DC870A-B

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The DC870A-B evaluation board is an ideal solution for DC/DC and AC/DC (off-line) switched mode power supply applications of up to 875W. It features two isolated DCMs, the NCV51605 controller and a high-performance driver, the NCP51703. It provides both system and component engineers with an easy-to-use platform that can be used to evaluate and develop a wide variety of power supply designs.

The DC870A-B board has been designed to provide an efficient, cost-effective and easy-to-use platform for evaluating and developing DC/DC and AC/DC switched mode power supply designs. The board features an onboard voltmeter, thermistor, and a current transformer which provide accurate measurements of the input and output currents and voltages. It also includes an auxiliary power supply to power other components. The board has two feedback loops, one for the master output and one for the slave output, which provide enhanced system control.

The DC870A-B board is pre-configured for easy evaluation and employs the NCV51605 controller IC for accurate closed-loop control of the power supply. Its design is simplified by the use of two isolated DCMs (DC-DC converters with two outputs) and two dedicated power supply controllers. The integrated NCP51703 driver also ensures high efficiency and low electromagnetic interference (EMI). This evaluation board is a great tool to test and develop various applications, ranging from DC/DC conversion to AC/DC voltage regulation.

The working principle of the DC870A-B board is based on the constant-voltage (CV) control loop. The NCP51605 controller works in conjunction with a current-mode feedback loop in order to accurately regulate the output voltage. The feedback loop includes a voltage regulator and a reference generator, as well as sense amplifiers which measure the output voltage. The output voltage is then compared to the reference voltage, and an appropriate output is produced to control the power supply.

The integrated NCP51703 driver ensures high efficiency of the power supply by providing quick on/off switching of the power switches. It also maintains a good EMI performance by providing a low-ripple, low-EMI output current waveform. The driver is also capable of controlling the switching frequency and the synchronous rectifier switch, allowing for increased efficiency.

The DC870A-B board is an ideal solution for evaluating and developing DC/DC and AC/DC switched mode power supply designs. Its onboard components and features make it easy to use and provide a reliable and precise platform for testing and developing assignments. With the integration of the NCP51605 controller and the NCP51703 driver, the DC870A-B evaluation board provides an ideal platform for constructing power supply designs.

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