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Fairchild Semiconductor Corporation
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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


 new patent  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

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... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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. The first transition zone can be disposed between a... Fairchild Semiconductor Corporation

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. Another input terminal of the comparator is coupled for... Fairchild Semiconductor Corporation

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,... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

Semiconductor device and method therefor

In one embodiment, a power supply controller, or alternately a semiconductor device having a power supply controller, may have a circuit configured configuring the PWM circuit to form a first signal having a value formed to be representative of a peak value of a primary current through the power switch... Fairchild Semiconductor Corporation

Semiconductor device and method therefor

In one embodiment, a power supply controller, or alternately a semiconductor device having a power supply controller, may have a first circuit configured to form a sense signal that is representative of a signal from an auxiliary winding of a transformer. A feedback circuit may be configured to allow the... Fairchild Semiconductor Corporation

Methods and apparatus related to protection of a speaker

In one general aspect, a method can include calculating, at a calibration temperature of a speaker, a calibration parameter through a coil of the speaker in response to a first test signal, and can include sending a second test signal through the coil of the speaker. The method can also... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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

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. The output voltage may... Fairchild Semiconductor Corporation

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. The synchronous rectifier driver prevents the turn-off trigger from turning OFF the synchronous rectifier during a... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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. In... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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

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... Fairchild Semiconductor Corporation

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... Fairchild Semiconductor Corporation

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. The PWM... Fairchild Semiconductor Corporation








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