US 12,341,499 B2
High-immunity, self-protected and bidirectional isolated controller without any complex component
Francis Abdesselam, Chatou (FR)
Assigned to THALES, Courbevoie (FR)
Filed by THALES, Courbevoie (FR)
Filed on Jul. 13, 2022, as Appl. No. 17/864,278.
Claims priority of application No. 2107579 (FR), filed on Jul. 13, 2021.
Prior Publication US 2023/0014264 A1, Jan. 19, 2023
Int. Cl. H03K 17/082 (2006.01); G01R 19/165 (2006.01); G01R 31/52 (2020.01); G01R 31/27 (2006.01)
CPC H03K 17/082 (2013.01) [G01R 19/16571 (2013.01); G01R 31/52 (2020.01); G01R 31/27 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A power stage comprising a control device and a power transistor connected to the control device in order to be driven by the control device, the control device comprising:
a primary circuit and a secondary circuit, the primary circuit comprising:
a control module able to generate a control current it, wherein the control module comprises an oscillator able to generate a predefined pulsed wave based on a control signal originating from outside the power stage and a full bridge, connected to the oscillator, able to generate the control current it on the basis of the predefined pulsed wave in a direction of the primary winding of the pulse transformer,
a primary circuit malfunction detector able to detect a malfunction of the primary circuit, wherein the primary circuit malfunction detector is configured to detect an overcurrent in the primary circuit,
a pulse transformer comprising a primary winding connected to the primary circuit, the pulse transformer comprising a secondary winding connected to the secondary circuit, magnetically coupled to the primary winding and able to generate, from the control current it, an induced pulse current im in the direction of the secondary circuit, the induced pulse current im making it possible to drive the power transistor,
the secondary circuit comprising:
a power and fault detection controller, connected to the secondary winding of the pulse transformer and to the power transistor, able to detect a malfunction of the secondary circuit and/or of the power transistor,
the power and fault detection controller being able to communicate the malfunction of the secondary circuit and/or of the power transistor to the primary circuit malfunction detector.