part of many electronic systems, providing power to various subsystems and components from a single source. PT6621Q is a flyback transformer based DC to DC converter designed to provide a regulated output from an input voltage of 5V to 34V. The output voltage is adjustable and the maximum output power is 36W. This converter provides high efficiency, low ripple and excellent transient response, making it suitable for a range of applications.

Applications of the PT6621Q include powering electronic devices, such as cameras and active speakers, as well as powering microcontrollers, wireless modules and FPGAs. It is particularly suitable for applications which require a lot of power in a small package. It can also be used to supply power to embedded systems and industrial sensor networks.

The working principle of the PT6621Q is based on the flyback topology, meaning it stores energy in an inductor during each switching cycle, before converting it into output. The key components of the converter are a primary switch, an inductor and a secondary diode, as well as a primary feedback voltage control loop. The feedback loop senses the output voltage, and adjusts the switching duty cycle accordingly. The output voltage is changed by adjusting the inductor current. The primary switch is controlled by a high frequency oscillator, and as the frequency can be adjusted, so too can the output voltage.

The PT6621Q flyback converter has an integrated 250kHz oscillator, and features Over Current Protection (OCP) and Over Voltage Protection (OVP) for both the input and output. It also has Soft Start without load shedding. The OCP prevents the output current from exceeding a set current limit, while the OVP limits the output voltage when the output voltage exceeds a set level. The Soft Start ensures that the output voltage increases gradually to the desired level.

The PT6621Q is an efficient, compact converter. Its high efficiency and low ripple, combined with its ability to operate over a wide input voltage range, make it suitable for a range of applications. It can be used to power a variety of electronic devices, from small embedded systems to industrial sensor networks, and provides excellent transient response and protection.

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