CN215912251U - Low-power-consumption stroboflash-free induction LED lamp control circuit and LED lamp - Google Patents
Low-power-consumption stroboflash-free induction LED lamp control circuit and LED lamp Download PDFInfo
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- CN215912251U CN215912251U CN202121827983.8U CN202121827983U CN215912251U CN 215912251 U CN215912251 U CN 215912251U CN 202121827983 U CN202121827983 U CN 202121827983U CN 215912251 U CN215912251 U CN 215912251U
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Abstract
The utility model discloses a low-power-consumption stroboflash-free induction LED lamp control circuit and an LED lamp, and the low-power-consumption stroboflash-free induction LED lamp control circuit comprises an input rectifying module, an isolation driving module, an induction module, a switch module, a stroboflash removing circuit module and an LED module, wherein the isolation driving module comprises an isolation power supply unit and a driving control unit, the output end of the input rectifying module is connected with the isolation power supply unit, the isolation power supply unit is respectively connected with the power supply end of the driving control unit, the power supply end of the stroboflash removing circuit module and the input end of the LED module, the output end of the LED module is grounded through the stroboflash removing circuit module, the output end of the induction module is connected with the control end of the switch module, and the induction module is used for controlling the on-off of the switch module according to an acquired induction signal; the isolation driving module is further connected with a switch module, and the switch module is used for controlling the state of the isolation power supply unit for supplying power to the LED module according to the on-off state of the switch module, so that the on-off of the LED module is controlled.
Description
Technical Field
The utility model belongs to the technical field of LED lamp circuits, relates to a low-power-consumption stroboflash-free induction LED lamp control circuit, and further relates to an LED lamp using the circuit.
Background
The LED is a common lighting component in home and industry at present, is driven by constant current or constant current pulse, has the advantages of energy conservation, high efficiency and longer service life compared with the traditional fluorescent lamp, and is widely used.
However, due to its characteristics, when the voltage is fluctuated, the linear driving circuit may cause stroboflash, which may cause problems of headache, eyestrain, and visual deterioration for human body. Therefore, when the traditional induction lamp is used for an LED light source, the circuit is complex, the standby power consumption is large, the stroboscopic problem also exists, and the user experience is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a low-power-consumption stroboflash-free induction LED lamp control circuit and an LED lamp, and solves the problems of complex circuit, high standby power consumption and stroboflash.
The utility model adopts the technical scheme that the low-power-consumption stroboflash-free induction LED lamp control circuit comprises an input rectifying module, an isolation driving module, an induction module, a switch module, a stroboflash removing circuit module and an LED module, wherein the isolation driving module comprises an isolation power supply unit and a driving control unit, the output end of the input rectifying module is connected with the isolation power supply unit, the isolation power supply unit is respectively connected with the power supply end of the driving control unit, the power supply end of the stroboflash removing circuit module and the input end of the LED module, the output end of the LED module is grounded through the stroboflash removing circuit module, the output end of the induction module is connected with the control end of the switch module, and the induction module is used for controlling the on-off of the switch module according to an acquired induction signal; the isolation driving module is further connected with the switch module, and the switch module is used for controlling the state of the isolation power supply unit for supplying power to the LED module according to the on-off state of the switch module, so that the on-off of the LED module is controlled.
The driving end of the driving control unit is connected with the control end of the isolation power supply unit, the input end of the switch module is connected with the auxiliary power supply end of the isolation power supply unit, and the output end of the switch module is connected with the signal detection end of the driving control unit; or the like, or, alternatively,
the driving end of the driving control unit is connected with the control end of the isolation power supply unit through the input end and the output end of the switch module in sequence; or the like, or, alternatively,
the driving end of the driving control unit is respectively connected with the control end of the isolation power supply unit and the input end of the switch module, and the output end of the switch module is grounded; or the like, or, alternatively,
the driving end of the driving control unit is connected with the control end of the isolation power supply unit, and the output end of the isolation power supply unit is connected with the input end of the LED module through the input end and the output end of the switch module in sequence.
The switch module comprises an NPN triode, the base electrode of the NPN triode is the control end of the switch module, the collector electrode of the NPN triode is the input end of the switch module, and the emitter electrode of the NPN triode is the control end of the switch module; or the like, or, alternatively,
the switch module comprises an N-channel MOS tube, the grid electrode of the N-channel MOS tube is the control end of the switch module, the drain electrode of the N-channel MOS tube is the input end of the switch module, and the source electrode of the N-channel MOS tube is the output control end of the switch module.
The induction module comprises an induction unit and a voltage division unit, the output end of the induction unit is the output end of the induction module, the grounding end of the induction unit is grounded, and the power end of the induction unit is connected with the auxiliary power supply end of the isolation power supply unit, the output end of the isolation power supply unit or the output end of the input rectification module through the voltage division unit.
The voltage division unit comprises a pull-up resistor and a pull-down resistor, the power supply end of the sensing unit is grounded through the pull-down resistor, and the power supply end of the sensing unit is also connected with an auxiliary power supply end of the isolation power supply unit, the output end of the isolation power supply unit or the output end of the input rectification module through the pull-up resistor;
the induction module further comprises a voltage stabilizing unit, and a power supply end of the induction unit is grounded through the voltage stabilizing unit; the voltage stabilizing unit comprises a first voltage stabilizing diode, a power supply end of the induction unit is connected with a cathode of the first voltage stabilizing diode, and an anode of the first voltage stabilizing diode is grounded.
