BQ77908AEVM-001

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The BQ77908AEVM-001 is a type of Evaluation and Demonstration Boards and Kits, and it can be used in a wide range of applications, from powering-up small electronic devices to avionics applications. It is designed to provide a bench top platform to start development and optimize implementations for applications that can utilize a stand alone energy source. This board is ideal for evaluating the performance of a wide variety of controllers and power management systems.

The kit includes a BQ77908AEVM-001 evaluation board, an ISOTOP 4CP-1000 DC-DC converter, a 50x50mm heatsink, flexible brackets and supports, and a 4-pin USB cable. The board also has nine gold-plated SMT mountable headers that provides easy access to the ICs on the board as well as access to the external devices.

The BQ77908AEVM-001 board features the Texas Instruments\' BQ77908 step-down synchronous DC-DC controller. This controller supports power conversion from a voltage range of 4.5V to 15V, while providing precise current limitation, programmable output voltage, and low noise operation. It is also optimized to work in and provide power for embedded systems.

The core working principle of the BQ77908AEVM-001 board is to reduce the input voltage to a given output voltage. The input voltage is connected to one side of the controller, and the load voltage is coupled to the other side. The circuit allows for power to be shut off when the output falls below a certain threshold point. When no output is detected, the circuit resets and re-configures itself. The BQ77908 controller also provides input protection.

The BQ77908AEVM-001 board also has an adjustable current limit feature that can be set for a UL-recognized limit. This current limit is achieved through the use of an external resistor, and can be adjusted according to the requirements of the application. In addition, the board has a thermal sensing feature which allows it to reduce the current limit when the temperature of the board increases so as to avoid component damage due to overheating.

The BQ77908AEVM-001 board also features programmable over-voltage protection (OVP) and over-current protection (OCP). The OVP feature allows the user to set a threshold voltage level, above which the board will reset itself and disable the output. OCP is an additional safety feature, which when enabled, increases the rate of the current limit to prevent damage due to an overload or short circuit.

The BQ77908AEVM-001 board also features an integrated MOSFET driver allowing for high efficiency and better power conversion. It has an integrated low-side MOSFET allowing for a more efficient solution compared to a paralleled solution. The board is capable of low ripple switching at a frequency of up to 2MHz, providing for a wide range of control topologies.

In conclusion, the BQ77908AEVM-001 evaluation board and kit is the perfect choice for evaluating the performance of the BQ77908 controller. It provides a versatile platform to start development and optimize implementations for applications that can utilize a stand-alone energy source. The board also offers several features to provide improved efficiency, safety, and robustness. The adjustable current limit, over-voltage protection, and over-current protection features ensure maximum performance and protection for a wide range of applications.

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