PT4222N

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DC-DC converters are widely used in various electronic equipment circuits to transform a DC voltage into a different DC voltage level. The converter needs to transfer the energy from the input to the output and make sure that no energy is wasted in the process. The PT4222N is a sophisticated and versatile DC-DC converter manufactured by Power Integration, suitable for various applications.

PT4222N Main Features

PT4222N is a low-side non-isolated buck converter featuring wide input voltage range up to 40V, high efficiency up to 95%, and fast transient response. It is available in SOT-23 package, with the output current up to 1.2A and output voltage adjustable from 0.8V to 28V. With its internal current limitation and short-circuit protection, it makes it ideal for GSM modules, LED lighting, set-top boxes, LCD TV power supplies, display panels, wireless communication systems, automotive accessories as well as game consoles.

How Does PT4222N Work?

PT4222N uses a combination of switching elements and control circuitry to transform a DC voltage into an output of a different voltage level. The switching element is usually an NMOS transistor or a PMOS transistor, operated at high frequency and with the help of a control IC, a converter can use the input voltage to generate a desired output voltage. The PT4222N uses a current-mode control architecture and incorporates frequent on-off cycles to convert the input voltage into the desired output voltage.

It has an internal over-current protection circuit, which ensures safety by limiting the amount of current flowing through the power MOSFET switch. The PT4222N also incorporates an internal soft-start feature to reduce the output overshoot at the start of operation. This feature works by gradually increasing the output voltage of the converter until it reaches its setpoint until the voltage reaches its setpoint.

PT4222N Application Field

PT4222N is designed for general purpose applications hence it can fit in a wide variety of applications. The device features a 0.8V start voltage, which is ideal for GSM modules, LED lighting systems, set-top boxes, game consoles, LCD TV power supplies and display panels. It can also be applied in wireless communication systems and automotive accessories.

As a result of its wide input voltage range up to 40V and output voltage range from 0.8V to 28V, the device offers a great deal of versatility for applications which need the input voltage to be varied in order to achieve the desired result.

Conclusion

PT4222N is a low-side non-isolated buck converter for applications which require a wide input voltage range and high efficiency. It features an internal over-current protection circuit for safety, as well as a soft-start feature to reduce output overshoot at the start of operation. It is ideal for GSM modules, LED lighting, set-top boxes, LCD TV power supplies, display panels, wireless communication systems, automotive accessories, as well as game consoles.

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