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Fairchild Semiconductor Corporation patents


Recent patent applications related to Fairchild Semiconductor Corporation. Fairchild Semiconductor Corporation is listed as an Agent/Assignee. Note: Fairchild Semiconductor Corporation may have other listings under different names/spellings. We're not affiliated with Fairchild Semiconductor Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "F" | Fairchild Semiconductor Corporation-related inventors


Hybrid gate dielectrics for semiconductor power devices

In a general aspect, a power semiconductor device can include a silicon carbide (sic) substrate and a sic epitaxial layer disposed on the sic substrate. The device can include a well region disposed in the epitaxial layer, a source region disposed in the well region and a gate trench disposed in the epitaxial layer and adjacent to the source region. ... Fairchild Semiconductor Corporation

Packaged semiconductor devices with laser grooved wettable flank and methods of manufacture

In a general aspect, a method for producing a packaged semiconductor device can include coupling a semiconductor device to a leadframe structure having a signal lead that is electrically coupled with the semiconductor device. The method can also include encapsulating at least a portion of the semiconductor device and at least a portion of the leadframe structure in a molding compound. ... Fairchild Semiconductor Corporation

Intelligent contact charging devices and methods

In a general aspect, a charging apparatus can include a power converter circuit configured to supply, from an input voltage, charging power for charging a battery of an electronic device; and a control circuit configured to determine a charging current limit and a charging voltage of the power converter circuit for charging the battery. Determining the charging current limit and the charging voltage can include: setting the current limit of the power converter circuit to an initial charging current limit and setting the charging voltage to an initial charging voltage; determining whether the power converter circuit is operating in a current limit mode or a voltage limit mode; and iteratively modifying the current limit of the power converter circuit until the power converter circuit dithers between the current limit mode and the voltage limit mode.. ... Fairchild Semiconductor Corporation

Silicon-carbide trench gate mosfets and methods of manufacture

In a general aspect, an apparatus can include a semiconductor substrate, a drift region disposed in the semiconductor substrate; a body region disposed in the drift region and a source region disposed in the body region. The apparatus can also include a gate trench disposed in the semiconductor substrate. ... Fairchild Semiconductor Corporation

Self identification and pollution detection in usb type-c

A paddle board includes an electronic marker circuit configured to indicate at least one capability of a cable assembly to a device coupled to the cable assembly and to select the device as one of a source or a sink, the paddle board being powered by the device, a register configured to store at least one variable value associated with at least one of the cable assembly and the paddle board, and a temperature sensor configured to sense a temperature of the paddle board and configured to store a value indicating the sensed temperature in the register.. . ... Fairchild Semiconductor Corporation

Low-voltage, high-current charging with over-voltage sensing

A power converter includes a load detector a processor and a power control block. The load detector is configured to determine a change in a load value of an electronic device coupled to the power converter without receiving a message communicated from the electronic device indicating the change in the load value, and determine if the change in the load value exceeds a threshold value. ... Fairchild Semiconductor Corporation

Reduction of electrical size of bulk capacitors in mobile power supplies

A capacitor input circuit for a mobile power supply includes a bulk capacitor and a switch. The switch connects the bulk capacitor to receive a rectified ac voltage from a rectifier when an ac line voltage input to the mobile power supply is lower than a threshold voltage. ... Fairchild Semiconductor Corporation

Balancer for multiple field effect transistors arranged in a parallel configuration

In at least one general aspect, an apparatus can include a first field effect transistor (fet) device and a second fet device. The apparatus can include a characterization circuit coupled to the first fet device and the second fet device where the characterization circuit can be configured to characterize a responsiveness of each of the first fet device and the second fet device. ... Fairchild Semiconductor Corporation

Clamp voltage detection and over-voltage protection for power supply topologies

An active clamp flyback controller includes first and second input terminals, a clamp voltage detection circuit, and an overvoltage protection circuit. The first input terminal is adapted to be coupled to a terminal of a clamp capacitor. ... Fairchild Semiconductor Corporation

Vertical and horizontal circuit assemblies

In a general aspect, an apparatus can include a leadframe including a plurality of leads configured to be coupled with a printed circuit board. The plurality of leads can be disposed along a single edge of the apparatus. ... Fairchild Semiconductor Corporation

Resonant ignition circuit

In a general aspect, an ignition circuit can include a control circuit configured to receive a command signal from an engine control unit, and a driving circuit coupled with the control circuit. The driving circuit can be configured to be coupled with a resonant circuit that includes a primary winding of an ignition coil. ... Fairchild Semiconductor Corporation

