PT4101C

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DC-DC converters are specialized power supplies that convert a direct current (DC) input voltage to a different DC output voltage. The PT4101C is a DC-DC converter module that includes an integrated field-effect transistor (FET) and a synchronous rectifier, making the integration of output power more efficient. These converters may utilize one of many diverse topologies like a buck, boost, buck/boost, inverting, or isolated. The PT4101C module is an integrated high-efficiency, non-isolated, synchronous buck DC-DC converter with programmable switching frequency as high as 1MHz.

Overview

The PT4101C module is an efficient, low-cost solution designed with a simplified external component count. It uses advanced circuit topology to take advantage of the switching losses to maximize efficiency from 1% to 100%. It supports wide input voltage of 6V to 36V and output voltage of 1.2V to 33V. Its integrated FET, synchronous rectifier, and internal compensation circuit make it highly reliable with excellent electrical performance.

Applications

The PT4101C DC-DC converter module is an ideal choice for embedded system power supplies, such as handheld devices, routers, and Li-ion battery chargers. Its power efficiency of up to 95% is suitable for a wide range of applications including automotive, industrial, and consumer electronics.

Working Principle

The PT4101C DC-DC converter works by converting the input voltage to the desired output voltage. It is based on the synchronous buck topology which uses two transistors, the high-side switch and the low-side switch, to control the output voltage. In a synchronous buck converter, the input voltage is switched to a lower output voltage through synchronous rectification, and the average of the high-side and low-side switched voltages is controlled by the internal current mode control circuitry. The two transistors behave like an on/off switch, tapping an appropriate amount of the input voltage to the output. The feedback control loop is used to maintain a constant output voltage.

Conclusion

The PT4101C DC-DC converter module is an integrated FET, non-isolated synchronous buck converter which offers high efficiency and programmable switching frequency using advanced circuit topology. It guarantees fast transient responses and its wide input voltage and good line/load regulation make it suitable for a wide range of applications. Its built-in synchronous rectifier and internal compensation circuit make it highly reliable with excellent electrical performance.

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