Chip integrated module, control circuit and lighting device

Abstract

The present invention discloses a chip integrated module, a control circuit and a lighting device, wherein the chip integrated module comprises: an AC input pin, a second ground pin, a first ground pin, a rectifier unit, a power supply voltage input pin and a logic control unit, wherein the AC input pin is connected to the rectifier input terminal, the first ground pin is connected to the common reference terminal, and the second ground pin is connected to the logic control unit; the power supply voltage input pin is connected to the rectifier output terminal. Since the chip integrated module has two ground pins, when a filter is connected on the basis of the chip integrated module, the first inductor of the filter can be connected between the two ground pins, and then the first capacitor of the filter can be set between the power supply voltage input pin and the first ground pin, that is, the first capacitor of the filter is placed at the rear end of the rectifier unit, so that the filter can achieve the filtering effect by using electrolytic capacitors or film capacitors instead of safety capacitors.

Description

Technical Field

[0001] The present application relates to the field of chip integration technology, and in particular to a chip integration module, a control circuit and a lighting device. Background Art

[0002] In the application of lighting products, the functional requirements for control circuits in lighting products are becoming increasingly higher. For example, after satisfying AC-DC (Alternating Current - Direct Current) conversion, the product also needs to meet the requirements of electromagnetic compatibility.

[0003] Take the AC-DC chip module 100' in the chip integrated module as an example. Figure 1 As shown, since the AC-DC chip module 100' usually has only a single common ground pin, the filter 210' needs to be connected to the input end of the AC-DC chip module 100', that is, the AC side of the AC-DC chip module 100'. Based on capacitor withstand voltage and safety considerations, the filter 210' needs to use a safety capacitor CX1 (such as an X safety capacitor). However, the safety capacitor CX1 is relatively expensive and has a large volume, resulting in a significant increase in volume and cost after the AC-DC chip module is connected to the filter 210'.

[0004] Therefore, a new chip integrated module is urgently needed to meet the increased functional requirements of the product without significantly increasing the size and cost. Summary of the invention

[0005] The present invention discloses a chip integrated module to solve the problem that the volume and cost of a product increase significantly after the functional requirements increase. In addition, the present invention also provides a control circuit and a lighting device.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a chip integrated module, comprising: an AC input pin, a first ground pin, a second ground pin, a rectifier unit, a power supply voltage input pin and a logic control unit, wherein the rectifier unit has a rectifier input terminal, a rectifier output terminal and a common reference terminal, wherein the AC input pin is connected to the rectifier input terminal, the first ground pin is connected to the common reference terminal, the logic control unit has a ground terminal, and the second ground pin is connected to the ground terminal; the power supply voltage input pin is connected to the rectifier output terminal.

[0008] The above-mentioned chip integrated module also includes a switch tube and a current signal sampling pin, the switch tube includes a source 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, and the driving end is connected to the control electrode to control the switch tube to be turned off or on.

[0009] The above-mentioned chip integrated module further includes a freewheeling diode, wherein the positive electrode of the freewheeling diode is connected to the rectifier output end, and the negative electrode of the freewheeling diode is connected to the power supply voltage input pin.

[0010] In the above-mentioned chip integrated module, the logic control unit is provided with an over-temperature protection threshold of the chip integrated module and a slope of a temperature-current curve of the chip integrated module; the logic control unit comprises a temperature detection subunit, a control subunit and a driving subunit; the control subunit comprises a temperature input terminal, the current sampling terminal and a logic output terminal, the temperature input terminal is connected to the temperature detection subunit, the logic output terminal is connected to the driving subunit to output a driving signal to the driving subunit; the temperature detection subunit is used to detect the temperature of the chip integrated module and send a logic signal to the control subunit, and the driving subunit is connected between the logic output terminal and the control electrode of the switching tube.

[0011] The above-mentioned chip integrated module also includes a first control pin, which is used to connect a first external resistor; the control subunit includes a first threshold adjustment end, which is connected to the first control pin; the chip integrated module determines the over-temperature protection threshold according to the resistance value of the first external resistor.

