Two-color LED light circuit and a LED light control circuit
View Patent ↗The present disclosure provides a two-color LED light circuit and an LED light control circuit, including an LED light switch control module configured for connecting with a switch signal chip and an LED light assembly, an overcurrent protection module connected with the LED light switch control module and configured for detecting overcurrent of the LED light assembly and disconnecting current of the LED light switch control module, an overtemperature protection module connected with the LED light switch control module and configured for detecting overtemperature of the LED light control circuit and disconnecting current of the LED light switch control module, and an under-voltage protection module connected with an LED light assembly voltage input and the LED light switch control module, configured for detecting an input voltage of the LED light assembly and disconnecting the current of the LED light switch control module when the input voltage is too low.
1. An LED light control circuit, comprising:
an LED light switch control module, configured for connecting with a switch signal chip and an LED light assembly, so that a switch signal output by the switch signal chip controlling the LED light assembly to turn on and off;
an overcurrent protection module connected with the LED light switch control module and configured for detecting overcurrent of the LED light assembly and disconnecting current of the LED light switch control module, so that the LED light assembly being turned off by the LED light switch control module;
an overtemperature protection module connected with the LED light switch control module and configured for detecting overtemperature of the LED light control circuit and disconnecting current of the LED light switch control module, so that the LED light assembly being turned off by the LED light switch control module; and
an under-voltage protection module connected with an LED light assembly voltage input and the LED light switch control module, configured for detecting an input voltage of the LED light assembly and disconnecting current of the LED light switch control module when the input voltage is too low, so that the LED light assembly being turned off by the LED light switch control module.
2. The LED light control circuit according to claim 1 , the LED light switch control module comprising a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, and a sixth switch tube, wherein
the LED light assembly comprises a voltage input, the voltage input further comprises a first voltage input and a second voltage input;
one end of the first switch tube and one end of the third switch tube are connected in series through a first series connection end, and the first series connection end is connected with the first voltage input, while another end of the first switch tube is connected with the voltage input, and another end of the third switch tube is grounded;
one end of the second switch tube and one end of the fourth switch tube are connected in series through a second series connection end, and the second series connection end is connected with the second voltage input, while another end of the second switch tube is connected with the voltage input, and another end of the fourth switch tube is grounded;
the fifth switch tube comprises an input end, an output end, and a control end;
the input end of the fifth switch tube is connected with a control end of the first switch tube, the output end of the fifth switch tube is connected with a control end of the fourth switch tube, the control end of the fifth switch tube is connected with a first output end of switch signal of the switch signal chip;
the sixth switch tube comprises an input end, an output end, and a control end;
the input end of the sixth switch tube is connected with a control end of the second switch tube, the output end of the sixth switch tube is connected with a control end of the third switch tube, the control end of the sixth switch tube is connected with a second output end of switch signal of the switch signal chip.
3. The LED light control circuit according to claim 2 , the LED light switch control module further comprising a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor,
the first switch tube is connected with the input end of the fifth switch tube through the first resistor, the second switch tube is connected with the input end of the sixth switch tube through the second resistor;
one end of the third resistor is connected with the control end of the fifth switch tube, another end of the third resistor is grounded; one end of the fourth resistor is connected with the control end of the sixth switch tube, another end of the fourth resistor is grounded; one end of the fifth resistor is connected with the control end of the third switch tube, another end of the fifth resistor is grounded; one end of the sixth switch tube is connected with the control end of the fourth switch tube, another end of the sixth resistor is grounded.
4. The LED light control circuit according to claim 2 , wherein the overcurrent protection module comprises a first comparator, an overcurrent protection resistor, and a seventh switch tube,
the first comparator includes a positive input end, a negative input end, and an output end, the seventh switch tube includes an input end, an output end, and a control end,
the positive input end of the first comparator is connected with the voltage reference input end, the negative input end of the first comparator is connected with one end of the overcurrent protection resistor, another end of the overcurrent protection resistor is connected with another end of the fourth switch tube and another end of the third switch tube, another end of the overcurrent protection resistor is grounded, the output end of the first comparator is connected with the control end of the seventh switch tube,
the input end of the seventh switch tube is connected with the first output end of switch signal and the second output end of switch signal, the output end of the seventh switch tube is grounded.
5. The LED light control circuit according to claim 4 , wherein the overtemperature protection module comprises a thermistor and a second comparator,
the second comparator includes a positive input end, a negative input end, and an output end,
one end of the thermistor is connected with the voltage reference input end, another end of the thermistor is connected with the negative input end of the second comparator, the positive input end of the second comparator is connected with the voltage reference input end, the output end of the second comparator is connected with the control end of the seventh switch tube.
6. The LED light control circuit according to claim 5 , wherein the under-voltage protection module comprises an undervoltage resistor and a third comparator,
the third comparator includes a positive input end, a negative input end, and an output end,
one end of the undervoltage resistor is connected with the voltage input end of the LED light assembly, another end of the undervoltage resistor is connected with the positive end of the third comparator, the negative end of the third comparator is connected with the voltage reference input end, the output end of the third comparator is connected with the control end of the seventh switch tube.
