CN112271792B - Solar control circuit with low standby power consumption - Google Patents

Solar control circuit with low standby power consumption Download PDF

Info

Publication number
CN112271792B
CN112271792B CN202011246044.4A CN202011246044A CN112271792B CN 112271792 B CN112271792 B CN 112271792B CN 202011246044 A CN202011246044 A CN 202011246044A CN 112271792 B CN112271792 B CN 112271792B
Authority
CN
China
Prior art keywords
module
low standby
charging
bat
sol
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011246044.4A
Other languages
Chinese (zh)
Other versions
CN112271792A (en
Inventor
班福奎
杨增卓
高峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Shiningic Electronic Technology Co ltd
Original Assignee
Shanghai Shiningic Electronic Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Shiningic Electronic Technology Co ltd filed Critical Shanghai Shiningic Electronic Technology Co ltd
Priority to CN202011246044.4A priority Critical patent/CN112271792B/en
Publication of CN112271792A publication Critical patent/CN112271792A/en
Application granted granted Critical
Publication of CN112271792B publication Critical patent/CN112271792B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A solar lawn lamp control circuit with low standby power consumption, comprising: low standby consumption control the control chip with low standby consumption, and switch, inductor, rechargeable battery, solar panel and output capacitor. The solar lawn lamp is closed through the switch, and the solar lawn lamp is supported to have the characteristics of low standby power consumption when the battery power is lower than the under-voltage locking under the normal use condition, so that long-time standby can be realized; the solar lawn lamp can realize extremely low standby power consumption when not used for a long time, and the normal charging function is not influenced. When the voltage of the supporting battery is lower than the undervoltage locking threshold value, even if the voltage of the battery at the light-operated end is lower than the light-operated enabling threshold value, a discharge loop is not formed by the pull-down resistor of the light-operated foot; the switch is connected in series with the inductance and the control chip switch port LX end for controlling the low standby consumption, so that the solar panel can stand by for a long time, and meanwhile, the charging performance of the solar panel on the rechargeable battery is not affected.