[0012] The above-mentioned chip integrated module also includes a second control pin, which is used to connect a second external resistor; the control subunit includes a second threshold adjustment end, which is connected to the second control pin; the logic control unit determines the slope of the temperature-current curve according to the resistance value of the second external resistor.

[0013] In a second aspect, the present invention provides a control circuit, comprising a filter and a chip integrated module as described in any one of the above items, wherein the filter comprises a first inductor and a first capacitor, wherein the two ends of the first inductor are respectively connected to the second ground pin and the first ground pin, and the second ground pin and the first ground pin are grounded; the positive electrode of the first capacitor is connected to the power supply voltage input pin, and the negative electrode of the first capacitor is connected to the second ground pin.

[0014] In the above control circuit, the chip integrated module further includes a current signal sampling pin, and the control circuit includes a sampling resistor, and the sampling resistor is connected between the current signal sampling pin and the second ground pin.

[0015] The above-mentioned control circuit, the chip integrated module also includes a first control pin; the control circuit includes a first external resistor, the first external resistor is connected between the first control pin and the second ground pin, and the chip integrated module determines the over-temperature protection threshold according to the resistance value of the first external resistor.

[0016] The control circuit mentioned above, the chip integrated module further includes a second control pin;

[0017] The control circuit includes a second external resistor, which is connected between the second control pin and the second ground pin. The chip integrated module determines the slope of the temperature-current curve according to the resistance value of the second external resistor.

[0018] The above control circuit further comprises a chopper, and the chopper is connected between the chip integrated module and the load.

[0019] In the above-mentioned control circuit, the chip integrated module includes a switch tube, and the switch tube includes a drain;

[0020] The chopper includes a second inductor and a second capacitor, wherein the second inductor is connected between the drain and the load; the positive electrode of the second capacitor is connected to the supply voltage input pin, and the negative electrode of the second capacitor is connected to the second ground pin.

[0021] The above-mentioned control circuit further includes an AC module, which includes an AC source and a fuse. The AC source is connected to the AC input pin; the fuse is connected between the AC source and the AC input pin.

[0022] In a third aspect, the present invention provides a lighting device, comprising a light-emitting unit and a control circuit as described above, wherein the control circuit is used to input direct current to the light-emitting unit.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The chip integrated module disclosed in the present invention includes a second grounding pin and a first grounding pin. Since the chip integrated module has two grounding pins, when a filter is connected on the basis of the chip integrated module, the first inductor of the filter can be connected between the two grounding pins, and then the first capacitor of the filter is set between the power supply voltage input pin and the first grounding pin, that is, the first capacitor of the filter is placed at the rear end of the rectifier unit, that is, the input alternating current is first rectified and then filtered, so that the filter does not need to use safety capacitors but uses electrolytic capacitors or film capacitors to achieve filtering effects, which also means that the chip integrated module will not significantly increase the cost and volume after the filter is connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0026] Figure 1 The control circuit and the chip integrated module included in the prior art;

[0027] Figure 2 A schematic diagram of the structure of a chip integrated module provided in Embodiment 1 and Embodiment 2 of the present invention;

[0028] Figure 3 for Figure 2 A schematic diagram of a logic control unit of a chip integrated module;

[0029] Figure 4 A schematic diagram of the structure of a control circuit provided in Embodiment 3 of the present invention.

