STEVAL-ISA140V1

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DC/DC & AC/DC (Off-Line) SMPS is used for converting electrical power from one form to another, and STEVAL-ISA140V1 is one of the evaluation boards for this purpose. It features multiple power domains, degree of integration, and module-based scalability that make it suitable for a variety of applications.

The STEVAL-ISA140V1 evaluation board includes a buck-mode synchronous flyback DC/DC converter and is designed to explore the performance of the ISL8872A synchronous buck regulator. It is operated in a buck-mode with a wide input voltage of 3.3 to 14 V and 12 V output. This application note describes the board configuration and operation.

The STEVAL-ISA140V1 evaluation board has been specifically designed for use in automotive and motor control applications. It supports a wide input voltage of 3.3 to 14 V and delivers up to 12 V output voltage. The board is designed to offer maximum load current of 1.2 A and is capable of achieving efficiencies of up to 95%.

The board uses four on-board power stages: a buck regulator, a buck converter, a half-bridge, and a flyback regulator, with associated inductors, capacitors, and driver components for each stage. The buck regulator integrates a phase-shifted full-bridge topology with dual-phase control and can be configured to generate 12 V from an input voltage ranging from 3.3 to 14 V. The converter is designed to provide power up to 1.2 A and includes an on-board soft start circuit to minimize startup current surge and enhance overall performance.

The half-bridge is designed to provide up to 8 A of output current and handle high frequency, short duration transients. The flyback regulator is designed to provide up to 11 W of output power and is suitable for automotive and motor control applications.

In addition to the on-board power stages, the board also has two buck controllers, one half-bridge controller, and one flyback controller. The controllers are connected to an on-board microcontroller that provides programmable operational parameters and manages multiple power signals. The board also has over-voltage, overload, and over temperature protection circuitry, and a prototyping area for additional circuitry.

The STEVAL-ISA140V1 evaluation board is a versatile platform for automotive and motor control applications. It is ideally suited for prototyping, evaluation, testing, and development of DC/DC and AC/DC (off-line) SMPS applications. Its flexible design and feature set make it an ideal solution for automotive and motor control applications.

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