The isolation power supply unit comprises a transformer, a power supply subunit, an absorption circuit subunit, an output control subunit and an output rectification filter subunit, wherein the transformer comprises a primary winding, a secondary winding and an auxiliary winding, the first end of the primary winding is respectively connected with the output end of the input rectification module and one end of the absorption circuit subunit, the second end of the primary winding is respectively connected with the other end of the absorption circuit subunit and the input end of the output control subunit, the output end of the output control subunit is grounded, and the control end of the output control subunit is the control end of the isolation power supply unit; the first end of the auxiliary winding is an auxiliary power supply end of the isolation power supply unit, the first end of the auxiliary winding is further connected with the output end of the input rectification module and a power supply end of the drive control unit through the power supply electronic unit, and the second end of the auxiliary winding is grounded; the first end of the secondary winding is connected with the first end of the output rectifying and filtering subunit, the second end of the output rectifying and filtering unit is the output end of the isolation power supply unit, and the second end of the secondary winding is grounded;
the power supply electronic unit comprises a first resistor, a third resistor, a first diode and a second capacitor, wherein a first end of the auxiliary winding is connected with an anode of the first diode through the third resistor, a cathode of the first diode is respectively connected with one end of the first resistor, one end of the second capacitor and a power supply end of the driving control unit, the other end of the first resistor is connected with an output end of the input rectifying module, and the other end of the second capacitor is grounded; the absorption circuit subunit comprises a second resistor, a first capacitor and a second diode, wherein the first end of the primary winding is respectively connected with the other end of the first resistor, one end of the second resistor and one end of the first capacitor, the other end of the second resistor and the other end of the first capacitor are respectively connected with the cathode of the second diode, and the anode of the second diode is connected with the second end of the primary winding; the output control subunit comprises a first field effect transistor, a ninth resistor, a tenth resistor and an eleventh resistor, wherein a drain electrode of the first field effect transistor is connected with the second end of the primary winding, a source electrode of the first field effect transistor is respectively connected with one end of the tenth resistor and one end of the eleventh resistor, the other end of the eleventh resistor is grounded, a gate electrode of the first field effect transistor is respectively connected with one end of the ninth resistor and the other end of the tenth resistor, and the other end of the ninth resistor is a control end of the output control subunit; the output rectifying and filtering subunit comprises a third diode, a load resistor and a third filtering capacitor, the anode of the third diode is the first end of the output rectifying and filtering subunit, the cathode of the third diode is the second end of the output rectifying and filtering subunit, the cathode of the third diode is also respectively connected with one end of the load resistor and one end of the third filtering capacitor, and the second end of the secondary winding, the other end of the load resistor and the other end of the third filtering capacitor are grounded.
The driving control unit comprises a driving chip, a current sampling subunit, a compensation subunit and a zero current detection subunit, wherein an output current sampling end of the driving chip is connected with the output control subunit through the current sampling subunit, a grounding end of the driving chip is grounded, a loop compensation end of the driving chip is grounded through the compensation subunit, a driving end of the driving chip is a driving end of the driving control unit, a power supply end of the driving chip is a power supply end of the driving control unit, and an inductance zero current detection end of the driving chip is connected with a first end of the auxiliary winding or an output end of the switch module through the zero current detection subunit;
the current sampling subunit comprises a sampling resistor, and an output current sampling end of the driving chip is connected with one end of the tenth resistor or the other end of the ninth resistor through the sampling resistor; the compensation subunit comprises a compensation resistor and a compensation capacitor, and the loop compensation end of the driving chip is grounded through the compensation resistor and the compensation capacitor; the zero current detection subunit comprises a first detection resistor and a second detection resistor, the inductance zero current detection end of the driving chip is grounded through the first detection resistor, and is also connected with the first end of the auxiliary winding or the output end of the switch module through the second detection resistor.
The stroboscopic removing circuit module comprises a stroboscopic removing chip, a starting unit, a filtering protection unit, a limiting protection unit, an output driving unit and an output current regulating unit, the power supply end of the stroboscopic-removing chip is respectively connected with the output end of the isolation power supply unit and the ground through the starting unit, the grounding end of the stroboscopic removing chip is grounded, the filtering current end of the stroboscopic removing chip is grounded through the filtering protection unit, the protection end of the stroboscopic-removing chip is respectively connected with the input end of the output driving unit and the output end of the LED module through the limiting protection unit, the voltage output end of the stroboscopic removing chip is connected with the control end of the output driving unit, the current detection end of the stroboscopic removing chip is respectively connected with one end of the output current adjusting unit and the output end of the output driving unit, and the other end of the output current adjusting unit is grounded;
the starting unit comprises a thirteenth resistor and a fourth capacitor, the power supply end of the stroboscopic removing chip is connected with the output end of the isolation power supply unit through the thirteenth resistor, and the power supply end of the stroboscopic removing chip is grounded through the fourth capacitor; the filtering protection unit comprises a fifth capacitor, and a filtering current end of the stroboscopic-removing chip is grounded through the fifth capacitor; the limiting protection unit comprises a fourteenth resistor, the output driving unit comprises a second field effect transistor and a sixth capacitor, the protection end of the stroboflash removal chip is respectively connected with the drain electrode of the second field effect transistor and the output end of the LED module through the fourteenth resistor, the voltage output end of the stroboflash removal chip is respectively connected with the grid electrode of the second field effect transistor and one end of the sixth capacitor, and the other end of the sixth capacitor is grounded; the output current adjusting unit comprises a fifteenth resistor, the current detection end of the stroboscopic-removing chip is respectively connected with the source electrode of the second field-effect tube and one end of the fifteenth resistor, and the other end of the fifteenth resistor is grounded.
The input rectification module comprises an input protection unit, a rectification unit, an output filtering unit, a first power input end and a second power input end, wherein the first power input end and the second power input end are connected with an external power supply;
the input protection unit comprises a safety resistor and a piezoresistor, the rectifying unit comprises a rectifying bridge, the first power input end is respectively connected with the first input end of the rectifying bridge and one end of the piezoresistor through the safety resistor, and the second power input end is respectively connected with the other end of the piezoresistor and the second input end of the rectifying bridge; the output filter unit comprises a first inductor, a first filter capacitor and a second filter capacitor, the first end of the first inductor is the first end of the output filter unit, the second end of the first inductor is the second end of the output filter unit, the first output end of the rectifier bridge is respectively connected with the first end of the first inductor and one end of the first filter capacitor, the second end of the first inductor is connected with one end of the second filter capacitor, and the second output end of the rectifier bridge, the other end of the first filter capacitor and the other end of the second filter capacitor are grounded.
This embodiment still provides a LED lamps and lanterns, including lamp body and foretell low-power consumption no stroboscopic response LED lamp control circuit, low-power consumption no stroboscopic response LED lamp control circuit locates in the lamp body.
