This application discloses a direct current to direct current converter, an electronic device, and a charger, to strike a balance between efficiency and a voltage conversion range. The direct current to direct current converter includes a switch circuit, an auxiliary circuit, a transformer, and a first half-wave rectifier circuit. The transformer is configured to: when the switch circuit is in a first state, store first electric energy transmitted by the auxiliary circuit; and when the switch circuit is in a second state, receive second electric energy transmitted by the auxiliary circuit, and output the received second electric energy and the stored first electric energy to the first half-wave rectifier circuit.

A control circuit for controlling a power converter can include: a constant voltage output module, a constant current output module, and a power stage circuit; and where the control circuit is configured to select one of a first feedback signal representative of output information of the constant current output module, and a second feedback signal representative of output information of the constant voltage output module as a feedback input signal based on operation states of the constant current output module and the constant voltage output module, in order to control a switching state of a power switch of the power stage circuit.

A switching power converter includes a power circuit including at least two power switching devices and a control circuit coupled to the power circuit for controlling the power switching devices. The control circuit is configured to sense an output voltage of the power circuit, generate at least two ramp signals based on complementary clock signals, and generate a control signal for controlling one of the power switching devices based on one of the ramp signals and the output voltage of the power circuit, and another control signal for controlling another one of the power switching devices based on another one of the ramp signals and the output voltage of the power circuit. In some examples, the control circuit may include comparators for generating the control signals. Other example power converters and control circuits are also disclosed.

An aerosol delivery device is provided that includes an aerosol precursor composition and a quasi-resonant flyback converter configured to cause components of the aerosol precursor composition to vaporize to produce an aerosol. The quasi-resonant flyback converter includes a transformer including an induction transmitter and an induction receiver, a capacitor that with the induction transmitter forms a tank circuit. The quasi-resonant flyback converter also includes a transistor that is switchable in cycles to cause the induction transmitter to generate an oscillating magnetic field and induce an alternating voltage in the induction receiver when exposed to the oscillating magnetic field, the alternating voltage causing the induction receiver to generate heat and thereby vaporize components of the aerosol precursor composition.

Disclosure includes a control method in use of a switching-mode power supply that supplies an output voltage to a load. A line voltage generated by rectifying an alternating-current voltage is detected to compare with a first reference voltage. A control signal is generated in response to the comparison of the line voltage and the first reference voltage. When the line voltage is less than the first reference voltage, the control signal is used to increase converted power that the switching-mode power supply provides to the output voltage. When the line voltage is not less than the first reference voltage, the control signal has no influence to the converted power.

The present disclosure relates to an adapter. The adapter includes an input port, a first output port and a second output port, and the adapter further includes: a rectifier circuit having an input terminal being connected to the input port of the adapter; a bus capacitor connected to an output terminal of the rectifier circuit in parallel; a first flyback converter having an input terminal connected to the bus capacitor and an output terminal coupled to the first output port; and a second flyback converter having an input terminal connected to the bus capacitor and an output terminal coupled to the second output port.

Embodiments of an SMPS controller and a method for operating a switched-mode power supply (SMPS) controller are described. In an embodiment, an SMPS controller includes a gate driver circuit configured to generate a drive signal for a switch of an SMPS and a current sense electrical terminal configured to receive sensed current corresponding to the switch and to conduct driver discharge current from the gate driver circuit.

A technique for dynamically adjusting an output voltage for a welding or cutting operation is provided. The technique allows for varying output voltage at the welding or cutting torch by manipulating the duty cycles of two forward converter circuits. The present disclosure provides methods and systems for increasing synchronized duty cycles in a pair of forward converter circuits in response to increasing output voltage demand then changing a phase shift between the duty cycles in response to further increases in output voltage demand. The present disclosure provides a controller designed to receive input signals and generate output pulse width modulation signals that control the duty cycle width and phase shift of the outputs of the forward converter circuits in response to these signals. Methods of accommodating for the time needed for the transformer core to reset via leading edge or lagging edge compensation are provided.

A phase-shifted full bridge (PSFB) switching converter includes a transistor full-bridge having first and second half-bridges. Each half-bridge includes a high-side transistor and a low-side transistor. A controller circuit is configured to generate a drive signal for each transistor. The (first/third and second/fourth) drive signals for the transistors of each half-bridge are periodic with a cycle period, pulse-width modulated and have a temporal offset to each other that equals half of the cycle period. The drive signals for the half-bridges are phase shifted-with respect to one another. The controller circuit also is configured to generate the first drive signal so that the first high-side transistor is switched off when the third drive signal indicates to switch on the second high-side transistor, and to generate the second drive signal so that the first low-side transistor is switched off when the fourth drive signal indicates to switch on the second low-side transistor.

A diagnostic system for a DC-DC voltage converter includes a microcontroller having a first diagnostic handler application and first and second applications. The first application sets a first non-recoverable diagnostic flag associated with the DC-DC voltage converter to a first encoded value having each nibble thereof selected from an odd Karnaugh set of binary values. The second application sets a second non-recoverable diagnostic flag to a second encoded value having each nibble thereof selected from an even Karnaugh set of binary values. The first diagnostic handler application sets a first master non-recoverable diagnostic flag to a first encoded fault value if the first non-recoverable diagnostic flag is equal to a second encoded fault value, or the second non-recoverable diagnostic flag is equal to a third encoded fault value.