CN111726910A - Chip integrated module, control circuit and lighting device - Google Patents
Chip integrated module, control circuit and lighting device Download PDFInfo
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- CN111726910A CN111726910A CN202010520242.9A CN202010520242A CN111726910A CN 111726910 A CN111726910 A CN 111726910A CN 202010520242 A CN202010520242 A CN 202010520242A CN 111726910 A CN111726910 A CN 111726910A
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Abstract
The invention discloses a chip integrated module, a control circuit and a lighting device. In the chip integrated module, include: the first freewheeling diode, the second voltage output pin and the drain electrode pin; the negative electrode of the first fly-wheel diode is connected with the second voltage output pin, and the positive electrode of the first fly-wheel diode is connected with the drain electrode pin; the second voltage output pin is an independent pin, and is vacant when the drain electrode pin is externally connected with the second freewheeling diode. When the second voltage output pin is empty, the first freewheeling diode does not form a loop with a peripheral circuit of the chip integrated module, namely the first freewheeling diode is not connected into the control circuit, the drain electrode pin is externally connected with the second freewheeling diode, and the second freewheeling diode can replace the first freewheeling diode to realize functions, so that when the first freewheeling diode in the chip integrated module does not meet the requirements of the control circuit, the externally connected second freewheeling diode can be flexibly selected, the compatibility of the chip integrated module is improved, and the optimization requirements of the control circuit are met.
Description
Technical Field
The application relates to the technical field of chip integration, in particular to a chip integration module, a control circuit and a lighting device.
Background
In the application of the lighting product, the control circuit in the lighting product comprises a chip integrated module and a peripheral circuit externally connected with the chip integrated module, and is used for controlling the light-emitting unit of the lighting device.
In order to improve the integration of the chip integrated module, the freewheel diode may be integrally packaged into the chip integrated module. However, after the freewheeling diode is packaged in the chip integrated module, if the freewheeling diode of the control circuit needs to be optimized subsequently, the whole chip integrated module needs to be replaced, which is costly and cannot flexibly implement optimization.
Disclosure of Invention
The invention discloses a chip integrated module, which is used for meeting the requirement of flexible optimization of a control circuit in practical application. In addition, the invention also provides a control circuit and a lighting device.
In order to solve the problems, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a chip integrated module, including: the first freewheeling diode, the second voltage output pin and the drain electrode pin; the negative electrode of the first freewheeling diode is connected with the second voltage output pin, and the positive electrode of the first freewheeling diode is connected with the drain electrode pin; the second voltage output pin is an independent pin, and is in a null state when the drain electrode pin is externally connected with a second freewheeling diode.
Above-mentioned chip integrated module, chip integrated module is used for the inductance of external filter, chip integrated module includes: the rectifier comprises an alternating current input pin, a first grounding pin, a first voltage output pin and a rectifier unit, wherein the rectifier unit is provided with a rectifier input end, a rectifier output end and a public reference end, the rectifier input end is connected with the alternating current input pin, the first grounding pin is independently connected with the public reference end, and the first voltage output pin is independently connected with the rectifier output end; at least one of the first grounding pin and the first voltage output pin is used for externally connecting the inductor of the filter.
Above-mentioned chip integrated module, chip integrated module still includes: the current signal sampling pin, the second grounding pin and the control pin; the current signal sampling pin is externally connected with a sampling resistor to sample the current value in the control circuit; inside the chip integrated module, the second ground pin is independent of the first ground pin; the control pin is used for being connected with an external resistor, and the chip integration module determines the over-temperature protection threshold according to the resistance value of the external resistor.
The chip integrated module further comprises a switch tube and a logic control unit, wherein the switch tube comprises a source electrode, a drain electrode and a control electrode, the logic control unit is provided with a current sampling end and a driving end, the source electrode is connected with the current signal sampling pin and the current sampling end, the drain electrode is connected with the drain electrode pin, and the driving end is connected with the control electrode to control the switch tube to be turned off or turned on.
