Patent ID: 7173798

Claim:
DCDC boost and regulation converter overload detector, the converter supplying a load current to a load at an output of the converter with an output voltage (Vout) that can be different from a supply voltage (Vbat), the converter comprising an inductance (L) and a first transistor (TP 0 ) that is made conductive or blocked by a regulation device depending on the quantity of current demanded by the load, the load being distinct from the inductance, characterised in that it has means of capturing an image of the load current at a predetermined smaller scale and means of analysis, which takes the load current image into account to supply overload information when the quantity of current is higher than a predetermined current threshold; characterised in that the means of capturing the load current image are connected to a controlled current source that produces a reference current that is proportional to the predetermined current threshold, at the predetermined scale; and characterised in that the means of analysis includes a comparator that compares the output voltage (Vout) and the voltage of the load current image, the comparator supplying a reset command when the voltage of the load current image is greater than the output voltage.