Mini LED backlight power supply driving circuit

Abstract

The utility model relates to a Mini LED backlight power supply driving circuit. The Mini LED backlight power supply driving circuit comprises an input module, a main control module and an output module, the input module comprises a power supply unit, a first anti-interference unit and a second anti-interference unit, the first anti-interference unit is electrically connected with the power supply unit, the second anti-interference unit is electrically connected with the first anti-interference unit, and the main control module is electrically connected with the second anti-interference unit; and the output module is electrically connected with the main control module. According to the scheme provided by the invention, the anti-interference capability of the LED backlight module can be improved, and normal picture display of the liquid crystal television is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a television technology field especially a kind of Mini LED backlight power supply driving circuit. BACKGROUND

[0002] Mini LED technology is a kind of display technology, it can realize higher brightness, contrast and more delicate display effect.

[0003] In related technologies, the switching power supply circuit of the LED backlight module of the present stage is connected with the whole machine power module of liquid crystal television, when the liquid crystal television is affected by power grid fluctuation, LED backlight source will be affected, LED backlight module cannot be stably controlled output, thereby affecting liquid crystal picture flicker cannot be normally output. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiency in prior art, provide a kind of Mini LED backlight power supply driving circuit, can improve the anti-interference ability of LED backlight module, ensure that liquid crystal television picture display is normal.

[0005] The utility model aims at overcoming the deficiency in prior art, provide a kind of Mini LED backlight power supply driving circuit, can improve the anti-interference ability of LED backlight module, ensure that liquid crystal television picture display is normal.

[0006] The first aspect of the application provides a Mini LED backlight power supply driving circuit, comprising: an input module, including a power supply unit, a first anti-interference unit and a second anti-interference unit, the first anti-interference unit includes a capacitor PCX101, a capacitor PCY103, an inductor PLF103 and a capacitor PCY104, the power supply unit is electrically connected with the capacitor PCX101, the first end of the capacitor PCY103 is electrically connected with the capacitor PCX101 and the inductor PLF103 respectively, the second end of the capacitor PCY103 is grounded, the first end of the capacitor PCY104 is electrically connected with the capacitor PCX101 and the inductor PLF103 respectively, the second end of the capacitor PCY104 is grounded, the second anti-interference unit includes a capacitor PCX102, an inductor PLF101, a capacitor PCY107 and a capacitor PCY101, the capacitor PCX102 is electrically connected with the inductor PLF103, the inductor PLF101 is electrically connected with the capacitor PCX102, the first end of the capacitor PCY107 is electrically connected with the inductor PLF101, the second end of the capacitor PCY107 is grounded, the first end of the capacitor PCY101 is electrically connected with the inductor PLF101, and the second end of the capacitor PCY101 is grounded; a main control module is electrically connected with the inductor PLF101; an output module is electrically connected with the main control module.

[0007] The power supply unit includes a power terminal, a fuse PF101, a fuse PF102 and a pressure sensitive resistor PRV01, a first end of the fuse PF101 is electrically connected with the power terminal, a second end of the fuse PF101 is electrically connected with the pressure sensitive resistor PRV01, a first end of the fuse PF102 is electrically connected with the power terminal, a second end of the fuse PF102 is electrically connected with the pressure sensitive resistor PRV01, the pressure sensitive resistor PRV01 is electrically connected with the capacitor PCX101.

[0008] The main control module includes a rectifier PBD101, a resistor PR124, a resistor PR122, a capacitor PC113 and a chip PU101, the rectifier PBD101 is electrically connected with the inductor PLF101, a first end of the resistor PR124 is electrically connected with the rectifier PBD101, a second end of the resistor PR124 is electrically connected with a first end of the resistor PR122, a second end of the resistor PR122 is electrically connected with the chip PU101, a first end of the capacitor PC113 is electrically connected with the chip PU101, a second end of the capacitor PC113 is grounded.

[0009] The main control module further includes a thermistor PRT101, a diode PD816 and a transformer T1, a first end of the thermistor PRT101 is electrically connected with the rectifier PBD101, a second end of the thermistor PRT101 is electrically connected with a first end of the diode PD816, a second end of the diode PD816 is electrically connected with the transformer T1.

[0010] The main control module further includes a capacitor PEC01, a resistor PR102, a resistor PR103 and a resistor PR111, a first end of the capacitor PEC01 is electrically connected with a second end of the diode PD816 and a first end of the resistor PR102 respectively, a second end of the resistor PR102 is electrically connected with a first end of the resistor PR103, a second end of the resistor PR103 is electrically connected with a first end of the resistor PR111, a second end of the resistor PR111 is electrically connected with the chip PU101.

