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Leadtrend Technology Corporation patents

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

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

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. The input voltage at the high-voltage node... Leadtrend Technology Corporation

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. A cross voltage of a transformer in the switching mode power supply is detected to provide... Leadtrend Technology Corporation

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. An OFF-time control unit controls the PWM... Leadtrend Technology Corporation

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. When the power switch is OFF, a winding voltage of the inductive device oscillates to provide an oscillation signal with at... Leadtrend Technology Corporation

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. The primary-side control circuit controls a power switch to convert... Leadtrend Technology Corporation

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. A sampling time is provided within an ON... Leadtrend Technology Corporation

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. A control voltage at a control node controls the channel current flowing through a path connecting first and second channel nodes. The voltage-controlled current source receives a... Leadtrend Technology Corporation

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009


This listing is an abstract for educational and research purposes is only meant as a recent sample of applications filed, not a comprehensive history. is not affiliated or associated with Leadtrend Technology Corporation in any way and there may be associated servicemarks. This data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Leadtrend Technology Corporation with additional patents listed. Browse our Agent directory for other possible listings. Page by