[0030] Reference numerals:

[0031] 100'- prior art AC-DC chip module; 200'- prior art control circuit; 210'- prior art filter;

[0032] 100-chip integrated module; 10-logic control unit; 11-temperature detection subunit; 111-output end of temperature detection subunit; 12-control subunit; 121-temperature input end; 122-logic output end; 13-drive subunit; 131-input end of drive subunit; 14-ground end; 15-current sampling end; 16-drive end; 17-threshold adjustment end; 200-control circuit; 210-filter; 220-chopper; 230-AC module; 240-load;

[0033] ACIN: AC input pin;

[0034] GND1-first ground pin; GND2-second ground pin;

[0035] D1-rectifier unit; D1IN-rectifier input terminal; D1OUT-rectifier output terminal; D1CG-common reference terminal; D2-freewheeling diode;

[0036] EC1-first capacitor; EC2-second capacitor; EC3-third capacitor;

[0037] L1-second inductor; L2-first inductor;

[0038] VIN-power supply voltage input pin;

[0039] ISEN-current signal sampling pin;

[0040] Q-switch tube; QS-source; QD-drain; QG-control electrode;

[0041] TH / SLP-control foot;

[0042] Rth / Rslp-external resistor; RL-parallel resistor; Rcs-sampling resistor;

[0043] LED-light-emitting unit;

[0044] Drain-drain pin;

[0045] AC-AC source; Fuse-fuse. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0047] In the embodiment of the present invention, the chip integrated module may be an AC-DC integrated module, or other chip integrated modules that require additional filters, which will not be described in detail herein. The electromagnetic compatibility may be EMI (ElectroMagneticInterference) electromagnetic compatibility requirements, or other electromagnetic compatibility requirements.

[0048] Embodiment 1

[0049] Take the AC-DC chip module 100' in the chip integrated module as an example. Figure 1As shown, since the AC-DC chip module 100' usually has only a single common ground pin, the filter 210' needs to be connected to the input end of the AC-DC chip module 100', that is, the AC side of the AC-DC chip module 100'. Based on capacitor withstand voltage and safety considerations, the filter 210' needs to use a safety capacitor CX1 (such as an X safety capacitor). However, the safety capacitor CX1 is expensive and large in size, resulting in a significant increase in the volume and cost of the AC-DC chip module after it is connected to the filter 210'. For this reason, a new chip integrated module is urgently needed to meet the increased functional requirements of the product without significantly increasing the volume and cost.

[0050] like Figure 2 As shown, an embodiment of the present invention provides a chip integrated module 100, including: an AC input pin ACIN, a first ground pin GND1, a second ground pin GND2, a rectifier unit D1, a power supply voltage input pin VIN and a logic control unit 10. The rectifier unit D1 has a rectifier input terminal D1IN, a rectifier output terminal D1OUT and a common reference terminal D1CG. The AC input pin ACIN is connected to the rectifier input terminal D1IN, the first ground pin GDN2 is connected to the common reference terminal D1CG, the logic control unit 10 has a ground terminal 14, the second ground pin GND2 is connected to the ground terminal 14 of the logic control unit 10, and the power supply voltage input pin VIN is connected to the rectifier output terminal D1OUT.

[0051] The external circuit connected to the chip integrated module 100 may include a filter 210, and the filter 210 includes a first inductor L2 and a first capacitor EC1. Among them, the chip integrated module 100 includes a second ground pin GND2 and a first ground pin GND1. Since the chip integrated module 100 has two ground pins (GND1 and GND2), when the filter 210 is connected on the basis of the chip integrated module 100, the first inductor L2 of the filter 210 can be connected between the two ground pins GND1 and GND2, and then the first capacitor EC1 of the filter 210 is set between the power supply voltage input pin VIN and the first ground pin GND1, that is, the first capacitor EC1 of the filter 210 is placed at the rear end of the rectifier unit D1, that is, the input AC power is first rectified and then filtered, so that the filter 210 does not need to use safety capacitors but uses electrolytic capacitors or film capacitors to achieve filtering effects, so that the chip integrated module 100 will not significantly increase the cost and volume after connecting the filter 210.

[0052] The AC input pin has two pins, namely Figure 2ACIN1 and ACIN2 are used to connect 220V AC or other volt AC. The rectifier unit D1 can be a rectifier bridge or other rectifier elements, and the rectifier bridge can be a full bridge or a half bridge. The second ground pin GND2 and the first ground pin GND1 are two pins, respectively. Figure 2 The logic control unit 10 is used to determine the output drive instruction according to the input signal to drive the corresponding load 240.