Description

Solar control circuit with low standby power consumption
Technical Field
The invention belongs to the technical field of lighting circuits, and relates to a solar control circuit with low standby power consumption.
Background
In recent years, the control chip and the scheme for controlling the low standby consumption of the solar lawn lamp have been widely developed and applied, realize the use of multiple functions and simultaneously realize the environmental protection, and are applied to various environments and occasions.
Referring to fig. 1 and 2, fig. 1 is a schematic diagram of a lawn lamp control circuit in the prior art. Fig. 2 is a schematic diagram of a discharging circuit of a solar lawn lamp control circuit in the prior art during standby. As shown in fig. 1, the control chip 11 (shown by a dotted line box) for controlling the low standby consumption has 5 ports, namely, SOL, BAT, LX, VOUT and GND. Wherein, the anode of the solar panel 17 is connected with the port SOL end of the control chip 11 for controlling the low standby consumption, and the cathode of the solar panel 17 is connected with the ground; the anode of the rechargeable battery 14 is connected to the BAT port of the control chip 11 for controlling the low standby consumption, and the cathode is connected to the ground; the inductor 13 is connected between BAT and LX ports of the control chip for controlling the low standby consumption; the output capacitor 15 is connected between the output end VOUT of the control chip 11 for controlling the low standby consumption and the ground; the anode of the solar lawn lamp 16 is connected to the output end VOUT end of the control chip 11 for controlling the low standby consumption, and the cathode is connected to the ground; the switch 12 is connected between the ground GND of the control chip 11 for controlling the low standby power consumption and the ground.
More specifically, the control chip 11 for controlling the low standby consumption may include: the control and drive module 21, the charging PMOS tube 22, the switch NMOS tube 23, the freewheel PMOS tube 24 and the pull-down resistor 25 of the SOL port; the substrates of the charge PMOS transistor 22 and the freewheel PMOS transistor 24 are connected to the output terminal VOUT. The working power supply of the control and driving module 21 is the output terminal VOUT, and the pull-down resistor 25 is used to eliminate the light-operated interference of weak light to the SOL pin.
Still further, the control and driving module 21 includes: a pulse frequency modulator 31, a comparison and logic module 32 and a driving module 33.
When the voltage of the SOL terminal is higher than 0.4V, the control and drive module 21 outputs a low-level signal to the grid electrode of the switch NMOS tube 23 to turn off the channel of the switch NMOS tube, and outputs a low-level signal to the grid electrode of the freewheel PMOS tube 24 to turn on the channel of the switch NMOS tube; when the voltage of the SOL terminal is lower than 0.4V and the BAT is higher than the undervoltage locking threshold value of 0.9V, the control and drive module 21 outputs a pulse frequency modulation signal to the grid electrode of the switch NMOS tube 23 to switch the switch NMOS tube, and outputs the pulse frequency modulation signal to the grid electrode of the freewheel PMOS tube 24 to switch the switch NMOS tube 23 and the freewheel PMOS tube 24 to be turned on and off in a reciprocal way, so that the boost of the rechargeable battery 14 to the output terminal VOUT terminal through the inductor 13 and the freewheel PMOS tube 24 is realized, and the voltage rises to the conduction of the solar lawn lamp 16 and reaches balance.
The voltage of the rechargeable battery 14 is typically 1.2V, when the voltage is discharged to a low voltage, BAT is less than 0.9V and SOL is less than 0.4V, the channel of the freewheeling PMOS is turned off, the output end VOUT is lower than BAT by one diode drop value, the gate of the charging PMOS 22 cannot be pulled up to the BAT voltage, the voltage of the charging PMOS 22 is lower than BAT by one diode drop value, the charging PMOS 22 is turned on, the rechargeable battery 14 has a discharging current loop from the ground to the pull-down resistor 25 through the channel of the charging PMOS 22, and the common value of the pull-down resistor 25 is 25K ohms, so the discharging loop is about 36uA, the standby power consumption is larger, and the long-time standby of the battery is not facilitated.
Referring to fig. 3, fig. 3 is a schematic diagram of a charging circuit of a solar lawn lamp control circuit in the prior art during standby. In order to break the discharging loop and solve the long-time standby problem, the industry may generally add a switch 12 and choose to break the switch 12 between the ground GND of the control chip 11 with low standby consumption and the ground, but in this way, when the SOL voltage is higher than BAT, the charging loop is as shown in fig. 3, since the ground GND of the control chip with low standby consumption is floating, the channel of the charging PMOS is turned off with high resistance, and the charging path from the solar panel 17 to the BAT port via the high-resistance channel of the charging PMOS 22 is very weak.
