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Leadtrend Technology Corp patents


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

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "L" | Leadtrend Technology Corp-related inventors


Semiconductor devices with electrostatic discharge robustness

An embodiment provides a semiconductor device integrated with a switch device and an esd protection device, having electrostatic discharge robustness. Formed on a semiconductor substrate of a first type is a drain region of a second type opposite to the first type. ... Leadtrend Technology Corp

Power metal-oxide-semiconductor field-effect transistor device with three-dimensional super junction and fabrication method thereof

A power metal-oxide-semiconductor field-effect transistor (mosfet) device includes a first metal layer, a substrate, an epitaxy layer, a plurality of first trench wells, a plurality of second trench wells, a plurality of body structure layers, a plurality of polysilicon layers, and a second metal layer. A part of a depletion region is formed between each first trench well and the epitaxy layer and between a body structure layer corresponding to the each first trench well and the epitaxy layer, and a rest part of the depletion region is formed between a second trench well corresponding to the each first trench well and the epitaxy layer. ... Leadtrend Technology Corp

Multiple output rectifier and operation method thereof

A multiple output rectifier includes a comparator-based active rectification circuit and a controller, wherein the controller is coupled to the comparator-based active rectification circuit. The comparator-based active rectification circuit is used for generating and outputting each output voltage of a plurality of output voltages according to an input voltage, the each output voltage, and a control signal corresponding to the each output voltage. ... Leadtrend Technology Corp

High-voltage metal-oxide-semiconductor transistor capable of preventing occurrence of exceedingly-large reverse current

An embodiment of the invention shows a high-voltage mos field-effect transistor connected in series with a schottky diode. When the schottky diode is forwardly biased, the high-voltage mosfet can act as a switch and sustain a high drain-to-source voltage. ... Leadtrend Technology Corp

Vertical double diffusion metal-oxide-semiconductor power device with high voltage start-up unit

A vertical double diffusion metal-oxide-semiconductor power device with high voltage start-up unit includes a vertical double diffusion metal-oxide-semiconductor power transistor and the high voltage start-up unit. The vertical double diffusion metal-oxide-semiconductor power transistor includes a first metal layer, a substrate layer with first conductivity type, an epitaxy layer with first conductivity type, a second metal layer, and a plurality of polysilicon layers. ... Leadtrend Technology Corp

Vertical double diffusion metal-oxide-semiconductor power device

A vertical double diffusion metal-oxide-semiconductor power device with thermal sensitivity unit includes a vertical double diffusion metal-oxide-semiconductor power transistor and at least one thermal sensitivity unit. The vertical double diffusion metal-oxide-semiconductor power transistor includes a first metal layer, a substrate layer, an epitaxy layer, a second metal layer, and a plurality of first polysilicon layers, wherein each first polysilicon layer of the plurality of first polysilicon layers corresponds to a first oxide layer, a first doping well and a second doping well with second conductivity type, a first doped region and a second doped region with first conductivity type, and a second oxide layer. ... Leadtrend Technology Corp

Line-voltage detection method, power controller and power supply with brown-out protection and brown-in mechanism

A power controller makes use of a line-voltage detection method to perform brown-out protection and brown-in mechanism. The power controller has a high-voltage node connected via a current-limiting resistor to a line voltage, and a high-voltage startup transistor connected to the high-voltage node. ... Leadtrend Technology Corp

Control methods and switching mode power supplies with improved dynamic response and reduced switching loss

A control method is used in a switching mode power supply to improve dynamic load response and switching loss. A pwm signal is provided to control a power switch and has a switching frequency. ... Leadtrend Technology Corp

Pulse width modulation controller and relevant control method having minimum on time in response to voltage peak of line voltage

A pwm controller in a switching mode power supply provides to a power switch a pwm signal determining an on time and an off time. A peak detector detects a voltage peak of a line voltage generated by rectifying an alternating-current input voltage. ... Leadtrend Technology Corp

Switching-mode power supplies capable of operating at valley switching, and relevant control methods

Control methods and related power controllers diminish audible noise in a power supply capable of performing valley switching. The power supply has an inductive device and a power switch. ... Leadtrend Technology Corp

Synchronous rectifier applied to a power converter and operation method thereof

A synchronous rectifier applied to a power converter includes a power supply module, a control module, and a gate driving unit. The power supply module is used for generating a supply current according to an induced voltage generated from a secondary side of the power converter, wherein the supply current is used for establishing a supply voltage, and the induced voltage corresponds to a control signal of a power switch of a primary side of the power converter. ... Leadtrend Technology Corp

Multi-mode controller applied to a power converter and operation method thereof

A multi-mode controller applied to a power converter includes a detection range generation module and a gate signal generation unit. The detection range generation module is used for generating a comparison voltage according to a reference current, and generating a detection signal according to the comparison voltage and a first reference voltage. ... Leadtrend Technology Corp

Switching mode power supplies with fast load-transient response

A power supply detects a falling rate of an output voltage for fast load-transient response. The power supply with a primary side and a secondary side isolated from each other comprises a primary-side control circuit and a secondary-side control circuit. ... Leadtrend Technology Corp

Method for controlling a dead time of a secondary side of a power converter

A method for controlling a dead time of a secondary side of a power converter includes giving a previous first turning-on time and a current first turning-on time corresponding to a primary side of the power converter, generating a first voltage and a second voltage according to the previous first turning-on time and the current first turning-on time, respectively, generating a current first target voltage according to the first voltage, the second voltage, and an ideal voltage corresponding to a previous ideal second turning-on time of the secondary side, and determining a current second turning-on time of the secondary side according to the current first target voltage and a first ramp voltage corresponding to a current ideal second turning-on time of the secondary side. A difference between the current second turning-on time and the current ideal second turning-on time is a current dead time.. ... Leadtrend Technology Corp

05/04/17 / #20170126132

Power control method and related apparatus capable of providing compensation to inductance variation

A power supply control method capable of compensating inductance variation of an inductive device in a power supply. The power supply has a power switch controlling a winding current through the inductive device, and converts an input voltage into an output voltage. ... Leadtrend Technology Corp

03/16/17 / #20170077820

Sample-and-hold circuit for generating a variable sample signal of a power converter and method thereof

A sample-and-hold circuit includes a first voltage generation unit, a second voltage generation unit, a stabilization capacitor. The first voltage generation unit generates a first voltage according to a first predetermined delay time and a voltage corresponding to an auxiliary winding of a power converter. ... Leadtrend Technology Corp

03/09/17 / #20170070153

Controller for increasing efficiency of a power converter and a related method thereof

A controller for increasing efficiency of a power converter includes a comparison module and a gate signal generation unit. The comparison module is used for generating a detection voltage according to a direct current (dc) input voltage of a primary side of the power converter, and comparing the detection voltage with a predetermined value to generate a comparison result. ... Leadtrend Technology Corp

03/09/17 / #20170070151

Synchronous rectifier applied to a power converter and operation method thereof

A synchronous rectifier applied to a power converter includes a gate coupling effect suppressing unit. The gate coupling effect suppressing unit is used for suppressing an induced voltage coupled to a gate of a metal-oxide-semiconductor transistor coupled to a secondary side of the power converter to ensure that the metal-oxide-semiconductor transistor is turned off when the power converter operates in a start-up condition and a power switch of the power converter is turned on. ... Leadtrend Technology Corp

03/09/17 / #20170070143

Ripple suppressor

A ripple suppressor suppresses ripples of a channel current. The ripple suppressor comprises a voltage-controlled current source, a stabilizer, and an auto-calibration circuit. ... Leadtrend Technology Corp








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