In a second aspect, the present invention provides a control circuit comprising a second freewheeling diode and the chip integrated module described in any of the above; the negative electrode of the second freewheeling diode is connected with a load, the positive electrode of the second freewheeling diode is connected with the drain electrode pin, and the output pin of the second power supply is vacant.
In the control circuit, a rated current of the second freewheeling diode is larger than a rated current of the first freewheeling diode.
In the above control circuit, the chip integrated module includes: the rectifier comprises an alternating current input pin, a first grounding pin, a first voltage output pin and a rectifier unit, wherein the rectifier unit is provided with a rectifier input end, a rectifier output end and a public reference end, the rectifier input end is connected with the alternating current input pin, and the first grounding pin is independently connected with the public reference end;
the control circuit further comprises a filter and an external ground, the filter comprises a filter inductor, and the filter inductor comprises a first end and a second end;
the first end is connected with the first voltage output pin, and the second end is used for connecting a load; or
The first end is connected with the first grounding pin, the second end is connected with the second grounding pin of the chip integrated module, and the second grounding pin is connected with the external grounding end.
In the above control circuit, when the first end is connected to the first voltage output pin and the second end is used for connecting to a load, the filter further includes a first filter capacitor and a second filter capacitor; the negative electrodes of the first filter capacitor and the second filter capacitor are connected with the first grounding pin, the positive electrode of the first filter capacitor is connected with the first end, and the positive electrode of the second filter capacitor is connected with the second end.
In the above control circuit, when the first end is connected to the first ground pin and the second end is connected to the second ground pin of the chip integrated module, the filter further includes a first filter capacitor and a second filter capacitor; the negative electrodes of the first filter capacitor and the second filter capacitor are respectively connected with the first end and the second end, and the positive electrodes of the first filter capacitor and the second filter capacitor are both used for being connected with a load.
In the control circuit, the control circuit further comprises a chopper, and two ends of the chopper are respectively connected with the drain pin and the load.
In the above control circuit, the chip integrated module further includes a current signal sampling pin, the control circuit includes a sampling resistor, and the sampling resistor is connected between the current signal sampling pin and the external ground terminal.
In the control circuit, the chip integrated module further includes a control pin; the control circuit comprises an external resistor, and the external resistor is connected between the control pin and the external grounding terminal; and the chip integration module determines an over-temperature protection threshold and a temperature-current curve slope according to the resistance value of the external resistor.
In a third aspect, the present invention provides a lighting device, comprising a light emitting unit, and the control circuit as described in any one of the above, for inputting a direct current to the light emitting unit.
Compared with the prior art, the invention has the following beneficial effects:
the chip integrated module disclosed by the invention comprises: the first freewheeling diode, the second voltage output pin and the drain electrode pin; the negative electrode of the first freewheeling diode is connected with the second voltage output pin, and the positive electrode of the first freewheeling diode is connected with the drain electrode pin; the second voltage output pin is an independent pin, and is in a null state when the drain electrode pin is externally connected with a second freewheeling diode. When the second voltage output pin is empty, the first freewheeling diode does not form a loop with a peripheral circuit of the chip integrated module, namely the first freewheeling diode is not connected into the control circuit, the drain electrode pin is externally connected with the second freewheeling diode, and the second freewheeling diode can replace the first freewheeling diode to realize functions, so that when the first freewheeling diode in the chip integrated module does not meet the requirements of the control circuit, the externally connected second freewheeling diode can be flexibly selected, the compatibility of the chip integrated module is improved, and the optimization requirements of the control circuit are met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a chip integrated module according to an embodiment of the present invention;
FIG. 2 is a block diagram of a logic control unit of the chip integrated module of FIG. 1;
fig. 3 is a schematic structural diagram of a control circuit according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of another control circuit according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a control circuit according to a third embodiment of the present invention.
