Nxp B.v.

Epcos Ag

Jacobus Govert Sneep

Adrianus Van Bezooijen

Jeroen Kleinpenning

Maurice Adrianus De Jongh

Fred Mostert

Gertjan Van Holland

Hendrikus Van Iersel

Derk Jan Hissink

Tsung-Pin Tang

Patrick John Zeelen

Ronald Van Der Werf

Arjan Van Den Berg

Embodiments of a method and a device are disclosed. In an embodiment, a method for discharging an output capacitor of a power supply is disclosed. The power supply includes a primary side for receiving a signal to be converted and a secondary side for outputting a converted signal. The method involves detecting whether synchronous rectification (SR) circuitry at the secondary side is inactive, determining that the primary side is disconnected from a mains voltage when the SR circuitry is detected to be inactive, and discharging an output capacitor at the secondary side based on the determination that the primary side is disconnected from the mains voltage.

Method and device for discharging output capacitor of power supply

One example discloses a voltage regulator, including: a power supply input; a regulated voltage output; an output transistor coupled to the power supply input and the regulated voltage output; and a current amplifier coupled between the power supply input and the regulated voltage output; wherein the current amplifier is configured to supply a second current from the power supply input to the regulated voltage output when a first current between the power supply input and the output transistor exceeds a threshold current.

Voltage regulator

Disclosed is a charge pump protection device including a power supply voltage, a charge pump to produce an output voltage higher than the power supply voltage, the charge pump including, a pumping capacitor to store voltage during a charging state and to discharge the voltage during a pumping state thereof, a plurality of switches to regulate the charging and pumping states, a charge pump capacitor to store the output voltage, and at least one current limiter in series with at least one of the plurality of switches to limit current and prevent an electrical failure of the charge pump.

Integrated circuit charge pump with failure protection

Embodiments of a driver circuit for a power stage of a class-D amplifier and a class-D amplifier are described. In one embodiment, a driver circuit for a power stage of a class-D amplifier includes serially connected transistor devices connected to a gate terminal of a power transistor of the power stage of the class-D amplifier, a voltage generator connected between a gate terminal of a first transistor device of the serially connected transistor devices and a source terminal of the power transistor, and a current multiplier connected between the gate terminal of the power transistor and one of a source terminal and a drain terminal of the first transistor device. The current multiplier is configured to produce an output current that is proportional to a current at the one of the source terminal and the drain terminal of the first transistor device.

Driver circuit for a power stage of a class-D amplifier

A drive circuit for delivering an AC voltage to an array of electro-luminescent lamps (to) includes a single coil (), the energy in which is transferred to each lamp through a corresponding switch assembly (to) having positive and negative-going paths for conducting positive and negative voltages to the corresponding lamp. The magnitudes of the voltages applied to the parallel-connected lamps are controllable so that the illumination levels of the lamps are individually adjustable.

Drive circuits for electro-luminescent lamps

A communications circuit processes a signal in at least one predetermined communications standard such as GSM or UMTS. A switched capacitor impedance matching unit is provided, controlled by driver control unit. The driver control unit is arranged to control the driver to start switching of the capacitors of the switched capacitor array during transition periods in the signals.

Growing community of inventors

Bavel, Netherlands

Jacobus Govert Sneep