[0053] In addition to the above-mentioned ground terminal 14, the logic control unit 10 also has a current sampling terminal 15, a driving terminal 16 and a threshold adjustment terminal 17. The current sampling terminal 15 is used to input the collected current signal, the driving terminal 16 is used to output the driving instruction, and the threshold adjustment terminal 17 is used to determine the over-temperature protection threshold or the temperature-current curve slope of the chip integrated module according to the resistance value of the external resistor. The threshold adjustment terminal 17 can be based on a control pin and an external resistor connected to the control pin to simultaneously determine the over-temperature protection threshold and the temperature-current curve slope, or it can be based on the first control pin and the first external resistor, and the second control pin and the second external resistor to respectively determine the over-temperature protection threshold and the temperature-current curve slope.

[0054] The chip integrated module 100 also includes a switch tube Q and a current signal sampling pin ISEN. The switch tube Q includes a source QS, a drain QD and a control electrode QG. 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 terminal 16 of the logic control unit 10 is connected to the control electrode QG of the switch tube Q. Combined with the sampled current signal, based on the current current reduction or increase target, the driving signal is output to the control electrode QG of the switch tube Q to control the switch tube Q to be turned off or on, thereby achieving the purpose of adjusting the voltage or current.

[0055] The chip integrated module 100 further includes a freewheeling diode D2 , the anode of which is connected to the rectifier output terminal D1OUT, and the cathode of which is connected to the power supply voltage input pin VIN to prevent damage to components in the chip integrated module 100 due to sudden voltage changes.

[0056] The logic control unit 10 is provided with an over-temperature protection threshold of the chip integrated module 100 and a temperature-current curve slope of the chip integrated module 100. Specifically, Figure 3As shown, the logic control unit 10 may include a temperature detection subunit 11, a control subunit 12 and a driving subunit 13. The temperature detection subunit 11 includes a detection component and an output terminal 111, the detection component is used to detect the current temperature of the chip integrated module 100, and the output terminal 111 of the temperature detection subunit sends a logic signal to the control subunit 12 according to the detected current temperature. The control subunit 12 includes a temperature input terminal 121, a current sampling terminal 15 and a logic output terminal 122, the temperature input terminal 121 is connected to the output terminal 111 of the temperature detection subunit 11, and is used to receive the logic signal sent by the temperature detection subunit 11, and the current sampling terminal 15 is connected to the current signal sampling pin ISEN. The driver unit 13 includes an input terminal 131 and an output terminal 16. The input terminal 131 of the driver unit 13 is connected to the logic output terminal 122 of the control unit 12 to receive the driving signal output by the control unit 12. The output terminal 16 of the driver unit 13 is connected to the control electrode QG of the switch tube Q, and is used to output a driving instruction to the control electrode QG of the switch tube Q according to the received driving signal, and the switch tube Q is turned on or off according to the driving instruction. Obviously, the output terminal 16 of the driver unit 13 is the driver terminal 16 of the logic control unit 10.

[0057] The chip integrated module 100 also includes a first control pin TH, which is used to connect a first external resistor Rth. The control subunit 12 includes a first threshold adjustment terminal (not shown), which is connected to the first control pin Rth; the chip integrated module 100 determines the over-temperature protection threshold according to the resistance value of the first external resistor Rth. The chip integrated module 100 also includes a second control pin SLP, which is used to connect a second external resistor Rslp; the control subunit 12 includes a second threshold adjustment terminal (not shown), which is connected to the second control pin SLP; the logic control unit 10 determines the slope of the temperature-current curve according to the resistance value of the second external resistor Rslp.

[0058] In actual use, the first external resistor Rth and the second external resistor Rslp are adjustable resistors. By adjusting the resistance of the first external resistor Rth, the over-temperature protection threshold is adjusted; by adjusting the resistance of the second external resistor Rslp, the slope of the temperature-current curve is adjusted.