[0011] The main control module further includes a capacitor PC1070, a resistor PR120, a resistor PR929 and a MOS tube PQ417, a first end of the capacitor PC1070 is electrically connected with a first end of the resistor RR120, a second end of the capacitor PC1070 is electrically connected with a first end of the resistor PR929, a second end of the resistor RR120 is electrically connected with the chip PU101, a second end of the resistor PR929 is electrically connected with the MOS tube PQ417.

[0012] The master control module further comprises a resistor PR107 and a MOS tube PQ102, a first end of the resistor PR107 is electrically connected with the MOS tube PQ417, and a second end of the resistor PR107 is electrically connected with the MOS tube PQ102.

[0013] The master control module further comprises an optoelectronic coupler PU204, which is electrically connected with the chip PU101.

[0014] The output module comprises a capacitor PC1, a capacitor PC2, a capacitor PC001, a capacitor PC002, a capacitor PC005 and a capacitor PC006, a first end of the capacitor PC1 is electrically connected with the transformer T1, a second end of the capacitor PC1 is grounded, a first end of the capacitor PC2 is electrically connected with the transformer T1, a second end of the capacitor PC1 is grounded, a first end of the capacitor PC001 is electrically connected with the transformer T1, a second end of the capacitor PC001 is grounded, a first end of the capacitor PC002 is electrically connected with the transformer T1, a second end of the capacitor PC002 is grounded, a first end of the capacitor PC005 is electrically connected with the transformer T1, a second end of the capacitor PC005 is grounded, a first end of the capacitor PC006 is electrically connected with the transformer T1, and a second end of the capacitor PC006 is grounded.

[0015] The output module further comprises a diode PD820 and a diode PD819, the diode PD820 is electrically connected with the transformer T1, and the diode PD819 is electrically connected with the transformer T1.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] Through the first anti-interference unit and the second anti-interference unit, twice EMI noise reduction can be formed, so that the interference signal in the AC power grid is filtered out, and the picture display of the liquid crystal television is ensured to be normal. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment.

[0019] Figure 1 It is the functional module diagram of the Mini LED backlight power supply driving circuit in an embodiment of the utility model;

[0020] Figure 2 It is the circuit diagram of the Mini LED backlight power supply driving circuit in an embodiment of the utility model. DETAILED DESCRIPTION

[0021] Embodiments of the present application will be described in more detail by referring to the drawings. Although the embodiments of the present application are shown in the drawings, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0022] It should be understood that, although the terms "first", "second", "third", etc. can be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one piece of information from another piece of information of the same type. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information, without departing from the scope of the present application. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0023] Unless otherwise explicitly and specifically defined, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected or integrated; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] Please refer to Figure 1 and Figure 2The application discloses a Mini LED backlight power supply driving circuit, which comprises an input module 100, a main control module 200 and an output module 300. The input module 100 comprises a power supply unit, a first anti-interference unit and a second anti-interference unit. The first anti-interference unit comprises a capacitor PCX101, a capacitor PCY103, an inductor PLF103 and a capacitor PCY104. The power supply unit is electrically connected with the capacitor PCX101. The first end of the capacitor PCY103 is electrically connected with the capacitor PCX101 and the inductor PLF103 respectively. The second end of the capacitor PCY103 is grounded. The first end of the capacitor PCY104 is electrically connected with the capacitor PCX101 and the inductor PLF103 respectively. The second end of the capacitor PCY104 is grounded. The second anti-interference unit comprises a capacitor PCX102, an inductor PLF101, a capacitor PCY107 and a capacitor PCY101. The capacitor PCX102 is electrically connected with the inductor PLF103. The inductor PLF101 is electrically connected with the capacitor PCX102. The first end of the capacitor PCY107 is electrically connected with the inductor PLF101. The second end of the capacitor PCY107 is grounded. The first end of the capacitor PCY101 is electrically connected with the inductor PLF101. The second end of the capacitor PCY101 is grounded. The main control module 200 is electrically connected with the inductor PLF101. The output module 300 is electrically connected with the main control module 200.

