BQ24023EVM

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The BQ24023EVM (evaluation module) is a power management integrated circuit (PMIC) created by Texas Instruments. This device combines several battery power nodes into a single chip for simplified design implementation. By monitoring the voltage and current of two separate Li-ion batteries, the device can provide an optimized charging path to ensure maximum battery life. The scope of the chip’s capabilities includes charge current and voltage monitoring, reverse charge prevention, charge fault detection, and programmable over-voltage and over-temperature protection.

The BQ24023EVM is part of Texas Instruments’ Evaluation and Demonstration Boards and Kits. The Evaluation and Demonstration Boards and Kits are created to simplify the evaluation process for potential customers. Through the use of an evaluation module, Texas Instruments is able to demonstrate the functionality of the device, provide sample code for the system and generate sample data to showcase the results.

The BQ24023EVM uses an I2C (Inter-Integrated Circuit) interface to communicate with external devices such as microcontrollers or power controllers. The device contains an EPROM (erasable programmable read-only memory) that can be programmed to select the desired operating parameters. A single wire serial data bus is used to control the device\'s internal operations. The onboard power stage includes a resistor divider to control the output voltage.

The BQ24023EVM is designed to work with lithium-ion battery-powered systems. The device controls the charging path in order to optimize battery life. First, the device monitors the input voltage and current. If an over-voltage or over-current condition is detected, the device will shut down the charging path and display a fault indication. Additionally, the device has reverse charge prevention to ensure that the battery does not supply power to the system, when a full or partially-full battery is connected.

The device operates in two distinct charging modes. In trickle charging mode, a low current (10% of the target charging current) is applied to the battery for a few hours to prevent damage to the battery cells. In fast charging mode, the device increases the charging current to the battery’s maximum capacity. The device is programmed to stop charging when the battery’s capacity reaches its target level or when the charge current has decreased below a certain threshold.

The BQ24023EVM also contains several safety circuits to ensure system reliability. This includes over-temperature protection, voltage fault detection and current limit detection. Over-temperature protection monitors the temperature of the system and shuts down charging if the system temperature reaches a certain threshold. Voltage fault detection monitors the incoming and outgoing voltages and shuts down the system if the voltage exceeds a certain level. Finally, current limit detection monitors the charge current and shuts down the system if the current exceeds a certain level.

In summary, the BQ24023EVM is a power management integrated circuit from Texas Instruments. Designed specifically for lithium-ion battery-powered systems, the device combines several battery power nodes into a single chip for simplified design implementation. The device includes monitoring capabilities, reverse charge prevention, charge fault detection, and programmable over-voltage and over-temperature protection to ensure system reliability. The BQ24023EVM is part of Texas Instruments’ Evaluation and Demonstration Boards and Kits, which simplifies the evaluation process for potential customers.

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