[0059] In an embodiment of the present invention, the first control pin and TH and the second control pin SLP are two independent pins respectively; as a variation, the first control pin TH and the second control pin SLP can also be combined into one control pin, and the first external resistor Rth and the second external resistor Rslp are the same external resistor, thereby achieving the purpose of pin multiplexing on the chip integrated module 100.

[0060] For example, the temperature detection subunit 11 detects the current temperature of the chip integrated module 100, and sends a corresponding logic signal to the control subunit 12 based on the current temperature. The control subunit 12 obtains the corresponding over-temperature protection threshold value based on the resistance value of the first external resistor Rth, and determines whether the current temperature exceeds the over-temperature protection threshold value based on the logic signal. If it exceeds, the temperature needs to be lowered. 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 second external resistor Rslp, and 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 current obtained by sampling, thereby calculating the corresponding drive signal and sending it to the drive subunit 13. The drive subunit 13 generates a drive instruction to drive the switch tube Q to turn on or off based on the drive signal, thereby completing the current regulation.

[0061] like Figure 2 The chip integrated module 100 provided in an embodiment of the present invention, when the first control pin TH and the second control pin SLP are multiplexed, the chip integrated module 100 also includes two AC input pins ACIN1 and ACIN2, two ground pins GND2 and GND1, a current signal sampling pin ISEN, an AC voltage input pin VIN, and a drain pin Drain of the switch tube Q.

[0062] It needs to be said that Figure 2 The figure only shows one arrangement of the pins in the chip integrated module 100 of the present invention, and the position relationship of the pins can be adaptively adjusted according to the actual situation.

[0063] Embodiment 2

[0064] In the prior art, in order to set the over-temperature protection threshold, reference Figure 1 , a control pin TH is required to be connected to an external resistor Rth, and the slope of the temperature-current curve can remain unchanged. If the temperature-current curve line needs to be adjusted, another control pin needs to be set up and connected to another external resistor, that is, the number of pins of the chip integrated module 100' in the prior art is bound to increase with the increase of functions, but the packaging structure usually has restrictions on the number of pins. The above-mentioned embodiment 1 of the present invention introduces that the first control pin TH and the second control pin SLP can be reused, and when the first external resistor Rth and the second external resistor Rslp are reused, the chip integrated module 100 can determine the over-temperature protection threshold and the slope of the temperature-current curve, thereby reducing the number of pins. The embodiment of the present invention specifically explains how to simultaneously determine the over-temperature protection threshold and the slope of the temperature-current curve through pin multiplexing.

[0065] like Figure 2As shown, an embodiment of the present invention provides a chip integrated module 100, including: a control pin TH / SLP and a logic control unit 10, the control pin TH / SLP is connected to the input end of the logic control unit 10, the control pin TH / SLP is used to connect an external resistor Rth / Rslp, the logic control unit 10 is connected to the control pin TH / SLP, and based on a preset mapping relationship, the over-temperature protection threshold and the temperature-current curve slope of the chip integrated module 100 are determined according to the resistance value of the external resistor Rth / Rslp.

[0066] The chip integrated module 100 of the embodiment of the present invention can utilize a control pin TH / SLP to connect an 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, in order to realize two functions, only one control pin TH / SLP can be set, so that the number of pins will not be greatly increased on the basis of satisfying the added functions.

[0067] Among them, the above-mentioned preset mapping relationship includes: based on the mapping relationship between the first resistance value interval and the over-temperature protection value, according to the resistance value of the external resistor Rth / Rslp, determining the over-temperature protection threshold of the chip integrated module 100. The above-mentioned preset mapping relationship also includes: based on the mapping relationship between the second resistance value interval and the slope of the temperature-current curve, according to the resistance value of the external resistor Rth / Rslp, determining the over-temperature protection threshold of the chip integrated module 100.

