Solar control circuit with low standby power consumption

Abstract

A solar lawn lamp control circuit with low standby power consumption comprises a control chip for controlling the low standby power consumption with low standby power consumption, a switch, an inductor, a rechargeable battery, a solar panel and an output capacitor. The solar LED lawn lamp has the advantages that the solar LED lawn lamp is low in standby power consumption under the condition that the solar LED lawn lamp is normally used and the electric quantity of the battery is lower than under-voltage locking by switching on and switching off the switch, and long-time standby can be achieved; when the solar LED lawn lamp is not used for a long time, extremely low standby power consumption can be realized, and meanwhile, the normal charging function is not influenced. When the support battery voltage is lower than an undervoltage locking threshold value, even if the battery voltage of the light-operated end is lower than a light-operated enabling threshold value, the pull-down resistor of the light-operated pin does not form a discharge loop; a switch is connected in series between the inductor and the LX end of the switch port of the control chip for controlling the low standby consumption, so long-time standby can be realized, and meanwhile, the charging performance of the solar panel to the rechargeable battery is not influenced.

Description

Technical field[0001]The invention belongs to the technical field of lighting circuits, and relates to a solar control circuit with low standby power consumption.Background technique[0002]In recent years, the control chips and solutions for controlling the low standby power consumption of solar lawn lights have been extensively developed and applied, realizing the use of multiple functions and taking into account the environmental protection at the same time, and are applied to various environments and occasions.[0003]Seefigure 1 withfigure 2 ,figure 1 Shown is a schematic diagram of a lawn lamp control circuit in the prior art.figure 2 Shown is a schematic diagram of the discharge circuit of the solar lawn lamp control circuit in the prior art in standby. Such asfigure 1 As shown, the control chip 11 (shown by the dashed box) for controlling the low standby consumption has 5 ports, the SOL end, the BAT end, the LX end, the output end VOUT, and the ground end GND. Wherein, the anode...

AI Technical Summary

Problems solved by technology

In order to disconnect this discharge loop and solve the long-time standby problem, the industry can usually add a switch 12, and choose to disconnect the switch 12 between the ground terminal GND and the ground of the control chip 11 that controls the low standby consumption, but in this way , when the SOL voltage is higher than BAT, the charging circuit as image 3 As shown, since the ground terminal GND of the control chip controlling the low standby consumption is floating, the channel of the charging PMOS tube is turned off with high resistance, and the charging path is connected by the solar panel 17 from the charging SOL port to the charging PMOS tube 22. High resistance channel to BAT port, resulting in very weak charging capability

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