SWITCHING MODE POWER SUPPLY AND THE METHOD THEREOF
Granted: November 14, 2013
Application Number:
20130301311
A switching mode power supply, having: an input port; an output port; an energy storage component and a pair of power switches coupled between input port and the output port; an error amplifier configured to generate an amplified error signal based on the feedback signal and the reference signal; an error comparator configured to generate a frequency control signal based on the amplified error signal and the first sawtooth signal; a peak current generator configured to generate a peak…
ISOLATED SWITCHING MODE POWER SUPPLY AND THE METHOD THEREOF
Granted: November 14, 2013
Application Number:
20130301310
An isolated switching mode power supply, having: an input terminal; an output terminal; a transformer having a primary winding and a secondary winding; a primary power switch coupled to the primary winding; a secondary power switch coupled between the secondary winding and the output terminal of the power supply; a secondary controller configured to generate a frequency modulation signal based on the output voltage and the first feedback signal; a coupled device configured to provide a…
ANALOG SWITCHING CIRCUIT, ASSOCIATED CONTROL CIRCUIT AND METHOD
Granted: November 14, 2013
Application Number:
20130300493
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…
SYNCHRONOUS RECTIFICATION CIRCUIT AND ASSOCIATED ZERO-CROSSING DETECTION METHOD
Granted: November 14, 2013
Application Number:
20130300400
The embodiments of the present invention disclose a synchronous rectification circuit and associated zero-crossing detection method. The synchronous rectification circuit includes a synchronous rectifier having a source, a drain, and at least two gates. The synchronous rectifier having N MOS cells connected in parallel, wherein N is an integer greater than or equal to 2. Through comparing a voltage signal across the drain and the source of the synchronous rectifier with a first and a…
CHARGE-PUMP VOLTAGE DIVIDER AND ASSOCIATED CONTROL METHOD
Granted: November 14, 2013
Application Number:
20130300385
The embodiments of the present invention disclose a charge-pump voltage divider and associated start-up method. The charge-pump voltage divider comprises a start-up circuit that can regulate an inrush current during start up. The start-up circuit comprises a switch, which operates in linear region state during start-up, and operates in switching state after the start-up completes. The charge-pump voltage divider may further comprise a load control switch configured to ensure the start-up…
ISOLATED SWITCHING MODE POWER SUPPLY AND THE METHOD THEREOF
Granted: November 14, 2013
Application Number:
20130300384
An isolated switching mode power supply, having: a transformer having a primary winding, a secondary winding and a third winding; a current limit comparator configured to provide a current limit signal based on the current sense signal and the peak current signal; a logic circuit configured to provide a logic control signal based on the frequency control signal and the current limit signal; a startup control circuit configured to generate a startup control signal based on the current…
LIGHT EMITTING ELEMENT DRIVING CIRCUITS WITH DIMMING FUNCTION AND CONTROL METHODS THEREOF
Granted: November 7, 2013
Application Number:
20130293154
A controller used in a light emitting element driving circuit, wherein the light emitting element driving circuit has a power converter configured to provide an output current for the light emitting element. The controller has a dimming processing unit and a current control unit. The dimming processing unit is configured to receive a first dimming signal with a first duty cycle and a second dimming signal with a second duty cycle, and to generate a second dimming processing signal…
HIGH VOLTAGE SWITCHING DEVICE THE METHOD FOR FORMING THEREOF
Granted: October 24, 2013
Application Number:
20130277755
A high voltage switching device and associated method of manufacturing, the high voltage switching device having a substrate, an epitaxial layer, a source region, a drain region, a drift region, a gate oxide, a filed oxide, a gate and a snake shaped poly.
