Abstract: A circuit comprises a controller configured to receive an input voltage and control a power converter to provide an output voltage based on the input voltage. The controller is also configured to receive a feedback voltage from a split feedback divider, the feedback voltage based on the output voltage and control the power converter to provide the output voltage based on the input voltage and the feedback voltage.

Abstract: A circuit comprises a controller configured to receive an input voltage and control a power converter to provide an output voltage based on the input voltage. The controller is also configured to receive a feedback voltage from a split feedback divider, the feedback voltage based on the output voltage and control the power converter to provide the output voltage based on the input voltage and the feedback voltage.

Abstract: An average current mode buck-boost DC to DC converter has a buck stage coupled between an input voltage source terminal and an output terminal. A boost stage is coupled between the input voltage source terminal and the output terminal. A current ramp control circuit generates a ramp signal for driving the buck and boost stages, the ramp signals being coupled to the buck and boost stages. A constant voltage related to the desired output voltage by a constant is applied directly to both a voltage control feedback loop for adjusting the output voltage and directly to an input to the current ramp control circuit, whereby the output voltage can be shifted from one voltage to another by feedforward control.

Abstract: An average current mode buck-boost DC to DC converter has a buck stage coupled between an input voltage source terminal and an output terminal. A boost stage is coupled between the input voltage source terminal and the output terminal. A current ramp control circuit generates a ramp signal for driving the buck and boost stages, the ramp signals being coupled to the buck and boost stages. A constant voltage related to the desired output voltage by a constant is applied directly to both a voltage control feedback loop for adjusting the output voltage and directly to an input to the current ramp control circuit, whereby the output voltage can be shifted from one voltage to another by feedforward control.

Abstract: A system in package and a method for manufacturing the same is provided. The system in package comprises a laminate body having a substrate arranged inside a laminate body. A semiconductor die is embedded in the laminate body and the semiconductor is bonded to contact pads of the substrate by help of a sintered bonding layer, which is made from a sinter paste. Lamination of the substrate and further layers providing the laminate body and sintering of the sinter paste may be performed in a single and common curing step.

Abstract: An average current mode buck-boost DC to DC converter has a buck stage coupled between an input voltage source terminal and an output terminal. A boost stage is coupled between the input voltage source terminal and the output terminal. A current ramp control circuit generates a ramp signal for driving the buck and boost stages, the ramp signals being coupled to the buck and boost stages. A constant voltage related to the desired output voltage by a constant is applied directly to both a voltage control feedback loop for adjusting the output voltage and directly to an input to the current ramp control circuit, whereby the output voltage can be shifted from one voltage to another by feedforward control.

Abstract: An average current mode buck-boost DC to DC converter has a buck stage coupled between an input voltage source terminal and an output terminal. A boost stage is coupled between the input voltage source terminal and the output terminal. A current ramp control circuit generates a ramp signal for driving the buck and boost stages, the ramp signals being coupled to the buck and boost stages. A constant voltage related to the desired output voltage by a constant is applied directly to both a voltage control feedback loop for adjusting the output voltage and directly to an input to the current ramp control circuit, whereby the output voltage can be shifted from one voltage to another by feedforward control.

Abstract: An electronic device for DC-DC conversion of an input voltage into an output voltage is provided. The electronic device includes a current mode control loop for controlling a sensed current of the DC-DC conversion by comparing a voltage level indicating a magnitude of the sensed current with a reference voltage level indicating the maximum admissible magnitude of the sensed current. The reference voltage level is dynamically adjusted in response to a change of an input voltage level.

Abstract: An electronic device includes a circuit for measuring a current in an inductor, wherein the current in the inductor is controlled by alternately switching a first power transistor and a second power transistor each having a first electrode, a second electrode and a control gate. The measuring circuit includes a first sense transistor having a first electrode, a second electrode and a control gate, the first sense transistor having the control gate coupled to the control gate of the first power transistor. A second electrode is coupled to the second electrode of the first power transistor. A second sense transistor has a first electrode, a second electrode and a control gate, the second sense transistor having the control gate coupled to the control gate of the second power transistor and having the second electrode coupled to the second electrode of the second power transistor.

Abstract: An electronic device includes circuitry for driving a light-emitting diode (LED) or other light-emitting semiconductor device.

Abstract: A converter has a single inductor with a first terminal connectable to a first terminal of the supply input through a first power transistor and a second terminal connectable to a second terminal of the supply input through a second power transistor. A first rectifier element connects the first terminal of the inductor with a first output terminal, and a second rectifier element connects the second terminal of the inductor with a second output terminal. A resistive voltage divider is connected between the first and second output terminals. A control circuit uses an input from the voltage divider as a reference input voltage and provides an output current to the second terminal of the supply input in response to any voltage difference between the reference input voltage and the second terminal of the supply input. This provides a virtual common reference potential at the second terminal of the supply input, which is thus a common ground (GND) terminal.

