TPS65021EVM-110

Evaluation and Demonstration Boards and Kits: TPS65021EVM-110 application field and working principle

The Texas Instruments TPS65021EVM-110 is an evaluation board that provides users with an easy and convenient way to evaluate the features of the TPS65021 high-efficiency DC/DC step-down converter. Operating with an input voltage of up to 10V, this evaluation board has a typical application field of IOT, portable instrumentation, medical/healthcare, automotive, wearables, consumer electronics, and industrial/commercial appliance sector. The TPS65021EVM-110 is easy to use and provides users with a complete power management solution.

Overview

The TPS65021EVM-110 is an adjustable constant-voltage/constant-current (CV/CC) buck converter. The input voltage range is from 4.5V to 10V and the output voltage range is from 0.6V to 5.5V. The board operates at a maximum output current of 0.6A and a maximum output power of 3.3 watts. It has a wide range of programmable output voltages and current limits. The board incorporates a controller-mode enable pin, overload protection, and thermal protection.

The TPS65021EVM-110 also includes two control loops; a voltage control loop and a current control loop. The voltage control loop monitors the output voltage and maintains it at the programmed limit. The current control loop limits the load current to ensure that the output current does not exceed the maximum peak output current. Additionally, the board\'s internal FETs are rated at 10A and the overall efficiency is typically up to 94.5%.

Powering the Board

The TPS65021EVM-110 is powered by a DC input voltage from 4.5V to 10V. The board supports multiple primary power sources such as USB, batteries, and DC power supplies. To power the board, connect the proper power source to the DCIN connectors. When the DCIN voltage is lower than the board\'s minimum input voltage of 4.5V, the EVM will enter a low voltage shutdown state and should be reset.

Adjustment Potentiometers

The board’s adjustable potentiometers are used to set the desired output voltage and current. The two potentiometers can be adjusted to set the output voltage and current levels. The output voltage is adjusted with the ‘Vout’ potentiometer which requires an input voltage of 3.3V and 6V. The ‘Ilimit’ potentiometer is used to adjust the output current limit.

Setting the Output Voltage

The user can manually adjust the output voltage of the board by changing the position of the ‘Vout’ potentiometer. To set the output voltage, the user should disconnect the board from the power source and then connect a DC power supply to the board. After connecting the DC power supply, the user should adjust the potentiometer to the desired output voltage. The maximum output voltage of the board is 5.5V. The minimum output voltage is 0.6V.

Setting the Output Current Limit

The user can manually adjust the output current limit of the board by changing the position of the ‘Ilimit’ potentiometer. To set the output current limit, the user should disconnect the board from the power source and then connect a DC power supply to the board. After connecting the DC power supply, the user should adjust the potentiometer to the desired output current limit. The maximum output current limit of the board is 0.6A. The minimum output current limit is 0.2A.

Conclusion

The TPS65021EVM-110 evaluation board is a convenient and easy way to evaluate the features of the TPS65021 high-efficiency DC/DC step-down converter. It provides a complete power management solution with adjustable output voltage and current limits, various primary power sources options, overload protection, and thermal protection. The board is suitable for a wide range of applications in the IOT, portable instrumentation, medical/healthcare, automotive, wearables, consumer electronics, and industrial/commercial appliance sectors.