[0068] The above preset relationship can be pre-set in the logic control unit 10. For example, when the resistance value of the external resistor Rth / Rslp is between 100-200 ohms, the over-temperature protection threshold is A, and when the resistance value of the external resistor Rth / Rslp is between 200-300 ohms, the over-temperature protection threshold is B. If the current resistance value of the external resistor Rth / Rslp is 150 ohms, the over-temperature protection threshold 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 adjustable resistance, which can be adjusted according to the actual needs of the chip integrated module 100.

[0069] Referring to the first embodiment, the current signal sampling pin ISEN of the chip integrated module 100 is used to connect an external sampling resistor Rcs to collect the current in the control circuit 200. Figure 3As shown, the logic control unit 10 includes a temperature detection subunit 11, a control subunit 12 and a driving subunit 13. The temperature detection subunit 11 is used to detect the current temperature of the chip integrated module 100 and generate a logic signal according to the current temperature. The control subunit 12 includes a temperature input terminal 121, a threshold adjustment terminal 17, a current sampling terminal 15 and a logic output terminal 122. The output terminal 111 of the temperature detection subunit 11 is connected to the temperature input terminal 121 of the control subunit 12. The temperature detection subunit 11 detects the current temperature of the chip integrated module 100 and generates a corresponding logic signal. The logic signal enters the control subunit 12 from the output terminal 111 of the temperature detection subunit 11 through the temperature input terminal 121 of the control subunit 12. That is, the logic control unit 10 can use its threshold adjustment terminal 17 to connect the external resistor Rth / Rslp, and then determine the resistance value of the external resistor Rth / Rslp. The current sampling terminal 15 of the control subunit 12 is connected to the current signal sampling pin ISEN, that is, the logic control unit 10 can use its current sampling terminal 15 to connect the sampling resistor Rcs set outside the chip integrated module 100, and then sample the current in the control circuit 200. The logic output terminal 122 of the control subunit 12 is connected to the input terminal of the driving subunit 13, and the driving signal of the control subunit 12 is output to the driving subunit 13 through the logic output terminal. The output terminal of the driving subunit 13 is the driving terminal 16 of the logic control unit 10. Specifically, the driving subunit 13 generates a driving instruction according to the received driving signal, which is used to drive the switch tube Q to turn off or on.

[0070] Specifically, the control subunit 12 determines whether the current needs to be adjusted according to the logic signal sent by the temperature detection subunit 11 , the sampled current of the control circuit 200 , and the resistance value of the external resistor Rth / Rslp, and then sends a driving signal to the driving subunit 13 .

[0071] For example, the temperature detection 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 value according to the resistance value of the external resistor Rth / Rslp, and determines whether the current temperature exceeds the over-temperature protection threshold value based on the logic signal. If it exceeds, it is necessary to cool down. At the same time, the temperature-current curve slope of the chip integrated module 100 is obtained based on the resistance value of the external resistor Rth / Rslp. According to the temperature value to be reduced or the target temperature value and the current current obtained by sampling, it is determined how much current value needs to be adjusted, and the corresponding drive signal is calculated and sent to the drive subunit 13. The drive subunit 13 generates a drive instruction to drive the switch tube Q to turn on or off according to the drive signal, thereby completing the current regulation.

[0072] Embodiment 3

[0073] like Figure 4 As shown, an embodiment of the present invention provides a control circuit 200, including a filter 210 and the chip integrated module 100 mentioned in the above embodiment 1. The filter 210 may be an EMI filter, or other types of filters.

[0074] The filter 210 includes a first inductor L2 and a first capacitor EC1. The first inductor L2 is used to achieve filtering. Its two ends are respectively connected to the second ground pin GND2 and the first ground pin GND1 of the chip integrated module 100. The second ground pin GND2 and the first ground pin GND1 are respectively grounded. The positive electrode of the first capacitor EC1 is connected to the power supply voltage input pin VIN, and the negative electrode of the first capacitor EC1 is connected to the second ground pin GND2.

