Patent ID: 8531856

Claim:
A synchronous rectifier bridge member ( 11 , 14 ) comprising: at least a first connection terminal (D 1 , B+); at least a second connection terminal (S 1 , P); at least a first field effect transistor ( 10 , 15 ) including a first drain ( 10 a , 16 ) and a first source ( 10 b , 17 ) connected to said at least first and second terminals (D 1 , B+; S 1 , P) respectively; at least a first operational amplifier ( 7 , U 1 A) comprising a first feedback loop (R, C; R 3 , C 1 ) and a first output ( 8 ) connected to a first gate ( 9 , 21 ) of said first transistor ( 10 , 15 ), said first feedback loop (R, C; R 3 , C 1 ) mounted as a comparator for at least a first voltage source (Uref, Vref) having a pre-determined reference voltage and for at least a first voltage difference (Vds) between applied voltages applied to said at least first and second terminals (D 1 , B+; Si, P); a load pump ( 12 , 25 ) producing at least one of supply voltages (VH, VL) of said first amplifier ( 7 , U 1 A) from said applied voltages; and a circuit ( 27 ) for setting said load pump ( 25 ) in standby when an average frequency of at least one of said applied voltages is less than a pre-determined value.