8results 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 application discloses a BOOST internal ripple compensation circuit based on COT control and relates to the field of power supply design.The BOOST internal ripple compensation circuit comprises a conduction time control module TON, a driving module Driver, a ripple injection circuit and a comparator COMP; when the conduction time control module TON is in a conduction state, the comparator COMP is used for performing ripple compensation on the square wave generated by the ripple injection circuit, so that the BOOST system is guaranteed to be stable.The application does not need an equivalent resistor in series with an output capacitor, the ripple compensation is performed by the internal ripple injection circuit, the ripple of the output voltage is greatly reduced, meanwhile, the problem that the change trend of the ripple of the output capacitor is inconsistent with the change trend of the inductor current ripple is solved by the ripple injection circuit, the transient response is enhanced, compared with the traditional RC filter which needs a large capacitor and a resistor, the application only needs to select a small capacitor and a resistor to realize the ripple compensation, and the area of a chip is reduced.

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.

This invention discloses a common-secondary combined four-phase toroidal TLVR inductor, assembled from prefabricated pairs of primary magnetic cores, secondary magnetic cores, a single secondary coil, and four primary coils. The secondary magnetic core has two T-shaped second slots formed by a central strip-shaped rib and four corner bosses. The secondary coils are located within these T-shaped second slots and are open-looped around the strip-shaped rib. Every two primary coils are joined together within one T-shaped second slot, with a portion of their middle sections parallel and abutting the secondary coils. The primary magnetic core covers both coils and is flush with the edges of the secondary magnetic core, forming a single, integrally solidified unit. A set of secondary electrode pads is formed on the bottom of one side of the package for the secondary coils, and four sets of primary electrode pads are formed on the top of each side of the package and the bottom of its adjacent right side for the primary coils. This inductor helps reduce space requirements and improves the transient response of inductors. The coupling coefficient between any two phases of the TLVR is less than 0.1, further improving the circuit's operating environment.

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.

This invention discloses a four-phase toroidal TLVR inductor, assembled from prefabricated pairs of primary and secondary magnetic cores and four sets of primary and secondary coils. The secondary magnetic core has four corner-shaped second slots separated by a central cross-shaped rib. The primary and secondary coils overlap in their respective middle sections, and any two coils in each set are sequentially embedded in the second slots with the primary coil on top and the secondary coil on the bottom. The primary magnetic core covers the middle section of the primary coil and is flush with the secondary magnetic core, forming a single, integral solidification. Four sets of circumferentially distributed secondary electrode pads are formed on the bottom of the package, and four sets of primary electrode pads are formed on the top of each side of the package and the bottom of its adjacent right side. This inductor helps maintain a stable package structure and reduces space requirements, while also improving the transient response of the inductor. The coupling coefficient between any two phases of the TLVR is less than 0.1, further improving the circuit's operating environment.