7. A two-color LED light circuit, comprising a switch signal chip, an LED light assembly, and an LED light control circuit according to claim 1 , wherein the LED light control circuit comprises:
an LED light switch control module, configured for connecting with the switch signal chip and the LED light assembly, so that a switch signal output by the switch signal chip controlling the LED light assembly to turn on and off;
an overcurrent protection module connected with the LED light switch control module and configured for detecting overcurrent of the LED light assembly and disconnecting current of the LED light switch control module, so that the LED light assembly being turned off by the LED light switch control module;
an overtemperature protection module connected with the LED light switch control module and configured for detecting overtemperature of the LED light control circuit and disconnecting current of the LED light switch control module, so that the LED light assembly is turned off by the LED light switch control module; and
an under-voltage protection module connected with an LED light assembly voltage input and the LED light switch control module, configured for detecting an input voltage of the LED light assembly and disconnecting current of the LED light switch control module when the input voltage is too low, so that the LED light assembly is turned off by the LED light switch control module.
8. The two-color LED light circuit according to claim 7 , the LED light switch control module comprising a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, and a sixth switch tube, wherein
the LED light assembly comprises a voltage input, the voltage input further comprises a first voltage input and a second voltage input;
one end of the first switch tube and one end of the third switch tube are connected in series through a first series connection end, and the first series connection end is connected with the first voltage input, while another end of the first switch tube is connected with the voltage input, and another end of the third switch tube is grounded;
one end of the second switch tube and one end of the fourth switch tube are connected in series through a second series connection end, and the second series connection end is connected with the second voltage input, while another end of the second switch tube is connected with the voltage input, and another end of the fourth switch tube is grounded;
the fifth switch tube comprises an input end, an output end, and a control end;
the input end of the fifth switch tube is connected with a control end of the first switch tube, the output end of the fifth switch tube is connected with a control end of the fourth switch tube, the control end of the fifth switch tube is connected with a first output end of switch signal of the switch signal chip;
the sixth switch tube comprises an input end, an output end, and a control end;
the input end of the sixth switch tube is connected with a control end of the second switch tube, the output end of the sixth switch tube is connected with a control end of the third switch tube, the control end of the sixth switch tube is connected with a second output end of switch signal of the switch signal chip.
9. The two-color LED light circuit according to claim 8 , wherein the LED light switch control module further comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor,
the first switch tube is connected with the input end of the fifth switch tube through the first resistor, the second switch tube is connected with the input end of the sixth switch tube through the second resistor;
one end of the third resistor is connected with the control end of the fifth switch tube, another end of the third resistor is grounded; one end of the fourth resistor is connected with the control end of the sixth switch tube, another end of the fourth resistor is grounded; one end of the fifth resistor is connected with the control end of the third switch tube, another end of the fifth resistor is grounded; one end of the sixth switch tube is connected with the control end of the fourth switch tube, another end of the sixth resistor is grounded.
10. The two-color LED light circuit according to claim 9 , wherein the overcurrent protection module comprises a first comparator, an overcurrent protection resistor, and a seventh switch tube,
the first comparator includes a positive input end, a negative input end, and an output end, the seventh switch tube includes an input end, an output end, and a control end,
the positive input end of the first comparator is connected with the voltage reference input end, the negative input end of the first comparator is connected with one end of the overcurrent protection resistor, another end of the overcurrent protection resistor is connected with another end of the fourth switch tube and another end of the third switch tube, another end of the overcurrent protection resistor is grounded, the output end of the first comparator is connected with the control end of the seventh switch tube,
the input end of the seventh switch tube is connected with the first output end of switch signal and the second output end of switch signal, the output end of the seventh switch tube is grounded.
11. The two-color LED light circuit according to claim 10 , wherein the overtemperature protection module comprises a thermistor and a second comparator,
the second comparator includes a positive input end, a negative input end, and an output end,
one end of the thermistor is connected with the voltage reference input end, another end of the thermistor is connected with the negative input end of the second comparator, the positive input end of the second comparator is connected with the voltage reference input end, the output end of the second comparator is connected with the control end of the seventh switch tube.
12. The two-color LED light circuit according to claim 11 , wherein the under-voltage protection module comprises an undervoltage resistor and a third comparator,
the third comparator includes a positive input end, a negative input end, and an output end,
one end of the undervoltage resistor is connected with the voltage input end of the LED light assembly, another end of the undervoltage resistor is connected with the positive end of the third comparator, the negative end of the third comparator is connected with the voltage reference input end, the output end of the third comparator is connected with the control end of the seventh switch tube.
13. The two-color LED light circuit according to claim 8 , wherein a first switch signal output by the first output end of switch signal of the switch signal chip is a high electrical level signal, a PWM signal, or no signal, a second switch signal output by the second output end of switch signal of the switch signal chip is a high electrical level signal, a PWM signal, or no signal.
14. The two-color LED light circuit according to claim 7 , wherein the LED light assembly comprises a voltage input, the voltage input further comprises a first voltage input and a second voltage input,
the LED light assembly further comprises a first LED light and a second LED light, a positive end of the first LED light is connected with the first voltage input, a negative end of the first LED light is connected with the second voltage input, a positive end of the second LED light is connected with the second voltage input, a negative end of the second LED light is connected with the first voltage input.
15. The two-color LED light circuit according to claim 14 , wherein the first LED light comprises at least one LED light connected in series, and the second LED light comprises at least one LED light connected in series,
a positive end of a series of the at least one first LED light is connected with the first voltage input, a negative end of the series of the at least one first LED light is connected with the second voltage input,
a positive end of a series of the at least one second LED light is connected with the second voltage input, a negative end of the series of the at least one second LED light is connected with the first voltage input.