BQ24314EVM-251

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Evaluation and Demonstration Boards and Kits are electronic components that enable users to assess specific features of a product and test out multiple protocols within a variety of application scenarios. The BQ24314EVM-251 is a sophisticated example of such a product - enabling the user to accurately simulate and analyse its operational characteristics.

The BQ24314EVM-251 is a high-performance battery charger evaluation module for lithium-ion batteries. The board features the ultra-low-voltage buck converter (BQ24314), which is suitable for charging single-cell lithium-ion batteries. It also has two extra pins allowing for 2-cell dual battery charging. The EVM is rated for a battery voltage of 6V to 25V, and has an output current range of 0.2A to 3A.

The kit is designed to work with the BQ24314 buck converter. The BQ24314 is a high-efficiency switching regulator that combines a low quiescent current of 300nA with a very low envelope ripple current. The device also includes a dedicated output voltage control pin, which allows users to program the output accurately to support multiple chemistries and a wide variety of battery capacities.

The board allows users to measure their battery’s parameters including charge current, voltage, current status, and temperature. The BQ24314 has an integrated high-accuracy current-sense amplifier for high charging accuracy. The adjustable charge current limit with ±1% accuracy allows users to optimize their battery charging outcomes by selecting suitable current and voltage levels.

The BQ24314EVM-251 evaluation module also features two ultra-low noise bidirectional communications channels. It has a dual-channel communications link that uses a high-speed serial peripheral interface (SPI) for data logging and host device communication. The module also supports battery profile customization using a dedicated host application and allows multiple battery profiles to be saved.

The board has built-in protection features to ensure that the BQ24314EVM-251 can be safely used in various applications. It uses an overvoltage protection circuit to protect the battery from overcharging, and an integrated undervoltage lockout to protect the device from accidental outputs below the minimum threshold. The module also includes a thermal protection circuit that disables the converter when the temperature of the PCB exceeds the upper limit.

In conclusion, the BQ24314EVM-251 is an ideal evaluation and demonstration tool for lithium-ion charging solutions. It has a wide input voltage range, adjustable current limit, two communications channels, and integrated protection features. The board enables users to accurately simulate and analyse the operational characteristics of the BQ24314 buck converter, making it a versatile and reliable option for any charge controller application.

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