[0025] It should be noted that the capacitor PCX101 is used for eliminating differential mode interference in alternating current, the inductor PLF103 is a common mode inductor and is used for inhibiting EMI radiation interference generated by input alternating current, meanwhile, the capacitor PCY104 and the capacitor PCY103 are used for eliminating differential mode interference and play a first EMI noise reduction function. Further, the capacitor PCX102 also plays a role of eliminating interference signals in alternating current and is connected with the input end of the common mode inductor PLF101. In addition, the other two ends of the capacitor PCY107 and the capacitor PCY101 are connected with two safety capacitors to play a second EMI noise reduction function. In this way, through the above-mentioned first anti-interference unit and the second anti-interference unit, twice EMI noise reduction can be formed, so that interference signals in an alternating current network can be filtered out and the picture display of a liquid crystal television is ensured to be normal.

[0026] Please refer to Figure 2 In an embodiment, the power supply unit comprises a power supply terminal, a fuse PF101, a fuse PF102 and a pressure sensitive resistor PRV01. The first end of the fuse PF101 is electrically connected with the power supply terminal. The second end of the fuse PF101 is electrically connected with the pressure sensitive resistor PRV01. The first end of the fuse PF102 is electrically connected with the power supply terminal. The second end of the fuse PF102 is electrically connected with the pressure sensitive resistor PRV01. The pressure sensitive resistor PRV01 is electrically connected with the capacitor PCX101.

[0027] It should be noted that the power terminal is externally connected to AC 220V, and the fuses PF101 and PF102 can be fused to protect the circuit from burning out when the power grid fluctuates. The voltage-dependent resistor PRV01 is connected between the live wire and the neutral wire to prevent high voltage surges from damaging the board and absorbing pulse current to protect the subsequent circuit.

[0028] It should also be noted that the input module 100 further comprises a plurality of bridge resistors, specifically including bridge resistors RP126, RP127, RP128, and RP129, which form a bridge resistor equivalent circuit to balance the input impedance and adjust the current and voltage, effectively controlling the input current and preventing excessive current from damaging the rectifier bridge.

[0029] Please refer to Figure 2 In an embodiment, the main control module 200 includes a rectifier PBD101, a resistor PR124, a resistor PR122, a capacitor PC113, and a chip PU101. The rectifier PBD101 is electrically connected to the inductor PLF101. The first end of the resistor PR124 is electrically connected to the rectifier PBD101. The second end of the resistor PR124 is electrically connected to the first end of the resistor PR122. The second end of the resistor PR122 is electrically connected to the chip PU101. The first end of the capacitor PC113 is electrically connected to the chip PU101. The second end of the capacitor PC113 is grounded.

[0030] Specifically, the main control module 200 further comprises a thermistor PRT101, a diode PD816, and a transformer T1. The first end of the thermistor PRT101 is electrically connected to the rectifier PBD101. The second end of the thermistor PRT101 is electrically connected to the first end of the diode PD816. The second end of the diode PD816 is electrically connected to the transformer T1.

[0031] Specifically, the main control module 200 further comprises a capacitor PEC01, a resistor PR102, a resistor PR103, and a resistor PR111. The first end of the capacitor PEC01 is electrically connected to the second end of the diode PD816 and the first end of the resistor PR102, respectively. The second end of the resistor PR102 is electrically connected to the first end of the resistor PR103. The second end of the resistor PR103 is electrically connected to the first end of the resistor PR111. The second end of the resistor PR111 is electrically connected to the chip PU101.

[0032] Specifically, the main control module 200 further comprises a capacitor PC1070, a resistor PR120, a resistor PR929 and a MOS tube PQ417, a first end of the capacitor PC1070 is electrically connected with a first end of the resistor RR120, a second end of the capacitor PC1070 is electrically connected with a first end of the resistor PR929, a second end of the resistor RR120 is electrically connected with the chip PU101, and a second end of the resistor PR929 is electrically connected with the MOS tube PQ417.

[0033] Specifically, the main control module 200 further comprises a resistor PR107 and a MOS tube PQ102, a first end of the resistor PR107 is electrically connected with the MOS tube PQ417, and a second end of the resistor PR107 is electrically connected with the MOS tube PQ102.

[0034] Specifically, the main control module 200 further comprises an optoelectronic coupler PU204, which is electrically connected with the chip PU101.