Differential level shift circuit

In a general aspect, a circuit can include a comparison stage including a plurality of transistors and a current mirror stage including a current mirror. The comparison stage can be configured to produce a cancelling signal before a main signal is produced by the current mirror stage.. ... Fairchild Semiconductor Corporation

High contact resistance detection

A device includes an interface configured to couple a power source to the device. The interface includes a plurality of contacts including at least one first contact configured to couple a voltage bus of the power source to a voltage bus of the device, and at least one second contact configured to couple the voltage bus of the power source to a secondary bus of the device. ... Fairchild Semiconductor Corporation

Usb type-c to legacy usb cable detection

A port controller includes an advertise block configured to determine a cable assembly coupled to the port controller is not compliant with a standard used by the port controller, a comparator configured to determine a current drawn from a power converter coupled to the cable assembly exceeds a capability of the power converter based on comparing a bus voltage to a threshold voltage, and a protection block configured to, in response to determining the current drawn from the power converter exceeds the capability of the power converter, cause the current drawn from the power converter to be reduced.. . ... Fairchild Semiconductor Corporation

03/01/18 / #20180058414

Multiple pulse ignition system control

In a general aspect, an ignition circuit can include a control circuit that is coupled with an engine control unit (ecu) to receive a command signal from the ecu. The control circuit can include a multi-pulse generator configured to, in response to the command signal, generate a multi-pulse drive signal. ... Fairchild Semiconductor Corporation

02/22/18 / #20180054113

Power factor correction circuit and method

A power factor correction (pfc) circuit comprises an oscillator circuit. The oscillator circuit receives a valley detect signal indicating a zero current condition, determines a blanking time according to an operational cycle of the pfc circuit, and determines to initiate the operational cycle according to the valley detect signal and the blanking time. ... Fairchild Semiconductor Corporation

02/15/18 / #20180048241

Adaptive turn-off trigger blanking for synchronous rectification

A switching converter includes a synchronous rectifier and a synchronous rectifier driver that controls conduction of the synchronous rectifier. The synchronous rectifier driver turns off the synchronous rectifier in response to a turn-off trigger. ... Fairchild Semiconductor Corporation

02/01/18 / #20180031647

Magnetic sensor utilizing magnetization reset for sense axis selection

In one general aspect, a system includes a material including a surface, and a magnetic sensor configured to sense a first component and a second component of a magnetic field. The first component of the magnetic field may be orthogonal to the second component of the magnetic field. ... Fairchild Semiconductor Corporation

01/11/18 / #20180012958

Trench-based power semiconductor devices with increased breakdown voltage characteristics

Exemplary power semiconductor devices with features providing increased breakdown voltage and other benefits are disclosed.. . ... Fairchild Semiconductor Corporation

12/28/17 / #20170373008

Isolation between semiconductor components

In some general aspects, an apparatus may include a first semiconductor die, a second semiconductor die, and a capacitive isolation circuit being coupled to the first semiconductor die and the second semiconductor die. The capacitive isolation circuit may be disposed outside of the first semiconductor die and the second semiconductor die. ... Fairchild Semiconductor Corporation

12/21/17 / #20170366044

Power supply circuit with secondary side to primary side communication

An electrical circuit for a power supply includes a primary-side controller integrated circuit (ic) that outputs a drive signal on a switch pin to control a switching operation of a switch that is coupled to a primary winding of a transformer. The primary-side controller ic places the switch pin at high impedance during a sense window and turns on the switch in response to sensing a dynamic detection signal on the switch pin during the sense window. ... Fairchild Semiconductor Corporation

12/21/17 / #20170365583

Semiconductor package and related methods

Implementations of semiconductor packages may include: a first substrate having a first dielectric layer coupled between a first metal layer and a second metal layer; a second substrate having a second dielectric layer coupled between a third metal layer and a fourth metal layer. A first die may be coupled with a first electrical spacer coupled in a space between and coupled with the first substrate and the second substrate and a second die may be coupled with a second electrical spacer coupled in a space between and coupled with the first substrate and the second substrate.. ... Fairchild Semiconductor Corporation

