DC803A

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The DC803A Evaluation Board from United Monolithic Semiconductors is an integrated, versatile, and compact electronic control module for off-line AC/DC power supplies as well as DC/DC converters. This evaluation board enables quick evaluation of flyback, forward, and push-pull topologies in secondary side isolated or non-isolated versions.

The DC803A can be used as a single or dual output power supply, with dual-outputs available in either a 12V/2A or024V/1A configuration. The evaluation board also supports multiple control and monitoring features, such as output voltage/current protection, thermal supervision, and input overvoltage protection.

The DC803A Evaluation board incorporates a series of features such as an adjustable operating frequency of up to 50 kHz, low power consumption on standby mode, and efficient power conversion ratio up to >90%. The efficient power conversion of the DC803A board also leads to lower output ripple and faster system response. Additionally, the DC803A board can also be used for line-immunized applications, as it can be connected to an external pulse transformer for a complete galvanic isolation.

The DC803A board is designed for applications with input voltage up to 265Vac and output voltage up to 20Vdc, making it suitable for a wide variety of applications such as high-frequency lighting and white goods, telecommunications, industrial automation, and more. The DC803A Evaluation Board also features an on-board LED and LCD for control and monitoring.

The working principle behind the DC803A Evaluation Board lies in its ability to act as a power converter that can convert incoming AC power to DC power for use in applications. The DC803A board features a high frequency square wave inverter with a variable pulse frequency control, allowing it to control both the current and the voltage of the output power. The inverter consists of a bridge or a synchronous rectifier to convert AC to DC, and a pair of power MOSFETs to form a voltage-controlled DC/DC converter. The output voltage and current can be adjusted through the pulse-width modulation of the power MOSFETs, set by the control loop of the DC803A board.

The DC803A Evaluation Board is a powerful and highly efficient tool for quickly and easily evaluating the performance of a DC/DC or AC/DC converter in a number of applications. With its ability to provide adjustable frequency and power, along with its comprehensive monitoring and control features, it is able to provide accurate and reliable performance for any number of power supplies.

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