CLASS D AUDIO AMPLIFIER WITH NOISE SUPPRESSION AND THE METHOD THEREOF
Granted: October 17, 2013
Application Number:
20130271215
A class D audio amplifier having: an audio control circuit configured to provide a switching signal based on an input signal and a reference signal; an input capacitor coupled between the input signal and the first input terminal of the audio control circuit; an inductor having a first terminal coupled to the switching terminal of the audio control circuit, and a second terminal; an output capacitor having a first terminal coupled to second terminal of the inductor and a second terminal…
DELAY CIRCUIT AND ASSOCIATED METHOD
Granted: October 3, 2013
Application Number:
20130257502
The embodiments of the present invention disclose a delay circuit. The delay circuit comprises an inverter, a load capacitor, and a first voltage clamping module, wherein the first voltage clamping module generates a voltage drop configured to prolong the propagation delay time of the delay circuit as the power supply voltage decreases. The power supply dependent delay circuit may have a much larger propagation delay time at low power supply voltage than it at high power supply voltage…
CONSTANT ON-TIME SWITCHING CONVERTER AND CONTROL METHOD THEREOF
Granted: October 3, 2013
Application Number:
20130257399
A controller used in a switching converter. The switching converter includes a switching circuit having at least one switch. The controller comprises an on-time control circuit generating an on-time control signal, a slope compensation circuit generating a slope compensation signal, a comparing circuit, a logic circuit and a load detection circuit. The comparing circuit generates a comparison signal based on the slope compensation signal, a reference signal and the output voltage of the…
DISCHARGE CIRCUITS FOR EMI FILTERS CAPACITORS AND METHODS THEREOF
Granted: September 19, 2013
Application Number:
20130242626
A discharge circuit for an EMI filter capacitor, wherein the EMI filter capacitor is coupled between input terminals of a switching converter. The discharge circuit has a detecting circuit and a current source. The detecting circuit is configured to detect whether an electrical source is coupled to the input terminals of the switching converter. The current source is coupled between the input terminals of the switching converter and a power supply capacitor, and is configured to provide…
SWITCHING POWER SUPPLY WITH FIXED OFF TIME MODE AND CONTROL METHOD THEREOF
Granted: September 19, 2013
Application Number:
20130241511
The present invention provides a controller used in a switching power supply. The controller comprises an oscillator, a first comparison circuit and a logic circuit. The oscillator generates a slope compensation signal and a clock signal. The first comparison circuit generates a first comparison signal in accordance with a current sensing signal, a feedback signal and the slope compensation signal. The logic circuit generates a control signal to control the main switch based on the clock…
SEMICONDUCTOR DEVICE AND ASSOCIATED FABRICATION METHOD
Granted: September 12, 2013
Application Number:
20130234245
A super junction structural semiconductor device with a substantially rectangle-shaped first region, and a second region surrounding the periphery of the first region; trench gate MOSFET units in the first region comprising a plurality of trench gate regions and a first plurality of pillars; a body region between the trench gate regions and the first plurality of pillars; a second plurality of pillars in the second region extending along a corresponding side of the first region…
SMART LOW DROP-OUT VOLTAGE REGULATOR AND ASSOCIATED METHOD
Granted: July 11, 2013
Application Number:
20130176009
The present disclosure discloses a low drop-out voltage regulator and an electronic device comprising the same. The present disclosure also discloses a method for converting a power supply voltage to a regulated output voltage. The low drop-out voltage regulator comprises a pass device controllable to convert a power supply voltage to a regulated output voltage; and a controller configured to receive an input signal and to provide a driving signal to the control terminal of the pass…
SWITCHING MODE POWER SUPPLY
Granted: July 11, 2013
Application Number:
20130176004
The present disclosure discloses a switching mode power supply with constant peak current mode control. During the operation of the switching mode power supply, in one hand, the current flowing through a high-side switch is sensed and compared to a current reference signal to control the turning off of the high-side switch; in the other hand, the output voltage is sensed and compared to a voltage reference signal to control the turning on of the high-side switch. In addition, the current…
PHASE-SHIFT DIMMING CIRCUIT FOR LED CONTROLLER AND THE METHOD THEREOF
Granted: July 4, 2013
Application Number:
20130169173
A phase-shift dimming circuit for LED controller having a delay signal generator configured to receive a PWM input signal, and to provide a plurality of pairs of set signal and reset signal, the set signal and the reset signal respectively having pulses; and a plurality of latches configured to respectively receive the plurality of pairs of set signal and reset signal to generate a plurality of PMW output signals, each of the PWM output signals having pulses, and wherein the rising edge…
FAILURE DETECTOR CIRCUIT AND ASSOCIATED METHOD
Granted: June 13, 2013
Application Number:
20130147537
A failure detector circuit for detecting status of a protected circuit, the failure detector circuit having an operating cycle, has an enabling signal generator, a comparator circuit, a delay circuit. The enabling signal generator enables the comparator for an enable time in each operating cycle. The comparator circuit compares an output of the protected circuit with a reference signal. The delay circuit receives an output signal of the comparator to decide whether a failure occurred…
SWITCHING REGULATOR WITH ERROR CORRECTION AND CONTROL METHOD THEREOF
Granted: June 13, 2013
Application Number:
20130147454
A switching regulator configured to provide an output voltage comprises a power stage, an error correction circuit, a comparator, an ON-time generator and a logic circuit. The error correction circuit generates an error correction voltage based on a reference voltage and a feedback voltage representative of the output voltage. The comparator compares the feedback voltage with the difference between the reference voltage and the error correction voltage, and generates a comparison signal.…
SWITCH MODE POWER SUPPLY SYSTEM, ASSOCIATED CONTROLLER AND METHOD
Granted: June 6, 2013
Application Number:
20130141069
A switch mode power supply system has a constant on-time signal generator, a logic circuit, a feedback circuit, a first ramp signal generator, a second ramp signal generator, a switch circuit having a power switch, and a comparator. A feedback signal from the feedback circuit is compensated by the first ramp signal generator, and a reference signal is compensated by the second ramp signal generator. The comparator compares the compensated feedback signal with the compensated reference…