Reference numerals:
100-chip integrated module; 10-a logic control unit; 11-a temperature detection subunit; 111-the output of the temperature detection subunit; 12-a control subunit; 121-temperature input; 122 — a logic output; 13-a drive subunit; 131-input of drive subunit; 14-logic ground; 15-current sampling end; 16-a drive end; 17-threshold adjustment end; 200/200' -control circuitry; 210-a filter; 220-a chopper; 230-an alternating current module; 240-load;
ACIN-AC input pin; ACIN 1-AC first input pin; ACIN 2-AC second input pin;
GND 1-first ground pin; GND 2-second ground pin; GND 3-external ground;
d1-a rectifying unit; d1 IN-rectifying input; d1IN 1-rectifying the first input; d1IN 2-a rectified second input terminal; d1 OUT-a rectification output end; d1 CG-common reference terminal; d2 — first freewheeling diode; d3 — second freewheeling diode;
EC1/EC 1' -first filter capacitance; EC2/EC 2' -second filter capacitance; EC3 — third capacitance;
L1/L1' -filter inductance; l2-chopper inductance;
vin 1-first voltage output pin; vin 2/NC-second voltage output pin;
ISEN-current signal sampling pin;
q-switching tube; a QS-source; QD-drain; QG-control pole;
TH/SLP-control pin;
Rth/Rslp-external resistor; RL-parallel resistance; rcs — sampling resistor;
an LED-light emitting unit;
Drain-Drain pin;
an AC-AC source; fuse-fuses.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the embodiment of the present invention, the chip integrated module may be an AC-DC integrated module, or other chip integrated modules that need to add a filter, which is not described herein again. The electromagnetic compatibility may be a requirement for emi (electromagnetic interference) electromagnetic compatibility, or other electromagnetic compatibility requirements.
Example one
As shown in fig. 1, an embodiment of the present invention provides a chip integrated module 100, configured to connect an inductor of an external filter, where the chip integrated module includes: the rectifier circuit comprises an alternating current input pin ACIN, a first ground pin GND1, a first voltage output pin Vin1, and a rectifying unit D1, wherein the rectifying unit D1 has a rectifying input end D1IN, a rectifying output end D1OUT and a common reference end D1 CG. The alternating current input pin ACIN is connected with the rectifying input end D1IN, the number of pins of the alternating current input pin ACIN is two, and the alternating current input pin ACIN comprises an alternating current first input pin ACIN1 and an alternating current second input pin ACIN 2; the number of the rectified input terminals D1IN is two, including a rectified first input terminal D1IN1 and a rectified second input terminal D1IN 2. The two ac input pins ACIN are respectively connected to the two rectifying input terminals D1IN, specifically, the ac first input pin ACIN1 is connected to the rectifying first input pin D1IN1, and the ac second input pin ACIN2 is connected to the rectifying second input pin D1IN 2. The first ground pin GDN2 is independently connected to the common reference terminal D1CG, the first voltage output pin Vin1 is independently connected to the rectified output terminal D1OUT, and at least one of the first ground pin GDN1 and the first voltage output pin Vin1 is used for an inductor of the external filter.
In the embodiment of the present invention, the independent connection means that the pin is separately connected to a certain end in the chip integrated module, that is, the pin is specially provided for the certain end in the chip integrated module.
In the embodiment of the present invention, the first ground pin GND1 is connected to the open reference terminal D1CG of the rectifying unit D1in the ic 100, and is not connected to other terminals of the ic 100, and the first voltage output pin Vin1 is connected to the rectifying output terminal D1OUT of the rectifying unit D1in the ic 100, and is not connected to other terminals of the ic 100, so that an inductor disposed outside the ic 100 and used for filtering an electrical signal in the control circuit 200 may be connected to the low potential side where the first ground pin GND1 is located, or connected to the high potential side where the first voltage output pin Vin1 is located, and a user can flexibly set the position of the inductor of the filter 210 according to actual requirements, thereby improving the compatibility of the ic. The rectifying unit D1 may be a common rectifying device such as a rectifying bridge.
