Abstract: A power delivery controller applied to a power converter includes a voltage compensation circuit and a comparator. The voltage compensation circuit is used for generating a compensation reference voltage, receiving a response signal through a universal serial bus type-C cable, and generating a response voltage when an electronic device coupled to the universal serial bus type-C cable generates the response signal corresponding to a Biphase Mark Coding (BMC) signal, wherein the response voltage and the compensation reference voltage have information relative to an internal resistor of the universal serial bus type-C cable. The comparator is used for generating a comparison signal according to the response voltage and the compensation reference voltage, wherein the power converter transmits power to the electronic device according to a specification corresponding to universal serial bus power delivery (USB-PD) after the comparator generates the comparison signal.

Abstract: A controller for increasing efficiency of a power converter includes a comparison module and a gate signal generation unit. The comparison module is used for generating a detection voltage according to a direct current (DC) input voltage of a primary side of the power converter, and comparing the detection voltage with a predetermined value to generate a comparison result. The gate signal generation unit is used for changing a sink current flowing through a gate pin of the controller according to the comparison result, wherein the gate pin of the controller is coupled to a power switch of the primary side of the power converter.

Abstract: A synchronous rectifier applied to a secondary side of a power converter includes a forbidden turning-on time generation circuit, a green mode signal generation circuit, and a controller. The forbidden turning-on time generation circuit generates a forbidden turning-on time corresponding to the secondary side according to a synchronous signal of the secondary side. The green mode signal generation circuit enables a green mode signal when the forbidden turning-on time is greater than a reference value by at least one time, and disables the green mode signal when the forbidden turning-on time is continuously less than a reference value by a predetermined number of times. The reference value is changed with an output voltage of the secondary side. The controller enters a green mode when the green mode signal is enabled, and leaves the green mode when the green mode signal is disabled.

Abstract: A sample-and-hold circuit includes a first voltage generation unit, a second voltage generation unit, a stabilization capacitor. The first voltage generation unit generates a first voltage according to a first predetermined delay time and a voltage corresponding to an auxiliary winding of a power converter. The second voltage generation unit generates a second voltage according to K multiple of a discharge time of a secondary side of the power converter during a previous period of the power converter and the voltage, wherein K<1. When a sum of the K multiple of the discharge time and a second predetermined delay time leads a first valley of the voltage corresponding to a current period of the power converter, the second voltage generation unit outputs the second voltage. When the sum lags the first valley, the first voltage generation unit outputs the first voltage.

Abstract: A multi-mode controller applied to a power converter includes a detection range generation module and a gate signal generation unit. The detection range generation module is used for generating a comparison voltage according to a reference current, and generating a detection signal according to the comparison voltage and a first reference voltage. When the detection signal is disabled by a zero-crossing signal, the gate signal generation unit generates a gate control signal corresponding to a quasi-resonant mode of the power converter according to the zero-crossing signal; and when the detection signal is disabled by a continuous-conduction mode signal generated by the detection range generation module according to the comparison voltage and a second reference voltage, the gate signal generation unit generates the gate control signal corresponding to a continuous-conduction mode of the power converter according to the continuous-conduction mode signal.

Abstract: A synchronous rectifier applied to a power converter includes a control signal generation circuit, a pre-attenuation circuit, and a gate driving circuit. The control signal generation circuit generates a control signal corresponding to a previous period of a secondary side of the power converter according to a detection signal corresponding to the previous period, a first reference voltage, and a second reference voltage when the secondary side is turned on. The control signal corresponding to the previous period corresponds to a discharge time of the previous period. The pre-attenuation circuit pre-attenuates agate control signal corresponding to a current period of the secondary side and generates a pre-attenuation signal corresponding to the current period according to the discharge time. The gate driving circuit drives the gate control signal according to the control signal corresponding to the current period, and stops driving the gate control signal according to the pre-attenuation signal.

