BQ24721EVM

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The BQ24721EVM evaluation module (EVM) is a high-performance, wide-input voltage range, high-efficiency, low-power load switch with an adjustable current limit and PowerPath control functions. It is designed for evaluating the circuit and performance of BQ24721 load switch integrated circuits. This evaluation module provides a convenient platform to assess the BQ24721 load switch for automotive, industrial, and consumer applications.

The BQ24721EVM application fields include automotive, industrial, and consumer electronics. In automotive areas, the BQ24721EVM is used for low-priority loads switching such as radio idle-state and navigation system switch-on. It is also used for fuel pumps, door lock systems, and rearview camera on/off switching in automotive infotainment systems. Additionally, this application module is used for low-priority loads switching in industrial areas such as pumps, monitors, and motors. In consumer electronics, the BQ24721EVM is used for a variety of consumer equipment such as game consoles, digital cameras, and computers.

The BQ24721EVM offers a wide input voltage range from 4V to 24V. It also provides a programmable current limit, a maximum load current of 8A, and operation at up to 25V. The BQ24721EVM also includes a PowerPath controller for optimizing the supply current to the load path by using both input and output power sources. It features an undervoltage lockout, adjustable threshold for minimum input voltage, and an overvoltage protection of up to 40V. Other features include a hysteresis accuracy of 0.2%, an adjustable current limit of up to 8A, and a 200kHz switching frequency.

The BQ24721EVM works on the principle of switched-mode power supply to control the incoming supply current to achieve the desired load current. Firstly, the resistor on the EVM board is adjusted to set the current limit. Then, the undervoltage and overvoltage lockout of the BQ24721 are activated. When the input voltage is between the threshold levels of the BQ24721, it turns on the internal MOSFET switch to connect the output supply to the load. The output current is then limited by the resistors on the EVM board. The EVM also allows an adjustable minimum load voltage. This ensures an optimum load voltage at all times.

In summary, the BQ24721EVM is an evaluation module designed for automotive, industrial, and consumer applications. It offers a wide input voltage range, programmable current limit, a hysteresis accuracy of 0.2%, a maximum load current of 8A, and operation up to 25V. It works on the principle of switched-mode power supply to control the incoming supply current for the desired load current. This evaluation module provides an excellent platform for evaluating the performance of the BQ24721 load switch integrated circuits.

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