Self-timed control of multiphase switched capacitor converters

The paper proposes a method to synthesize a digital controller for multiphase switched capacitor converters (SCCs). A specific requirement to the controller is that, regardless of external conditions, it should provide pulses of fixed frequency and width. Asynchronous (self-timed) digital circuits fulfil this requirement by definition. However, their design can be quite complex, especially if an SCC has a large number of switches. The paper shows how, based only on observations and simple rules, one can use an existing CAD tool to synthesize, verify and fit to available library components a circuit of self-timed controller. The simulations demonstrate the operation of the controller designed using the proposed method.