ISL6405EVAL2

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The ISL6405EVAL2 is an evaluation board for evaluating the performance of the ISL6405 SMPS controller. It is a DC to DC controller that provides both sun-average current mode and peak current mode control of the output voltage and enables constant on-time operation, reducing the design time of a constant on-time SMPS. The ISL6405EVAL2 evaluation board allows designers to quickly evaluate the features of the ISL6405 and build a robust DC/DC or AC/DC off-line SMPS.

Overview of ISL6405EVAL2

The ISL6405EVAL2 evaluation board provides a development platform to evaluate the features of the ISL6405 SMPS controller. The board features a variable input voltage selection, overvoltage protection, and an external output voltage sense resistor so that the user can easily configure the output voltage. The board also includes the features necessary for successful operations of a SMPS including a soft-start circuit, current sensing circuit, an on-resistance internal discharge circuit, and a circuit for monitoring the internal temperature of the controller.

The ISL6405EVAL2 board is simple and easy to use. It includes pushbuttons to enable/disable the power output, adjust the switching frequency, and switch between the sun-average and peak current mode. The board also has LEDs that indicate the status of the board and the operations of the controller. The ISL6405EVAL2 also supports optional USB connectivity.

Application Fields

The ISL6405EVAL2 evaluation board can be used in a number of applications which require a switched-mode DC/DC or AC/DC power supplies, such as ATX power supplies, ac adapters, laptops, LCD displays, automotive systems, and industrial machinery. By utilizing the variable input voltage, the user can customize the power supply for specific input voltage ranges and reduce the design time of a SMPS.

Working Principle

The ISL6405EVAL2 is based on the ISL6405 dual synchronous buck controller, which enables constant on-time operations for both the sun-average and peak current mode of operation. The controller integrates an external N-Channel and P-Channel MOSFET which reduces the cost and complexity of the design. The controller regulates the output voltage by operating the MOSFET switch at a constant ‘on-time’ in every switching cycle, based on the input voltage. The output voltage is monitored and adjusted via the external voltage sense resistor.

In the sun-average current mode of operation, the controller regulates the output voltage by adjusting the duty cycle to maintain a constant average current. The ISL6405EVAL2 board includes a programmable current limit setting that allows adjustment of the maximum peak current.

In the peak current mode of operation, the controller regulates the output voltage by adjusting the switch duty cycle based on the peak inductor current. The peak inductor current is sensed via the current sensor and the output voltage is adjusted to maintain a constant peak inductor current. The ISL6405EVAL2 includes a programmable peak current limit setting that allows the user to adjust the maximum peak current for the peak current mode.

The ISL6405EVAL2 also features a soft-start circuit to limit the inrush current, overvoltage protection to protect the powered system during extreme voltage conditions, and an internal temperature monitor for protection of the SMPS against overtemperature. The monitoring of the internal temperature is enabled by the internal temperature sense resistor.

Conclusion

The ISL6405EVAL2 evaluation board represents a development platform for designers to evaluate the features of the ISL6405 SMPS controller and build a robust DC/DC or AC/DC off-line SMPS. The board includes necessary circuits that enable quick and easy evaluation of the controller, and support for optional USB connectivity. The ISL6405EVAL2 evaluation board is suitable for a variety of application fields including ATX power supplies, ac adapters, laptops, LCD displays, automotive systems, and industrial machinery.

The specific data is subject to PDF, and the above content is for reference