12/07/17 / #20170350768

Differential thermistor circuit

In a general aspect, a circuit can include a first resistor configured to be coupled to a first terminal of a temperature-sensitive resistance, a second resistor configured to be coupled to a second terminal of the temperature-sensitive resistance and a temperature information circuit. The temperature information circuit can be configured to: receive a first voltage from the first terminal of the temperature-sensitive resistance; receive a second voltage from the second terminal of the temperature-sensitive resistance; and provide temperature information based on the first voltage and the second voltage. ... Fairchild Semiconductor Corporation

11/30/17 / #20170346385

Inductor current emulation for output current monitoring

A switch mode power supply controller includes a switch terminal adapted to be coupled to an inductor that drives a load, high- and low-side switches a pulse width modulation (pwm) circuit, and a current monitor circuit. The pwm circuit is coupled to a feedback terminal for receiving a feedback signal, and alternatively drives the high-side switch and the low-side switch with a duty cycle set using the feedback signal to regulate an output voltage to a desired level in a work mode, and keeps both the high-side switch and the low-side switch non-conductive in a non-work mode. ... Fairchild Semiconductor Corporation

11/30/17 / #20170346328

Bypass charging circuit and method

In accordance with an embodiment, a bypass charging circuit includes a pair of transistors having current carrying terminals commonly connected to form a node. An input of a comparator is coupled to the node through a switch and to a resistor. ... Fairchild Semiconductor Corporation

11/30/17 / #20170345889

Avalanche-rugged silicon carbide (sic) power device

In at least one general aspect, a silicon carbide (sic) device can include a drift region and a termination region at least partially surrounding the sic device. The termination region can have a first transition zone and a second transition zone. ... Fairchild Semiconductor Corporation

11/23/17 / #20170338807

Ramp generator for wide frequency range pulse width modulator controller or the like

A ramp generator includes a current generator, a current mirror, and a first capacitor. The current generator has an input for receiving a clock signal, and an output for providing a current proportional to a frequency of the clock signal using a first transistor having first and second current electrodes and a control electrode, an amplifier that establishes a reference voltage on the second current electrode of the first transistor, and a variable resistor coupled between the second current electrode of the second transistor and ground whose resistance is set according to the frequency of the clock signal. ... Fairchild Semiconductor Corporation

10/05/17 / #20170288048

Silicon carbide (sic) device with improved gate dielectric shielding

In one general aspect, an apparatus can include a silicon carbide (sic) device can include a gate dielectric, a first doped region having a first conductivity type, a source, a body region of the first conductivity type, and a second doped region having a second conductivity type. The second doped region can have a first portion and a second portion. ... Fairchild Semiconductor Corporation

08/24/17 / #20170244333

Gate pre-positioning for fast turn-off of synchronous rectifier

A synchronous rectifier driver pre-positions a gate of a synchronous rectifier to allow for fast turn-off. The synchronous rectifier driver turns on the synchronous rectifier by driving the gate at a high level for a period of time that is based on a previous conduction time of the synchronous rectifier. ... Fairchild Semiconductor Corporation

08/17/17 / #20170235351

Apparatus and method for restarting an electronic device

This document discusses, among other things, apparatus and methods for restarting an electronic device configured to receive power from a main power supply and an auxiliary power supply. The electronic device includes a reset circuit a reset circuit configured to provide a first signal indicative of an electronic device failure, and an isolation circuit configured to isolate the main power supply from the auxiliary power supply in response to the first signal so that power is supplied to the reset circuit by the auxiliary power supply. ... Fairchild Semiconductor Corporation

08/03/17 / #20170222569

Self-tuning adaptive dead time control for continuous conduction mode and discontinuous conduction mode operation of a flyback converter

A flyback converter includes a primary-side switch that controls conduction of current on a primary side of a transformer and a synchronous rectifier on a secondary side of the transformer. A synchronous rectifier driver controls the conduction of the synchronous rectifier by adaptively adjusting a turn-off threshold of the synchronous rectifier.. ... Fairchild Semiconductor Corporation

08/03/17 / #20170222568

Adaptive turn-off trigger blanking for synchronous rectification

A switching converter includes a synchronous rectifier and a synchronous rectifier driver that controls conduction of the synchronous rectifier. The synchronous rectifier driver turns off the synchronous rectifier in response to a turn-off trigger. ... Fairchild Semiconductor Corporation

08/03/17 / #20170222557

Load capacitance determination circuitry and power supply control

Generally, this disclosure provides circuitry and methods for determining the output capacitance of an output load capacitor of a power supply. The output capacitance is generally determined by beginning a calibration period and charging an output capacitor with a current source to generate an output voltage. ... Fairchild Semiconductor Corporation

