Infineon Technologies Austria Ag

Infineon Technologies Ag

Applied Materials, Inc.

Xiao Wu Gong

Yong Siang Teo

Michael Herfurth

Yi He

Kok Kee Lim

Meng Kiat Jeoh

John Leonard Sudijono

Marc Fahlenkamp

Jing Hu

Tuck Meng Chan

Siu Kam Kok

Junyang Luo

Xinke Wang

Harald Zoellinger

Devices comprising a resistance-switching polymer film are described. Also described are methods of making the devices comprising the resistance-switching polymer film.

Resistance-switching polymer films and methods of manufacture

In accordance with an embodiment, a method of operating a switched-mode power converter includes measuring an input voltage of the switched-mode power converter; determining an on-time of a switch of the switched-mode power converter; determining an off-time of the switch of the switched-mode power converter; and determining an output voltage of the switched-mode power converter based on the measured input voltage, the determined on-time and the determined off-time. The output voltage includes a voltage at a first node having a DC path to a load path of the switch.

System and method for a switched-mode power supply

Disclosed is a voltage converter and a method. The voltage converter includes: an input, an output, and a transformer including a primary winding and a secondary winding; a primary side circuit comprising at least one switch and coupled between the input and the primary winding; a secondary side control circuit coupled to the output. The primary side circuit is configured to receive a feedback signal from the secondary side control circuit. The secondary side control circuit is configured to generate an error signal based on an output signal of the voltage converter, and to modulate the error signal based on supplemental information to generate the feedback signal.

Voltage converter circuitry and methods implementing modulated feedback signal

In accordance with an embodiment, a method of operating a switched-mode power supply includes turning on a semiconductor switch coupled to a primary winding of a transformer for a first time period of a first cycle, turning off the semiconductor switch for a second time period of the first cycle, detecting a change in slew rate of a voltage at an output node of the semiconductor switch, determining a switch turn-on time based on detecting the change in the slew rate, and turning on the semiconductor switch at the determined switch turn-on time for a first time period of a second cycle.

In accordance with an embodiment, a switched-mode power converter includes a switch, a freewheeling diode coupled between an output terminal of the switch and a power supply input node, an inductor coupled between the output terminal of the switch and a power supply output node, and a passive network having a first terminal coupled to the output terminal of the switch, a second terminal coupled to a power supply output node, and a third terminal coupled to a reference terminal of the switch. A method includes measuring a first voltage at a fourth terminal of the passive network when the switch is on; measuring a second voltage at the fourth terminal of the passive network when the switch is off; and estimating an output voltage between the power supply output node and the reference terminal of the switch based on the first voltage and the second voltage.

A switching power converter includes an inductor coupled to a terminal operably supplied with an input voltage. A semiconductor switch is coupled to the inductor and configured to enable and disable an input current passing through the inductor in accordance with a drive signal. A current sense circuit is coupled to the inductor or the semiconductor switch and is configured to generate a current sense signal representing the input current passing through the inductor or the semiconductor switch. A control circuit receives the current sense signal and is configured to: close the semiconductor switch regularly in accordance with a clock frequency, to integrate the current sense signal thus providing an integrated current sense signal to compare the integrated current sense signal with a threshold that is a function of the input voltage.

Switched mode power supply

In accordance with an embodiment, a method of operating a switched-mode power supply includes synchronously rectifying a current in a secondary side of the switched-mode power supply by detecting a voltage drop of a secondary winding of a transformer and activating a semiconductor switch coupled to the secondary winding when the voltage drop is detected. The method also includes determining a digital signal transmitting the digital signal to a controller coupled to a primary winding of the transformer by switching the semiconductor switch in accordance with the digital signal.

In accordance with an embodiment, a method of operating a switched-mode power supply includes detecting a voltage decrease in a secondary winding of a transformer by detecting a first voltage transient using a sensor capacitively coupled to the secondary winding of the transformer. A secondary switch coupled to the secondary winding of the transformer is turned on based on when the first voltage transient is detected.

In accordance with an embodiment, a method of operating a switched-mode power supply includes receiving power from an input node via a first transistor, providing a first portion of the received power to a load via a switching transistor having a first terminal coupled to the first transistor and a second terminal coupled to the load via a series resistor and a series inductor, measuring a current through the load, measuring comprising monitoring a voltage across the series resistor; and controlling an average current through the load by switching on and switching off the switching transistor according to the measured current.

An integrated circuit includes an operational amplifier configured to receive a current sense voltage (V) at a first input and an offset voltage at a second input. A comparator is coupled to the operational amplifier and adapted to receive at a first input an output voltage signal (V) of the operational amplifier. A voltage limiting circuit is configured to receive a regulation voltage. A fold back correction circuit is coupled to the voltage limiting circuit and to a second input of the comparator. A pulse width modulator circuit is coupled to the comparator and is adapted to receive the output of comparator.

Method and apparatus for regulating power in a flyback converter

A control circuit for a power supply having a controllable switch for switching a current through a first transformer winding and a voltage providing circuit for providing an output voltage based on a voltage generated in a second transformer winding has a comparing unit for generating a comparison signal. The control circuit has a threshold signal modulation circuit adapted to modulate the threshold signal that the comparison signal is activated as soon as the input signal crosses a first threshold value, if the current flowing through the switch exhibits a first current slope rate, and that the comparison signal is activated as soon as the input signal crosses a second threshold value, if the current flowing through the switch exhibits a second current slope rate smaller than the first rate. For a given voltage, the first threshold is smaller than the second threshold.

Control circuit for a switching power supply, method for controlling a switching power supply and computer program

Some embodiments of the invention include an integrated circuit having a node or pin to detect a first information during a first a detection period and to detect a second information during a second detection period. In some embodiments, the information at the pin may allow the integrated circuit to operate in a quasi-resonant operation. Other embodiments are described and claimed.

Apparatus, system, and method for multifunctional pin in an integrated circuit

In a switching mode power supply, an input received from the secondary side of the transformerand indicative of the power being drawn by the loads is used to control the timing of bursts. The input is compared with two threshold different threshold values V, V, and switching is enabled if the input rises above a first higher threshold value V, and disabled if it falls below a second lower threshold value V. A memory device FFcontrols a current limitation circuit which limits currents in the primary of the transformer when the switching mode power supply is operating in the burst mode.

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Singapore, Singapore

Xiao Wu Gong