Disclosure of Invention
In order to solve the technical problems, the invention provides a novel solar lawn lamp control circuit with low standby power consumption and a novel solar lawn lamp control method, which support that a pull-down resistor of a light control foot does not form a discharge loop even if the battery voltage at a light control end is lower than a light control enabling threshold value when the battery voltage is lower than an undervoltage locking threshold value; the switch is connected in series with the inductance and the control chip switch port LX end for controlling the low standby consumption, so that the solar panel can stand by for a long time, and meanwhile, the charging performance of the solar panel on the rechargeable battery is not affected.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
A solar lawn lamp control circuit with low standby power consumption, comprising: the control chip is used for controlling the low standby consumption, and comprises an inductor, a rechargeable battery, a solar panel and an output capacitor; the lawn lamp is connected between the output end VOUT and the ground end GND; the control chip with low standby consumption comprises an SOL end, a BAT end, an LX end, an output end VOUT and a ground end GND; wherein,
The LX end of the control chip with low standby consumption is connected to one end of the inductor, the other end of the inductor is connected to the BAT end of the control chip with low standby consumption, the BAT end is also connected to the positive electrode of the rechargeable battery, and the negative electrode of the rechargeable battery is connected to the ground; the SOL end of the control chip with low standby consumption is connected to the anode of the solar panel, and the cathode of the solar panel is connected to the ground; the VOUT end of the control chip with low standby consumption is connected to the positive electrode of the output capacitor and the anode of the solar lawn lamp, and the negative electrode of the output capacitor and the cathode of the solar lawn lamp are connected to the ground; the GND end of the control chip with low standby consumption is connected to the ground;
The control chip with low standby consumption comprises a charging module, a boosting module, a bias current module, an undervoltage locking module and a pull-down resistor, wherein the charging module is used for entering a charging mode after detecting that the SOL end and the BAT end of the control chip with low standby consumption meet charging conditions; the input end of the charging module is connected with the SOL end, and the output end of the charging module is connected with the BAT and the input end VSUB of the bias current module; the input end of the boosting module is connected with an enable EN end, an SOL end and an LX end, the output end of the boosting module is connected with an output end VOUT, and the boosting module is used for entering a boosting mode after boosting conditions are met and adjusting the switching frequency according to the voltages of the LX end and the VOUT end of the control chip with low standby consumption; the bias current module is configured to generate bias current, and the under-voltage locking module is configured to detect that a working power supply of the under-voltage locking module 204 is VOUT when a BAT terminal under-voltage or VOUT terminal voltage of the control chip with low standby consumption is lower than the BAT terminal; the pull-down resistor is connected in series between the SOL and the ground end GND; the charging condition of the charging module is that the working power supply is the SOL end and the BAT end with higher voltage value, and the boosting condition is when the BAT end of the control chip with low standby consumption is under-voltage locked or the SOL end is enabled by light control.
Further, the charging module comprises a substrate selection module, a comparator and a charging P pipe; the input end of the substrate selection module is connected with the SOL end and the BAT end, and the output end of the substrate selection module is connected with the input end VSUB of the bias current module; the input end of the comparator is connected with the SOL end and the BAT end, and the output end of the comparator is connected with the grid electrode of the charging P tube 22; the substrate of the charging P-tube is connected to the input terminal VSUB of the bias current module, the source of the charging P-tube is connected to SOL, and the drain of the charging P-tube is connected to BAT terminal.
Further, the bias current module provides working tail current for the charging module, the boosting module, the bias current module and the undervoltage locking module, a working power supply of the bias current module is an output signal VSUB of the substrate selection module, and the signal VSUB is a signal output by a voltage-higher one of the SOL end and the BAT end of the control chip with low standby consumption.