Abstract: A control circuit for compensating output loss of a power converter includes a sampling voltage generator, a time-to-voltage converter, and a compensation signal generator. The sampling voltage generator generates a sampling voltage corresponding to a detection voltage according to a first reference current, a second reference current, and the detection voltage. The time-to-voltage converter generates a corresponding voltage according to a period of a gate control signal controlling a power switch of a primary side of the power converter and a discharge time of a secondary side of the power converter. The compensation signal generator generates a compensation signal compensating the output loss according to the sampling voltage and the corresponding voltage.

Abstract: A power metal-oxide-semiconductor field-effect transistor (MOSFET) device includes a first metal layer, a substrate, an epitaxy layer, a plurality of first trench wells, a plurality of second trench wells, a plurality of body structure layers, a plurality of polysilicon layers, and a second metal layer. A part of a depletion region is formed between each first trench well and the epitaxy layer and between a body structure layer corresponding to the each first trench well and the epitaxy layer, and a rest part of the depletion region is formed between a second trench well corresponding to the each first trench well and the epitaxy layer. The plurality of second trench wells increase a breakdown voltage of the power MOSFET device and reduce a conduction resistor of the power MOSFET device.

Abstract: A vertical double diffusion metal-oxide-semiconductor power device with thermal sensitivity unit includes a vertical double diffusion metal-oxide-semiconductor power transistor and at least one thermal sensitivity unit. The vertical double diffusion metal-oxide-semiconductor power transistor includes a first metal layer, a substrate layer, an epitaxy layer, a second metal layer, and a plurality of first polysilicon layers, wherein each first polysilicon layer of the plurality of first polysilicon layers corresponds to a first oxide layer, a first doping well and a second doping well with second conductivity type, a first doped region and a second doped region with first conductivity type, and a second oxide layer.

Abstract: A secondary controller applied to a secondary side of a power converter includes a detector and a standby signal generation circuit. The detector is used for detecting a first signal and a second signal of a universal serial bus device, and a frequency of a synchronization signal corresponding to a primary side of the power converter. The standby signal generation circuit is coupled to the detector for delaying a first predetermined time to generate a standby signal to a primary controller of the primary side of the power converter when the detector fails to detect the first signal and the second signal, and the frequency of the synchronization signal is less than a first predetermined frequency, wherein the primary controller enters a standby mode according to the standby signal.

Abstract: Power supplies together with related over voltage protection methods and apparatuses. A power supply has a transformer including a primary winding and an auxiliary winding. A power switch is coupled to the primary winding and a sensing resistor coupled between the power switch and a grounding line. A multi-function terminal of a controller is coupled to the sensing resistor. A diode and a first resistor is coupled between the auxiliary winding and the multi-function terminal.

Abstract: A multi-mode controller applied to a power converter includes a detection range generation module and a gate signal generation unit. The detection range generation module is used for generating a comparison voltage according to a reference current, and generating a detection signal according to the comparison voltage and a first reference voltage. When the detection signal is disabled by a zero-crossing signal, the gate signal generation unit generates a gate control signal corresponding to a quasi-resonant mode of the power converter according to the zero-crossing signal; and when the detection signal is disabled by a continuous-conduction mode signal generated by the detection range generation module according to the comparison voltage and a second reference voltage, the gate signal generation unit generates the gate control signal corresponding to a continuous-conduction mode of the power converter according to the continuous-conduction mode signal.

Abstract: A controller applied to a secondary side of a power convertor includes a sampling/tracking circuit and a comparator. The sampling/tracking circuit is coupled to the secondary side of the power convertor for generating a sampling value corresponding to an output voltage of the power convertor when a sampling signal is enabled, and generating a tracking value corresponding to the output voltage. The comparator is coupled to the sampling/tracking circuit for generating a warning signal to a primary-side regulation controller of the power converter according to the sampling value and the tracking value during an enabling period of a tracking signal. The primary-side regulation controller adjusts a frequency of a gate control signal according to the warning signal, and the sampling signal and the tracking signal are not enabled simultaneously.

