Abstract: A flyback converter to control conduction time in AC/DC conversion technology. The flyback converter includes a primary side and a secondary side. The primary side includes a main switch connecting a primary coil to the input of the flyback converter in series. The secondary side includes a secondary coil coupling with the output terminal of the flyback converter. When a switching frequency of the main switch is at a preset first on time in the range between the off frequency and the second switching frequency, the on-time of the main switch continuously changes corresponding to output load changes. When the switching frequency of the main switch is higher than the first switching frequency, the on time of the main switch is constant. The on time is controlled to change linearly, so as to avoid excessive changes in the output voltage ripples, thereby improving circuit efficiency.

Abstract: A flyback converter to control conduction time in AC/DC conversion technology. The flyback converter includes a primary side and a secondary side. The primary side includes a main switch connecting a primary coil to the input of the flyback converter in series. The secondary side includes a secondary coil coupling with the output terminal of the flyback converter. When a switching frequency of the main switch is at a preset first on time in the range between the off frequency and the second switching frequency, the on-time of the main switch continuously changes corresponding to output load changes. When the switching frequency of the main switch is higher than the first switching frequency, the on time of the main switch is constant. The on time is controlled to change linearly, so as to avoid excessive changes in the output voltage ripples, thereby improving circuit efficiency.

Abstract: A signal transmission circuit is configured for transmitting control information from a secondary side of a power converter to a primary side of the power converter. The signal transmission circuit includes a transmitter circuit, a signal transformer and a detection circuit. The transmitter circuit is configured to generate a ramp signal at least according to a first control signal outputted from the secondary side. The first control signal indicates the control information provided for a switch in the primary side. The signal transformer, coupled to the transmitter circuit, is configured to convert the ramp signal to generate an output signal. The output signal includes a positive-going component and a negative-going component to indicate the control information. The detection circuit, coupled to the signal transformer, is configured to detect the positive-going component and the negative-going component to provide the control information for the switch.

Abstract: A flyback converter to control conduction time in AC/DC conversion technology. The flyback converter includes a primary side and a secondary side. The primary side includes a main switch connecting a primary coil to the input of the flyback converter in series. The secondary side includes a secondary coil coupling with the output terminal of the flyback converter. When a switching frequency of the main switch is at a preset first on time in the range between the off frequency and the second switching frequency, the on-time of the main switch continuously changes corresponding to output load changes. When the switching frequency of the main switch is higher than the first switching frequency, the on time of the main switch is constant. The on time is controlled to change linearly, so as to avoid excessive changes in the output voltage ripples, thereby improving circuit efficiency.

Abstract: When a constant on-time flyback converter is in the switch-on stage, the gate voltage of the switch and the input voltage of the flyback converter adopt the primary side of the transformer to control. The gate voltage is controlled by the second control signal generated by the controller. The flyback converter is then turn off to enter the switch off stage. When the flyback converter is in the switch off stage, the secondary side controller on the secondary side of the transformer, based on the output voltage and output current of the secondary side, sends a first control signal to the primary side controller to control the main switch to turn on. Thus, the flyback converter enters the switch-on stage. Therefore, the calculation complexity is reduced, and there is no need to set a blanking time, such that the flyback converter can be used in high switching frequency applications.

Abstract: A signal transmission circuit is configured for transmitting control information from a secondary side of a power converter to a primary side of the power converter. The signal transmission circuit includes a transmitter circuit, a signal transformer and a detection circuit. The transmitter circuit is configured to generate a ramp signal at least according to a first control signal outputted from the secondary side. The first control signal indicates the control information provided for a switch in the primary side. The signal transformer, coupled to the transmitter circuit, is configured to convert the ramp signal to generate an output signal. The output signal includes a positive-going component and a negative-going component to indicate the control information. The detection circuit, coupled to the signal transformer, is configured to detect the positive-going component and the negative-going component to provide the control information for the switch.

Abstract: When a constant on-time flyback converter is in the switch-on stage, the gate voltage of the switch and the input voltage of the flyback converter adopt the primary side of the transformer to control. The gate voltage is controlled by the second control signal generated by the controller. The flyback converter is then turn off to enter the switch off stage. When the flyback converter is in the switch off stage, the secondary side controller on the secondary side of the transformer, based on the output voltage and output current of the secondary side, sends a first control signal to the primary side controller to control the main switch to turn on. Thus, the flyback converter enters the switch-on stage. Therefore, the calculation complexity is reduced, and there is no need to set a blanking time, such that the flyback converter can be used in high switching frequency applications.

Abstract: A flyback converter to control conduction time in AC/DC conversion technology. The flyback converter includes a primary side and a secondary side. The primary side includes a main switch connecting a primary coil to the input of the flyback converter in series. The secondary side includes a secondary coil coupling with the output terminal of the flyback converter. When a switching frequency of the main switch is at a preset first on time in the range between the off frequency and the second switching frequency, the on-time of the main switch continuously changes corresponding to output load changes. When the switching frequency of the main switch is higher than the first switching frequency, the on time of the main switch is constant. The on time is controlled to change linearly, so as to avoid excessive changes in the output voltage ripples, thereby improving circuit efficiency.

