INSTRUMENTING SWITCH MODE POWER SUPPLY TO MEASURE CIRCUIT POWER CONSUMPTION

摘要

A circuit includes a pulse generator coupled to a switch mode power supply. The switch mode power supply includes a switching component configured for transferring a charge to an energy storage component in response to pulses provided by the pulse generator. A pulse counter is coupled to the pulse generator or the switching component and configured to count pulses over a time period and thereby generate a pulse count. A converter coupled to the pulse counter is configured to generate a power measurement for the time period based on the pulse count. If the switch mode power supply has different modes of operation, a different counter may be used for each mode.

主权项

1. A circuit comprising:
a pulse generator configured to generate pulses; a switch mode power supply coupled to the pulse generator, the switch mode power supply including a switching component configured to transfer a charge to an energy storage component in response to pulses provided by the pulse generator; a pulse counter coupled to the pulse generator or the switching component and configured to count pulses over a time period to thereby generate a pulse count; and a converter coupled to the pulse counter and configured to generate a power measurement for the time period based on the pulse count.