TPS22958EVM

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Evaluation and Demonstration Boards and Kits often contain a range of components which are intended to be used for development purposes, allowing designers to fully explore the performance capabilities of a certain application before making a final decision on which device to use. The TPS22958EVM is one such board and kit which provides the designer with the ability to thoroughly evaluate and analyse the features of TPS22958 switch-mode regulators.

The TPS22958EVM contains a range of components which are all intended to allow the user to explore the characteristics of the TPS22958 switch-mode regulators. It includes two TPS22958 SOT-23 regulated devices, two-output stabilizing transformer, two high current shunt resistors and two temperature sensors. It also incorporates a DIPAdaptor with the necessary matching components, enabling on-board test chip connections. This board and kit also provide an adjustable input voltage range, along with several output load selection options and a selection of output current ranges.

The TPS22958EVM also includes a LED that provides visual feedback of the status of the switching frequency, the output mean voltage, and the power-supply load. The board and kit feature adjustable switching frequency, adjustable output voltage, and adjustable peak and valley current for both positive and negative output loads. The adjustable switching frequency can be adjusted to minimize the output noise for different application conditions. The adjustable output voltage can be used to set a minimum and maximum voltage level with respect to environmental conditions.

In terms of performance attributes, the TPS22958EVM can provide up to a maximum efficiency of 96%. Additionally, it offers a low-ripple, fast transient-response output voltage, with a ripple amplitude of 0.5% when at steady state. Moreover, an output voltage regulation accuracy of +2.5%, with temperature and line variations over a full-load range of 0-10% is achievable. The TPS22958EVM also meets the international safety requirements for FCC Class B.

The primary application fields for the TPS22958EVM are switch-mode regulators, consumer electronics, motor control, and automotive. The application fields benefit from the features of the board and kit, which include excellent transient-response times, low output ripple, wide input range and adjustable output voltage. Moreover, the onboard LED provides quick visual feedback on the application\'s status, from a range of factors such as switching frequency, mean voltage and current.

In terms of working principle, the TPS22958EVM provides a variable-frequency, pulse-width-modulated (PWM) control of the output voltage. The voltage is regulated by controlling the average duty cycle of the PWM signal, with the duty cycle being determined by the ratio of the feedback voltage from the output to the reference voltage. The actual switching frequency can be adjusted externally and is also dependent on the load conditions. The PWM control is also adjusted by the current feedback, with the current feedback being used to limit the switch current if it exceeds an internally programmed upper threshold.

The TPS22958EVM is a board and kit designed to allow for full exploration and evaluation of the features of TPS22958 switch-mode regulators. It contains a range of components to provide adjustable frequency and voltage, excellent performance attributes and a wide range of application fields. In terms of working principle, it provides a variable-frequency, pulse-width-modulated (PWM) control of the output voltage, along with current feedback used to limit the switch current if necessary.

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