Further, the boosting module comprises a logic and driving module, a pulse frequency modulation module, a switch N tube and a follow current P tube; the input end of the logic and driving module is connected with an enable EN end, an SOL end and the output end of the pulse frequency modulation module, and the output end of the logic and driving module is connected to a switch N pipe and a follow current P pipe; the source electrode and the substrate of the switch N tube are connected to the ground GND end, and the drain electrode of the switch N tube is connected to the LX end; the source electrode and the substrate of the free-wheeling P tube are connected to the output end VOUT, and the drain electrode of the free-wheeling P tube is connected to the LX end.
Further, when the under-voltage locking module detects that the BAT end of the chip is under-voltage or the voltage of the VOUT end is lower than the BAT end, the follow current P tube is normally turned on, and meanwhile the switch N tube is turned off.
Further, the solar control circuit with low standby power consumption further comprises a switch, wherein the LX end of the control chip with low standby power consumption is connected to one end of the switch, and the other end of the switch is connected to one end of the inductor; when the switch is turned off, the voltage at the output terminal VOUT is zero.
According to the technical scheme, the solar control circuit with low standby power consumption can effectively solve the problem that the solar lawn lamp can be standby for a long time, and meanwhile, the scheme of charging performance of the solar panel on the rechargeable battery is not influenced.
Drawings
FIG. 1 is a schematic diagram of a prior art lawn lamp control circuit
FIG. 2 is a schematic diagram of a discharging circuit of a solar lawn lamp control circuit in the prior art during standby
Fig. 3 is a schematic diagram of a charging loop of a solar lawn lamp control circuit in the prior art during standby
Fig. 4 is a schematic diagram of a solar lawn lamp control circuit with low standby power consumption in an embodiment of the invention
FIG. 5 is a schematic diagram of a charging loop for charging with low standby power consumption when the switch is turned off according to an embodiment of the invention
Description of element reference numerals
11. Control chip in the prior art
12. Switch
13. Inductance
14. Rechargeable battery
15. Output capacitor
16. Solar lawn lamp
17. Solar panel
21. Prior art control and drive modules
22. Charging P-tube
23. Switch N pipe
24. Follow current P pipe
25. Pull-down resistor
31. Pulse frequency modulation module
32. Comparison and logic module
33. Driving module
101. The control chip with low standby power consumption of the invention
201. Charging module
202. Boost module
203. Bias current module
204. Under-voltage locking module
301. Comparator with a comparator circuit
302. Substrate selection module
401. Logic and driving module
402. Pulse frequency modulation module
Detailed Description
The following describes embodiments of the present invention in further detail with reference to FIGS. 1-5.
It should be noted that, the solar control circuit with low standby power consumption of the present invention realizes the scheme that the solar lawn lamp can stand by for a long time without affecting the charging performance of the rechargeable battery by the solar panel, and the two schemes are realized by a switch connected in series between the LX end of the control chip with low standby power consumption and the inductor, namely:
① . Under the condition that the switch is closed, the solar lawn lamp has the characteristics of low standby power consumption when the battery power is lower than the undervoltage locking under the normal use condition, and can realize long-time standby.
Specifically, a solar lawn lamp control circuit of low standby power consumption, characterized by comprising: the control chip is used for controlling the low standby consumption, and comprises an inductor, a rechargeable battery, a solar panel and an output capacitor; the lawn lamp is connected between the output end VOUT and the ground end GND; the control chip with low standby consumption comprises an SOL end, a BAT end, an LX end, an output end VOUT and a ground end GND; wherein,
The LX end of the control chip with low standby consumption is connected to one end of the inductor, the other end of the inductor is connected to the BAT end of the control chip with low standby consumption, the BAT end is also connected to the positive electrode of the rechargeable battery, and the negative electrode of the rechargeable battery is connected to the ground; the SOL end of the control chip with low standby consumption is connected to the anode of the solar panel, and the cathode of the solar panel is connected to the ground; the VOUT end of the control chip with low standby consumption is connected to the positive electrode of the output capacitor and the anode of the solar lawn lamp, and the negative electrode of the output capacitor and the cathode of the solar lawn lamp are connected to the ground; the GND end of the control chip with low standby consumption is connected to the ground;
