ISL8115EVAL2Z

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The ISL8115EVAL2Z is a multifunctional evaluation board designed to test the performance of the ISL8115 dual channel synchronous buck controller and ISL8117 dual channel pulse-width-modulation (PWM) controller. These two devices work alongside one another to provide efficient power-supply solutions for off-line converters, such as DC/DC and AC/DC switch-mode power supplies (SMPS).

The purpose of the ISL8115EVAL2Z evaluation board is to allow an easy evaluation of the ICs featured, as well as providing users with an example of how the ICs can work in their own design. The device also assists in performing necessary measurements for loop responsivity testing, open load conditions, error analysis, and start-up/shutdown behaviour.

The ISL8115 buck controller is a single-phase, dual-channel device that allows a power supply designer to reduce the number of components without compromising system performance. It is designed to support both the secondary side synchronous rectification and synchronous switch converters. The ISL8117 PWM controller is a single-phase, dual-channel device, making it well suited for multi-phase applications. It is a highly flexible controller that enables the user to program the operating frequency, output voltage, switching frequency, and current limit.

The ISL8115EVAL2Z evaluation board provides the necessary measurements to determine the performance of the ICs. These measurements include input voltage, output voltage, output current, switching frequency, and efficiency. The board includes various features designed to improve system performance, such as a thermistor, which monitors the temperature of the board and adjusts the operation of the controller if necessary; a soft-start circuit, which minimizes the inrush currents when the system is first turned on; and a fixed frequency burst operation feature, which allows the system to operate at a lower frequency to save power when the load current is low.

The evaluation board includes two independent power-supply circuits. The first is a step-down (buck) circuit designed to convert a higher voltage DC input to a lower voltage DC output, while the second is a flyback circuit, which can transform an AC input into a regulated DC output. The common output section of the board allows measurement of both the buck and flyback currents. The evaluation board also supports a -12V auxiliary power rail.

In order to start the evaluation board, the user needs to configure the input voltage and output voltage. The set point voltage can then be adjusted using the two-channel potentiometers at the bottom of the board. The ICs can also be programmed using the SMBus protocol using the connection pins located at the end of the board near the power supply connections.

The ISL8115EVAL2Z evaluation board is suitable for a variety of applications, such as industrial and consumer power supplies, telecommunications systems, and other power converters operating from an off-line input. The evaluation board can be used for a variety of tests and measurements that help users evaluate the features and performance of the ICs as well as simulate real-world situations in order to refine their designs.

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