The utility model has the advantages that
Keep apart the power supply unit through setting up and supply power for drive control unit, remove stroboscopic circuit module and LED module, combine drive control unit and remove stroboscopic circuit module drive LED module, guaranteed that the circuit has high power factor to guaranteed to realize not having the stroboscopic, improved the stability of circuit, circuit structure is simple moreover. Specifically, a combination mode of a driving chip SY5830 and a stroboscopic removing chip DIO8221 is adopted, so that no stroboscopic effect is achieved, the percentage of flashing is less than 3%, and the light quality is improved. The driver chip may be replaced with CL1360, and the strobe-free chip may be replaced with JW 1221A.
The induction module is connected to the secondary output end of the isolation power supply unit, namely pull-up and pull-down resistors R4 and R5 are connected to the secondary output end of the transformer; or the sensing module is connected with the auxiliary winding of the isolated power supply unit, namely pull-up resistors R4 and R5 are connected with the auxiliary winding of the transformer. The induction module is powered by a secondary or auxiliary winding of the isolation power supply, so that the impact of input power grid surge on the induction module can be avoided, and the system reliability is improved; meanwhile, the false triggering caused by the interference of the power grid input ripple waves on the induction module is reduced.
The low power consumption can be realized by four connection modes controlled by the trigger switch module, so that the standby power consumption of the system is less than 0.5W, and the requirements of regulations are met.
The induction module is connected to the side of the auxiliary winding, the VSEN port of the drive control unit is controlled through the switch module, the output of the drive control unit is controlled, the output of the isolation power supply unit is controlled, the LED is controlled to be on or off, the stroboscopic-free circuit module and the LED lamp string are not operated in standby, and low power consumption in standby can be achieved;
the induction module is connected to the secondary output end, the on-off of an output branch of the isolated power supply unit is controlled through the switch module, the on-off of the LED is controlled, whether the LED works or not is controlled through controlling the input of the stroboscopic-removing circuit module, and the LED lamp string loop is disconnected in standby, so that low power consumption in standby can be realized;
the induction module is connected to the side of the auxiliary winding, the DRV port of the drive control unit is controlled to be connected with the MOS tube through the switch module to be switched on and off, the Q1 is controlled to be switched on and off, the secondary output of the isolation power supply unit is controlled to be controlled, the LED is controlled to be turned on and off, the stroboscopic circuit removing module and the LED lamp string are not operated during standby, and low standby power consumption can be realized;
the induction module is connected to the side of the auxiliary winding, the switch module controls a level signal output by a DRV port of the drive control unit U1 to control the connection and disconnection of the Q1, control the secondary output and control the on and off of the LED, and the stroboscopic removing circuit module and the LED lamp string are both idle in standby, so that low power consumption in standby can be realized. The switch module can comprise an NPN triode or an N-channel MOS tube.
Drawings
Fig. 1 is a schematic diagram of a low power consumption non-strobe induction LED lamp control circuit scheme 1;
fig. 2 is a schematic diagram of a low power consumption non-strobe induction LED lamp control circuit scheme 2;
fig. 3 is a schematic diagram of a low power consumption non-strobe sensing LED lamp control circuit scheme 3;
fig. 4 is a schematic diagram of a low power consumption non-strobe induction LED lamp control circuit scheme 4.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, a low-power-consumption stroboflash-free sensing LED lamp control circuit includes an input rectifying module, an isolation driving module, a sensing module, a switch module, a stroboflash-removing circuit module and an LED module, where the isolation driving module includes an isolation power unit and a driving control unit, an output end of the input rectifying module is connected to the isolation power unit, the isolation power unit is respectively connected to a power end of the driving control unit, a power end of the stroboflash-removing circuit module and an input end of the LED module, an output end of the LED module is grounded through the stroboflash-removing circuit module, an output end of the sensing module is connected to a control end of the switch module, and the sensing module is configured to control on/off of the switch module according to a collected sensing signal; the isolation driving module is further connected with the switch module, and the switch module is used for controlling the state of the isolation power supply unit for supplying power to the LED module according to the on-off state of the switch module, so that the on-off of the LED module is controlled.
It should be noted that, the input rectification module is used for converting the input alternating current into direct current and then supplying power to the isolation power supply unit in an adaptive manner, the isolation power supply unit is used for supplying power to the drive control unit, the stroboscopic removing circuit module and the LED module in an adaptive manner, and the isolation power supply unit is used for supplying power to the LED module in an adaptive manner, so that electrical isolation is realized, the interference of the power input side to the drive control unit, the stroboscopic removing circuit module and the LED module can be avoided, and the stability and the safety of the circuit are improved. Wherein, the state that isolation power supply unit supplied power to the LED module includes: the isolation power supply unit keeps a state of supplying power to the LED module, and the isolation power supply unit stops supplying power to the LED module. The stroboscopic removing circuit module is used for eliminating generated current ripples so as to enable the LED module to achieve stroboflash-free.
Specifically, the isolation driving module is further connected to the switch module, and the switch module is configured to control, according to an on-off state of the switch module, a state of the isolation power supply unit supplying power to the LED module, so as to control on and off of the LED module, including four implementation modes, specifically:
(1) the driving end of the driving control unit is connected with the control end of the isolation power supply unit, the input end of the switch module is connected with the auxiliary power supply end of the isolation power supply unit, and the output end of the switch module is connected with the signal detection end of the driving control unit, as shown in fig. 1. The sensing module triggers the on-off of the switch module to control the voltage signal detected by the signal detection end of the driving control unit, so that the output of the driving control unit is controlled, the output of the isolation power supply unit is further controlled, the state of the isolation power supply unit supplying power to the LED module can be controlled, and finally the LED module is controlled to be on or off.
(2) The driving end of the driving control unit is connected with the control end of the isolation power supply unit sequentially through the input end and the output end of the switch module, as shown in fig. 3. The induction module triggers the on-off of the switch module to control the transmission of a control signal output to the isolation power supply unit by the drive control unit, so that the output of the isolation power supply unit is controlled, the state of the isolation power supply unit supplying power to the LED module can be controlled, and finally the LED module is controlled to be on or off.