the control chip with low standby consumption comprises a charging module, a boosting module, a bias current module, an undervoltage locking module and a pull-down resistor, wherein the charging module is used for entering a charging mode after detecting that the SOL end and the BAT end of the control chip with low standby consumption meet charging conditions; the input end of the charging module is connected with the SOL end, and the output end of the charging module is connected with the BAT and the input end VSUB of the bias current module; the input end of the boosting module is connected with an enable EN end, an SOL end and an LX end, the output end of the boosting module is connected with an output end VOUT, and the boosting module is used for entering a boosting mode after boosting conditions are met and adjusting the switching frequency according to the voltages of the LX end and the VOUT end of the control chip with low standby consumption; the bias current module is used for generating bias current, the undervoltage locking module is used for detecting that when the BAT end undervoltage or the VOUT end voltage of the control chip with low standby consumption is lower than the BAT end, the working power supply of the undervoltage locking module is VOUT; the pull-down resistor is connected in series between the SOL and the ground end GND; the charging condition of the charging module is that the working power supply is the SOL end and the BAT end with higher voltage value, and the boosting condition is when the BAT end of the control chip with low standby consumption is under-voltage locked or the SOL end is enabled by light control.
② . Under the condition that a switch is disconnected, namely when the solar lawn lamp is not used for a long time, a switch is connected in series between an inductor and a switch pin of the control chip LX for controlling the low standby consumption and is opened, so that extremely low standby power consumption can be realized, and the normal charging function is not influenced.
The working principle of the solar lawn lamp control circuit with low standby power consumption is described below through an embodiment.
Referring to fig. 4, fig. 4 is a schematic diagram of a solar lawn lamp control circuit with low standby power consumption according to an embodiment of the invention. As shown in fig. 4, the solar lawn lamp control circuit with low standby power consumption includes a control chip 101, a switch 12, an inductor 13, a rechargeable battery 14, an output capacitor 15, a solar lawn lamp 16, and a solar panel 17; the LX end of the chip 101 is connected to the switch 12, the other end of the switch 12 is connected to the inductor 13, the other end of the inductor 13 is connected to the BAT end of the chip 101, the BAT end is also connected to the positive electrode of the rechargeable battery 14, and the negative electrode of the rechargeable battery 14 is connected to the ground; the SOL end of the chip 101 is connected to the anode of the solar panel 17, and the cathode of the solar panel 17 is connected to ground; the VOUT end of the chip 101 is connected to the positive electrode of the output capacitor 15 and the anode of the solar lawn lamp 16, and the negative electrode of the output capacitor 15 and the cathode of the solar lawn lamp 16 are connected to the ground; the GND terminal of the chip 101 is connected to ground.
The chip 101 includes: charging module 201, boosting module 202, bias current module 203, under-voltage locking module 204, pull-down resistor 25; the 5 ports are SOL, BAT, LX, VOUT and GND; the input signal of the charging module 201 is SOL, and the output signals are BAT and VSUB; the input signals of the boost module 202 are EN, SOL and LX, and the output signal is VOUT; pull-down resistor 25 is connected in series between SOL and GND.
More specifically, the charging module 201 includes: a comparator 301, a substrate selection module 302, and a charging P-pipe 22; the input signals of the substrate selection module 302 are SOL and BAT, and the output signal is VSUB; the input signals of the comparator 301 are SOL and BAT, and the output signal is connected to the grid electrode of the charging P-tube 22; the substrate of the charging P-pipe 22 is connected to the VSUB signal, the source is connected to the SOL, and the drain is connected to the BAT.
The charging module 201 is configured to enter a charging mode after detecting that the SOL and BAT ports of the chip 101 meet charging conditions; the working power supply of the charging module 201 is the one with higher voltage value in the SOL and BAT ports.
