Switching regulator and the method of generating a peak current signal for the switching regulator
Granted: January 27, 2015
Patent Number:
8941367
A switching regulator including: a power stage having a first power switch and a second power switch coupled in series; a filter circuit having an inductor and an output capacitor; a feedback circuit configured to provide a feedback signal indicating an output voltage of the regulator; and a control circuit configured to provide a switching signal to control the ON and OFF of the first power switch so as to regulate the energy supplied to a load; wherein the control circuit has a peak…
Reference compensation module and switching regulator circuit comprising the same
Granted: January 6, 2015
Patent Number:
8928305
A switching regulator circuit and a reference compensation module employed for compensating a reference signal in the switching regulator circuit. The switching regulator circuit with a reference ground having an average offset voltage referenced to a package ground pin, wherein the average offset voltage is proportional to an output current of the switching regulator circuit with a first factor. The reference compensation module may be configured to receive a second reference signal…
Control circuits for switching power converters and associated methods
Granted: January 6, 2015
Patent Number:
8928300
The present application discloses a control circuit of a switching power converter, wherein the switching power converter comprises a power switch, and is configured to convert an input voltage into an output voltage, the control circuit comprises: a first time generating circuit configured to generate a first time signal; a phase lock circuit configured to generate a second time signal; and a switching signal generating circuit configured to generate a switching signal to control the ON…
High voltage FET device with voltage sensing
Granted: January 6, 2015
Patent Number:
8928043
A high voltage FET device provides drain voltage information with less overall silicon area consumption by forming a spiral resistance poly structure over a drift region of the high voltage FET device. The spiral resistance poly structure has an inner most end coupled to a drain region, and an outer most end coupled to a reference ground.
Electrostatic discharge protection circuit and method thereof
Granted: December 30, 2014
Patent Number:
8922963
An ESD protection circuit has a clamp control circuit and a clamp switch. The clamp switch has a first terminal, a second terminal and a control terminal, wherein the first terminal is coupled to a first node, and the second terminal is coupled to a second node. The clamp control circuit is coupled between the first node and the second node, wherein the clamp control circuit is configured to detect the rising time of the voltage between the first node and the second node, and to provide…
Multiphase converter with controllable phase shift
Granted: December 30, 2014
Patent Number:
8922177
A multiphase converter has a plurality of phase circuits and a plurality of phase control circuits. Each phase circuit has a switch having a control terminal, and the control terminal of the switch may be configured to receive a drive signal. Each phase control circuit may be corresponding to one of the phase circuits, and each phase control circuit may be configured to provide a phase control signal to adjust an ON-time period or a reference signal for the corresponding phase circuit.…
Method for forming dual gate insulation layers and semiconductor device having dual gate insulation layers
Granted: December 23, 2014
Patent Number:
8916439
Method of forming dual gate insulation layers and semiconductor device having dual gate insulation layers is disclosed. The method of forming dual gate insulation layers comprises forming a first thin layer of a thick gate insulation layer on a semiconductor substrate by oxidizing the semiconductor substrate, depositing a second thicker layer of the thick gate insulation layer on the first thin layer, removing a portion of the thick gate insulation layer to expose a surface area of the…
Off-line regulator with pass device and associated method
Granted: December 23, 2014
Patent Number:
8917076
An off-line regulator has a rectification circuit configured to rectify an AC line voltage into a rectified line voltage, a pass device coupled between the rectified line voltage and a first capacitor, and a converter. The pass device is configured to be turned ON or OFF according to a comparison signal indicating whether the rectified line voltage is over a threshold voltage. The first capacitor delivers an interim voltage into the converter which supplies power to a load. Wherein a…
Cot converter with controlled frequency and associated method
Granted: December 23, 2014
Patent Number:
8917073
A SMPS having a switch; an output port coupled to a load, configured to provide a voltage feedback signal and a current feedback signal; an on-time generator, having an input end coupled to the current feedback signal, and having an output end providing a time signal indicating a time period; and a PWM generator, having a first input end coupled to the voltage feedback signal, a second input end coupled to the time signal, and an output end providing a PWM signal that is coupled to the…
High voltage semiconductor device and the associated method of manufacturing
Granted: December 23, 2014
Patent Number:
8916913
The present disclosure discloses a high voltage semiconductor device and the associated methods of manufacturing. In one embodiment, the high voltage semiconductor device comprises: an epitaxial layer, a first low voltage well formed in the epitaxial layer; a second low voltage well formed in the epitaxial layer; a high voltage well formed in the epitaxial layer, wherein the second low voltage well is surrounded by the high voltage well; a first highly doping region formed in the first…
Control circuit of a DC/DC converter and the method thereof