The chip integrated module 100 further includes: a first freewheeling diode D2, a second voltage output pin Vin2/NC and a Drain pin Drain. The cathode of the first freewheeling diode D2 is connected to the second voltage output pin Vin2/NC, and the anode of the first freewheeling diode D2 is connected to the Drain pin Drain. The second voltage output pin Vin2/NC is an independent pin, and is not connected to other terminals in the chipset module except for the cathode of the first freewheeling electrode D2, so that the Drain pin Drain may be left empty when the second freewheeling diode D3 is externally connected to the Drain pin Drain. Specifically, when the second voltage output pin Vin2/NC is idle, the first freewheeling diode D2 does not form a loop with the peripheral circuit of the chip integrated module 100, that is, the first freewheeling diode D2 is not connected to the control circuit 200, the Drain pin Drain is externally connected to the second freewheeling diode D3, and the second freewheeling diode D3 can replace the first freewheeling diode D1 to implement a freewheeling function, so that when the first freewheeling diode D2 in the chip integrated module 100 does not meet the requirement of the control circuit 200, the externally connected second freewheeling diode D3 can be flexibly selected, the compatibility of the chip integrated module 100 is improved, and the optimization requirement of the control circuit 200 is met.
The rated current of the second freewheeling diode D3 may be greater than the rated current of the first freewheeling diode D2, and then when the rated current of the first freewheeling diode D2 in the chip integrated module 100 cannot meet the requirement of a larger output current, the second voltage output pin Vin2/NC is set to be empty, and the Drain pin Drain is externally connected to the second freewheeling diode D3 with a larger rated current, so that the requirement of a larger output current can be met in the control circuit, and the optimization requirement in practical application is realized. Of course, in some particular implementations, the current rating of the second freewheeling diode D3 may be less than or equal to the current rating of the first freewheeling diode D2. In addition to the rated current, other electrical parameters of the second freewheeling diode D3 may also be greater than, less than or equal to those of the first freewheeling diode D3; the electrical parameters include withstand voltage values, power values, and the like.
The chip integrated module 100 further includes a current signal sampling pin ISEN, which is used for externally connecting a sampling resistor Rcs to sample a current value in the control circuit. The chip integrated module 100 further includes a second ground pin GND2, and the second ground pin GND2 and the first ground pin GND1 are independent of each other.
To sum up, in the chip integrated module 100 according to the embodiment of the present invention, the number of the pins is 9, which specifically includes: the current sampling circuit comprises an alternating current first input pin ACIN1, an alternating current second input pin ACIN2, a first ground pin GND1, a second ground pin GND2, a first voltage output pin Vin1, a second voltage output pin VIN2, a current sampling pin ISEN, a control pin TH/SLP, and a Drain pin Drain.
Specifically, the chip integrated module further includes a logic control unit 10 and a switching tube Q.
The logic control unit 10 has a logic ground 14, and the second ground pin GND2 is connected to the logic ground 14 of the logic control unit 10.
The logic control unit 10 has a current sampling end 15, a driving end 16 and a threshold adjusting end 17 in addition to the logic ground end 14, the current sampling end 15 is connected to a current signal sampling pin ISEN for inputting a collected current signal, the driving end 16 is used for outputting a driving instruction, the threshold adjusting end 17 is connected to a control pin TH/SLP of the chip integration module, and the chip integration module 100 determines an over-temperature protection threshold or a temperature-current curve slope of the chip integration module according to a resistance value of an external resistor based on a preset mapping relationship.
The switch tube Q includes a source QS, a drain QD, and a control electrode QG, where the source QS is connected to the current signal sampling pin ISEN and the current sampling terminal 15 of the logic control unit 10, that is, the current signal sampling pin ISEN of the chip integrated module 100 is connected to the current sampling terminal 15 of the logic control unit 10. The driving end 16 of the logic control unit 10 is connected to the control electrode QG of the switching tube Q, and outputs a driving signal to the control electrode QG of the switching tube Q based on the current target of current reduction or current rise in combination with the sampled current signal, so as to control the switching-off or switching-on of the switching tube Q, thereby achieving the purpose of adjusting voltage or current. The Drain QD is connected to the Drain pin Drain, that is, the Drain QD is connected to the anode of the first freewheeling diode. The switch tube is a common triode or MOS tube.
