US 12,308,773 B2 · Full-bridge circuit module and circuit system with over-temperature protection mechanism

Abstract

A full-bridge circuit module with an over-temperature protection mechanism for driving an inductive load includes a full-bridge circuit and a comparator module. When the over-temperature protection mechanism is triggered, four switching transistors of the full-bridge circuit are turned off, and two body diodes of corresponding twos of the four switching transistors which are electrically connected to each other via the inductive load are conductive to form a load current flowing through the inductive load. When the load current causes a first output voltage of a first output terminal of the full bridge circuit to drop to a first comparison voltage and causes a second output voltage of a second output terminal of the full bridge circuit to reach a second comparison voltage, the comparator module controls the corresponding twos of the four switching transistors which are electrically connected to each other via the inductive load to be turned on.

Claims17

Dependent claims

A full-bridge circuit module with an over-temperature protection mechanism for driving an inductive load, comprising:

a full-bridge circuit comprising four switching transistors, and having a first output terminal and a second output terminal, wherein said inductive load is electrically connected between said first output terminal and said second output terminal;
a comparator module electrically connected to said full-bridge circuit;
and
wherein when said over-temperature protection mechanism of said full-bridge circuit module is triggered, said four switching transistors of said full-bridge circuit are turned off, and two body diodes of corresponding twos of said four switching transistors which are electrically connected to each other via said inductive load form a path to generate a load current flowing through said inductive load;
wherein when a first output voltage of said first output terminal is lower than a first comparison voltage and a second output voltage of said second output terminal is higher than a second comparison voltage, said comparator module controls said corresponding twos of said four switching transistors to be turned on.

2 more elements

A circuit system, comprising:

a full-bridge circuit module, comprising
a full-bridge circuit comprising four switching transistors, and having a first output terminal and a second output terminal, wherein said inductive load is electrically connected between said first output terminal and said second output terminal;
a comparator module electrically connected to said full-bridge circuit;
and
wherein when said over-temperature protection mechanism of said full-bridge circuit module is triggered, said four switching transistors of said full-bridge circuit are turned off, and two body diodes of corresponding twos of said four switching transistors which are electrically connected to each other via said inductive load form a path to generate a load current flowing through said inductive load, wherein when a first output voltage of said first output terminal is lower than a first comparison voltage and a second output voltage of said second output terminal is higher than a second comparison voltage, said comparator module controls said corresponding twos of said four switching transistors which are electrically connected to each other via said inductive load to be turned on;
and
said inductive load.

4 more elements

Dependencies are inferred from the claim text.

Full-bridge circuit module and circuit system with over-temperature protection mechanism

Life of this patent

Full-bridge circuit module and circuit system with over-temperature protection mechanism

Life of this patent

Abstract

Claims17