Granted: December 16, 2014
Patent Number:
8912776
A control circuit of a DC/DC converter, wherein the DC/DC converter further comprises a high-side switch and a low-side switch, and wherein the DC/DC converter provides an output signal to a load. The control circuit comprises: an amplifier configured to receive a feedback signal and a reference signal to provide an error signal; a ramp generator configured to provide a ramp signal; a comparator configured to receive the ramp signal and the error signal to provide a comparison signal;…
Microelectronic flip chip packages with solder wetting pads and associated methods of manufacturing
Granted: December 9, 2014
Patent Number:
8906797
Processes of assembling microelectronic packages with lead frames and/or other suitable substrates are described herein. In one embodiment, a method for fabricating a semiconductor assembly includes forming an attachment area and a non-attachment area on a lead finger of a lead frame. The attachment area is more wettable to the solder ball than the non-attachment area during reflow. The method also includes contacting a solder ball carried by a semiconductor die with the attachment area…
TRIAC dimmer compatible LED driver and method thereof
Granted: December 2, 2014
Patent Number:
8901851
The present invention provides a controller used in a TRIAC dimmer compatible LED driver and method thereof. The controller comprises a dimming signal generator, a dimming signal processor and a switch control circuit. The dimming signal generator receives an AC chopped voltage from a TRIAC dimmer and generates a dimming signal with regulated duty cycle in accordance with the AC chopped voltage. The dimming signal processor is coupled to the dimming signal generator and generates a…
Analog switching circuit, associated control circuit and method
Granted: November 25, 2014
Patent Number:
8896363
The present invention discloses an analog switching circuit having a first terminal receiving an input signal, a second terminal providing an output signal and a control terminal receiving a switching control signal. The analog switching circuit has a first logic circuit providing a first control signal and a second control signal based on the switching control signal; an NMOS and a PMOS coupled between the first terminal and the second terminal, and controlled by the first control…
Multi-phase switching converter with overlap mode and control method thereof
Granted: November 25, 2014
Patent Number:
8896278
A multi-phase switching converter and control method thereof. The multi-phase switching converter includes a plurality of switching circuits and a controller. The output terminals of the plurality of switching circuits are coupled together to provide an output voltage to a load. The controller is configured to generate a plurality of control signals to turn on the plurality of switching circuits successively. When a load current increase is detected, the controller operates in an overlap…
LED driving system for driving multi-string LEDs and the method thereof
Granted: November 25, 2014
Patent Number:
8896214
A LED driving system comprising: an input port to receive an input signal; a switch node to provide a switching signal; an energy storage component coupled between the input port and the switch node; a main switch coupled between the switch node and ground; n output lines coupled in parallel, and each output line having a first and second terminals, and wherein the first terminal is coupled to the switch node, and the second terminal is coupled the reference ground, and wherein each…
Switch mode power supply and control method thereof
Granted: November 18, 2014
Patent Number:
8891258
In one embodiment, a switch mode power supply comprising a switch and a control circuit is disclosed. The control circuit may comprise a multi-function pin configured to receive a first current sampling signal and a first voltage sampling signal. A first comparing signal may be provided by comparing the first voltage sampling signal with a first threshold signal when the switch is turned OFF, and a second comparing signal may be provided by comparing the first current sampling signal…
Fast startup switching converter and method thereof
Granted: November 11, 2014
Patent Number:
8885362
A fast startup switching converter having a first switch, a second switch, a third switch, a first capacitor, and a controller controlling the ON and OFF switching of the second and third switches. The first terminal of the first switch is coupled to the input terminal of the switching converter, the second terminal is coupled to the first terminal of the second switch. The first terminal of the third switch is coupled to the second terminal of the first switch and the first terminal of…
Switching converter with pulse skipping mode and control method thereof
Granted: November 4, 2014
Patent Number:
8880969
The present invention provides a switching converter with pulse skipping mode. The switching converter comprises a switching circuit having at least one switch, a controller and a feedback circuit. The controller comprises an error amplifying circuit, a logic circuit, a ramp signal generator and a pulse skipping circuit. The error amplifying circuit generates a compensation signal based on comparing the feedback signal with a reference signal. The logic circuit generates a control signal…
Open LED bypass circuit and associated methods of operation
Granted: October 28, 2014
Patent Number:
8872440
The embodiments of the present circuit and method disclose a circuit to bypass a target circuit when an open status is detected. The present circuit may comprise a sample circuit, a monitoring circuit and a bypass circuit. The sample circuit may comprise a capacitor coupled to the target circuit. The monitoring circuit may be coupled to the capacitor and may have an output configured to generate an output signal selectively indicating the open status. The bypass circuit may comprise a…