More specifically, the boost module 202 includes: logic and driving module 401, pulse frequency modulation module 402, switch N tube 23, freewheel P tube 24; the input signals of the logic and driving module 401 are the output signals of the EN, SOL and pulse frequency modulation module 402, and the output signal of the logic and driving module 401 is connected to the switch N tube 23 and the follow current P tube 24; the source and substrate of the switch N-pipe 23 are connected to GND, and the drain is connected to LX; the source electrode and the substrate of the follow current P pipe are connected to VOUT, and the drain electrode is connected to LX;
The boost module 202 is configured to enter a boost mode after a boost condition is satisfied, and adjust a switching frequency according to voltages of LX and VOUT ports of the chip 101 to implement boost output; when the BAT port of the chip 101 is under-voltage locked or the SOL port is enabled by light control, the freewheel P tube 24 between the LX port and the VOUT port is always on; the operating power of the boost module 202 is VOUT.
The bias current module 203 is configured to generate bias current and provide working tail current for other modules; the working power supply of the bias current module 203 is the output signal VSUB of the substrate selection module 302, i.e. the voltage of the SOL and BAT ports of the chip 101 is high;
The under-voltage locking module 204 is configured to detect that a BAT port of the chip 101 is under-voltage or a VOUT terminal voltage is lower than the BAT terminal, and always turns on the flywheel P-tube 24, and simultaneously turns off the switch N-tube 23; the operating power of the undervoltage lockout module 204 is VOUT.
As shown in fig. 4, when the switch 12 is always closed or the inductor is directly connected to the BAT and LX ports of the chip 101, when the voltage at the SOL terminal is higher than 0.4V, the boost module 202 outputs a low level signal to the gate of the switch N-tube 23 to turn off the same, and outputs a low level signal to the gate of the freewheel P-tube 24 to turn on the same; when the voltage of the SOL end is lower than 0.4V and the BAT is higher than the undervoltage locking threshold value of 0.9V, the logic and driving module 401 outputs a pulse frequency modulation signal to the grid electrode of the switch N tube 23 to switch the switch N tube, and outputs the pulse frequency modulation signal to the grid electrode of the follow current P tube to switch the switch N tube 23 and the follow current P tube 24 to be turned on and off reciprocally, so that the voltage of the rechargeable battery 14 is boosted to the VOUT end through the inductor 13 and the follow current P tube 24, and the voltage is boosted to the conduction of the solar lawn lamp 16 and balanced; the rechargeable battery 14 is a nickel-metal hydride battery, the voltage is typically 1.2V, when the voltage is discharged to a lower voltage value, BAT is less than 0.9V and SOL is less than 0.4V, the working power supply of the charging module 201 is selected as BAT voltage by the substrate selection module 302, the grid electrode of the charging P-tube 22 is pulled up to the BAT voltage value, the charging P-tube is turned off, the rechargeable battery 14 is connected to the ground through the charging P-tube 22 and the pull-down resistor 25 without a discharging current loop, meanwhile, the freewheeling P-tube 24 is turned on, VOUT is equal to the BAT voltage value, the working power supply VOUT of the boosting module 202 is equal to the BAT voltage value, no switching frequency without boosting, VOUT is lower than the LED on voltage, low standby power consumption is realized, and the connected battery can stand by for a long time.
Referring to fig. 5, fig. 5 is a schematic diagram of a charging loop for charging with low standby power consumption when the switch is turned off in the embodiment of the invention. As shown in fig. 5, when only charging is needed and no lighting function is needed, even when the battery is connected and no lighting is needed for a long time, a switch 12 is connected in series between the inductor 13 and the LX port of the chip 101, so that VOUT voltage is zero, in this case, only the charging module 201 and the bias current module 203 operate, standby power consumption is extremely low, and when SOL voltage is higher than BAT, the charging circuit is as shown in fig. 5, the channel of the charging P-pipe 22 is conductive, the charging circuit is normally operated from the SOL port of the chip 101 to the BAT port of the chip 101 via the conductive channel of the charging P-pipe 22 by the solar panel 17.
In summary, the power supply switching circuit can effectively solve the problem encountered by similar products in the market, not only expands the width in application scenes, but also reduces the power consumption of the control chip with low standby consumption.
The foregoing description is only of the preferred embodiments of the present invention, and the embodiments are not intended to limit the scope of the invention, so that all changes made in the equivalent structures of the present invention described in the specification and the drawings are included in the scope of the invention.