(3) The driving end of the driving control unit is respectively connected with the control end of the isolation power supply unit and the input end of the switch module, and the output end of the switch module is grounded, as shown in fig. 4. The induction module triggers the on-off of the switch module to control the transmission of a control signal output to the isolation power supply unit by the drive control unit, so that the output of the isolation power supply unit is controlled, the state of the isolation power supply unit supplying power to the LED module can be controlled, and finally the LED module is controlled to be on or off.
(4) The driving end of the driving control unit is connected with the control end of the isolation power supply unit, and the output end of the isolation power supply unit is connected with the input end of the LED module sequentially through the input end and the output end of the switch module, as shown in fig. 2. The induction module triggers the on-off of the switch module to control the on-off of the branch between the isolation power supply unit and the LED module, so that the state of the isolation power supply unit supplying power to the LED module is controlled, and finally the on-off of the LED module is controlled.
Further, the switch module comprises an NPN-type triode, a base of the NPN-type triode is a control terminal of the switch module, a collector of the NPN-type triode is an input terminal of the switch module, and an emitter of the NPN-type triode is a control terminal of the switch module; or the like, or, alternatively,
the switch module comprises an N-channel MOS tube, the grid electrode of the N-channel MOS tube is the control end of the switch module, the drain electrode of the N-channel MOS tube is the input end of the switch module, and the source electrode of the N-channel MOS tube is the output control end of the switch module. It should be noted that the switch module may also be implemented by using other switch devices, and this embodiment is not limited to this.
The input rectification module comprises an input protection unit, a rectification unit, an output filtering unit, a first power input end and a second power input end, wherein the first power input end and the second power input end are connected with an external power supply, the first power input end and the second power input end are respectively connected with one end of the input protection unit, the other end of the input protection unit passes through the rectification unit and is connected with the first end of the output filtering unit, and the second end of the output filtering unit is the output end of the input rectification module.
Specifically, the input protection unit comprises a safety resistor FR1 and a voltage dependent resistor VR1, the rectification unit comprises a rectification bridge BR1, the first power input terminal L is respectively connected with a first input terminal of the rectification bridge BR1 and one end of a voltage dependent resistor VR1 through the safety resistor FR1, and the second power input terminal N is respectively connected with the other end of the voltage dependent resistor VR1 and a second input terminal of the rectification bridge BR 1; the output filter unit comprises a first inductor L1, a first filter capacitor CE1 and a second filter capacitor CE2, the first end of the first inductor L1 is the first end of the output filter unit, the second end of the first inductor L1 is the second end of the output filter unit, the first output end of the rectifier bridge BR1 is connected with the first end of the first inductor L1 and the one end of the first filter capacitor CE1 respectively, the second end of the first inductor L1 is connected with one end of the second filter capacitor CE2, and the second output end of the rectifier bridge BR1, the other end of the first filter capacitor CE1 and the other end of the second filter capacitor CE2 are grounded. Wherein, CE1, CE2 and L1 form a filter to realize the filtering function; rectifier bridge BR1 is composed of four diodes, as shown in fig. 1; the fuse resistor FR1 and the voltage dependent resistor VR1 realize overcurrent and overvoltage protection.
The isolation power supply unit comprises a transformer T1, a power supply subunit, an absorption circuit subunit, an output control subunit and an output rectification filter subunit, wherein the transformer T1 comprises a primary winding NP, a secondary winding NS and an auxiliary winding NAUX, the first end of the primary winding NP is respectively connected with the output end of the input rectification module and one end of the absorption circuit subunit, the second end of the primary winding NP is respectively connected with the other end of the absorption circuit subunit and the input end of the output control subunit, the output end of the output control subunit is grounded, and the control end of the output control subunit is the control end of the isolation power supply unit; the first end of the auxiliary winding NAUX is an auxiliary power supply end of the isolation power supply unit, the first end of the auxiliary winding NAUX is also respectively connected with the output end of the input rectifying module and a power supply end of the drive control unit through the power supply electronic unit, and the second end of the auxiliary winding NAUX is grounded; the first end of the secondary winding NS is connected with the first end of the output rectifying and filtering subunit, the second end of the output rectifying and filtering unit is the output end of the isolation power supply unit, and the second end of the secondary winding NS is grounded.
Specifically, the power supply electronic unit comprises a first resistor R1, a third resistor R3, a first diode D1 and a second capacitor C2, a first end of the auxiliary winding NAUX is connected to an anode of the first diode D1 through the third resistor R3, a cathode of the first diode D1 is respectively connected to one end of the first resistor R1, one end of the second capacitor C2 and a power supply end of the drive control unit, the other end of the first resistor R1 is connected to an output end of the input rectification module, and the other end of the second capacitor C2 is grounded; the absorption circuit subunit comprises a second resistor R2, a first capacitor C1 and a second diode D2, wherein the first end of the primary winding NP is respectively connected with the other end of the first resistor R1, one end of the second resistor R2 and one end of the first capacitor C1, the other end of the second resistor R2 and the other end of the first capacitor C1 are respectively connected with the cathode of the second diode D2, and the anode of the second diode D2 is connected with the second end of the primary winding NP; the output control subunit comprises a first field effect transistor Q1, a ninth resistor R9, a tenth resistor R10 and an eleventh resistor R11, the drain of the first field effect transistor Q1 is connected with the second end of the primary winding NP, the source of the first field effect transistor Q1 is respectively connected with one end of the tenth resistor R10 and one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is grounded, the gate of the first field effect transistor Q1 is respectively connected with one end of the ninth resistor R9 and the other end of the tenth resistor, and the other end of the ninth resistor R9 is the control end of the output control subunit; the output rectifying and filtering subunit comprises a third diode D3, a load resistor R12 and a third filtering capacitor CE3, the anode of the third diode D3 is the first end of the output rectifying and filtering subunit, the cathode of the third diode D3 is the second end of the output rectifying and filtering subunit, the cathode of the third diode D3 is further respectively connected with one end of the load resistor R12 and one end of the third filtering capacitor CE3, and the second end of the secondary winding NS, the other end of the load resistor R12 and the other end of the third filtering capacitor CE3 are grounded. It should be noted that, the resistor R3 is connected to the resistor D1 and the resistor C2 to form a rectifying and filtering circuit, so that a more stable dc voltage can be obtained; d2, R2 and C1 form an RCD absorption circuit which is used for absorbing the spikes generated by T1 and Q1; and the load resistor R12 and the filter capacitor CE3 are used for filtering the output ripple.
