qoistoochee128

12V adapter buck-boost digital display power module

Overview

The boost chip xl6019 is used for boosting. The output voltage can be adjusted using the rheostat knob. When Vin=12V, the adjustment range is 12.2~33.5V.

The buck chip xl1509 is used to reduce the voltage. The output voltage can be adjusted using the rheostat knob. When Vin=12V, the adjustment range is 5.0~11.7V.

Output ripple, load, etc. have not been tested yet.

The switch and display are controlled by stc8h8k64u microcontroller

When displaying temperature, the fourth digit of the digital tube displays a lowercase c. When displaying voltage, the first digit of the digital tube displays an uppercase H or L, indicating the boost/step-down channel.

Program setting, when the internal temperature exceeds 100℃, the buzzer will alarm and enable the DCDC chip to shut down.

Design Files

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Update:2025-06-19 01:18:16

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