ISL854102DEMO1Z

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ISL854102DEMO1Z application field and working principle Evaluation Boards - DC/DC & AC/DC (Off-Line) SMPS

The ISL854102DEMO1Z, part of Intersil’s family of versatile AC/DC and DC/DC evaluation boards, helps to speed the development of offline single-stage power supplies. These boards are ideally suited for multi-output power solutions requiring high efficiency, low component count, and easy implementation. The application involves high efficiency, high power density and low cost designs using a single-stage flyback topology.

The ISL854102DEMO1Z evaluation board features the ISL854102 PWM controller IC that is used to drive a single-stage flyback converter. The board features an asynchronous Rectified Resonant Half-bridge (RHRHB) topology for the power section of the design. This topology is especially interesting because it gives designers the combined benefits of a rectifying bridge and a resonant work-point. It is well suited for applications that require multiple outputs and low cost, while maintaining high switching frequencies.

The application and operation of the ISL854102DEMO1Z is quite different from conventional SMPS topologies. In a traditional flyback converter, current flows from the primary side windings to the secondary side windings which is then rectified and sent to the load. However, in the flyback configuration used by this board, current flows from the secondary side to the primary side windings and then is sent to the load. This has the added benefit of reducing the magnetic component cost since it only requires one transformer, and no additional inductor is needed.

The ISL854102DEMO1Z evaluation board utilizes a Rise Time Modulated (RTM) technique that eliminates the secondary-side controller which is used in many other single-stage converter designs. This technique uses a modified constant frequency modulation which makes the flyback converter significantly more efficient. The evaluation board has a switching frequency range of 20kHz to 250kHz.

The ISL854102DEMO1Z evaluation board is equipped with a comprehensive list of features to help in the development process. It includes on-board power supply, LED displays which indicate input voltage level, output current level, output voltage level, power good and the state of the power supply. Additionally, the evaluation board can accept input power between 85Vac to 265Vac, and has an adjustable +5V DC output.

The ISL854102DEMO1Z AC/DC and DC/DC evaluation board is designed for use in offline power supply applications such as consumer and industrial electronics, white goods, peripherals, lighting, and automotive applications. It is well suited for applications that require multiple output voltages and a cost-effective, easy-to-implement design.

In summary, the ISL854102DEMO1Z evaluation board is created with designers in mind by aiding them in their development of low cost, single-stage power supplies. It features an asynchronous Rectified Resonant Half-Bridge topology, eliminating the need for any additional components. This board also features an RTM technique, which helps in increasing the efficiency of the power supply. With its comprehensive features, it is sure to be an invaluable asset for any designer looking to develop a cost-effective, high efficiency power solution.

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