The driving control unit comprises a driving chip U1, a current sampling subunit, a compensation subunit and a zero current detection subunit, wherein an output current sampling end ISEN of the driving chip U1 is connected with the output control subunit through the current sampling subunit, a ground end GND of the driving chip U1 is grounded, a loop compensation end COMP of the driving chip is grounded through the compensation subunit, a driving end DRV of the driving chip U1 is a driving end of the driving control unit, a power supply end VIN of the driving chip U1 is a power supply end of the driving control unit, and an inductance zero current detection end VSEN of the driving chip U1 is connected with a first end of the auxiliary winding NAUX or an output end of the switch module through the zero current detection subunit.
Specifically, the current sampling subunit includes a sampling resistor R8, and the output current sampling end ISEN of the driver chip U1 is connected to one end of the tenth resistor R10 or the other end of the ninth resistor R9 through the sampling resistor R8; the compensation subunit comprises a compensation resistor R6 and a compensation capacitor C3, and a loop compensation end COMP of the driving chip U1 is grounded through the compensation resistor R6 and the compensation capacitor C3; the zero current detection subunit comprises a first detection resistor R16 and a second detection resistor R7, and an inductance zero current detection end VSEN of the driving chip U1 is grounded through the first detection resistor R7; the inductance zero-current detection terminal VSEN of the driving chip U1 is further connected to the first terminal of the auxiliary winding NAUX through the second detection resistor R16, as shown in fig. 2-4, or the inductance zero-current detection terminal VSEN of the driving chip U1 is further connected to the output terminal of the switch module through the second detection resistor R16, as shown in fig. 1.
Wherein, the driving chip U1 preferably adopts an isolation switch power supply chip SY5830, the PF of which is greater than 0.9, although the driving chip of the embodiment may also adopt chips of other models; the VIN port of the isolation driving chip is connected with the input rectifying module through R1, and the COMP port is grounded after being connected with R6 and C3, so that the system stability is improved; the VSEN port can detect voltage change and adjust the output of the chip; the DRV port is connected with R9 and connected with the grid electrode of an N-channel MOS tube Q1, and the conduction and the disconnection of Q1 are controlled; the ISEN port connecting resistor R8 is connected with the source electrode of the MOS transistor Q1, the system power can be driven by adjusting the resistance value of the resistor R8, the system power passes through the R10 and then is connected with the grid electrode of the MOS transistor Q1, and the system power is grounded through the R11 resistor; the GND port is connected to ground.
The stroboscopic removing circuit module comprises a stroboscopic removing chip U2, a starting unit, a filtering protection unit, a limiting protection unit, an output driving unit and an output current adjusting unit, wherein a power supply end VIN of the stroboscopic removing chip U2 is respectively connected with an output end of the isolation power supply unit and the ground through the starting unit, a grounding end GND of the stroboscopic removing chip U2 is grounded, a filtering current end VC of the stroboscopic removing chip U2 is grounded through the filtering protection unit, a protection end VLMT of the stroboscopic removing chip U2 is respectively connected with an input end of the output driving unit and an output end of the LED module through the limiting protection unit, a voltage output end VG of the stroboscopic removing chip U2 is connected with a control end of the output driving unit, a current detection end VS of the stroboscopic removing chip U2 is respectively connected with one end of the output current adjusting unit and an output end of the output driving unit, the other end of the output current regulating unit is grounded.
Specifically, the starting unit comprises a thirteenth resistor R13 and a fourth capacitor C4, the supply terminal VIN of the stroboscopic-removing chip U2 is connected to the output terminal of the isolated power supply unit through the thirteenth resistor R13, and the supply terminal VIN of the stroboscopic-removing chip U2 is further grounded through the fourth capacitor C4; the filtering protection unit comprises a fifth capacitor C5, and a filtering current end VC of the stroboscopic-removing chip U2 is grounded through the fifth capacitor C5; the limiting protection unit comprises a fourteenth resistor R14, the output driving unit comprises a second field effect transistor Q2 and a sixth capacitor C6, the protection terminal VLMT of the stroboscopic removal chip U2 is respectively connected with the drain electrode of the second field effect transistor Q2 and the output end of the LED module through the fourteenth resistor R14, the voltage output terminal VG of the stroboscopic removal chip U2 is respectively connected with the gate electrode of the second field effect transistor Q2 and one end of the sixth capacitor C6, and the other end of the sixth capacitor C6 is grounded; the output current adjusting unit comprises a fifteenth resistor R15, the current detection end VS of the stroboscopic-removing chip U2 is respectively connected with the source electrode of the second field effect transistor Q2 and one end of the fifteenth resistor R15, and the other end of the fifteenth resistor R15 is grounded.
Preferably, the stroboscopic removal chip can be a DIO8221 chip, but is not limited thereto. And the switching power supply non-stroboscopic driving is realized by combining a driving chip SY5830 and a stroboscopic removing chip DIO 8221. In addition, through the stroboflash removing chip U2 and the second field effect transistor Q2, the generated current ripple can be effectively eliminated, and no stroboflash is realized; the voltage of the power supply terminal VIN can be clamped within a specified value range through the thirteenth resistor R13; the maximum value of the voltage connected with the LED module can be set through the fourteenth resistor R14, and the power consumption of the chip U2 can be limited.
The LED module comprises at least one light-emitting diode; when the LED module includes a plurality of light emitting diodes, the plurality of light emitting diodes are connected in parallel or in series.
The induction module comprises an induction unit J1 and a voltage division unit, wherein the output end OUT of the induction unit J1 is the output end of the induction module, the grounding end GND of the induction unit J1 is grounded, and the power end VCC of the induction unit J1 is connected with the auxiliary power supply end of the isolation power supply unit, the output end of the isolation power supply unit or the output end of the input rectification module through the voltage division unit. It should be noted that the sensing unit J1 can be powered by the input rectifying module, the auxiliary power supply terminal or the output terminal of the isolated power supply unit.