[0035] Please refer to Figure 2 In an embodiment, the output module 300 comprises a capacitor PC1, a capacitor PC2, a capacitor PC001, a capacitor PC002, a capacitor PC005 and a capacitor PC006, a first end of the capacitor PC1 is electrically connected with the transformer T1, a second end of the capacitor PC1 is grounded, a first end of the capacitor PC2 is electrically connected with the transformer T1, a second end of the capacitor PC1 is grounded, a first end of the capacitor PC001 is electrically connected with the transformer T1, a second end of the capacitor PC001 is grounded, a first end of the capacitor PC002 is electrically connected with the transformer T1, a second end of the capacitor PC002 is grounded, a first end of the capacitor PC005 is electrically connected with the transformer T1, a second end of the capacitor PC005 is grounded, a first end of the capacitor PC006 is electrically connected with the transformer T1, and a second end of the capacitor PC006 is grounded.

[0036] Please refer to Figure 2 In an embodiment, the output module 300 further comprises a diode PD820 and a diode PD819, the diode PD820 is electrically connected with the transformer T1, and the diode PD819 is electrically connected with the transformer T1.

[0037] It should be noted that, as Figure 2 shown, the rectifier PBD101, the capacitor PC102, the inductor PL101, the thermistor PRT101, the diode PD816, the capacitor PEC01 and the resistor PR120 constitute a PFC circuit, which is an electronic circuit for improving the power factor between the alternating current power supply and the load, and can improve the energy utilization efficiency, reduce the harmonic pollution of the power grid, reduce the burden of the power grid, suppress the interference of harmonics to other equipment, and improve the efficiency and stability of the entire power system.

[0038] The circuit principle of the present application is described as follows:

[0039] The battery terminal connects the AC 220V power supply to provide starting voltage for the power drive circuit. First, the hot line and the zero line are connected with the fuse PF101 and the fuse PF102 respectively, which can melt and protect the circuit from burning when the current is large. The pressure sensitive resistor PRV01 is connected between the hot line and the zero line, which can prevent high voltage surge from destroying the board and absorb pulse current to protect the next stage circuit. The capacitor PCX101 is used to eliminate the differential mode interference in AC, and the common mode inductor PLF103 is used to suppress the EMI radiation interference generated by the input AC. At the same time, the capacitor PCY103 and the capacitor PCY104 are used to eliminate the differential mode interference, which plays a role in the first level EMI noise reduction function. Further, the bridge resistor RP126, the bridge resistor RP127, the bridge resistor RP128 and the bridge resistor RP129 constitute a bridge resistor equivalent circuit, which plays a role in balancing the input impedance and adjusting the current and voltage, effectively controls the input current and prevents the damage to the rectifier bridge caused by excessive current. The capacitor PCX102 is connected to the back end of the bridge resistor, which also eliminates the interference signal in AC, and is connected to the input end of the common mode inductor PLF101. The other two ends are connected with the capacitor PCY107 and the capacitor PCY101, which play a role in the second level EMI noise reduction function, and finally provide the rectifier PBD101 for AC / DC conversion work, so as to realize the product input module 100 to complete the filtering of the interference signal in the AC power grid and prevent the crosstalk from affecting the output stability of the switching power supply.