Abstract: A data storage device including a flash memory and a controller. The controller performs a first read operation on the pages of a first block of a first block group, and performs a maintenance process to determine whether the first group read count of the first block group is greater than a read threshold when the first read operation is finished. The controller scans the blocks of the first block group to obtain a plurality of first error bit numbers when the first group read count is greater than the read threshold, and updates the block corresponding to the first error bit number that is greater than an error-bit threshold.

Abstract: A data storage device including a flash memory and a controller. The controller performs a first read operation on the pages of a first block of a first block group, and performs a maintenance process to determine whether the first group read count of the first block group is greater than a read threshold when the first read operation is finished. The controller scans the blocks of the first block group to obtain a plurality of first error bit numbers when the first group read count is greater than the read threshold, and updates the block corresponding to the first error bit number that is greater than an error-bit threshold.

Abstract: A data storage device including a flash memory and a controller. The controller performs a first read operation on the pages of a first block of a first block group, and performs a maintenance process to determine whether the first group read count of the first block group is greater than a read threshold when the first read operation is finished. The controller scans the blocks of the first block group to obtain a plurality of first error bit numbers when the first group read count is greater than the read threshold, and updates the block corresponding to the first error bit number that is greater than an error-bit threshold.

Abstract: A data storage device including a flash memory, a temperature sensor, and a controller. The temperature sensor detects surrounding ambient temperature. The controller reads the temperature sensor to obtain a current temperature parameter at a predetermined time, compares a plurality of write temperatures of the blocks with the current temperature parameter one by one, and writes data stored in at least one first block of the blocks into at least one third block of the blocks, wherein the first block corresponds to at least one first write temperature of the write temperatures, and the difference between the first write temperature and the current temperature parameter is greater than a predetermined value.

Abstract: A data storage device including a flash memory and a controller. The controller performs a first read operation on the pages of a first block of a first block group, and performs a maintenance process to determine whether the first group read count of the first block group is greater than a read threshold when the first read operation is finished. The controller scans the blocks of the first block group to obtain a plurality of first error bit numbers when the first group read count is greater than the read threshold, and updates the block corresponding to the first error bit number that is greater than an error-bit threshold.

Abstract: A switching regulator for outputting an output voltage is disclosed. The switching regulator includes an upper gate switch, for turning on and turning off according to an upper gate control signal; a lower gate switch, coupled to the upper gate switch, for turning on and turning off according to a lower gate control signal; and a logic circuit, for generating the lower gate control signal according to a lower gate off signal. The lower gate switch turns off during an activation period of the switching regulator.

Abstract: An overcurrent detection circuit for a DC-to-DC power converter is disclosed. The overcurrent detection circuit includes a dynamic reference unit for outputting a dynamic reference signal, a load current measurement unit for measuring a load current of the DC-to-DC power converter to output a measurement signal, and a first comparator including a positive input terminal coupled to the load current measurement unit, a negative input terminal coupled to the dynamic reference unit and an output terminal coupled to an overcurrent protection device for outputting an overcurrent protection signal to activate the overcurrent protection device when the measurement signal is greater than the dynamic reference signal.

Abstract: A switching regulator for outputting an output voltage is disclosed. The switching regulator includes an upper gate switch, for turning on and turning off according to an upper gate control signal; a lower gate switch, coupled to the upper gate switch, for turning on and turning off according to a lower gate control signal; and a logic circuit, for generating the lower gate control signal according to a lower gate off signal. The lower gate switch turns off during an activation period of the switching regulator.

Abstract: An overcurrent detection circuit for a DC-to-DC power converter is disclosed. The overcurrent detection circuit includes a dynamic reference unit for outputting a dynamic reference signal, a load current measurement unit for measuring a load current of the DC-to-DC power converter to output a measurement signal, and a first comparator including a positive input terminal coupled to the load current measurement unit, a negative input terminal coupled to the dynamic reference unit and an output terminal coupled to an overcurrent protection device for outputting an overcurrent protection signal to activate the overcurrent protection device when the measurement signal is greater than the dynamic reference signal.

Abstract: A short circuit protection circuit for a power supply device includes a driving transistor, for controlling to output an input voltage to a load according to a first control voltage; a shutdown transistor, coupled with the driving transistor, for controlling a level of the first control voltage according to a second control voltage; and an energy storage module, coupled with the shutdown transistor, for storing energy of the input voltage, to output a specific voltage as the second control voltage in a specific interval after short-circuit occurs.

Abstract: A short circuit protection circuit for a power supply device includes a driving transistor, for controlling to output an input voltage to a load according to a first control voltage; a shutdown transistor, coupled with the driving transistor, for controlling a level of the first control voltage according to a second control voltage; and an energy storage module, coupled with the shutdown transistor, for storing energy of the input voltage, to output a specific voltage as the second control voltage in a specific interval after short-circuit occurs.

Abstract: A method for die attaching is disclosed. At first, at least one die and a die-attach preform are separately provided. The die-attach preform is picked and placed upon a die carrier. Then, the die is picked and placed upon the die-attach preform. The die and the die carrier are heated and clipped, so that the die-attach preform can adhere the die and the die carrier at the same time.