Specifically, the voltage dividing unit includes a pull-up resistor R4 and a pull-down resistor R5, the power supply terminal VCC of the sensing unit J1 is grounded through the pull-down resistor R5, and the power supply terminal VCC of the sensing unit J1 is further connected to the auxiliary power supply terminal of the isolated power supply unit, the output terminal of the isolated power supply unit, or the output terminal of the input rectifying module through the pull-up resistor R4. The power supply terminal VCC of the sensing unit J1 is further connected to the auxiliary power supply terminal of the isolated power supply unit, the output terminal of the isolated power supply unit, or the output terminal of the input rectification module through the pull-up resistor R4, specifically: the power supply terminal VCC of the sensing unit J1 is connected to the first terminal of the auxiliary winding of the transformer T1, the cathode of the third diode, or the second terminal of the first inductor L1 through the pull-up resistor R4.
Further, the sensing module further includes a voltage regulator, and the power supply terminal of the sensing unit J1 is further grounded through the voltage regulator. Specifically, the voltage stabilizing unit includes a first zener diode ZD1, the power supply terminal VCC of the sensing unit J1 is connected to the cathode of the first zener diode ZD1, and the anode of the first zener diode ZD1 is grounded. The supply voltage can be stabilized and then provided to the sensing unit J1 by the zener diode ZD1, so as to ensure stable operation of the sensing unit.
The sensing unit J1 in this example can be one of an infrared sensing module, a microwave sensing module, a light sensing module, or a sound and light control sensing module.
In addition, this embodiment still provides a lamps and lanterns, including lamp body and foretell low-power consumption no stroboscopic response LED lamp control circuit, this circuit is located in the lamp body.
Example 1
As shown in fig. 1, the sensing unit J1 is connected to the auxiliary winding side, the OUT port of the sensing unit J1 is connected to the base of the triode Q3, the collector of the triode Q3 is connected to the auxiliary winding, the emitter is grounded sequentially through R16 and R7, and is connected to the VSEN port of the driver chip U1 through R16, the voltage value detected by the VSEN port of the driver chip U1 is controlled through Q3, so as to control the output of the driver chip U1, further control the output of the secondary winding of the transformer T1, control the on and off of the LED, the stroboscopic-free circuit module U2 and the LED light string are both inactive during standby, and low power consumption in standby can be achieved. R4/R5 is an upper pull-down resistor, is connected with an auxiliary winding NAUX of the switching power supply and provides a direct-current working voltage of a VCC port for the induction unit J1; the voltage regulator ZD1 is connected to the VCC port of the sensing unit J1 to provide a stable dc voltage for the module. The high level of the OUT end of the induction unit J1 triggers the NPN triode Q3 to be conducted, the VSEN port of the driving chip U1 detects voltage through the resistors R16 and R7, the threshold value of the VSEN port is triggered, the driving chip U1 does not output, the first field effect transistor Q1 is cut off, the secondary winding of the transformer T1 does not output, the system does not run, the isolation power supply unit stops supplying power to the LED module, and the LED module is extinguished. Otherwise, the main driving constant current system works, the isolation power supply unit keeps supplying power to the LED module, and the LED module is lightened.
Example 2
As shown in fig. 2, the sensing unit J1 is connected to the secondary output end, the OUT port of the sensing unit J1 is connected to the base of the triode Q3, the collector of the Q3 is connected to the cathode of the secondary rectification D3, the emitter of the triode Q3 is connected to the input end of the LED module, the branch is controlled by the triode Q3 to turn on and off, so as to control the on and off of the LED, and the stroboscopic removing circuit module U2 is controlled to control whether the LED works, so that the LED light string loop is turned off during standby, and low power consumption in standby can be realized. The R4/R5 is a pull-up resistor connected to the secondary end of the switching power supply and provides a VCC port direct-current working voltage for the induction unit J1; the voltage regulator ZD1 is connected to the VCC port of the sensing unit to provide a stable dc voltage for the module. The OUT end of the induction unit J1 outputs high level to trigger the NPN triode Q3 to be conducted, the LED lamp bead string forms a loop, the LED lamp is on, otherwise, the lamp is not on.
Example 3
As shown in fig. 3, the sensing unit J1 is connected to the auxiliary winding side, the OUT port of the sensing unit J1 is connected to the base of the triode Q3, the collector of the Q3 is connected to the DRV port of the driving chip U1, the emitter of the Q3 is connected to the gate of the MOS transistor Q1 through R9, and by controlling the on and off of the Q3, the on and off of the DRV port of the driving chip U1 and the branch of the MOS transistor Q1 can be controlled, the operating state of the main driving constant current system is controlled, the LEDs are controlled to be turned on and off, and the stroboscopic removal circuit module U2 and the LED light string are both inactive during standby, so that standby low power consumption can be achieved. R4/R5 is an upper pull-down resistor, is connected with an auxiliary winding NAUX of the switching power supply and provides a direct-current working voltage of a VCC port for the induction unit J1; the voltage regulator ZD1 is connected to the VCC port of the sensing unit J1 to provide a stable dc voltage for the module. The high level output by the OUT end of the induction unit J1 triggers the NPN triode Q3 to be conducted, a control signal output by the DRV port of the driving chip U1 is transmitted to the MOS tube Q1 through the Q3, the conduction of the MOS tube Q1 is controlled, the secondary winding of the transformer T1 normally outputs, the system runs, the isolation power supply unit keeps supplying power to the LED module, and the LED module is lightened. Otherwise, the main driving constant-current system does not work, the isolation power supply unit stops supplying power to the LED module, and the LED module is extinguished.