Abstract: An electronic device for DC-DC conversion of an input voltage into an output voltage is provided. The electronic device includes a current mode control loop for controlling a sensed current of the DC-DC conversion by comparing a voltage level indicating a magnitude of the sensed current with a reference voltage level indicating the maximum admissible magnitude of the sensed current. The reference voltage level is dynamically adjusted in response to a change of an input voltage level.

Abstract: An electronic device includes a circuit for measuring a current in an inductor, wherein the current in the inductor is controlled by alternately switching a first power transistor and a second power transistor each having a first electrode, a second electrode and a control gate. The measuring circuit includes a first sense transistor having a first electrode, a second electrode and a control gate, the first sense transistor having the control gate coupled to the control gate of the first power transistor. A second electrode is coupled to the second electrode of the first power transistor. A second sense transistor has a first electrode, a second electrode and a control gate, the second sense transistor having the control gate coupled to the control gate of the second power transistor and having the second electrode coupled to the second electrode of the second power transistor.

Abstract: A converter has a single inductor with a first terminal connectable to a first terminal of the supply input through a first power transistor and a second terminal connectable to a second terminal of the supply input through a second power transistor. A first rectifier element connects the first terminal of the inductor with a first output terminal, and a second rectifier element connects the second terminal of the inductor with a second output terminal. A resistive voltage divider is connected between the first and second output terminals. A control circuit uses an input from the voltage divider as a reference input voltage and provides an output current to the second terminal of the supply input in response to any voltage difference between the reference input voltage and the second terminal of the supply input. This provides a virtual common reference potential at the second terminal of the supply input, which is thus a common ground (GND) terminal.

Abstract: A buck-boost DC/DC converter includes an inductor and a power stage having a set of switches selectively connecting the inductor between a voltage input, a voltage output and a reference level in accordance with buck or boost mode. The converter has a switch control providing control signals to the set of switches in the power stage. A comparator provides to the switch control a first pulse width modulation signal in buck mode and a second pulse width modulation signal in boost mode. A ramp generator provides to the comparator a first ramp signal for buck mode and a second ramp signal for boost mode. An overlap control provides a ramp shift signal to the ramp generator in response to a detection signal that indicates activity of the switches in the power stage. The ramp shift signal adjusts the first and second ramp signals relative to each other so as to minimize any gap and any overlap between the first and second ramp signals.

Abstract: An electronic device includes circuitry for driving a light-emitting diode (LED) or other light-emitting semiconductor device.

Abstract: For controlling the light intensity in a multi-lamp illumination device an automatic sequencing of the PWM dimming distributes the burst dimming pulses during the display's frame period. Specifically, the method includes the steps of generating a plurality of synchronized pulse-width modulated lamp activation signals of equal duty-cycles; individually controlling the phase of each lamp activation signal within the frame periods; and separately supplying each lamp of the illumination device with one of the lamp activation signals. The lamp activation signals are preferably all derived from a common pulse-width modulated intensity control signal. By evenly distributing the lamp activation signals, or pulses, within the display's frame period, the EMI emission is minimized, the refresh rate is artificially enhanced, and the peak to average current is reduced.

Abstract: A buck-boost DC/DC converter includes an inductor and a power stage having a set of switches selectively connecting the inductor between a voltage input, a voltage output and a reference level in accordance with buck or boost mode. The converter has a switch control providing control signals to the set of switches in the power stage. A comparator provides to the switch control a first pulse width modulation signal in buck mode and a second pulse width modulation signal in boost mode. A ramp generator provides to the comparator a first ramp signal for buck mode and a second ramp signal for boost mode. An overlap control provides a ramp shift signal to the ramp generator in response to a detection signal that indicates activity of the switches in the power stage. The ramp shift signal adjusts the first and second ramp signals relative to each other so as to minimize any gap and any overlap between the first and second ramp signals.

Abstract: For controlling the light intensity in a multi-lamp illumination device an automatic sequencing of the PWM dimming distributes the burst dimming pulses during the display's frame period. Specifically, the method includes the steps of generating a plurality of synchronized pulse-width modulated lamp activation signals of equal duty-cycles; individually controlling the phase of each lamp activation signal within the frame periods; and separately supplying each lamp of the illumination device with one of the lamp activation signals. The lamp activation signals are preferably all derived from a common pulse-width modulated intensity control signal. By evenly distributing the lamp activation signals, or pulses, within the display's frame period, the EMI emission is minimized, the refresh rate is artificially enhanced, and the peak to average current is reduced.

Abstract: A circuit configuration for driving a light-emitting diode (D1 to D6) by means of a current provided by a supply voltage source (12) includes an inductance (14) connected in series between the supply voltage source (12) and the LED (D1 to D6). A switch (16) that can be either in the open or in the closed position and that is connected between the junction of the inductance (14) with the LED (D1 to D6) and ground, which, when in the closed position, short-circuits the LED (D1 to D6). A control circuit (18) which takes the switch (16) into its open position when the current flowing through the inductance (14) has risen to a pre-determined value, and which takes the switch (16) into its closed position when the current through the LED (D1 to D6), or the voltage across the LED (D1 to D6), has fallen to a pre-determined value.