TPS61281YFFR

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TPS61281YFFR is a synchronous step-down DC-DC regulator with an input voltage range between 3.5V and 29V. It features a high output current and a high conversion efficiency. It has a wide range of Application fields and can be used in many areas such as portable electronics, battery powered applications, digital cameras, automotive systems, portable medical and consumer electronics products. In this article, we are going to take a look at the application fields of TPS61281YFFR and its working principle.

Application Fields

TPS61281YFFR is widely used in various Industries like automotive, home, industrial and medical. It is widely used in the automotive industry due to its wide range of input voltage, high output current and high conversion efficiency. It is generally used in automotive power systems like 12V battery charger, engine management, fuel pump, and anti-lock braking systems. It finds use in home appliances like vacuums, washing machines, dishwashers and other home appliances, due to its high efficiency.

TPS61281YFFR is used in various industrial applications ranging from motor drives to human machine interface. It is also used in medical equipment and for powering portable medical devices. It is suitable for battery-powered applications and is widely used in digital cameras, music players, and even toys.

Working Principle

TPS61281YFFR operates by switching between two output voltage levels. The input voltage is converted to a DC voltage. The voltage is then converted to the desired output voltage by means of pulse width modulation and a power stage that drives an inductor to generate the output voltage. The inductor is used to store energy during each cycle, which is then released during each cycle. The output voltage is then regulated by controlling the duty cycle.

The regulator features adjustable output voltage and current limit features. The output current can be limited by connecting a current sense resistor between the OUT and IN pins. When the current sense voltage signals the current limit point, the output is turned off until the next cycle and the cycle restarts again. The output voltage is adjustable using the feedback voltage and a voltage divider. The voltage is monitored and the feedback voltage is adjusted in order to maintain the desired output voltage.

TPS61281YFFR features an under-voltage lockout (UVLO) feature. The UVLO feature prevents the regulator from turning on when the input voltage is lower than the set threshold. This helps protect the device from unexpected voltage dips and potential damage. An internal voltage reference and a soft-start feature are also provided.

Conclusion

We’ve seen how TPS61281YFFR is used in various application fields. It is used in automotive, home, industrial and medical applications, as well as in battery powered applications. We’ve also seen its working principle and how it operates. It utilizes pulse width modulation and a power stage to generate the output voltage. It also features adjustable output voltage and current limit features, under-voltage lockout and a soft-start feature.

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