Abstract: A protection circuit applied to an alternating current (AC) power source includes a sample-and-hold unit, a detection unit, and a discharge signal generation unit. The sample-and-hold unit samples a peak value of a direct current (DC) voltage during each period of a corresponding AC voltage, wherein the AC power source provides the AC voltage. The detection unit generates a detection signal when the DC voltage crosses a reference voltage corresponding to the peak value. The discharge signal generation unit generates a count signal when the discharge signal generation unit does not receive the detection signal within a predetermined time of a period of the AC voltage, accumulates the count signal, and generates a discharge signal to a discharge unit when a number of accumulated count signals is greater than a predetermined value, wherein the discharge unit discharges an X capacitor according to the discharge signal.

Abstract: A sample-and-hold circuit includes a first voltage generation unit, a second voltage generation unit, a stabilization capacitor. The first voltage generation unit generates a first voltage according to a first predetermined delay time and a voltage corresponding to an auxiliary winding of a power converter. The second voltage generation unit generates a second voltage according to K multiple of a discharge time of a secondary side of the power converter during a previous period of the power converter and the voltage, wherein K<1. When a sum of the K multiple of the discharge time and a second predetermined delay time leads a first valley of the voltage corresponding to a current period of the power converter, the second voltage generation unit outputs the second voltage. When the sum lags the first valley, the first voltage generation unit outputs the first voltage.

Abstract: A synchronous rectifier applied to a power converter includes a power supply module, a control module, and a gate driving unit. The power supply module is used for generating a supply current according to an induced voltage generated from a secondary side of the power converter, wherein the supply current is used for establishing a supply voltage, and the induced voltage corresponds to a control signal of a power switch of a primary side of the power converter. The control module is coupled to the power supply module for turning on or turning off the power supply module according to the supply voltage. The gate driving unit is coupled to the power supply module for generating a gate control signal controlling turning-on and turning-off of a synchronous switch of the secondary side of the power converter, wherein the supply voltage is used for driving the gate driving unit.

Abstract: A synchronous rectifier applied to a power converter includes a gate coupling effect suppressing unit. The gate coupling effect suppressing unit is used for suppressing an induced voltage coupled to a gate of a metal-oxide-semiconductor transistor coupled to a secondary side of the power converter to ensure that the metal-oxide-semiconductor transistor is turned off when the power converter operates in a start-up condition and a power switch of the power converter is turned on. When the power converter operates in the start-up condition, a driving voltage of the secondary side of the power converter for driving the synchronous rectifier is not enough to drive the synchronous rectifier yet.

Abstract: A controller of a power converter includes a sample-and-hold unit and an adjustment unit, wherein the power converter is applied to a Universal Serial Bus power delivery adapter system. The sample-and-hold unit is used for sampling a voltage to generate a sampling voltage during each period of a gate control signal, wherein the sampling voltage corresponds to an output voltage of the power converter. The adjustment unit is coupled to the sample-and-hold unit for adjusting at least one of a frequency of the gate control signal, a current flowing through a primary side of the power converter, and a resistance of a compensation resistor of the controller according to the sampling voltage.

Abstract: A method for controlling a dead time of a secondary side of a power converter includes giving a previous first turning-on time and a current first turning-on time corresponding to a primary side of the power converter, generating a first voltage and a second voltage according to the previous first turning-on time and the current first turning-on time, respectively, generating a current first target voltage according to the first voltage, the second voltage, and an ideal voltage corresponding to a previous ideal second turning-on time of the secondary side, and determining a current second turning-on time of the secondary side according to the current first target voltage and a first ramp voltage corresponding to a current ideal second turning-on time of the secondary side. A difference between the current second turning-on time and the current ideal second turning-on time is a current dead time.

Abstract: A control circuit applied to a power converter includes a multi-functional pin, a zero-crossing signal generator, and an over-voltage detector. The multi-functional pin is used for receiving an auxiliary current generated by an auxiliary winding of the power converter, and an input current. The zero-crossing signal generator is used for generating a zero-crossing signal according to the auxiliary current. The over-voltage detector is used for generating an over-voltage signal according to the auxiliary current. The control circuit generates a switch control signal to the power switch according to the zero-crossing signal, or generates an over-voltage protection signal to the power switch according to the over-voltage signal.