BQ24123EVM-002

The BQ24123EVM-002 evaluation module is an easy and fast tool for testing and demonstrating the BQ24123 synchronous 1.0 MHz buck-boost converter from Texas Instruments. The board supports Li-ion and Li-polymer batteries and allows for current and voltage output monitoring. This evaluation module can be used for fast prototyping and design validation when used in certain applications.

Application Field

The BQ24123EVM is a versatile board that can be used in a variety of applications. It is widespread throughout the consumer electronics industry, such as for providing back-up and mobile power for cellular phones, PDAs, digital cameras, and portable audio/video players. The BQ24123EVM is also used to power medical monitoring equipment or provide power to portable computing devices. Furthermore, BQ24123EVM boards can be used for test, validation, and design of mobile power solutions, as various paramters associated with the board can be monitored and adjusted.

Working Principle

The BQ24123EVM-002 is based on the BQ24123 synchronous buck-boost converter. It provides an adjustable output voltage from 0.6 V to 5.5 V, adjustable via an external resistor. It also has dedicated current and voltage monitoring pins. The board uses 1.0 MHz fixed switching frequency making it ideal for low-power applications.

The board is equipped with current sense amplifiers to monitor the current flow. The current sense amplifiers help to detect if any fault conditions exist on the board and can shut down the board when the input current reaches its maximum limit. The board also contains several thermal protection circuits to protect the board in case of an over-temperature condition.

The board includes the parallel operation facility allowing designers to increase the output current of the board with two buck-boost converters running in parallel. This feature reduces the current and voltage drop across the two converters, resulting in improved system efficiency.

The board also has a power save function which enables the board to operate in a light load condition and an input UVLO (under-voltage lockout) protection. This function protects the output device from in-rush current by disconnecting the output device when the input voltage drops below 4V. In addition, the board can be shutdown by setting the enable pin low.

In conclusion, the BQ24123EVM-002 evaluation module is a versatile board that can be used in a variety of applications. It is easy and fast to use and supports Li-ion and Li-polymer batteries with current and voltage monitoring. The board has many features such as parallel operation, power save, and an input UVLO protection, making it an ideal choice for testing and demonstration of the BQ24123 synchronous buck-boost converter.