Specifically, as shown in fig. 2, the logic control unit 10 may include a temperature detection subunit 11, a control subunit 12, and a driving subunit 13. The temperature detecting subunit 11 includes a detecting unit for detecting the current temperature of the chip integrated module 100, and an output end 111, where the output end 111 of the temperature detecting subunit sends a logic signal to the control subunit 12 according to the detected current temperature. The control subunit 12 includes a temperature input end 121, a current sampling end 15, and a logic output end 122, where the temperature input end 121 is connected to the output end 111 of the temperature detection subunit 11 and is configured to receive a logic signal sent by the temperature detection subunit 11, and the current sampling end 15 is connected to a current signal sampling pin ISEN. The driving subunit 13 includes an input end 131 and an output end 16, the input end 131 of the driving subunit 13 is connected to the logic output end 122 of the control subunit 12 to receive the driving signal output by the control subunit 12, the output end of the driving subunit 13 is connected to the control electrode QG of the switching tube Q, and is configured to output a driving instruction to the control electrode QG of the switching tube Q according to the received driving signal, and the switching tube Q is turned on or off according to the driving instruction. Obviously, the output terminal of the driving subunit 13 is the driving terminal 16 of the logic control unit 10.
The chip integrated module 100 of the embodiment of the present invention may utilize one control pin TH/SLP to connect the external resistor Rth/Rslp, and the logic control unit 10 determines the over-temperature protection threshold and the temperature-current curve slope of the chip integrated module 100 according to the resistance value of the external resistor Rth/Rslp, that is, only one control pin TH/SLP may be set for implementing two functions.
Wherein, the preset mapping relationship comprises: and determining the over-temperature protection threshold of the chip integrated module 100 according to the resistance value of the external resistor Rth/Rslp based on the mapping relation between the first resistance value interval and the over-temperature protection value. The preset mapping relationship further includes: and determining the over-temperature protection threshold of the chip integrated module 100 according to the resistance value of the external resistor Rth/Rslp based on the mapping relation between the second resistance value interval and the slope of the temperature-current curve.
The above-described preset relationship may be set in the logic control unit 10 in advance. For example, when the resistance value of the external resistor Rth/Rslp is between 100 and 200 ohms, the over-temperature protection threshold value is A, and when the resistance value of the external resistor Rth/Rslp is between 200 and 300 ohms, the over-temperature protection threshold value is B. If the current resistance value of the external resistor Rth/Rslp is 150 ohms, the over-temperature protection threshold value is A, and the slope of the temperature-current curve is K1; if the current resistance value of the external resistor Rth/Rslp is adjusted to 180 ohms, the over-temperature protection threshold is still A, but the slope of the temperature-current curve is K2. Obviously, the external resistor Rth/Rslp is a resistor with an adjustable resistance value, and can be adjusted according to the actual requirements of the chip integrated module 100.
For example, the temperature detecting subunit 11 detects the current temperature of the chip integrated module 100, and sends a corresponding logic signal to the control subunit 12 according to the current temperature. The control subunit 12 obtains the corresponding over-temperature protection threshold according to the resistance value of the external resistor Rth/Rslp, and determines whether the current temperature exceeds the over-temperature protection threshold based on the logic signal, and if so, the temperature needs to be reduced. The control subunit 12 obtains the slope of the temperature-current curve of the chip integrated module 100 according to the resistance value of the external resistor Rth/Rslp, determines how much current value needs to be adjusted according to the temperature value to be reduced or the target temperature value and the current obtained by sampling, calculates a corresponding driving signal accordingly, and sends the driving signal to the driving subunit 13. The driving subunit 13 generates a driving instruction for turning on or off the switching tube Q according to the driving signal, thereby completing current regulation.
Example two
An embodiment of the invention provides a control circuit 200, as shown in fig. 3, the control circuit 200 includes a filter 210, an external ground GND3, and a chip integrated module 100. The filter 210 includes a filter inductor L1, and the filter inductor L1 includes a first terminal connected to the first voltage output pin Vin1 of the chip integrated module 100 and a second terminal connected to the load 240. In the embodiment of the present invention, the filter inductor L1 in the filter 210 is disposed on the high side of the control circuit 200. The filter inductor L1 may be a differential mode inductor.
