BD9C401EFJ-EVK-001

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The BD9C401EFJ-EVK-001 is a powerful evaluation board for DC/DC & AC/DC (Off-Line) SMPS applications. It is an ideal tool for exploring the features of the BD9C401EFJ integrated circuit. The IC on this development kit is a highly integrated flyback controller for up to 250Ws of output power. It features integrated 650V power MOSFET, integrated start-up power FETs, wide input voltage range of 4V to 28V, and ±5% fixed PWM frequency of 700kHz. It also features low-power startup circuit with adjustable current limit, Phase Shift PWM, high voltage over temperature protection, and ZVS/ZCS reset.

The evaluation board consists of the BD9C401EFJ-EVK-001 IC, which Intersil supplies with the IC. The board has been designed to reduce the risk of blowing the starter FETs, as it incorporates them in the circuit. It also includes some additional components to provide a safe and robust evaluation environment.

The main operating principle of the evaluation board is that it is connected to the system’s power supply, and then uses the control signals from the microcontroller to initiate the switching cycle in the circuit. This begins with the triggering of the start-up power FETs and subsequent power MOSFETs to turn on the load. The IC then monitors the feedback signals and adjusts the PWM duty cycle accordingly, to maintain the load power. As the power demand changes, the appropriate circuits (e.g., Phase-Shift PWM) are enabled or disabled to ensure optimal control of the circuit.

The application of the BD9C401EFJ-EVK-001 evaluation board can be seen in the development of several electronic products. For example, it can be used to design controllers for single phase power supplies such as adapters, chargers, and so on. It can also be used to develop driver circuits for solenoid and motor drives, or in small unit lighting systems.

In summary, the BD9C401EFJ-EVK-001 is an ideal development tool for DC/DC & AC/DC (Off-Line) SMPS applications. It is a highly integrated IC with integrated power MOSFETs, wide input voltage range, adjustable current limit, and high voltage over temperature protection circuitry. The board can be used to develop controllers for various applications such as adapters, chargers, solenoid and motor drives, and small unit lighting systems.

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