PT6719N

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DC to DC converters, also known as DC to DC switching regulators, are electronic devices used to efficiently convert direct current (DC) voltage from one level to another. PT6719N is one of the most popular DC to DC converters in the market today.PT6719N is a single-chip, synchronous step-down converter with an integrated low side N-channel MOSFET for supplying up to 3A of output current from an input voltage of 4.75V to 30V. PT6719N has a wide variety of applications and is suitable for general purpose use in automotive, consumer, and industrial applications.

Application expertise

PT6719N is an ideal solution for automotive infotainment systems that require stable power and high efficiency. Its wide input voltage range allows it to take input supply from the battery directly. Since the power devices of thePT6719N are integrated in thechip, the solution size is small and it requires fewer external components. In applications like LCD TV or displays, the PT6719N eliminates the need for voltage regulation at theinternal power node. It also reduces heat generation by increasing the overall system efficiency.

In industrial applications such as motor drives, factory automation, power supplies and LED lighting, the PT6719N is a great choice because of its high efficiency, fast transient response and low output ripple. Also, this converter offers great flexibility as the output voltage can be easily programmed using a single resistor.

Working principle

PT6719N follows a buck topology and utilizes synchronousrectification technique to deliver high efficiency. It provides excellent protection features to protect the device from over-voltage, over-current, over-temperature, etc. The control loop is also adjustable using an external control pin.

In normal step-down DC to DC converters, the switch is open during the OFF-time of the cycle, allowing an equal amount of current to flow from the input source to the output load. But in synchronous rectification, both transistors are enabled and the body diode of the lower transistor is eliminated, resulting in ultra-low conduction losses.

PT6719N is equipped with a PFM (Pulse Frequency Modulation) control that allows it to automatically adjust the switching frequency of the converter. This not only gives high efficiency but also provides good transient response and a small output ripple. Moreover, the output voltage can be easily adjusted using an external resistor connected between the FB (Feedback) pin and GND.

Conclusion

PT6719N is a highly advanced synchronous step-down DC to DC converter with an integrated low side N-channel MOSFET. It offers wide input voltage range and high efficiency. PT6719N can be used in automotive, consumer, and industrial applications including LCD TV, infotainment systems, motor drives, factory automation, power supplies, and LED lighting. It also features excellent protection features and adjustable control loop.

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