DC927A

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DC927A Application Field and Working Principle

DC927A is a high-performance, low-power DC/DC & AC/DC switching regulator evaluation board. It adopts professional isolated voltage conversion technology, combined with the high current DC/DC and AC/DC switching regulator patterns, to provide users with a stable and reliable power source. This board is suitable for users to evaluate and prototype electronic designs such as power supply and battery management solutions.

Features of the DC927A

The DC927A features a full range of power supply configurations with DIP switch control, external reference and temperature compensation, AC/DC and DC/DC circuitry, tolerant to high temperature shock, highly efficient insulated switching Regulator, adjustable transformer core, and a low-noise linear regulator.

The DC927A is equipped with a high resolution, low power digital voltmeter that allows users to accurately monitor the output current and voltage of the board from 0.1V to 300V. The board also features an adjustable secondary side voltage controller that allows users to adjust the board\'s voltage range with as little as 1mA ripple current. The AC/DC converter can be programmed to vary in a range from 0.1V- 300V, and is compatible with the most popular DC/DC and AC/DC switching regulators, including the LTC4300, STF500, LTC4351, and SFS600 series.

The DC927A board features a current monitor that displays current settings in a range of 1A to 600A. It also includes an adjustable soft-start for switching regulators, and an adjustable output current limit for both AC and DC inputs. A unique feature of the DC927A is a built-in temperature sensor that allows users to monitor the actual temperature of the board up to a range of 125°C.

Working Principle of DC927A Board

The DC927A evaluation board works based on a closed-loop switching regulator design. As the name suggests, the power supply design utilizes a feedback system to ensure that the output voltage stays within an acceptable range. This feedback loop consists of the following components:

• The power source – This is the main power source, typically either an AC or DC voltage.
• The feedback circuit – The feedback circuit takes in a signal from the output voltage and compares it to a reference signal from the user.
• The error amplifier – The error amplifier then takes the difference of the two signals, generating a control signal that is used to control the power switch, the transformer and the output filter.
• The power switch – The power switch is typically made up of an insulated-gate bipolar transistor (IGBT) or an insulated-gate FET (IGFET) device. It is used to regulate the current going from the primary side of the transformer to the secondary side and back. The power switch is controlled by the control signal generated by the error amplifier.
• The transformer – The transformer steps up or steps down the voltage provided by the input source.
• The output filter – The output filter serves to filter out high-frequency noise from the output signal, allowing the desired voltage to be generated.

By combining all these components, the DC927A board is able to produce a steady stream of power for a fixed load. This steady stream of power ensures that the specified output voltage and current values are met. The digital voltmeter then displays the current readings for a maximum resolution of 1mV.

Conclusion

The DC927A evaluation board has been designed to provide an easy-to-use platform for the evaluation and prototyping of switching regulators. Through its combination of isolated voltage conversion technology, digital voltmeter, adjustable secondary side voltage controller, and low-noise linear regulator, the DC927A provides a highly precise and reliable power source for users. As such, the DC927A is a great choice for those looking to evaluate and prototype a variety of power supply and battery management solutions.

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