07/13/17 / #20170201843

Enable and disable comparator voltage reference

This document discusses, among other things, systems and methods to reduce power use of an accessory detection device. The accessory detection device can be configured to be coupled to a mobile device having an audio jack configured to be coupled to a mobile device accessory having a send/end key. ... Fairchild Semiconductor Corporation

07/13/17 / #20170201109

Battery charge termination voltage reduction

This document discusses, among other things, apparatus, systems, and methods to prevent a voltage of a charging battery from exceeding a voltage threshold, including receiving charging information from a battery and controlling an output current of a travel adapter, including adjusting the received battery current information using a load current to prevent the voltage of the battery from exceeding a voltage threshold, and providing output current limit information to the travel adapter using the adjusted battery current information.. . ... Fairchild Semiconductor Corporation

07/06/17 / #20170194803

Usb type-c connector for improved charge efficiency

Techniques for charging an electronic device using a universal serial bus (usb) cable and connector are provided. In an example, an apparatus can include a charger, a usb cable coupled to the charger at a first end of the cable, a paddle card for a usb connector coupled to the cable at a second end of the cable, the paddle card including differential data contacts, and wherein the differential data contacts of the paddle card are shorted together at the paddle card.. ... Fairchild Semiconductor Corporation

03/02/17 / #20170064479

Mic/gnd detection and automatic switch

This document discusses, among other things, an audio jack detection switch configured to be coupled to first and second gnd/mic terminals of an audio jack, wherein the audio jack detection switch includes a detection circuit configured to measure an impedance on the first and second gnd/mic terminals and identify each gnd/mic terminal as either a gnd pole or a mic pole using the measured impedance, and wherein the audio jack detection switch includes a switch configured to automatically couple an identified mic pole to a mic connection and to automatically couple an identified gnd pole to a gnd connection using information from the detection circuit.. . ... Fairchild Semiconductor Corporation

03/02/17 / #20170063225

Input ac line control for ac-dc converters

An ac-dc converter includes a main switch that is controlled according to an input ac line voltage. The main switch is allowed to be switched when a level of the input ac line voltage is within a regulation band, and is prevented from being switched when the level of the input ac line voltage is not within the regulation band. ... Fairchild Semiconductor Corporation

01/26/17 / #20170025847

Ground fault circuit interrupter (gfci) monitor

This document discusses, among other things, a self-test (st) ground fault circuit interrupter (gfci) monitor configured to generate a simulated ground fault starting in a first half-cycle of a first cycle of ac power and extending into a second half-cycle of the first cycle of ac power, wherein the first half-cycle of the first cycle of ac power precedes the second half-cycle of the first cycle of ac power. Further, the st gfci monitor can detect a response to the simulated ground fault.. ... Fairchild Semiconductor Corporation

01/12/17 / #20170012545

Adaptive clamping circuitry

The present disclosure provides a dc/dc power supply system that includes a primary side and a secondary side to generate an output dc voltage from an input dc voltage. The power supply also includes adaptive clamping circuitry configured to generate an adjustable clamping voltage and/or current to limit a vds breakdown voltage for a plurality of switches of the secondary side.. ... Fairchild Semiconductor Corporation

01/12/17 / #20170012119

Silicon-carbide trench gate mosfets

In a general aspect, an apparatus can include a silicon carbide (sic) trench gate mosfet with improved operation due, at least in part, to a reduced gate capacitance. In the sic trench gate mosfet, a thick gate oxide can be formed on a bottom surface of the gate trench and a built-in channel, having a vertical portion and a lateral portion, can be formed to electrically connect a vertical inversion-layer channel, such as in a channel stopper layer, to a vertical jfet channel region and a drift region.. ... Fairchild Semiconductor Corporation

01/12/17 / #20170012099

Methods and apparatus related to termination regions of a semiconductor device

In one general aspect, an apparatus can include a semiconductor region having an active region, and an end trench defined within a termination region of the semiconductor region where the end trench has a curved shape.. . ... Fairchild Semiconductor Corporation

01/05/17 / #20170005583

Control of a startup circuit using a feedback pin of a pwm controller integrated circuit chip

A power supply includes a control transistor that controls a primary winding of a transformer to induce current on a secondary winding of the transformer to generate an output voltage. A pulse width modulation (pwm) controller integrated circuit (ic) chip drives the control transistor through a gate pin. ... Fairchild Semiconductor Corporation








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