Patent ID: 7183756

Claim:
A power management system ( 100 ) comprising: a power generator ( 1 ), providing a supply signal (Vchg) to a load ( 2 ), for a floating controllable bi-directional current sensor (N 1 ) coupled via a first connection ( 10 ) to the power generator and via a second connection ( 20 ) to the load ( 2 ) for detecting a positive current (pos) flowing from the power generator ( 1 ) to the load ( 2 ) and a negative current (neg) from the load ( 2 ) to the power generator ( 1 ), and a current management block ( 3 ) coupled to a control terminal (G) of the floating controllable bi-directional current sensor (N 1 ) and to the first and second connections ( 10 , 20 ) for controlling an equivalent resistance between the first connection ( 10 ) and the second connection ( 20 ), for providing a first current (Ipos), which is proportional with the positive current (pos) and, for providing a second current (Ineg), which is proportional with the negative current (neg).