As shown in fig. 3, the filter 210 may be an EMI filter, such as a pi-type EMI filter. When the filter 210 is a pi-type EMI filter, the filter 210 further includes a first filter capacitor EC1 and a second filter capacitor EC2, cathodes of the first filter capacitor EC1 and the second filter capacitor EC2 are both connected to the first ground pin GND1 of the chip integrated module 100, a positive electrode of the first filter capacitor EC1 is connected to the first terminal, and a positive electrode of the second filter capacitor EC2 is connected to the second terminal.
With reference to fig. 1 and 3, when the second voltage output pin Vin2/NC of the chip integrated module 100 is in a non-idle state, the second voltage output pin Vin2/NC is connected to the second end of the filter inductor L1, that is, to the anode of the load 240, at this time, the first freewheeling diode D2 in the chip integrated module 100 is connected to the control circuit 200 to form a loop, and the control circuit 200 does not need to be provided with the second freewheeling diode D3 to complete freewheeling.
With reference to fig. 1 and 4, when the first freewheeling diode D2 in the chip integrated module 100 cannot meet the requirement of the control circuit 200 (e.g., a requirement of a large output current), the second voltage output pin Vin2/NC may be set to be empty, the Drain pin Drain is externally connected to the second freewheeling diode D3 with a large rated current, and the rated current of the second freewheeling diode D3 may be flexibly set according to the requirement, so as to achieve the optimization requirement in practical application. The anode of the second freewheeling diode D3 is connected to the Drain terminal Drain, and the cathode is connected to the anode of the load 240 and the second terminal of the filter inductor L1. At this time, the first freewheeling diode D2 in the chip integrated module 100 is not connected to the control circuit 200 to form a loop, but the second freewheeling diode D3 is connected to the control circuit 200 to form a loop.
The control circuit 200 further includes a chopper 220, wherein both ends of the chopper 220 are respectively connected to the Drain terminal Drain and the load 240, and particularly to the negative electrode of the load 240, and the chopper 220 is used for regulating the voltage output to the load 240. Specifically, in the embodiment of the present invention, the chopper 220 includes a chopping inductor L2, and two ends of the chopping inductor L2 are respectively connected to the Drain pin Drain and the load 240.
The control circuit 200 further includes a sampling resistor Rcs connected between the current signal sampling pin ISEN and an external ground GND3 to sample the current in the control circuit. The first ground pin GND1 and the second ground pin GND2 in the chip integrated module 100 are both connected to the external ground GND 3.
The embodiment of the invention provides a control circuit 200, which further comprises an external resistor Rth/Rslp. The external resistor Rth/Rslp is connected between the control pin TH/SLP and the external ground terminal GND3, and the control circuit 200 determines the over-temperature protection threshold and the temperature-current curve slope of the chip integrated module 100 according to the resistance value of the external resistor Rth/Rslp. Obviously, the external resistor Rth/Rslp is an adjustable resistor.
The control circuit 200 of the embodiment of the present invention utilizes an external resistor Rth/Rslp to drive the logic control unit 10 to determine the over-temperature protection threshold and the temperature-current curve slope of the chip integrated module 100 according to the resistance value of the external resistor Rth/Rslp, that is, only one external resistor Rth/Rslp may be set to realize two functions.
The control circuit 200 further includes an AC module 230, where the AC module 230 includes an AC source AC and a Fuse, and two ends of the AC source AC are respectively connected to the AC first input pin ACIN1 and the AC second input pin ACIN 2; the Fuse is connected between the AC source AC and any one of the AC input pins ACIN, and is disconnected when the current exceeds a predetermined value, thereby protecting the chip integrated module 100.
In the embodiment of the present invention, the load 240 may include an LED lighting unit, or may be other components that need to be powered by a direct current. Specifically, referring to fig. 4, the load 240 includes a third capacitor EC3 and a parallel resistor RL disposed in parallel with the LED lighting unit.
