Switch mode power supply module having a hiccup mode and item of equipment powered by said module

摘要

The invention relates to switch mode power supply modules and items of equipment powered by these modules. The power supply module comprises circuits for cyclically interrupting the switching operation, during a so-called switching operation interruption phase, if the load current of the module is less than a current threshold value and sustaining the switching operation, during a so-called switching operation phase, if the load current is greater than the load current threshold value and circuits for ending the switching operation interruption phase if the power supply voltage of the item of equipment is greater than a voltage threshold value. The item of equipment powered by the module comprises a capacitive element able to store energy from the module during the switching operation phase and to release the energy stored between the output terminals of the power supply module when it receives an activation signal.

主权项

1. Device comprising
an item of equipment; a switch mode power supply module intended to supply power to said item of equipment and comprising a circuit for measuring a power supply voltage present between power supply rails, wherein: said item of equipment comprises a capacitive element connected between power supply rails and an activation circuit, said capacitive element is suitable for storing energy during a switching operation phase of the switch mode power supply module and for supplying the stored energy to said activation circuit during a switching operation interruption phase of the switch mode power supply module; said activation circuit is suitable for applying between said power supply rails the voltage present at the terminals of the capacitive element when said item of equipment is started or woken up by an activation signal, and said switch mode power supply module is suitable for ending the switching operation interruption phase as a function of the measured power supply voltage.