[0040] The rectifier PBD101 is connected with the resistor PR124, the resistor PR122 and the capacitor PC113 to provide a starting voltage for the 1Pin of the chip PU101, so as to work the built-in circuit; the output of the rectifier PBD101 is firstly filtered by the capacitor PC102 to the ground, and then is connected with the energy storage charge of the inductor PL101, so as to provide the shape and phase of the input current for the MOS switch circuit, and make it work synchronously with the input voltage; the rectifier PBD101 is also connected with the thermistor PRT101 and the one-way conductive diode PD816 to charge the positive electrode of the electrolytic capacitor PEC01. When the electrolytic capacitor PEC01 discharges, the current is transmitted to the high-voltage MOS circuit in one way, and is transmitted to the 2Pin of the chip PU101 through the resistor PR102, the resistor PR103 and the resistor PR111 in another way, and is connected with the external resistor PR116 and the capacitor PC110 to reduce the voltage. The 3Pin of the chip PU101 is connected with one end of the capacitor PC102 through the voltage dividing resistor PR117, the resistor PR115 and the capacitor PC109, so as to detect the current input control signal of the PFC peripheral circuit. After the capacitor PC1070 is connected in series, the voltage is transmitted to the current limiting resistor PR929 connected with the MOS tube PQ417, so as to control the working state of the MOS tube PQ417. When the MOS tube PQ417 is in the state of cutting off, the voltage is transmitted to the MOS tube PQ102 through the resistor PR107, so that the MOS tube PQ417 and the MOS tube PQ102 work in cooperation. The gate of the MOS tube PQ417 and the MOS tube PQ102 is controlled by the 5Pin of the chip PU101, and is connected with the resistor PR930, the resistor PR928, the resistor PR109, the resistor PR106, the diode PD818 and the diode PD111 to control the state of the MOS tube. The 6Pin of the chip PU101 controls the gate drive circuit of the low-voltage MOS tube PQ104, and the 9Pin controls the gate drive circuit of the high-voltage MOS tube PQ101. The diode PD817 is connected with the input of the high-voltage and low-voltage MOS circuit, so as to provide the working voltage for the transformer in cooperation with the high-voltage and low-voltage MOS tube, the PFC circuit and the chip PU101. The 8Pin of the chip PU101 is connected with the current limiting resistor PR120, and is connected with one end of the inductor PL101 and the drain of the MOS tube PQ417 and the MOS tube PQ102, so as to detect the working state of the PFC circuit and provide the OVP protection.The 6Pin of the chip PU101 is also connected to the 10Pin through the diode PD109 and the resistor PR131, providing voltage to the input of the built-in driver, and the external bootstrap capacitor PC121 is connected to the 11Pin together with the high and low voltage MOS circuit half-bridge node input, which is used for high and low voltage MOS circuit reference detection input; the built-in high voltage starting power supply of the chip PU101 is connected to the capacitor PC124 and the capacitor PC106 through the 13Pin output filtering, and then connected to the winding of the transformer T1 through the voltage stabilizing tube PD815; the 14Pin voltage detection of the chip PU101 is connected to the ground through the external resistor PR139, the capacitor PC101 and the capacitor PC105, and then connected to the primary winding of the transformer T1 after being filtered to the ground through the resistor PR132, the resistor PR142 and the capacitor PC111; the 15Pin of the chip PU101 is connected to the primary winding of the transformer T1 through the external resistance-capacitance resonance circuit, and detects the current input of the PFC circuit; the feedback voltage output by the transformer T1 is compared with the reference voltage between the resistor PR222 and the resistor PR218 by using the optoelectronic coupler PU204, the feedback voltage collected by the 1.2Pin of the optoelectronic coupler PU204 is optoelectronically converted, and then output through the 4Pin after being filtered by the voltage stabilizing tube PZD101 and the capacitor PC348, and finally connected to the 16Pin of the chip PU101 for voltage feedback control.

[0041] After the primary winding of the transformer T1 receives the voltage transmitted by the PFC circuit and the signal input of the chip PU101, the internal turns ratio changes alternately by magnetic mutual inductance, so that the electromagnetic induction generates alternating magnetic flux, and two groups of "sine type" direct currents are output by the secondary winding, and then the alternating interference is eliminated by the filtering capacitors PC1, PC2, PC001, PC002, PC005 and PC006, and then the half-bridge rectifier diodes PD819 and PD820 are connected to convert and output direct current voltage, which is transmitted to the PCON102 output port to provide working voltage for the Mini LED backlight module.

[0042] The solutions of the present application have been described in detail above with reference to the drawings. In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments. Those skilled in the art should also know that the actions and modules involved in the specification are not necessarily required by the present application. In addition, it can be understood that the steps in the method embodiments of the present application can be adjusted, combined and reduced in sequence according to actual needs, and the modules in the device embodiments of the present application can be combined, divided and reduced according to actual needs.

[0043] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.

Claims

1. A Mini LED backlight power supply driving circuit, characterized in that, The input module comprises a power supply unit, a first anti-interference unit and a second anti-interference unit, the first anti-interference unit comprises a capacitor PCX101, a capacitor PCY103, an inductor PLF103 and a capacitor PCY104, the power supply unit is electrically connected with the capacitor PCX101, the first end of the capacitor PCY103 is electrically connected with the capacitor PCX101 and the inductor PLF103 respectively, the second end of the capacitor PCY103 is grounded, the first end of the capacitor PCY104 is electrically connected with the capacitor PCX101 and the inductor PLF103 respectively, the second end of the capacitor PCY104 is grounded, the second anti-interference unit comprises a capacitor PCX102, an inductor PLF101, a capacitor PCY107 and a capacitor PCY101, the capacitor PCX102 is electrically connected with the inductor PLF103, the inductor PLF101 is electrically connected with the capacitor PCX102, the first end of the capacitor PCY107 is electrically connected with the inductor PLF101, the second end of the capacitor PCY107 is grounded, the first end of the capacitor PCY101 is electrically connected with the inductor PLF101, and the second end of the capacitor PCY101 is grounded. The main control module is electrically connected with the inductor PLF101. The output module is electrically connected with the main control module. The power supply unit comprises a power terminal, a fuse PF101, a fuse PF102 and a pressure sensitive resistor PRV01, the first end of the fuse PF101 is electrically connected with the power terminal, the second end of the fuse PF101 is electrically connected with the pressure sensitive resistor PRV01, the first end of the fuse PF102 is electrically connected with the power terminal, the second end of the fuse PF102 is electrically connected with the pressure sensitive resistor PRV01, and the pressure sensitive resistor PRV01 is electrically connected with the capacitor PCX101.

