DC1989B-A

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Evaluation Boards – DC/DC & AC/DC (Off-Line) SMPS

DC1989B-A is an evaluation board for both DC/DC and AC/DC off-line switching power supplies. It allows the users to evaluate different operating conditions with its wide adjustable regulation range and comprehensive protection features. This board is suitable for evaluating a variety of circuits, including buck, boost and flyback converters, as well as all kinds of AC/DC converters.

The DC1989B-A board provides a variety of features to make designing a switching power supply easier. The board supports a wide input voltage range of 4.5V to 35V, along with an adjustable peak current mode regulation range of 4.5V to 35V. It also features a comprehensive protection suite, including over-temperature, over-voltage, under-voltage, short-circuit, current-limit and open-loop detection. Additionally, the board includes an adjustable soft-start circuit, enabling faster or slower start-up times. Lastly, the board comes with an on-board oscilloscope to monitor the DC/DC and AC/DC converters’ output.

The DC1989B-A board’s features enable the evaluation of a range of different power supply designs. It is suitable for evaluating buck, boost and flyback topologies, as well as most AC/DC converter topologies. Additionally, the wide input voltage range and adjustable peak current mode regulation range make it easy to evaluate different operating conditions. This makes the board suitable for a variety of low-power applications.

In terms of its working principle, the DC1989B-A board has several key components. At the heart of the board is a DJA99111 IC which provides the output power. The board also includes an operational amplifier for adjustable current sensing, as well as a PIC12C5xx microcontroller. These components are all connected to the board’s oscilloscope, which can be used to monitor the output of the power supply.

In conclusion, the DC1989B-A evaluation board from TI provides a great platform for evaluating DC/DC and AC/DC off-line switching power supplies. With its wide input voltage range, adjustable peak current mode regulation range, comprehensive protection suite and adjustable soft-start feature, this board is suitable for low-power applications. Additionally, the on-board oscilloscope makes it easy to monitor the output of the power supply. Therefore, the DC1989B-A is an excellent option for evaluating different types of switching power supplies.

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