Driving circuit
A driving circuit is provided in this present disclosure, the driving circuit includes a voltage input module, a quick start module and a control module. The voltage input module includes a first input terminal and a second input terminal and is configured to receive an alternating current voltage and convert the alternating current voltage into a direct current voltage. The quick start module is coupled to the voltage input module and configured to receive the direct current voltage and convert the direct current voltage into a startup voltage. The control module is coupled to the quick start module and configured to receive the startup voltage and control a load, wherein the quick start module comprises a first resistor and a second resistor connected in series and is coupled between the first input terminal and the control module.
1. A driving circuit comprising:
a voltage input module comprising a first input terminal and a second input terminal, the voltage input module configured to receive an alternating current voltage and convert the alternating current voltage into a direct current voltage;
a quick start module coupled to the voltage input module and configured to receive the direct current voltage and convert the direct current voltage into a startup voltage; and
a control module coupled to the quick start module and configured to receive the startup voltage and control a load;
wherein the quick start module comprises a first resistor and a second resistor of the quick start module connected in series are coupled between the first input terminal and the control module, and a voltage regulating switch connected in parallel with one of the first resistor and the second resistor, when the alternating current voltage is within a threshold range, the voltage regulating switch is turned on to short-circuit the first resistor or the second resistor connected in parallel therewith, thereby increasing the startup voltage and speeding up a startup speed of the control module, and wherein a base of the voltage regulating switch is coupled to a first Zener diode and an emitter of the voltage regulating switch is coupled to a second Zener diode, the second Zener diode being connected in parallel with a capacitor, wherein a voltage regulation value of the second Zener diode is greater than a voltage regulation value of the first Zener diode.
2. The driving circuit according to claim 1 , wherein the voltage input module ( 110 ) comprises a rectifier module and a filter module.
3. The driving circuit according to claim 2 , wherein the voltage regulating switch comprises a transistor or a metal-oxide semiconductor field effect transistor (MOSFET).
4. The driving circuit according to claim 1 , wherein the threshold range of the alternating current voltage is from 277 volts to 480 volts.
5. The driving circuit according to claim 1 , further comprising a voltage control module coupled to the voltage input module and configured to control turned-on and turned-off of the regulating voltage based on a voltage value of the alternating current voltage.
6. The driving circuit according to claim 5 , wherein the threshold range of the alternating current voltage is from 250 volts to 300 volts.
7. The driving circuit according to claim 6 , wherein the voltage control module comprises a control switch, when the alternating current voltage is within the threshold range, the control switch is turned off, and the voltage regulating switch is controlled to be turned on.
8. The driving circuit according to claim 6 , wherein the voltage control module comprises a control switch, when the alternating current voltage is larger than a maximum valve of the threshold range, the control switch is turned on, and the voltage regulating switch is controlled to be turned off.
9. A driving circuit comprising:
a voltage input module comprising a first input terminal and a second input terminal, the voltage input module configured to receive an alternating current voltage and convert the alternating current voltage into a direct current voltage;
a quick start module coupled to the voltage input module and configured to receive the direct current voltage and convert the direct current voltage into a startup voltage;
a control module coupled to the quick start module and configured to receive the startup voltage and control a load; and
a high-frequency power supply module configured to supply high-frequency power to the control module after the control module is activated, one end of the high-frequency power supply module coupled to the second input terminal, and the other end of high-frequency power supply module coupled to the control module;
wherein the quick start module comprises a first resistor and a second resistor of the quick start module connected in series are coupled between the first input terminal and the control module, and a voltage regulating switch connected in parallel with one of the first resistor and the second resistor, when the alternating current voltage is within a threshold range, the voltage regulating switch is turned on to short-circuit the first resistor or the second resistor connected in parallel therewith, thereby increasing the startup voltage and speeding up a startup speed of the control module.
10. The driving circuit according to claim 9 , wherein when the high-frequency power supply module starts to supply high-frequency power to the control module, the voltage regulating switch turns off to re-access the first resistor or the second resistor connected in parallel therewith in the quick start module.