In addition, in the control circuit 200 of this application, the electric capacity setting of filter 220 is in rectifying unit D1's rear end, and the alternating current that is the alternating current source AC input is rectified earlier the back filtering to make need not to use the ann rule electric capacity on the filter 220 but use electrolytic capacitor or film capacitor just can realize the filtering effect, because electrolytic capacitor or film capacitor are littleer than the volume of ann rule electric capacity, the cost is also lower, thereby make the chip integrated module 100 can not increase cost and volume by a wide margin after connecting filter 220.
EXAMPLE III
An embodiment of the present invention provides a control circuit 200 ', as shown in fig. 5, the control circuit 200' includes a filter 210 and a chip integrated module 100 implementing one. The filter 210 includes a filter inductor L1 ', and the filter inductor L1' includes a first terminal and a second terminal. The following mainly explains the difference between the control circuit 200' of the present embodiment and the control circuit 200 of the second embodiment, and the same parts as the rest can refer to the control circuit 200 of the second embodiment.
In the embodiment of the present invention, a first end of the filter inductor L1 'is connected to the first ground pin GND1 of the chip integrated module 100, a second end of the filter inductor L1' is connected to the second ground pin GND2 of the chip integrated module 100, and the second ground pin GND2 is connected to the external ground terminal GND3 of the control circuit.
When the filter 210 is a pi-type EMI filter, the filter 210 further includes a first filter capacitor EC1 ' and a second filter capacitor EC2 ', cathodes of the first filter capacitor EC1 ' and the second filter capacitor EC2 ' are respectively connected to a first end and a second end of the filter inductor L1 ', and anodes of the first filter capacitor EC1 ' and the second filter capacitor EC2 ' are both connected to the load 240, that is, both connected to the first voltage output pin Vin1 of the chip integrated module 100.
The first ground pin GND1 of the chip integrated module is not directly connected to the external ground terminal GND3 of the control circuit 200, and a filter inductor L1' is connected between the first ground pin and the external ground terminal GND 3.
The control circuit 200' in fig. 5 realizes the freewheel function using the first freewheel diode D2 in the chip integrated module 100; it should be understood that the second voltage output pin Vin2/NC may also be left empty in fig. 5, and the second freewheeling diode D3 is externally connected to the Drain pin Drain to implement the freewheeling function.
Example four
The embodiment of the invention provides a lighting device, which comprises a light-emitting unit LED and a control circuit 200 in the second embodiment or the third embodiment, wherein the control circuit is used for inputting direct current to the light-emitting unit LED, and the light-emitting unit is used for emitting lighting rays.
It should be apparent to those skilled in the art that while the preferred embodiments of the present invention have been described, additional variations and modifications in these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (13)
1. A chip integrated module, comprising: the first freewheeling diode, the second voltage output pin and the drain electrode pin; the negative electrode of the first freewheeling diode is connected with the second voltage output pin, and the positive electrode of the first freewheeling diode is connected with the drain electrode pin; the second voltage output pin is an independent pin, and is in a null state when the drain electrode pin is externally connected with a second freewheeling diode.
2. The chip integrated module according to claim 1, wherein the chip integrated module is used for externally connecting an inductor of a filter, and the chip integrated module comprises: the rectifier comprises an alternating current input pin, a first grounding pin, a first voltage output pin and a rectifier unit, wherein the rectifier unit is provided with a rectifier input end, a rectifier output end and a public reference end, the rectifier input end is connected with the alternating current input pin, the first grounding pin is independently connected with the public reference end, and the first voltage output pin is independently connected with the rectifier output end; at least one of the first grounding pin and the first voltage output pin is used for externally connecting the inductor of the filter.
3. The chip integrated module according to claim 1, further comprising: the current signal sampling pin, the second grounding pin and the control pin; the current signal sampling pin is externally connected with a sampling resistor to sample the current value in the control circuit; inside the chip integrated module, the second ground pin is independent of the first ground pin; the control pin is used for being connected with an external resistor, and the chip integration module determines the over-temperature protection threshold according to the resistance value of the external resistor.
4. The chip integrated module according to claim 3, further comprising a switch tube and a logic control unit, wherein the switch tube comprises a source, a drain and a control electrode, the logic control unit has a current sampling end and a driving end, the source is connected to the current signal sampling pin and the current sampling end, the drain is connected to the drain pin, and the driving end is connected to the control electrode to control the switch tube to be turned off or turned on.
