Semiconductor Components Industries, LLC

Motorola Corporation

Ivo Vecera

Jiri Bubla

Zdenek Pfof

Petr Kadanka

Nicolas Cyr

Radim Visinka

Pavel Lajsner

A power supply controller having a shortened reset time due to a small hiccup voltage includes an electrical circuit providing a repeated voltage hiccup of a supply voltage of the controller of a switched-mode power supply (SMPS) when the controller enters a latched state. A plurality of comparators each have an input coupled with the controller supply voltage. A multiplexer and two latches are included, each coupled with one or more comparator outputs, and a restart controller is coupled with an output of one of the latches. The restart controller in various implementations toggles a switch to activate and deactivate a current sink to create the supply voltage hiccup. In other implementations, the switch is excluded and the restart controller toggles a voltage startup transistor to couple and decouple a voltage source with the supply voltage to create the voltage hiccup.

Power supply controller and related methods

An over-power compensation circuit for use in a switched mode power supply having a current sense circuit for sensing a current flowing through a power transistor of the switched mode power supply. The over-power compensation circuit includes a peak detector, a sample-and-hold circuit, a current offset generator, and an offset resistor. The peak detector has an input for receiving an input voltage derived from the input line, and an output. The sample-and-hold circuit has an input connected to the output of the peak detector, and an output. The current offset generator has an input connected to the output of the sample-and-hold circuit, and an output for providing an offset current. The offset resistor has a first terminal connected to the output of the current offset generator, and a second terminal adapted to be connected to a current conducting electrode of the power transistor.

Over power compensation in switched mode power supplies

A variable-frequency oscillator () is formed to change an internal delay of the oscillator inversely proportional to changes in the frequency of the oscillator.

Method of forming a variable frequency oscillator and structure therefor

A method to control a switched reluctance motor (SRM) with a first phase ( ) and a second phase ( ) comprises: aligning the rotor with the second phase ( ); at a first time point (t ), energizing the first phase ( ) with a phase voltage that is substantially constant; monitoring an increase of the phase current (I ) in the first phase ( ) until the phase current reaches a maximum ( ); monitoring a decrease ( ) of the first current (I ) until at a second time point (t ) the phase current (I ) reaches a minimum ( ) and starts to increase again ( ); de-energizing the first phase ( ) at a third time point (t ) that follows the second time point at (t ) at a predetermined time interval; and repeating energizing, monitoring and de-energizing for the second phase ( ) instead of the first phase ( ).

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Ostrava, Czechia

Ivo Vecera