[0075] In the embodiment of the present invention, the first capacitor EC1 of the filter 210 is arranged between the power supply voltage input pin VIN and the first ground pin GND1, that is, the first capacitor EC1 of the filter 210 is placed at the rear end of the rectifier unit D1, that is, the input AC power is first rectified and then filtered, so that the filter 210 does not need to use safety capacitors but uses electrolytic capacitors or film capacitors to achieve the filtering effect. Compared with the existing technology, the chip integrated module 100 can achieve the filtering function after connecting the filter 210 without significantly increasing the cost and volume.

[0076] The control circuit 200 further includes a sampling resistor Rcs, and the sampling resistor Rcs is connected between the current signal sampling pin ISEN and the second ground pin GND2 to implement sampling of the current in the circuit.

[0077] The embodiment of the present invention provides a control circuit 200, comprising an external resistor Rth / Rslp, a first ground pin GND1 and a chip integrated module 100 as described in Embodiment 1. The external resistor Rth / Rslp is connected between the control pin TH / SLP and the second ground pin GND2, 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.

[0078] 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, in order to realize two functions, only one external resistor Rth / Rslp can be set, so that the number of pins will not be greatly increased on the basis of satisfying the added functions.

[0079] As a variation, when the over-temperature protection threshold and the temperature-current curve slope are set by using two control pin external resistors respectively: the chip integrated module 100 further includes a first control pin TH, and the logic control unit 10 is connected to the first control pin TH. The control circuit 200 includes a first external resistor Rth, which is connected between the first control pin TH and the second ground pin GND2, and the logic control unit 10 determines the over-temperature protection threshold of the chip integrated module 100 according to the resistance value of the first external resistor Rth; the chip integrated module 100 further includes a second control pin SLP, and the logic control unit 10 is connected to the second control pin SLP. The control circuit 200 includes a second external resistor Rslp, which is connected between the second control pin SLP and the second ground pin GND2, and the logic control unit 10 determines the temperature-current curve slope of the chip integrated module 100 according to the resistance value of the second external resistor Rslp.

[0080] The control circuit 200 further includes a chopper 220 , which is connected between the chip integrated module 100 and a load 240 , so that the voltage output to the load 240 is variable.

[0081] The above-mentioned chip integrated module 100 includes a switch tube Q, and the switch tube Q includes a drain QD; the chopper 220 includes a second inductor L1 and a second capacitor EC2, and the second inductor L1 is connected between the drain QD and the load 240; the positive electrode of the second capacitor EC2 is connected to the power supply voltage input pin, and the negative electrode of the second capacitor EC2 is connected to the second ground pin GND2.

[0082] In addition, the control circuit 200 also includes an AC module 230, which includes an AC source AC and a fuse Fuse. The AC source is connected to the AC input pin ACIN; the fuse Fuse is connected between the AC source AC and the AC input pin ACIN to disconnect when the current exceeds a specified value, thereby protecting the chip integrated module 100.

[0083] In the embodiment of the present invention, the load 240 may include an LED light emitting unit, or other components that need to be powered by direct current. Figure 4 The load 240 includes a third capacitor EC3 and a parallel resistor RL which are arranged in parallel with the LED light emitting unit.

[0084] Embodiment 3

[0085] An embodiment of the present invention provides a lighting device, which includes a light-emitting unit LED and the control circuit in the second embodiment, wherein the control circuit is used to input direct current to the light-emitting unit LED, and the light-emitting unit is used to emit lighting light.

[0086] It should be understood by those skilled in the art that, although the preferred embodiments of the present invention have been described, other changes and modifications may be made to these embodiments once those skilled in the art have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0087] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope of the present invention. Thus, if these 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 these modifications and variations.

Claims

1. A chip integrated module, characterized in that: include: An AC input pin, a first ground pin, a second ground pin, a rectifier unit, a power supply voltage input pin and a logic control unit, wherein the rectifier unit has a rectifier input terminal, a rectifier output terminal and a common reference terminal, wherein the AC input pin is connected to the rectifier input terminal, the first ground pin is connected to the common reference terminal, the logic control unit has a ground terminal, and the second ground pin is connected to the ground terminal; the power supply voltage input pin is connected to the rectifier output terminal.

