Motor driving circuit

Details Motor driving circuit Motor driving circuit

2011-01-04

2011-01-04

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

C318S375000, C318S379000

Reexamination Certificate

active

07863840

ABSTRACT:
A motor driving circuit comprising: a synchronous rectification driving circuit to carry out synchronous rectification, to energize a driving coil connected between a first connection point at which a first source and first sink side transistors are connected in series and a second connection point at which a second source and second sink side transistors are connected in series; a backflow detecting resistor connected to electrodes of the first and second sink side transistors, the electrodes being on an opposite side of the first and second sink side transistors to the first and second connection points; a backflow detecting comparator to output a comparison signal indicating a result of comparison of voltage between a first and second terminals of the backflow detecting resistor; and a backflow prevention circuit to prohibit the synchronous rectification when the comparison signal indicates that the second terminal is higher in voltage than the first terminal.

REFERENCES:
patent: 6131692 (2000-10-01), Kawasuji
patent: 6288507 (2001-09-01), Makino et al.
patent: 7457136 (2008-11-01), Ozaki
patent: 2002-272162 (2002-09-01), None

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