TPS61282AYFFT

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TPS61282AYFFT Application Field and Working Principle

The TPS61282AYFFT is a synchronous Buck converter that belongs to the family of DC DC Switching Regulators specified by the Texas Instruments’ Power Management Integrated Circuits (PMIC). This switching regulator has been designed to step down an input voltage (Vin) of up to 5.5 V to generate a lower output voltage (Vout). This device includes various functions such as short circuit protection and over-voltage protection. While the TPS61282AYFFT can be used both for small and large load currents, it excels at sourcing load currents of up to 2.5 amps.

Application Field of TPS61282AYFFT

The main application field targeted by the TPS61282AYFFT is related to the mobile device power supply. This device guarantees a typical operational efficiency of up to 96%. This high budget efficiency is complemented by the small package that makes this device suitable to be used in smaller electronic units such as USB PD applications required in many mobile devices. Additionally, the external compensation that can be used with this device allows faster dynamic response without making use of an external circuit.

Working Principle of TPS61282AYFFT

The primary feature of a switching regulator such as the TPS61282AYFFT is its ability to regulate the output voltage despite variation to the input voltage. This is achieved by making use of two switching components. The first component operates by connecting the input voltage and the output voltage for a specific period of time. This is followed by the second component that disconnects these two voltages. By relying on the following formula, we can discover how the output voltage is regulated,

Vout = Vin * Duty Cycle

Where the Duty Cycle is defined as the fraction of the period of time where the input voltage and the output voltage are connected. This can also be referred to as switching time. As you may have noticed, the Voltage Output is determined by the Duty Cycle. Therefore, even when the input voltage varies, the output voltage will remain constant by appropriately modulating the Duty Cycle.

The TPS61282AYFFT makes use of a synchronous rectified Buck converter. This particular technology makes use of a high-side switch in addition to the switching component mentioned above. This high-side switch is used to switch the output capacitor between the output voltage and the ground. This switching allows the TPS61282AYFFT to reduce the switching losses that would otherwise occur due to a continuous connection of the output capacitor to the output voltage.

Conclusion

The TPS61282AYFFT is a synchronous Buck converter that was developed by Texas Instruments as a DC DC Switching Regulator. This device is mainly intended to be used in applications related to mobile device power supplies, such as USB PD Applications. The primary feature of this type of regulators relies upon the ability of properly modulating the Duty Cycle to maintain a constant output voltage despite variations to the input voltage. This switching regulator also makes use of a high-side switch to reduce the switching losses that would otherwise occur due to a continuous connection of the output capacitor to the output voltage.

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