BD9C501EFJ-EVK-001

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The BD9C501EFJ-EVK-001 evaluation board is a highly efficient AC/DC offline switch-mode power supply (SMPS) converter developed by ROHM Semiconductor. This board helps users set up and evaluate the BD9C501EFJ device, a controller for online and offline non-isolated switching power supplies. In this article, we\'ll take a closer look at the BD9C501EFJ-EVK-001 application field and working principle in order to understand the merits of this board.

The BD9C501EFJ-EVK-001 evaluation board is highly suited for a range of power supplies, including adapters, notebook adapters, LED driver power supplies, LED lighting, motor driver circuits, chargers, and general purpose regulated output applications. The board includes an inductor, sense resistor, compensation components, output capacitor, startup resistor, and external current-limit resistor. The board also offers a Quick Start guide to configure and use the device.

The BD9C501EFJ-EVK-001 evaluation board uses a single-stage, non-isolated current-mode PWM buck converter. The board features a high quality factor (Qf) transconductance amplifier that achieves high-efficiency performance at various load conditions. The board is fully integrated with the power supply, eliminating additional components and complexity. The board includes an internal compensation network and an inductor-capacitor-resistor (LCR) filter combination.

The BD9C501EFJ-EVK-001 features an integrated power supply circuit with advanced features such as spread spectrum technology, stabilization for sudden load transients, and over temperature protection. It also provides a programmable clock rate, on/off control, current sensing, current mode control, and PWM dimming control. The board also has a frequency jitter circuit for high noise suppression. It also includes a low power start-up circuit and a soft-start control circuit.

To maximize efficiency over a range of load conditions, the board incorporates a built-in compensation network. The network consists of capacitor, resistor, and inductor components that operate in various feedback loops. It ensures high-quality power delivery and maintains the power supply\'s stability. The board also features selectable parameters such as switching frequency, start-up current limit, and soft-start time.

The BD9C501EFJ-EVK-001 board achieves superior efficiency and helps minimize EMI, thus providing an optimal solution for space-constrained applications. The board\'s integrated protection features include open-loop protection, overvoltage protection, output over current protection, and short-circuit protection. It also offers active power-factor correction with a rated power of up to 120W.

In summary, the BD9C501EFJ-EVK-001 evaluation board is an ideal solution for a wide range of DC/DC and AC/DC offline SMPS applications, providing excellent performance and reliability to the user. It incorporates advanced features such as spread spectrum technology, stabilization, and over temperature protection. The integrated protection system and compensation network ensures the highest quality of power delivery and noise suppression. Moreover, the board enables users to quickly set up and evaluate the BD9C501EFJ device.

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