42results about How to "Stable charging current" patented technology

The invention discloses a new energy and electric power matched city electricity-saving lighting device. The new energy and electric power matched city electricity-saving lighting device comprises a hollow stand column, a camera and a vibrating sensor are arranged at the middle portion of the hollow stand column, and a box door is arranged at the upper portion of the hollow stand column; a controller is arranged inside the box door of the hollow stand column, a rain sheltering top cover is arranged at the top of the hollow stand column, and solar panels are paved at the upper portion of the rain sheltering top cover; a stand column is arranged at the center position of the upper portion of the rain sheltering top cover, a wind power generation device is arranged on the stand column, and an illuminance sensor is arranged at the top end of the stand column; and a set of outer lighting lamp and inner light lamp are arranged at the lower portion of the rain sheltering top cover. By means of the new energy and electric power matched city electricity-saving lighting device, automatic lighting can be achieved, automatic lighting and automatic lighting brightness adjustment can be carried out according to practical situations, and the functions of lighting and rain sheltering are achieved; and meanwhile, the remote warning function is achieved, use is safe and reliable, two kinds of new energy including the solar energy and the wind energy can be used, and electricity saving and environmental protection are achieved.

The invention discloses a medium-power and low-cost charge pump charging method, and an SC8551 or lower-cost similar charge pump framework high-voltage direct charging chip is utilized to be matched with a charging head which is commonly used in the market at present, is very low in cost and has a 200mV first-gear voltage regulation range to realize the low-power high-voltage direct charging of about 20W-30W. U1 is an SC8551 or Shanghai southchip same-series charge pump high-voltage direct charging chip, the USB interface voltage, namely VAC, can be detected in real time, when the voltage of the VAC is higher than the required working voltage, the conduction state of Q1 is controlled through an OVP_GATE signal, and the VBUS is clamped within the required voltage range. Q1 is an NMOS transistor and cooperates with U1 to perform overvoltage protection of a USB interface, and Q1 is controlled by U1 to realize the isolation of 200mV change of each gear of the low-cost USB input voltage. According to the invention, the cost and the charging efficiency can be well balanced, and the charging method has great advantages in an interval of about 20-30 watts such that the charging method hasvery high practical value and promotional value.

The invention discloses a solar cell charger which comprises a solar cell array, a storage battery, two charging circuits and at least one charging part. The charging part is provided with a positive pole output end and a negative pole output end, wherein the positive pole output end and the negative pole output end are respectively used for connecting a positive pole and a negative pole of an external battery to be charged. The charging circuits comprises rectifying circuits, output indicating circuits, charging indicating circuits, charging fully indicating circuits, amplification circuits, bleeder circuits, voltage stabilizing circuits and integration op-amp chips LM324. According to the solar cell charger, electricity can be stored to keep charging currents to be stable in the charging process, charging to a battery can be still carried out when lights are weak, or solar power does not exist, and multiple indicating lights are arranged, various indicating states can be indicated, thus the solar cell charger has good market application prospects. In addition, the solar cell charger is low in cost, high in benefit, high in practical value and further capable of designing and forming a solar charging demonstration instrument which is used for teaching demonstration and has good teaching demonstration effects.

The invention discloses a controllable self-clamping SensorFET composite vertical power device, which belongs to the technical field of semiconductor power devices and power integrated circuits. In the device, a main switch tube of a power inverter and a SensorFET device are integrated on the same P-type substrate and have a shared anode (or shared metal anode) structure, wherein a clamping diodestring is arranged between a control electrode and the shared anode of the SensorFET device; and the main switch tube of the power inverter can be a vertical metal oxide semiconductor (MOS) compositedevice or the normal vertical MOS device. The controllable self-clamping SensorFET composite vertical power device provided by the invention can effectively discharge snow slide energy while providing a stable charge current for an internal circuit, so that a transient safe operating area of the SensorFET device is expanded. Moreover, the energy discharging amount and clamping time are controlledby connecting a clamping tube and a control grid area, so that the application of an intelligent power integrated circuit (IC) to a high-snow slide energy environment, such as an ignition area, is expanded.

The invention discloses a high-voltage pulse capacitor constant current charging device and method; the device comprises an energy storage module and a discharge control module; the energy storage module comprises a plurality of energy storage units; the discharge control module comprises discharge control units matched with the energy storage units; the energy storage module serves as a power supply charging a load, and the discharge control units connect in series with the energy storage units back to a charging loop, thus realizing constant current charging for the load. The method monitors a charging current, and the energy storage units are connected in series through the discharge control module, thus accurately controlling the load charging voltage, and keeping the constant charging current. The energy storage units serve as the charging power supply of the load, thus solving the problems of high capacity requirement of a power grid access point in the prior art that the charging power is directly from the power grid; the charging control module controls an output of the energy storage module, thus realizing low voltage input and high voltage output without needing a transformer.

The invention discloses a starting circuit of a PWM chip of an ultra-wide voltage auxiliary power supply, which comprises a voltage switch circuit, a voltage detection circuit and a charging circuit; the voltage switch circuit is composed of a MOS transistor Q1, a resistor R4 and a resistor R5; the voltage detection circuit consists of The MOS transistor Q2, the resistor R7 and the resistor R8 are composed; the charging circuit is composed of the resistor R1 and the resistor R2. The start-up circuit of the ultra-wide voltage auxiliary power supply PWM chip, no matter how the input voltage changes, the charging current of the PWM chip VCC is stable, and the relative change is small; when the power supply fails, the chip can restart and will not enter In the locked state, after troubleshooting, it can be restarted without power-off and restart, especially when working under ultra-high voltage, the circuit loss is much smaller than that of conventional circuits.