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Charge Pump

Pulse-based Control Application

A charge pump is a DC-DC converter that uses capacitors for energetic charge storage to create different voltage levels. It can be used to provide additional voltage levels for powering specific interface circuits, sensors etc.

Ingredients

Any GreenPAK
Two capacitors
Two diodes

GreenPAK Diagram

Design Steps

Set the divider inOSC1obtain the desired output frequency.
Configure logic to provide a shutdown function, either through IO or I²C (if available)
Connect a diode (D1) and C_pumpbetween VDD and CP_DRIVE.
Connect the anode of D2 to the cathode of D1.
Connect C_outand R_loadin parallel between the cathode of D2 and ground.

Resources

GreenPAK Designer files

Charge Pump GP(12.2 KB)

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