Abstract: A switching power converter is provided that cycles a power switch during a group pulse mode of operation to produce a train of pulses within a group period responsive to a control voltage being within a group mode control voltage range. Depending upon the control voltage, the number of pulses in each train of pulses is varied to provide a linear power delivery to the load.

Abstract: An electronic device is provided that includes an integrated circuit (IC) configured to regulate an output voltage for powering a light emitting diode (LED). A first transistor is configured to be switched on or off by the IC to inductively couple or decouple a main power supply bus voltage from a primary winding of a transformer to a secondary winding of the transformer connectable to the LED. A second transistor is coupled between the IC and the main power supply bus voltage, and configured to be switched on or off by the IC to selectively provide an IC power supply input voltage to the IC.

Abstract: A single configuration terminal of a device is used to configure multiple operating parameters of the device based on a resistor and a capacitor selectively connected to the configuration terminal. The device includes a detection circuit configured to monitor a voltage signal at the configuration terminal to determine multiple values in response to a regulated current source providing a current to the configuration terminal selectively connected to the resistor and the capacitor in parallel, and configure multiple operating parameters based on the determined values. A method for configuring operating parameters using a single configuration terminal of a device includes providing a current to the configuration terminal selectively connected to a resistor and a capacitor in parallel, monitoring a voltage signal at the configuration terminal, determining multiple values based on the monitoring, and configuring multiple operating parameter based on the determined values.

Abstract: A circuit for driving a power switch is presented. The circuit includes a first power switch coupled to a second power switch via a switching node and a driver coupled to the first power switch, where the driver contains an energy storing element coupled to the switching node. The circuit also contains a sensor to sense an electrical parameter of the driver and a charger coupled to the sensor. The charger provides a charge current to charge the energy storage element, and to control the charge current based on the electrical parameter. In particular, a circuit for driving a power switch based on a III/V semiconductor is presented. In addition, a method of powering a power switch driver is presented. The method includes sensing an electrical parameter of the driver and adjusting a current to charge the energy storing element based on the electrical parameter.

Abstract: A solid state driver circuit that is compatible with either a low frequency mains or magnetic ballast supply or a high frequency electronic ballast input is presented. An input detection circuit detects the frequency of the supply and selectively adjusts the drive circuit to act as a linear regulator when an electronic ballast is detected, or as a switched mode regulator when mains or a magnetic ballast is detected. There is also provided a method of driving a solid state lamp. The method has a step which receives an input power supply. The method also has an enabling operation of a switching regulator or the shorting of a switching regulator according to the frequency of the input power supply.

Abstract: A direct AC LED lighting device is provided with a low-pass filter for filtering a threshold time in which a post diode bridge voltage exceeds an LED threshold voltage during a current AC half cycle for the post diode bridge voltage.

Abstract: A voltage sensing circuit for a switching power converter includes a comparator having a comparator input stage that processes a voltage from a main DAC and a current from a tracking DAC.

Abstract: An apparatus and method for blocking electromagnetic interference, EMI is presented. In particular, the present invention relates to a switched mode power supply provided with an electromagnetic interference protection circuit with low power dissipation. There is provided an adiabatically-switched electromagnetic interference protection circuit. The protection circuit contains a first charge storage element and a second charge storage element. A switching regulator operates with a switching cycle having an on-time and an off-time; and the control signal is arranged to cause a transition between the first mode and the second mode to start during the off-time of a switching cycle of the switching regulator.

Abstract: An object of the disclosure is to take a CMOS varactor structure (NMOS in N-well or PMOS in P-well) and turn it in to a three terminal on-chip tuneable diffusion resistor. The diffusion resistor can be made with an n+ diffusion inside the p-substrate, or with a p+ diffusion inside an N-well that lies within the p-substrate. The resistor can be implemented in any existing CMOS or BICMOS silicon technology, without using additional masks. The resistor can be also implemented in a technology with FINFETs.

Abstract: A switching power converter provides regulated voltage to a load. The switching power converter comprises a transformer including a primary winding coupled to an input voltage and a secondary winding coupled to an output of the switching power converter. The switching power converter further comprises a power switch coupled to the primary winding and a rectifier coupled to the secondary winding. Current is generated in the primary winding responsive to the power switch being turned on and not generated responsive to the power switch being turned off. A detection circuit measures a voltage across the rectifier. If the detection circuit detects a decrease in the voltage across the rectifier outside of a blanking period, the detection circuit generates a current pulse in the secondary winding of the transformer.

Abstract: A switching power converter is provided that includes a current source that controls the charging of a storage capacitor to provide a regulated internal power supply voltage.

Abstract: An isolated switching power converter is provided wherein a secondary side is valley mode switched to transmit data to a primary side. This provides secondary side regulation without the need for an optocoupler. Data communication between the primary and secondary sides of switching power converters is presented.

Abstract: A flyback converter is provided with a synchronous rectifier (SR) controller including a pulse linear regulator (PLR) charging path and an LDO charging path. The SR controller is configured to monitor the switching period and/or duty cycle of a power switch in the flyback converter to select between the PLR and LDO charging paths.

Abstract: A LED lighting system, such as a dimmable LED lamp, that may simulate the performance of an incandescent bulb. LED strings of different colors may be connected to the output of a single LED driver that regulates an overall intensity of light produced by the LED lighting system. The color of the LED lighting system may be controlled by circuitry, such as one or more switches, that allocates current between the LED strings to change the color temperature of light emitted by the LED lighting system as the light intensity changes.

Abstract: A switching power converter is provided that transitions between output voltage modes over a delay period using at least one of an adaptive resistor and an adaptive reference voltage circuit.

Abstract: A switching power converter is provided with a power-on-reset (POR) circuit that discharges essentially no current until a power supply voltage exceeds a POR threshold voltage.

Abstract: A controller for a switching power converter is provided with a single detection pin through which the controller monitors whether the switching power converter is connected to an AC mains. Should a voltage for the detection pin indicate that the switching power converter is disconnected from the AC mains, the controller asserts the detection pin voltage to trigger a bleeder circuit to discharge an X class capacitor.

Abstract: Systems, methods, and apparatus for a circuit with adaptive switching frequency control are disclosed. The method comprises operating a controller of the dimmable single-stage power converter in pulse width modulation (PWM) mode at a first switching frequency level from a maximum dimming duty-ratio level until a first dimming duty-ratio level. The method further comprises operating the controller in PWM mode, while reducing switching frequency from the first switching frequency level to a second switching frequency level, from the first dimming duty-ratio level until a second dimming duty-ratio level. Also, the method comprises operating the controller in PWM mode at the second switching frequency level from the second dimming duty-ratio level until a current command (Vipk) falls below a predetermined low limit value. Further, the method comprises operating the controller in skip mode, while reducing the switching frequency from the second switching frequency level, until a minimum dimming duty-ratio level.

Abstract: Embodiments described herein describe a switching power converter that includes a switch, an inductor, a diode, and a controller that generates a control signal to turn on and turn off the switch. The controller generates the control signal by generating a reference signal, integrating a difference between a voltage value of the generated reference signal, and a voltage difference between voltage values of the switching node and the second output terminal, and generating the control signal by processing the integrated voltage difference.

Abstract: A switching power converter controller is provided that includes a VCC charging switch transistor coupled between a drain of a power switch transistor and a storage capacitor.