Constant current charging circuit for power pulsing 2018-09-12 J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011

Typical approaches for power pulsing, (power delivery aspect) Use local storage capacitors, near the point of power dissipassion. - Add linear voltage regulators or DC/DC converters when required - Switch off the load, not the power supply voltage (power down/sleep logic of devices ) in order to keep the bypass/filter capacitor charged. - Use a constant current storage capacitor charging circuit 2018-09-12 J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011

Neglected aspect: the power feed Suggestion: Use a constant current charging circuit for the storage capacitors: Charging current adjusted to the average current Maximum feed current << load peak current DC like power feed (no mechanical vibration) 2018-09-12 J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011

Constant current charging system V(t) Charging at constant current Power feed Load on t i(t) Voltage regulator/ DC-DC converter Controlled current source V(t) Pulsed load Control loop Storage capacitor 2018-09-12 J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011

SPICE model for the constant current charging 2018-09-12 J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011

J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011 2018-09-12 J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011

J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011 2018-09-12 J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011

J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011 2018-09-12 J.P. Martin, UdeM, Power pulsing workshop, Orsay, May 11, 2011