SUS1R51215B

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DC-DC converters are electronic components that convert a voltage from one level to another. A commonly seen device in this field is the SUS1R51215B, a buck-boost DC-DC converter that changes a low voltage to a higher one or vice versa. This article covers the application field and working principle of the SUS1R51215B.

The SUS1R51215B has a wide range of applications. Some of the more common applications include portable electronic devices, solar panels, notebooks, power instruments and so on. Due to its high efficiency and long life, the device is very popular with engineers. It is also suitable for use in buildings, automotive, ships and avionics that require power supply between 12V and 16V.

The SUS1R51215B design involves the use of two MOSFETs and a transformer. The two MOSFETs act as switches and are connected in a full bridge configuration. A control circuit switches the two FETs on and off to control the current between the input and output of the DC-DC converter. The transformer transmission current between input and output with a low voltage drop.

When the SUS1R51215B is used for voltage step up, the output voltage is higher than the input voltage. To make this happen, the control circuit turns on low side MOSFETs after the voltage at the input terminal rises above a certain level, and the total voltage at the output terminal is the sum of the input voltage and the voltage drop of the transformer. Similarly, when used to step down voltage, the control circuit turns off the high side MOSFETs after the voltage at the input terminal rises above a certain level. The voltage at the output terminal is the difference between the input voltage and the voltage drop of the transformer.

The SUS1R51215B also includes features such as power good signal, built-in soft start and over-voltage protection. The power good signal informs the control system when the output voltage reaches its predetermined level. The built-in soft start prevents output current overshoot when power is first applied. The over-voltage protection protects the device from potential breakdown from excessive input voltage.

The SUS1R51215B can be used in a wide variety of applications to step up or step down the voltage of a DC power supply. Its wide range of features and high efficiency make it an ideal choice for engineers and technicians. With careful selection of components and careful design, the SUS1R51215B can provide reliable operation with excellent performance.

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