2. The chip integrated module according to claim 1, characterized in that: The chip integrated module also includes a switch tube and a current signal sampling pin, the switch tube includes a source and a control electrode, the logic control unit has a current sampling end and a driving end, the source electrode is connected to the current signal sampling pin and the current sampling end, and the driving end is connected to the control electrode to control the switch tube to be turned off or on.

3. The chip integrated module according to claim 1, characterized in that: The chip integrated module further comprises a freewheeling diode, wherein the positive electrode of the freewheeling diode is connected to the rectifier output terminal, and the negative electrode of the freewheeling diode is connected to the power supply voltage input pin.

4. The chip integrated module according to claim 2, characterized in that: The logic control unit is provided with an over-temperature protection threshold of the chip integrated module and a temperature-current curve slope of the chip integrated module; the logic control unit includes a temperature detection subunit, a control subunit and a drive subunit; The control subunit has a temperature input terminal, the current sampling terminal and a logic output terminal, the temperature input terminal is connected to the temperature detection subunit, and the logic output terminal is connected to the driving subunit to output a driving signal to the driving subunit; The temperature detection subunit is used to detect the temperature of the chip integrated module and send a logic signal to the control subunit. The driving subunit is connected between the logic output terminal and the control electrode of the switch tube.

5. The chip integrated module according to claim 4, characterized in that: The chip integrated module also includes a first control pin, which is used to connect a first external resistor; the control subunit includes a first threshold adjustment end, which is connected to the first control pin; the chip integrated module determines the over-temperature protection threshold according to the resistance value of the first external resistor.

6. The chip integrated module according to claim 4, characterized in that: The chip integrated module also includes a second control pin, which is used to connect a second external resistor; the control subunit includes a second threshold adjustment end, which is connected to the second control pin; the logic control unit determines the slope of the temperature-current curve according to the resistance value of the second external resistor.

7. A control circuit, characterized in that: It comprises a filter and a chip integrated module as described in any one of claims 1 or 3, wherein the filter comprises a first inductor and a first capacitor, wherein two ends of the first inductor are respectively connected to the second ground pin and the first ground pin, and the second ground pin and the first ground pin are grounded; the positive electrode of the first capacitor is connected to the power supply voltage input pin, and the negative electrode of the first capacitor is connected to the second ground pin.

8. The control circuit according to claim 7, characterized in that: The chip integrated module further includes a current signal sampling pin, and the control circuit includes a sampling resistor, and the sampling resistor is connected between the current signal sampling pin and the second ground pin.

9. The control circuit according to claim 7, characterized in that: The chip integrated module also includes a first control pin; the control circuit includes a first external resistor, the first external resistor is connected between the first control pin and the second ground pin, and the chip integrated module determines the over-temperature protection threshold according to the resistance value of the first external resistor.

10. The control circuit according to claim 7, characterized in that: The chip integrated module also includes a second control pin; The control circuit includes a second external resistor, which is connected between the second control pin and the second ground pin. The chip integrated module determines the slope of the temperature-current curve according to the resistance value of the second external resistor.

11. The control circuit according to claim 7, characterized in that: The control circuit further includes a chopper, which is connected between the chip integrated module and a load.

12. The control circuit according to claim 11, characterized in that: The chip integrated module includes a switch tube, and the switch tube includes a drain; The chopper includes a second inductor and a second capacitor, wherein the second inductor is connected between the drain and the load; the positive electrode of the second capacitor is connected to the supply voltage input pin, and the negative electrode of the second capacitor is connected to the second ground pin.

13. The control circuit according to claim 7, characterized in that: The control circuit further comprises an AC module, wherein the AC module comprises an AC source and a fuse, wherein the AC source is connected to the AC input pin; and the fuse is connected between the AC source and the AC input pin.

14. A lighting device, characterized in that: It comprises a light-emitting unit and a control circuit as described in any one of claims 7 to 13, wherein the control circuit is used to input direct current to the light-emitting unit.

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