RICHTEK TECHNOLOGY CORPORATION
850Patents
791Active
850Granted
65Portfolio score
Filing activity: Jan 22, 2002 → Jun 7, 2024 · 202 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7202653B2 | High efficiency power converter | Electricity | 1,453 | Expired |
| US9225196B2 | Rectifying-and-modulating circuit and wireless power receiver incorporating the same | Electricity | 270 | Active |
| US7411316B2 | Dual-input power converter and control methods thereof | Electricity | 94 | Expired |
| US8258714B2 | LED controller with phase-shift dimming function and LED phase-shift dimming circuit and method thereof | Emerging Cross-Sectional Technologies | 56 | Active |
| US8446135B2 | Control circuit and method for a ripple regulator system | Electricity | 50 | Active |
| US7230406B2 | Fixed-frequency current mode converter and control method thereof | Electricity | 49 | Expired |
| US8288967B2 | LED control circuit and method | Emerging Cross-Sectional Technologies | 47 | Active |
| US6670794B1 | Multi-phase DC-to-DC buck converter with multi-phase current balance and adjustable load regulation | Electricity | 47 | Expired |
| US7701305B2 | Frequency jittering control for varying the switching frequency of a power supply | Electricity | 42 | Active |
| US7501805B2 | Circuit and method for soft start from a residual voltage | Emerging Cross-Sectional Technologies | 39 | Active |
| US8358113B2 | Current balance in a multi-phase power converter with constant on-time control | Electricity | 37 | Active |
| US9781786B2 | Control circuit and method of a LED driver | Electricity | 33 | Active |
| US6414470B1 | Apparatus and method for balancing channel currents in a multi-phase DC-to-DC converter | Electricity | 32 | Expired |
| US6839252B2 | Two-step ripple-free multi-phase buck converter and method thereof | Electricity | 32 | Expired |
| US7834606B2 | Control circuit and method for a constant on-time PWM switching converter | Emerging Cross-Sectional Technologies | 31 | Active |
| US8803492B2 | Cross-interference reduction of a buck power converter | Emerging Cross-Sectional Technologies | 30 | Active |
| US7233191B2 | JFET driver circuit and JFET driving method | Electricity | 28 | Expired |
| US6703885B1 | Trimmer method and device for circuits | Physics | 27 | Expired |
| US7122971B2 | Driver circuit for driving a plurality of DC lamp strings | Electricity | 26 | Expired |
| US7233131B2 | Circuit and method for implementing a multi-function pin on a PWM controller chip in a voltage converter | Electricity | 25 | Expired |
| US8193853B2 | Efficiency and thermal improvement of a charge pump by mixing different input voltages | Electricity | 25 | Active |
| US7906939B2 | Soft-stop circuit and method for a voltage regulator | Electricity | 24 | Active |
| US7132717B2 | Power metal oxide semiconductor transistor layout with lower output resistance and high current limit | Electricity | 23 | Expired |
| US6930474B2 | Current sense apparatus and method using a combination of a simulation and a real sense for a switching mode power converter | Emerging Cross-Sectional Technologies | 22 | Expired |
| US9853486B2 | Resonant wireless power receiver circuit and control method thereof | Electricity | 21 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.