Stmicroelectronics S.r.l.

Stmicroelectronics Design and Application S.r.o.

Emilio Volpi

Alberto Iorio

Jeanpierre Vicquery

Maurizio Foresta

Jan Novotny

A synchronous rectifier driver circuit is configured to drive a synchronous rectifier FET and includes a first terminal configured to be connected to a source terminal of the synchronous rectifier FET. A second terminal is configured to be connected to a drain terminal of the synchronous rectifier FET, and a third terminal is configured to be connected to a gate terminal of the synchronous rectifier FET. The synchronous rectifier driver circuit is configured to measure the voltage between the second terminal and the first terminal, and detect a switch-on instant in which the measured voltage reaches a first threshold value and a switch-off instant in which the measured voltage reaches a second threshold value. The synchronous rectifier driver circuit generates a drive signal between the third terminal and the first terminal as a function of the measured voltage.

Synchronous rectifier driver circuit, related integrated circuit, electronic resonant converter and method

A method of controlling synchronous rectification transistors in a switching converter includes sensing a drain-to-source voltage across each synchronous rectification transistor each switching half-cycle of the switching converter. An average of the sensed drain-to-source voltage is calculated for each synchronous rectification transistor over N prior switching half-cycles. A load current transient in the switching converter is sensed based on the sensed drain-to-source voltage of each synchronous rectification transistor and the calculated average of the sensed drain-to-source voltage for each synchronous rectification transistor over the N prior switching half-cycles.

Control method and system for prevention of current inversion in rectifiers of switching converters

A voltage comparator for detecting a voltage difference in a high-voltage domain, wherein said comparator receives an input voltage and compares it with a reference voltage also received in input, in which the output voltage from the comparator assumes the logic value 1 if the input voltage is greater than the reference voltage and assumes the logic value 0 if the input voltage is less than or equal to the reference voltage, wherein said comparator comprises low-voltage components and a single high-voltage component. In particular, the low-voltage components are MOS transistors and the high-voltage component is a high-voltage PMOS.

High voltage comparator with low-sensitivity to variations of process/temperature and supply

A method and apparatus for controlling a converter are provided. In the method and apparatus, a converter is operated in accordance with a duty cycle and based on a difference between a feedback signal representing an output voltage of the converter and a reference signal. An overcurrent condition is detected in the converter. In response to detecting the overcurrent condition, the duty cycle used to operate the converter is limited and the reference signal is made to track the feedback signal to mitigate an output voltage overshoot at an end of the overcurrent condition.

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Charvensod, Italy

Emilio Volpi