Although the PowerPACk32 module can operate with any voltage between 25V and 160V, the internal circuitry requires different voltage rails such as 12V (for gate driving), 5V (for internal logic), 3.3V (for analog blocks) and 1.8V for the microcontroller core. Most embedded systems would require a series of step down voltage regulators to take the battery input and generate all of these rails. Yet, one of the beauties behind the PAC5232 is it contains all of the voltage rails required to operate within the application.

For the PowerPACk32 module, we are leveraging the internal DC/DC Buck converter which will take the 25V to 160V DC voltage and generate the 12V used for gate driving. A second DC/DC Buck converter takes the 12V and steps it down to the 5V we need for the logic. Cascaded from this rail, internal LDO's generate 3.3V and 1.8V for the analog Blocks as well as the MCU core.

All we needed to add were some ceramic caps for the LDO based rails, an inductor for the 5V Buck, and the DC/DC Buck converter components to generate the 12V rail. The PAC5232 controls, as well as monitors, all of these voltage rails.