Claims (4)

1. The utility model provides a solar energy lawn lamp control circuit of low stand-by power consumption which characterized in that includes: the control chip is used for controlling the low standby consumption, and comprises an inductor, a rechargeable battery, a solar panel and an output capacitor; the solar lawn lamp is connected between the output end VOUT and the ground end GND; the control chip with low standby consumption comprises an SOL end, a BAT end, an LX end, an output end VOUT and a ground end GND; wherein,
The LX end of the control chip with low standby consumption is connected to one end of the inductor, the other end of the inductor is connected to the BAT end of the control chip with low standby consumption, the BAT end is also connected to the positive electrode of the rechargeable battery, and the negative electrode of the rechargeable battery is connected to the ground; the SOL end of the control chip with low standby consumption is connected to the anode of the solar panel, and the cathode of the solar panel is connected to the ground; the VOUT end of the control chip with low standby consumption is connected to the positive electrode of the output capacitor and the anode of the solar lawn lamp, and the negative electrode of the output capacitor and the cathode of the solar lawn lamp are connected to the ground; the GND end of the control chip with low standby consumption is connected to the ground;
The control chip with low standby consumption comprises a charging module, a boosting module, a bias current module, an undervoltage locking module and a pull-down resistor, wherein the charging module is used for entering a charging mode after detecting that the SOL end and the BAT end of the control chip with low standby consumption meet charging conditions; the input end of the charging module is connected with the SOL end, and the output end of the charging module is connected with the BAT and the input end VSUB of the bias current module; the input end of the boosting module is connected with an enable EN end, an SOL end and an LX end, the output end of the boosting module is connected with an output end VOUT, and the boosting module is used for entering a boosting mode after boosting conditions are met and adjusting the switching frequency according to the voltages of the LX end and the VOUT end of the control chip with low standby consumption; the bias current module is used for generating bias current, the undervoltage locking module is used for detecting that when the BAT end undervoltage or the VOUT end voltage of the control chip with low standby consumption is lower than the BAT end, the working power supply of the undervoltage locking module is VOUT; the pull-down resistor is connected in series between the SOL and the ground end GND; the charging condition of the charging module is that the working power supply is the SOL end and the BAT port with higher voltage values, and the boosting condition is when the BAT end of the control chip with low standby consumption is under-voltage locked or the SOL port is enabled by light control; the charging module comprises a substrate selection module, a comparator and a charging P pipe; the input end of the substrate selection module is connected with the SOL end and the BAT end, and the output end of the substrate selection module is connected with the input end VSUB of the bias current module; the input end of the comparator is connected with the SOL end and the BAT end, and the output end of the comparator is connected with the grid electrode of the charging P pipe; the substrate of the charging P tube is connected to the input end VSUB of the bias current module, the source electrode of the charging P tube is connected to the SOL, and the drain electrode of the charging P tube is connected to the BAT end;
The boosting module comprises a logic and driving module, a pulse frequency modulation module, a switch N tube and a follow current P tube; the input end of the logic and driving module is connected with an enable EN end, an SOL end and the output end of the pulse frequency modulation module, and the output end of the logic and driving module is connected to a switch N pipe and a follow current P pipe; the source electrode and the substrate of the switch N tube are connected to the ground GND end, and the drain electrode of the switch N tube is connected to the LX end; the source electrode and the substrate of the free-wheeling P tube are connected to the output end VOUT, and the drain electrode of the free-wheeling P tube is connected to the LX end.
2. The low standby power consumption solar control circuit of claim 1; the low standby power supply control circuit is characterized in that the bias current module provides working tail current for the charging module, the boosting module, the bias current module and the undervoltage locking module, a working power supply of the bias current module is an output signal VSUB of the substrate selection module, and the signal VSUB is a signal output by a SOL end and a BAT end of the low standby power supply control chip.
3. The low standby power consumption solar control circuit of claim 2; the under-voltage locking module is characterized in that when the under-voltage of the BAT end or the voltage of the VOUT end of the detection chip is lower than the BAT end, the follow current P tube is normally turned on, and meanwhile, the switch N tube is turned off.
4. A low standby power consumption solar control circuit according to any of claims 1-3, further comprising a switch, wherein the LX end of the low standby power consumption control chip is connected to one end of the switch, and the other end of the switch is connected to one end of the inductor; when the switch is turned off, the voltage at the output terminal VOUT is zero.
CN202011246044.4A 2020-11-10 2020-11-10 Solar control circuit with low standby power consumption Active CN112271792B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011246044.4A CN112271792B (en) 2020-11-10 2020-11-10 Solar control circuit with low standby power consumption