Example 4
As shown in fig. 4, the sensing unit J1 is connected to the auxiliary winding side, the OUT port of the sensing unit J1 is connected to the base of the triode Q3, the collector of the Q3 is connected to the gate of the MOS transistor Q1, and is connected to the DRV port of the driver chip U1 via the R9, the emitter of the triode Q3 is grounded, and by controlling the on/off of the Q3, the transmission of the control signal output from the DRV port of the driver chip U1 is controlled, so as to control the on/off of the Q1, control the secondary output, control the on/off of the LED, and when in standby, both the stroboscopic-free circuit module U2 and the LED light string are not operated, so as to achieve low power consumption in standby. R4/R5 is an upper pull-down resistor, is connected with an auxiliary winding NAUX of the switching power supply and provides a direct-current working voltage of a VCC port for the induction unit J1; the ZD1 voltage regulator is connected to the VCC port of the sensing unit J1 to provide a stable DC voltage for the module. The high level output by the OUT end of the sensing unit J1 triggers the NPN transistor Q3 to conduct, and the control signal output by the DRV port of the driving chip U1 is continuously pulled low through the transistor Q3, so that the MOS transistor Q1 is not conducted, the secondary winding of the transformer T1 has no output, the system does not run, the isolation power supply unit stops supplying power to the LED module, and the LED module is extinguished. Otherwise, the main driving constant current system works, the isolation power supply unit keeps supplying power to the LED module, and the LED module is lightened.
The transistors Q3 in the above 4 embodiments can be replaced by N-channel MOS transistors.
Claims (10)
1. A low-power-consumption stroboflash-free induction LED lamp control circuit is characterized by comprising an input rectifying module, an isolation driving module, an induction module, a switch module, a stroboflash removing circuit module and an LED module, wherein the isolation driving module comprises an isolation power supply unit and a driving control unit, the output end of the input rectifying module is connected with the isolation power supply unit, the isolation power supply unit is respectively connected with the power supply end of the driving control unit, the power supply end of the stroboflash removing circuit module and the input end of the LED module, the output end of the LED module is grounded through the stroboflash removing circuit module, the output end of the induction module is connected with the control end of the switch module, and the induction module is used for controlling the on-off of the switch module according to an acquired induction signal; the isolation driving module is further connected with the switch module, and the switch module is used for controlling the state of the isolation power supply unit for supplying power to the LED module according to the on-off state of the switch module, so that the on-off of the LED module is controlled.
2. The LED lamp control circuit with low power consumption and no stroboscopic induction is characterized in that the driving end of the driving control unit is connected with the control end of the isolated power supply unit, the input end of the switch module is connected with the auxiliary power supply end of the isolated power supply unit, and the output end of the switch module is connected with the signal detection end of the driving control unit; or the like, or, alternatively,
the driving end of the driving control unit is connected with the control end of the isolation power supply unit through the input end and the output end of the switch module in sequence; or the like, or, alternatively,
the driving end of the driving control unit is respectively connected with the control end of the isolation power supply unit and the input end of the switch module, and the output end of the switch module is grounded; or the like, or, alternatively,
the driving end of the driving control unit is connected with the control end of the isolation power supply unit, and the output end of the isolation power supply unit is connected with the input end of the LED module through the input end and the output end of the switch module in sequence.
3. The LED lamp control circuit with low power consumption and no stroboscopic induction as claimed in claim 2, wherein the switch module comprises an NPN transistor, a base of the NPN transistor is a control terminal of the switch module, a collector of the NPN transistor is an input terminal of the switch module, and an emitter of the NPN transistor is a control terminal of the switch module; or the like, or, alternatively,
the switch module comprises an N-channel MOS tube, the grid electrode of the N-channel MOS tube is the control end of the switch module, the drain electrode of the N-channel MOS tube is the input end of the switch module, and the source electrode of the N-channel MOS tube is the output control end of the switch module.
4. The LED lamp control circuit with low power consumption and no stroboscopic induction according to claim 1, wherein the induction module comprises an induction unit and a voltage dividing unit, an output end of the induction unit is an output end of the induction module, a ground end of the induction unit is grounded, and a power supply end of the induction unit is connected with an auxiliary power supply end of the isolation power supply unit, an output end of the isolation power supply unit or an output end of the input rectifying module through the voltage dividing unit.
5. The LED lamp control circuit with low power consumption and no stroboscopic sensing is characterized in that the voltage dividing unit comprises a pull-up resistor and a pull-down resistor, the power supply end of the sensing unit is grounded through the pull-down resistor, and the power supply end of the sensing unit is further connected with the auxiliary power supply end of the isolated power supply unit, the output end of the isolated power supply unit or the output end of the input rectifying module through the pull-up resistor;
the induction module further comprises a voltage stabilizing unit, and a power supply end of the induction unit is grounded through the voltage stabilizing unit; the voltage stabilizing unit comprises a first voltage stabilizing diode, a power supply end of the induction unit is connected with a cathode of the first voltage stabilizing diode, and an anode of the first voltage stabilizing diode is grounded.
6. The low-power-consumption stroboflash-free induction LED lamp control circuit according to any one of claims 1-5, wherein the isolation power supply unit comprises a transformer, a power supply subunit, an absorption circuit subunit, an output control subunit and an output rectification filter subunit, the transformer comprises a primary winding, a secondary winding and an auxiliary winding, a first end of the primary winding is connected with an output end of the input rectification module and one end of the absorption circuit subunit respectively, a second end of the primary winding is connected with the other end of the absorption circuit subunit and an input end of the output control subunit respectively, an output end of the output control subunit is grounded, and a control end of the output control subunit is a control end of the isolation power supply unit; the first end of the auxiliary winding is an auxiliary power supply end of the isolation power supply unit, the first end of the auxiliary winding is further connected with the output end of the input rectification module and a power supply end of the drive control unit through the power supply electronic unit, and the second end of the auxiliary winding is grounded; the first end of the secondary winding is connected with the first end of the output rectifying and filtering subunit, the second end of the output rectifying and filtering unit is the output end of the isolation power supply unit, and the second end of the secondary winding is grounded;
the power supply electronic unit comprises a first resistor, a third resistor, a first diode and a second capacitor, wherein a first end of the auxiliary winding is connected with an anode of the first diode through the third resistor, a cathode of the first diode is respectively connected with one end of the first resistor, one end of the second capacitor and a power supply end of the driving control unit, the other end of the first resistor is connected with an output end of the input rectifying module, and the other end of the second capacitor is grounded; the absorption circuit subunit comprises a second resistor, a first capacitor and a second diode, wherein the first end of the primary winding is respectively connected with the other end of the first resistor, one end of the second resistor and one end of the first capacitor, the other end of the second resistor and the other end of the first capacitor are respectively connected with the cathode of the second diode, and the anode of the second diode is connected with the second end of the primary winding; the output control subunit comprises a first field effect transistor, a ninth resistor, a tenth resistor and an eleventh resistor, wherein a drain electrode of the first field effect transistor is connected with the second end of the primary winding, a source electrode of the first field effect transistor is respectively connected with one end of the tenth resistor and one end of the eleventh resistor, the other end of the eleventh resistor is grounded, a gate electrode of the first field effect transistor is respectively connected with one end of the ninth resistor and the other end of the tenth resistor, and the other end of the ninth resistor is a control end of the output control subunit; the output rectifying and filtering subunit comprises a third diode, a load resistor and a third filtering capacitor, the anode of the third diode is the first end of the output rectifying and filtering subunit, the cathode of the third diode is the second end of the output rectifying and filtering subunit, the cathode of the third diode is also respectively connected with one end of the load resistor and one end of the third filtering capacitor, and the second end of the secondary winding, the other end of the load resistor and the other end of the third filtering capacitor are grounded.
