mPSU (Mini Power Supply)

The mini power supply (mPSU) boards combine the functionality of voltage booster as well as PWM control via a 555 timer both with potentiometer for control.

Another objective for this design was to make it easy to integrate in other designs and to make it configurable to suit the user’s specific needs without having to modify the board. This includes features like being able to use up to 15 volts input and down to 5V [change, maybe down to 3.3v], an option to bypass the PWM control, and through hole options for most of the components on the makers version of the board. On the compact version, nearly all components are SMD to take up as little space as possible.

Please contact me for most current schematic!

The board is made up of 2 primary sections, the boost module, and the PWM module. The boost module uses an XL6019 boost chip to achieve boosts up to 35V. The PWM module uses any common variant of the NE555 timer. The PWM signal is controlled with a potentiometer (or two fixed resistors). The signal is then sent to the IRLZ44N that controls the continuity of the device to ground on the ground side of the device. This function can be bypassed by using a jumper, or a switch to enable and disable PWM control.