Methods and Circuits for Reverse Battery Protection

摘要

A circuit is configured for providing reverse battery protection. The circuit includes a load driver circuit having at least a first half-bridge circuit with topside and bottomside transistors coupled at a midpoint node by a first current terminal of both the topside and bottomside transistors. A second current terminal of the bottomside transistor is coupled to a voltage common node. The circuit also includes: a reverse battery protection transistor having a first current terminal coupled to a battery supply node and a second current terminal coupled to a second current terminal of the topside transistor; a bootstrap capacitor having a first terminal coupled to a the midpoint node between the topside and bottomside transistors of the first half-bridge circuit; and a diode having an anode coupled to a second terminal of the bootstrap capacitor and a cathode coupled to a control terminal of the reverse battery protection transistor.

主权项

1. A circuit configured for providing reverse battery protection, the circuit comprising:
a load driver circuit comprising at least a first half-bridge circuit, with each half-bridge circuit having a topside transistor and a bottomside transistor coupled at a corresponding midpoint node by a first current terminal of both the topside and bottomside transistors, wherein a second current terminal of each bottomside transistor is coupled to a voltage common node; a reverse battery protection transistor having a first current terminal coupled to a battery supply node and a second current terminal coupled to a second current terminal of each topside transistor; a first capacitor having a first terminal coupled to a first midpoint node between first topside and bottomside transistors of the first half-bridge circuit; a first diode having an anode coupled to a second terminal of the first capacitor and a cathode coupled to a control terminal of the reverse battery protection transistor.