7. The LED lamp control circuit with low power consumption and no stroboscopic induction as claimed in claim 6, wherein the driving control unit comprises a driving chip, a current sampling subunit, a compensation subunit and a zero current detection subunit, an output current sampling end of the driving chip is connected to the output control subunit through the current sampling subunit, a ground end of the driving chip is grounded, a loop compensation end of the driving chip is grounded through the compensation subunit, a driving end of the driving chip is a driving end of the driving control unit, a power supply end of the driving chip is a power supply end of the driving control unit, and an inductance zero current detection end of the driving chip is connected to a first end of the auxiliary winding or an output end of the switch module through the zero current detection subunit;
the current sampling subunit comprises a sampling resistor, and an output current sampling end of the driving chip is connected with one end of the tenth resistor or the other end of the ninth resistor through the sampling resistor; the compensation subunit comprises a compensation resistor and a compensation capacitor, and the loop compensation end of the driving chip is grounded through the compensation resistor and the compensation capacitor; the zero current detection subunit comprises a first detection resistor and a second detection resistor, the inductance zero current detection end of the driving chip is grounded through the first detection resistor, and is also connected with the first end of the auxiliary winding or the output end of the switch module through the second detection resistor.
8. The LED lamp control circuit with low power consumption and no stroboscopic induction as claimed in any one of claims 1 to 5, wherein the stroboscopic removal circuit module comprises a stroboscopic removal chip, a starting unit, a filtering protection unit, a limiting protection unit, an output driving unit and an output current adjusting unit, wherein a power supply end of the stroboscopic removal chip is connected with an output end of the isolation power supply unit and a ground through the starting unit, a grounding end of the stroboscopic removal chip is grounded, a filtering current end of the stroboscopic removal chip is grounded through the filtering protection unit, a protection end of the stroboscopic removal chip is connected with an input end of the output driving unit and an output end of the LED module through the limiting protection unit, a voltage output end of the stroboscopic removal chip is connected with a control end of the output driving unit, and a current detection end of the stroboscopic removal chip is connected with one end of the output current adjusting unit and an output end of the output driving unit respectively The other end of the output current regulating unit is grounded;
the starting unit comprises a thirteenth resistor and a fourth capacitor, the power supply end of the stroboscopic removing chip is connected with the output end of the isolation power supply unit through the thirteenth resistor, and the power supply end of the stroboscopic removing chip is grounded through the fourth capacitor; the filtering protection unit comprises a fifth capacitor, and a filtering current end of the stroboscopic-removing chip is grounded through the fifth capacitor; the limiting protection unit comprises a fourteenth resistor, the output driving unit comprises a second field effect transistor and a sixth capacitor, the protection end of the stroboflash removal chip is respectively connected with the drain electrode of the second field effect transistor and the output end of the LED module through the fourteenth resistor, the voltage output end of the stroboflash removal chip is respectively connected with the grid electrode of the second field effect transistor and one end of the sixth capacitor, and the other end of the sixth capacitor is grounded; the output current adjusting unit comprises a fifteenth resistor, the current detection end of the stroboscopic-removing chip is respectively connected with the source electrode of the second field-effect tube and one end of the fifteenth resistor, and the other end of the fifteenth resistor is grounded.
9. The LED lamp control circuit with low power consumption and no stroboscopic induction as claimed in any one of claims 1-5, wherein the input rectifying module comprises an input protection unit, a rectifying unit, an output filtering unit, and a first power input terminal and a second power input terminal connected to an external power supply, the first power input terminal and the second power input terminal are respectively connected to one end of the input protection unit, the other end of the input protection unit is connected to the first end of the output filtering unit through the rectifying unit, and the second end of the output filtering unit is the output end of the input rectifying module;
the input protection unit comprises a safety resistor and a piezoresistor, the rectifying unit comprises a rectifying bridge, the first power input end is respectively connected with the first input end of the rectifying bridge and one end of the piezoresistor through the safety resistor, and the second power input end is respectively connected with the other end of the piezoresistor and the second input end of the rectifying bridge; the output filter unit comprises a first inductor, a first filter capacitor and a second filter capacitor, the first end of the first inductor is the first end of the output filter unit, the second end of the first inductor is the second end of the output filter unit, the first output end of the rectifier bridge is respectively connected with the first end of the first inductor and one end of the first filter capacitor, the second end of the first inductor is connected with one end of the second filter capacitor, and the second output end of the rectifier bridge, the other end of the first filter capacitor and the other end of the second filter capacitor are grounded.
10. An LED lamp, comprising a lamp body and the low-power-consumption no-strobe induction LED lamp control circuit of any one of claims 1 to 9, wherein the low-power-consumption no-strobe induction LED lamp control circuit is arranged in the lamp body.
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| WO2024174423A1 (en) * | 2023-02-21 | 2024-08-29 | 何文辉 | Ultra-thin energy-efficient single-stage high-power-factor led isolated driving power source |
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