TPS61122EVM-205

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The TPS61122EVM-205 evaluation module is one of the many different evaluation boards offered by Texas Instruments. It is categorized under Evaluation Boards - DC/DC & AC/DC (Off-Line) SMPS, suggesting its main applications are in the power management field.

The TPS61122EVM-205 is a DC/DC step-down converter that operates with an input voltage range of 4.5V to 32V and provides a constant output voltage of 3.3V. It has a switching frequency of 500kHz and an adjustable current limit that can be configured from 0A to 1.0A.

The TPS61122EVM-205 comes in two variants - one optimized for power applications and the other for temperature applications. The power optimized version is based on the classic quasi-linear regulator topology whereas the temperature optimized version is based on the classical CCM (constant-on-time) regulator topology.

The two variants of the TPS61122EVM-205 differ slightly in their operating principles. The power optimized variant of the device operates using a quasi-linear regulator topology which uses the principle of controlling the output voltage through feedback. The voltage is monitored through a voltage divider network and this information is fed to the on-board IC which compares it with the reference voltage. If the voltage levels are different, the duty cycle of the PWM (pulse width modulation) signal is adjusted accordingly. This PWM signal drives the current inside the device which in turn is used to convert the input voltage into the desired output voltage.

On the other hand, the temperature optimized variant of the TPS61122EVM-205 uses a constant-on-time (CCM) regulator topology. The device, in this case, works on the principle of proportional-integral (PI) control. This variant of the TPS61122EVM-205 is capable of dynamic response, which means that the output voltage can be adjusted quickly and accurately. This is due to the fact that the CCM approach doesn’t require a separate voltage reference, since the device uses a loop to compare the output voltage with its set-point.

The TPS61122EVM-205 evaluation module is an ideal solution for engineers designing systems that require a constant output voltage with maximum efficiency. Its power and temperature optimized versions allow designers to pick the right variant for their system design, ensuring high performance and reliable operation. The device also uses advanced circuit techniques and various safety features, making it a suitable choice for commercial applications.

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