5. A control circuit comprising a second freewheeling diode and a chip integrated module according to any one of claims 1-4; the negative electrode of the second freewheeling diode is connected with a load, the positive electrode of the second freewheeling diode is connected with the drain electrode pin, and the output pin of the second power supply is vacant.
6. The control circuit of claim 5, wherein the current rating of the second freewheeling diode is greater than the current rating of the first freewheeling diode.
7. The control circuit of claim 5, wherein the chip integrated module comprises: the rectifier comprises an alternating current input pin, a first grounding pin, a first voltage output pin and a rectifier unit, wherein the rectifier unit is provided with a rectifier input end, a rectifier output end and a public reference end, the rectifier input end is connected with the alternating current input pin, and the first grounding pin is independently connected with the public reference end;
the control circuit further comprises a filter and an external ground, the filter comprises a filter inductor, and the filter inductor comprises a first end and a second end;
the first end is connected with the first voltage output pin, and the second end is used for connecting a load; or
The first end is connected with the first grounding pin, the second end is connected with the second grounding pin of the chip integrated module, and the second grounding pin is connected with the external grounding end.
8. The control circuit of claim 7, wherein when the first terminal is connected to the first voltage output pin and the second terminal is connected to a load, the filter further comprises a first filter capacitor and a second filter capacitor; the negative electrodes of the first filter capacitor and the second filter capacitor are connected with the first grounding pin, the positive electrode of the first filter capacitor is connected with the first end, and the positive electrode of the second filter capacitor is connected with the second end.
9. The control circuit of claim 8, wherein when the first terminal is connected to the first ground pin and the second terminal is connected to a second ground pin of a chip integrated module, the filter further comprises a first filter capacitor and a second filter capacitor; the negative electrodes of the first filter capacitor and the second filter capacitor are respectively connected with the first end and the second end, and the positive electrodes of the first filter capacitor and the second filter capacitor are both used for being connected with a load.
10. The control circuit of claim 5, further comprising a chopper, wherein the drain pin and the load are connected to two ends of the chopper, respectively.
11. The control circuit of claim 7, wherein the on-chip integrated module further comprises a current signal sampling pin, and wherein the control circuit comprises a sampling resistor connected between the current signal sampling pin and the external ground.
12. The control circuit of claim 7, wherein the chip integrated module further comprises a control pin; the control circuit comprises an external resistor, and the external resistor is connected between the control pin and the external grounding terminal; and the chip integration module determines an over-temperature protection threshold and a temperature-current curve slope according to the resistance value of the external resistor.
13. A lighting device comprising a light emitting unit, and the control circuit according to any one of claims 5 to 12, wherein the control circuit is configured to input a direct current to the light emitting unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010520242.9A CN111726910A (en) | 2020-06-09 | 2020-06-09 | Chip integrated module, control circuit and lighting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010520242.9A CN111726910A (en) | 2020-06-09 | 2020-06-09 | Chip integrated module, control circuit and lighting device |
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| CN203691725U (en) * | 2014-02-08 | 2014-07-02 | 无锡硅动力微电子股份有限公司 | Light emitting diode (LED) driving controller integrated with power factor correction (PFC) function |
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| CN205071365U (en) * | 2015-08-24 | 2016-03-02 | 深圳市晶导电子有限公司 | Emitting diode lighting drive circuit and lamps and lanterns |
| CN212259385U (en) * | 2020-06-09 | 2020-12-29 | 欧普照明股份有限公司 | Chip integrated module, control circuit and lighting device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203691725U (en) * | 2014-02-08 | 2014-07-02 | 无锡硅动力微电子股份有限公司 | Light emitting diode (LED) driving controller integrated with power factor correction (PFC) function |
| CN204482092U (en) * | 2015-03-23 | 2015-07-15 | 深圳市稳先微电子有限公司 | A kind of non-isolated voltage-dropping type LED drive circuit of intelligent synchronization rectification |
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