Assignee
LEADTREND TECH CORP
TW·157 granted patents·32 pending applications·583 citations·filing 2004–2025
Top patents by PatentIndex Score
189 records- 0197US7193453B2Dual loop voltage regulation circuit of power supply chipLEADTREND TECH CORP·Filed 2005·Granted Mar 20, 2007·140 cites·15 claims
- 0296US9755421B2Control circuit applied to a power converter and operation method thereofLEADTREND TECH CORP·Filed 2015·Granted Sep 5, 2017·12 cites·33 claims
- 0394US9048723B2Active feedback control integrated circuit applied to an alternating current/direct current converter and operation method thereofLEADTREND TECH CORP·Filed 2013·Granted Jun 2, 2015·20 cites·22 claims
- 0493US7109562B2High voltage laterally double-diffused metal oxide semiconductorLEADTREND TECH CORP·Filed 2005·Granted Sep 19, 2006·34 cites·12 claims
- 0590US10691189B2Line-voltage detection method, power controller and power supply with brown-out protection and brown-in mechanismLEADTREND TECH CORP·Filed 2017·Granted Jun 23, 2020·4 cites·20 claims
- 0687US10742124B2Active clamp flyback converter capable of switching operation modesLEADTREND TECH CORP·Filed 2019·Granted Aug 11, 2020·5 cites·19 claims
- 0787US7772782B2Light emitting diode (LED) driving deviceLEADTREND TECH CORP·Filed 2007·Granted Aug 10, 2010·21 cites·14 claims
- 0886US11417651B2Power supplies and semiconductor apparatuses with functions of current-sampling and high-voltage startupLEADTREND TECH CORP·Filed 2020·Granted Aug 16, 2022·3 cites·11 claims
- 0986US7576620B2Pseudo random clock generatorLEADTREND TECH CORP·Filed 2007·Granted Aug 18, 2009·11 cites·15 claims
- 1086US7480159B2Switching-mode power converter and pulse-width-modulation control circuit with primary-side feedback controlLEADTREND TECH CORP·Filed 2007·Granted Jan 20, 2009·26 cites·14 claims
- 1185US7898823B2Quasi-resonant fly-back converter without auxiliary windingLEADTREND TECH CORP·Filed 2007·Granted Mar 1, 2011·34 cites·9 claims
- 1282US8766670B2Sample-and-hold circuit for generating a variable sample delay time of a transformer and method thereofLEADTREND TECH CORP·Filed 2013·Granted Jul 1, 2014·6 cites·13 claims
- 1382US7541750B2DC to DC converter with load open detection and related method thereofLEADTREND TECH CORP·Filed 2007·Granted Jun 2, 2009·10 cites·15 claims
- 1481US7978487B2Switching power supply and over-temperature protection methodLEADTREND TECH CORP·Filed 2009·Granted Jul 12, 2011·10 cites·13 claims
- 1579US10056823B2Protection circuit applied to an alternating current power source and related protection method thereofLEADTREND TECH CORP·Filed 2016·Granted Aug 21, 2018·4 cites·20 claims
- 1679US7358821B2Digital frequency jittering apparatus with random data generator and method thereofLEADTREND TECH CORP·Filed 2006·Granted Apr 15, 2008·11 cites·16 claims
- 1777US10666153B2Active clamp flyback converters and control methods thereofLEADTREND TECH CORP·Filed 2019·Granted May 26, 2020·2 cites·16 claims
- 1877US9301364B2Drivers and driving methods for a LED string, capable of providing LED short protection or avoiding LED flickeringLEADTREND TECH CORP·Filed 2013·Granted Mar 29, 2016·3 cites·17 claims
- 1977US9282608B2Dimming driving system and dimming controllerLEADTREND TECH CORP·Filed 2012·Granted Mar 8, 2016·4 cites·19 claims
- 2077US8049571B2Frequency-jittering apparatuses, frequency-jittering methods and power management devicesLEADTREND TECH CORP·Filed 2009·Granted Nov 1, 2011·7 cites·13 claims
- 2176US10397997B2Dimming controllers and dimming methods capable of receiving PWM dimming signal and DC dimming signalLEADTREND TECH CORP·Filed 2018·Granted Aug 27, 2019·2 cites·15 claims
- 2276US7495286B2High-voltage semiconductor device structureLEADTREND TECH CORP·Filed 2006·Granted Feb 24, 2009·7 cites·11 claims
- 2376US2023396177A1Controller applied to an inductor-inductor-capacitor resonant converterLEADTREND TECH CORP·Filed 2023·Application pending·0 cites
- 2474US9577515B2Controller for generating jitters in a quasi resonant mode and method for generating jitters in a quasi resonant modeLEADTREND TECH CORP·Filed 2014·Granted Feb 21, 2017·4 cites·18 claims
- 2574US9564814B2Controller for adjusting an output voltage of a power converter and related method thereofLEADTREND TECH CORP·Filed 2014·Granted Feb 7, 2017·4 cites·6 claims