2. The Mini LED backlight power supply driving circuit of claim 1, wherein, The main control module comprises a rectifier PBD101, a resistor PR124, a resistor PR122, a capacitor PC113 and a chip PU101, the rectifier PBD101 is electrically connected with the inductor PLF101, the first end of the resistor PR124 is electrically connected with the rectifier PBD101, the second end of the resistor PR124 is electrically connected with the first end of the resistor PR122, the second end of the resistor PR122 is electrically connected with the chip PU101, the first end of the capacitor PC113 is electrically connected with the chip PU101, and the second end of the capacitor PC113 is grounded.

3. The Mini LED backlight power supply driving circuit of claim 1, wherein, The main control module further comprises a thermistor PRT101, a diode PD816 and a transformer T1, the first end of the thermistor PRT101 is electrically connected with the rectifier PBD101, the second end of the thermistor PRT101 is electrically connected with the first end of the diode PD816, and the second end of the diode PD816 is electrically connected with the transformer T1.

4. The Mini LED backlight power supply driving circuit of claim 3, wherein, ​ 5. The Mini LED backlight power supply driving circuit of claim 4, wherein, The master control module further comprises a capacitor PEC01, a resistor PR102, a resistor PR103 and a resistor PR111, a first end of the capacitor PEC01 is electrically connected with a second end of the diode PD816 and a first end of the resistor PR102 respectively, a second end of the resistor PR102 is electrically connected with a first end of the resistor PR103, a second end of the resistor PR103 is electrically connected with a first end of the resistor PR111, and a second end of the resistor PR111 is electrically connected with the chip PU101.

6. The Mini LED backlight power supply driving circuit of claim 5, wherein, The master control module further comprises a capacitor PC1070, a resistor PR120, a resistor PR929 and a MOS tube PQ417, a first end of the capacitor PC1070 is electrically connected with a first end of the resistor RR120, a second end of the capacitor PC1070 is electrically connected with a first end of the resistor PR929, a second end of the resistor RR120 is electrically connected with the chip PU101, and a second end of the resistor PR929 is electrically connected with the MOS tube PQ417.

7. The Mini LED backlight power supply driving circuit of claim 6, wherein, The master control module further comprises a resistor PR107 and a MOS tube PQ102, a first end of the resistor PR107 is electrically connected with the MOS tube PQ417, and a second end of the resistor PR107 is electrically connected with the MOS tube PQ102.

8. The Mini LED backlight power supply driving circuit of claim 6, wherein, The master control module further comprises an optoelectronic coupler PU204, which is electrically connected with the chip PU101.

9. The Mini LED backlight power supply driving circuit of claim 4, wherein, The output module comprises a capacitor PC1, a capacitor PC2, a capacitor PC001, a capacitor PC002, a capacitor PC005 and a capacitor PC006, a first end of the capacitor PC1 is electrically connected with the transformer T1, a second end of the capacitor PC1 is grounded, a first end of the capacitor PC2 is electrically connected with the transformer T1, a second end of the capacitor PC1 is grounded, a first end of the capacitor PC001 is electrically connected with the transformer T1, a second end of the capacitor PC001 is grounded, a first end of the capacitor PC002 is electrically connected with the transformer T1, a second end of the capacitor PC002 is grounded, a first end of the capacitor PC005 is electrically connected with the transformer T1, a second end of the capacitor PC005 is grounded, a first end of the capacitor PC006 is electrically connected with the transformer T1, and a second end of the capacitor PC006 is grounded.

10. The Mini LED backlight power supply driving circuit of claim 9, wherein, The output module further comprises a diode PD820 and a diode PD819, the diode PD820 is electrically connected with the transformer T1, and the diode PD819 is electrically connected with the transformer T1.

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