BQ24031EVM

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Evaluation and Demonstration Boards and Kits: BQ24031EVM

The BQ24031EVM is an evaluation and demonstration board and kit from Texas Instruments. This versatile kit provides a platform for evaluating the operation and performance of the dual-cell BQ24031 flyback switching regulator. It is a complete evaluation system, designed to demonstrate how to use a dual-cell regulator to achieve cost-effective and efficient six-step conversion. It also enables the user to evaluate features such as adjustable voltage, adjustable current limit, and programmable Pulse Width Modulation (PWM).

Application

The BQ24031EVM is suitable for a wide range of applications, including multiple DC-DC converter designs for use in automotive, telecom, server and consumer applications. This makes it an ideal platform for evaluating power solutions for portable, Smartphone and tablet designs. Additionally, it is well-suited to applications that need high efficiency, wide input range and small output ripple voltage.

Features

The main features of the BQ24031EVM include a wide 4.5V to 30V input voltage range and accurate output voltage regulation up to 6V. The EVM is also able to provide a load disconnect at low line input voltages and adjustable current and voltage limits. Additionally, the EVM is able to automatically detect a connected device’s current limit at the start of operation.

The BQ24031EVM also includes an I2C port for monitoring, control and configuration of the device. This allows the user to monitor variables such as power-up current limit, output voltage, and DC/DC converter switching frequency. The EVM also has test points for current measurement, as well as LED indicators for monitoring the status of the system.

Working Principle

The BQ24031EVM is based on a dual-cell topology, using two cells and combining them in an interleaved and staggered manner. This topology, combined with advanced control algorithms, achieves high-efficiency and low output ripple voltage without the need for an external transformer. This allows the system to achieve up to 97% efficiency in input starvation cases.

The BQ24031EVM employs a programmable PWM frequency. This is adjustable between 100kHz and 400kHz depending on the application, and can be controlled via the I2C port. This feature provides additional flexibility when designing the primary-side of the system.

The output voltage of the BQ24031EVM can be adjusted using the on-board potentiometer. This allows the system designer to optimize the performance for a wide range of applications and enable a variety of compensation methods.

Conclusion

The BQ24031EVM from Texas Instruments is a versatile evaluation and demonstration board and kit. It is suited for a wide range of DC-DC conversion applications, providing the user with adjustable settings to customize the performance. The dual-cell topology and programmable PWM frequency also allows the user to maximize system efficiency and minimize output ripple voltage.

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