- 2674US9318950B2Control circuit for reducing touch current of a power converter and operation method thereofLEADTREND TECH CORP·Filed 2014·Granted Apr 19, 2016·5 cites·16 claims
- 2773US10361636B2Synchronous rectifier applied to a power converter and operation method thereofLEADTREND TECH CORP·Filed 2018·Granted Jul 23, 2019·2 cites·8 claims
- 2873US9974124B2LED controllers for dimming at least one LED stringLEADTREND TECH CORP·Filed 2014·Granted May 15, 2018·3 cites·18 claims
- 2973US7057380B2Adaptive dead-time controllerLEADTREND TECH CORP·Filed 2004·Granted Jun 6, 2006·35 cites·17 claims
- 3072US9973100B2Synchronous rectifier applied to a power converter and operation method thereofLEADTREND TECH CORP·Filed 2017·Granted May 15, 2018·2 cites·8 claims
- 3172US9917523B1Control methods and switching mode power supplies with improved dynamic response and reduced switching lossLEADTREND TECH CORP·Filed 2017·Granted Mar 13, 2018·2 cites·18 claims
- 3272US9613572B2Controller and method for dimming light-emitting diodesLEADTREND TECH CORP·Filed 2015·Granted Apr 4, 2017·2 cites·12 claims
- 3372US9350237B2Control circuit applicable to power converter and operation method thereofLEADTREND TECH CORP·Filed 2014·Granted May 24, 2016·3 cites·16 claims
- 3472US9101033B2Short protection control circuits and related control methodsLEADTREND TECH CORP·Filed 2012·Granted Aug 4, 2015·3 cites·14 claims
- 3572US7649757B2Leakage-inductance energy recycling circuit and flyback converter with leakage-inductance energy recycling circuitLEADTREND TECH CORP·Filed 2007·Granted Jan 19, 2010·10 cites·18 claims
- 3672US7378824B2Voltage converter capable of avoiding voltage drop occurring in input signalLEADTREND TECH CORP·Filed 2006·Granted May 27, 2008·6 cites·34 claims
- 3771US10319713B2Semiconductor devices with electrostatic discharge robustnessLEADTREND TECH CORP·Filed 2018·Granted Jun 11, 2019·2 cites·14 claims
- 3871US10193456B2Pulse width modulation controller and relevant control method having minimum on time in response to voltage peak of line voltageLEADTREND TECH CORP·Filed 2017·Granted Jan 29, 2019·2 cites·15 claims
- 3971US9673720B2Synchronous rectification controller and relative dead-time control methodLEADTREND TECH CORP·Filed 2015·Granted Jun 6, 2017·2 cites·11 claims
- 4071US7642733B2Driving circuit for light emitting device with compensation mechanism and driving method thereofLEADTREND TECH CORP·Filed 2008·Granted Jan 5, 2010·4 cites·12 claims
- 4171US7619909B2Control circuit for adjusting leading edge blanking time and power converting system using the same control circuitLEADTREND TECH CORP·Filed 2007·Granted Nov 17, 2009·9 cites·10 claims
- 4271US7330361B1Capacitor charging moduleLEADTREND TECH CORP·Filed 2006·Granted Feb 12, 2008·10 cites·10 claims
- 4370US12224669B2Flyback power converter and secondary-side control method thereofLEADTREND TECH CORP·Filed 2023·Granted Feb 11, 2025·0 cites·22 claims
- 4470US9774267B2Power supplies and control methods suitable for sequentially transmitting command bits from secondary side to primary sideLEADTREND TECH CORP·Filed 2016·Granted Sep 26, 2017·2 cites·26 claims
- 4570US9077249B2Power controller and power management control methodLEADTREND TECH CORP·Filed 2012·Granted Jul 7, 2015·3 cites·14 claims
- 4670US7821750B2Voltage converter for preventing switch device from being damaged by voltage spike by utilizing protection circuitLEADTREND TECH CORP·Filed 2006·Granted Oct 26, 2010·6 cites·8 claims
- 4769US12418241B2Primary controller applied to a primary side of a power converter and operation method thereofLEADTREND TECH CORP·Filed 2023·Granted Sep 16, 2025·0 cites·10 claims
- 4869US12047008B2Flyback power converters and control methods thereofLEADTREND TECH CORP·Filed 2022·Granted Jul 23, 2024·0 cites·14 claims
- 4969US9584030B2Controller for eliminating acoustic noise of a power converter and related method thereofLEADTREND TECH CORP·Filed 2015·Granted Feb 28, 2017·2 cites·10 claims
- 5069US9006985B2Light emitting diode driving integrated circuit with a multi-step current setting function and method of setting a multi-step current of a light emitting diode driving integrated circuitLEADTREND TECH CORP·Filed 2012·Granted Apr 14, 2015·2 cites·11 claims
Showing the top 50 of 189 patent records by PatentIndex Score.
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