BQ24091EVM

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Evaluation and Demonstration Boards and Kits are highly versatile tools that allow designers to quickly develop and validate designs utilizing commercial integrated circuits (ICs). The BQ24091EVM is a highly versatile tool and evaluation board developed by Texas Instruments for their BQ24091 line of devices, which are a series of buck-boost converters designed for USB fast charging applications. This evaluation board showcases the high performance, flexibility, and industry standard features of Texas Instruments’ BQ24091 device.

The BQ24091EVM is an evaluation kit that provides flexible design options and a wide range of components to aid users in design validation when using the BQ24091 line of devices. This evaluation board is built around the input and output parameters of the BQ24091 devices, which interface with USB type devices and wall-wart sources ranging from 9V to 36V. The BQ24091EVM is capable of supplying up to 4 Amps of current at any input voltage for fast charging of tablets, phones, wearables, and other electronic devices with USB ports.

The BQ24091EVM evaluation board can be used to evaluate the performance of the BQ24091 device and to quickly prototype customized designs. The board includes headers to allow for the use of external components to modify the board’s functionality. A switchable bypass mode is included to enable designers to bypass the control IC and check the performance of the buck-boost converter without the IC. The board also uses an 8-pin connector interface to communicate with other boards, enabling users to use the board as part of larger system designs.

The BQ24091EVM works on the principle of a buck-boost converter. The device is based on a multi-mode boost-buck architecture and is designed to take a wide range of input voltage and output current levels. The device uses a low-side N-Channel FET and a high-side P-channel FET as power switches. The FETs are driven by the PWM control logic to implement the buck mode, boost mode, and bypass mode. The buck-boost converter is configured to switch between the buck and boost mode depending on the difference between the input voltage and the output voltage. If the output voltage is higher than the input voltage, the converter switches to the buck mode, and if the output voltage is lower than the input voltage, the converter switches to the boost mode.

In addition, the kit includes protection and regulation circuits to protect the device from over-voltage, over-current, short circuit, and over temperature conditions. The board also includes a low dropout (LDO) regulator circuit for setting the input voltage. Moreover, two resistors are provided for setting the output voltage and the current limit. A user selectable mode select switch is included for changing the board between bypass mode and PWM mode.

The BQ24091EVM evaluation board provides designers with a powerful tool for developing USB charging applications with the BQ24091 line of buck-boost converters. The evaluation board can be used to quickly evaluate the performance of the device and to customize designs utilizing a variety of external components. The board features a versatile set of features and protection circuits, making it an ideal choice for quickly validating and prototyping USB chargers.

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