Patent ID: 9130366
Filing Date: 2015-09-08
Classification: F02D,F02P,H02H,H03K

Abstract:
1. An electronic system comprising: a transformer having a primary winding with a first terminal to be coupled to a battery voltage and a second terminal for generating a primary voltage signal; a switch serially coupled to the primary winding and having a control terminal carrying a control voltage signal for opening or closing the switch; a first input terminal coupled to the control terminal of the switch; a second input terminal coupled to the second terminal of the primary winding and coupled to the switch; a third input terminal to be coupled to the battery voltage; a fourth input terminal for receiving a safety shut-down enable signal indicating the activation of a safety discharging phase; a current generator coupled to the first input terminal and configured to generate, during a first phase of the safety discharging phase, a discharge current flowing from the control terminal towards ground to discharge a value of the control voltage signal; a first resistor with a first terminal coupled to the second input terminal and a second terminal of the first resistor carrying a monitoring voltage; and a voltage comparator coupled to the second terminal of the first resistor and configured to compare the value of the monitoring voltage to a threshold voltage value, and to enable the current generator when the value of the monitoring voltage is smaller than the threshold voltage value during the first phase, and to disable the current generator when the value of the monitoring voltage is greater than the threshold voltage value during a second phase.