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011246044.4A CN112271792B (en) 2020-11-10 2020-11-10 Solar control circuit with low standby power consumption

Publications (2)

Publication Number Publication Date
CN112271792A CN112271792A (en) 2021-01-26
CN112271792B true CN112271792B (en) 2024-06-07

Family

ID=74339740

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011246044.4A Active CN112271792B (en) 2020-11-10 2020-11-10 Solar control circuit with low standby power consumption

Country Status (1)

Country Link
CN (1) CN112271792B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2612203Y (en) * 2003-03-25 2004-04-14 无锡尚德太阳能电力有限公司 Control circuit of solar lawn lamp
WO2015010475A1 (en) * 2013-07-25 2015-01-29 深圳市明微电子股份有限公司 Switch power supply driving chip and switch power supply driving circuit
CN207219123U (en) * 2017-09-27 2018-04-10 上海裕芯电子科技有限公司 A kind of light-operated boosting LED function circuit of solar energy
CN208170248U (en) * 2018-05-23 2018-11-30 汪彬 Lamp for lawn
CN110446301A (en) * 2019-08-09 2019-11-12 上海裕芯电子科技有限公司 A kind of light-operated boosting LED function circuit of solar energy
CN111884323A (en) * 2020-07-31 2020-11-03 上海裕芯电子科技有限公司 Low-power consumption solar light-operated boost circuit
CN214100893U (en) * 2020-11-10 2021-08-31 上海裕芯电子科技有限公司 Solar lawn lamp control circuit with low standby power consumption

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2612203Y (en) * 2003-03-25 2004-04-14 无锡尚德太阳能电力有限公司 Control circuit of solar lawn lamp
WO2015010475A1 (en) * 2013-07-25 2015-01-29 深圳市明微电子股份有限公司 Switch power supply driving chip and switch power supply driving circuit
CN207219123U (en) * 2017-09-27 2018-04-10 上海裕芯电子科技有限公司 A kind of light-operated boosting LED function circuit of solar energy
CN208170248U (en) * 2018-05-23 2018-11-30 汪彬 Lamp for lawn
CN110446301A (en) * 2019-08-09 2019-11-12 上海裕芯电子科技有限公司 A kind of light-operated boosting LED function circuit of solar energy
CN111884323A (en) * 2020-07-31 2020-11-03 上海裕芯电子科技有限公司 Low-power consumption solar light-operated boost circuit
CN214100893U (en) * 2020-11-10 2021-08-31 上海裕芯电子科技有限公司 Solar lawn lamp control circuit with low standby power consumption

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
一种低压太阳能LED草坪灯驱动控制集成电路设计;凌朝东;杨静;梁爱梅;黄炜炜;;电路与***学报;20110415(第02期);全文 *

Also Published As

Publication number Publication date
CN112271792A (en) 2021-01-26

Similar Documents

Publication Publication Date Title
KR101631502B1 (en) Method of forming a control circuit and device
CN102255526B (en) AC-DC power supply conversion chip and power switching circuit
CN101841242A (en) Switch power supply and method for adjusting output current thereof
CN112615425B (en) Detection control circuit
CN110855151B (en) Positive and negative excitation type switching power supply circuit and control method thereof
CN214100893U (en) Solar lawn lamp control circuit with low standby power consumption
CN112805587B (en) Laser emission circuit and laser radar
CN114865905A (en) High-voltage started switch power supply
CN208656639U (en) Control circuit and switch converters for switch converters
CN104427721A (en) Led drive circuit
CN116915169B (en) Photovoltaic cell bypass circuit
CN109756116A (en) Boost chip and its short-circuit protection circuit
WO2021258366A1 (en) Control circuit, battery management system and electrochemical device
CN111030481B (en) Constant-voltage constant-current flyback AC-DC converter without auxiliary winding and control circuit thereof
CN112271792B (en) Solar control circuit with low standby power consumption
CN102123553B (en) COT mode LED lighting driving circuit
CN109470908B (en) Peak current detection method of CS-free sampling resistor
CN101877206A (en) Power supply apparatus and method for AMOLED
CN113489126B (en) High-efficient milliwatt level photovoltaic energy collection control circuit
CN110446301A (en) A kind of light-operated boosting LED function circuit of solar energy
CN114050710B (en) Switching power supply circuit
CN116191627A (en) Charger power supply circuit
CN101868079B (en) Overall monitoring high-voltage and constant-current driving device for driving high-power light-emitting diode (LED)
CN111883085B (en) Device for improving stable work of liquid crystal equipment
CN112542939B (en) Primary side feedback synchronous response circuit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant