5results about How to "Improve transient response" patented technology

The invention discloses an electronic assembly and a vertical power supply module. The electronic component comprises a mother board, a processor and a vertical power supply module. The mother board includes a first face and a second face. The processor includes a first face processor substrate mounted on the motherboard; the vertical power supply module is electrically connected to the processor to supply power to the processor. The vertical power supply module is attached to the processor substrate through an aperture through the motherboard.

The utility model provides an IGBT driving circuit based on a push-pull structure, and relates to the technical field of power electronic device driving, and the IGBT driving circuit comprises an optocoupler isolation module which is used for receiving a control signal and providing electrical isolation output; the push-pull driving module comprises an NPN type triode Q1 and a PNP type triode Q2 which are complementary and symmetrical; the push-pull driving module is configured as follows: when the optocoupler is conducted, Q1 is saturated and conducted, Q2 is cut off, and a driving current charges an IGBT grid electrode through R2; when the optocoupler is turned off, the Q2 is saturated and turned on, the Q1 is turned off, and the driving current flows through the R3 to discharge the grid electrode of the IGBT. Bidirectional driving current is provided through a push-pull structure, the charge charging and discharging speed of the IGBT grid electrode is increased, the switching loss is reduced, bidirectional driving current is provided through a switch-on resistor R2 and a switch-off resistor R3, the resistance value of the switch-on resistor R2 is selected to be small, the purpose of reducing switch-on loss Eon is achieved, the resistance value of the switch-off resistor R3 is selected to be large, and the purpose of reducing switch-off Vce is achieved.

The invention discloses a direct-current power converter, a control method and a control device thereof, and a mobile power supply, and relates to the technical field of mobile power supplies. The method comprises the following steps: acquiring output power; when the output power is greater than a preset first power threshold, controlling the switching device to work according to a preset first switching frequency; and when the output power is less than or equal to a preset second power threshold, controlling the switching device to work according to a preset second switching frequency. According to the invention, the output power is monitored in real time, and the switching frequency is adaptively switched according to the output power, so that efficiency optimization in a full-load range is realized. During high-power output, a high first switching frequency is adopted, transient response is optimized, and miniaturization of passive elements is facilitated; and when low-power output is carried out, the low second switching frequency is automatically switched, so that the switching loss which is dominant at the moment is reduced, and the transmission efficiency during low-power working is improved.

The application discloses a low dropout linear regulator circuit which is mutually started with a bandgap reference circuit, and comprises a pre-starting circuit, an operational amplifier, a first NMOS transistor, and a bandgap reference circuit; the same-phase input end of the operational amplifier is connected with the output end of the pre-starting circuit; the gate of the first NMOS transistor is connected with the output end of the operational amplifier, and the source thereof is communicated with the input end of the bandgap reference circuit, so that an initial output voltage is generated to pre-start the bandgap reference circuit; the output end of the bandgap reference circuit is communicated with the pre-starting circuit, and after pre-starting, the LDO circuit is restarted to obtain a final output voltage, and the mutual starting of the LDO circuit and the bandgap reference circuit is realized. The application solves the problems that the traditional LDO circuit cannot provide stable bias current by itself, and the load capacity and transient response performance of the traditional bandgap reference type LDO circuit are poor, adopts a special mutual starting mechanism, simplifies the pre-starting and shutdown mechanism, improves the load capacity and transient response performance of the LDO circuit, guarantees the stable output voltage, and ensures the normal work of other modules of the system.

The application provides a multi-loop low-dropout linear voltage regulator with fast transient response and high power supply rejection, which comprises a main feedback loop, an adaptive ripple elimination loop and a current feedback loop; the main feedback loop comprises a differential circuit, a summing circuit and a buffer; the adaptive ripple elimination loop comprises a first current detection circuit and an adaptive auxiliary amplifier, the first current detection circuit detects an output current to adjust the gain of the adaptive auxiliary amplifier; the current feedback loop comprises a second current detection circuit, a current mirror, a transistor MN11 and a capacitor C1; the application adopts a multi-loop design and comprehensively considers the transient response characteristics and the power supply rejection ratio of the linear voltage regulator; compared with a conventional low-dropout linear voltage regulator, the voltage regulator of the application is improved in the transient response and the power supply rejection ratio, has wider applicability and further improves the performance of a power supply module.