Power-on-controllable digital processing module power supply circuit with multiple power supplies

Abstract

The utility model provides a digital processing module power supply circuit with multiple paths of power supplies and controllable power-on, comprising a first DC / DC converter configured to be connected with a + 5V power supply and to convert and output + 1V and + 1.8 V voltage and 13A current in a voltage stabilizing manner, a second DC / DC converter configured to be connected with a + 5V power supply, and a third DC / DC converter configured to convert and stabilize voltage and 13A current, the second DC / DC converter is configured to be connected with a + 5V power supply and to convert and output + 1.8 V, + 1.2 V, + 1.6 V and + 3.3 V voltages and 4A current in a voltage stabilizing manner; the power supply output sequence control circuit is configured to be respectively connected with the first DC / DC converter and the second DC / DC converter and is used for controlling the output sequence of the six paths of power supplies output by the first DC / DC converter and the second DC / DC converter; the linear voltage regulator is configured to be connected with a + 3.3 V power supply and output + 1.8 V analog voltage through conversion and voltage stabilization; and the first filter circuit is configured to be connected with a + 3.3 V power supply and is used for filtering the input + 3.3 V power supply. The power supply circuit is high in integration level, small in number of used chips, small in occupied space, multiple in output power supply types, large in current, controllable in power-on sequence and good in compatibility.

Description

Technical Field

[0001] The utility model relates to the field of wireless electronic communications, in particular to a power supply circuit for a digital processing module with multiple power supplies and controllable power-on. Background Art

[0002] With the rapid development of digital communications, the performance and capacity of digital circuits in wireless electronic communication digital processing modules have been greatly improved. At the same time, higher and more precise requirements have been placed on their power supply circuits: first, the types of power supplies have increased; second, there are strict requirements on the power-on sequence of various power supplies; third, the power-on current of some power supplies is very large; and fourth, the power supply module is required to be highly integrated.

[0003] In order to adapt to this change, the present application proposes a power supply circuit for a digital processing module with multiple power supplies and power-on controllable circuit. This module uses a small number of integrated circuits, has large current, good performance, and is power-on controllable. In addition, the switching power supply and linear power supply are reasonably utilized, saving space, reducing interference, and improving the performance of the digital processing module. Summary of the Invention

[0004] In order to solve the problems existing in the background technology, the present invention proposes a power supply circuit for a digital processing module with multiple power supplies and controllable power-on.

[0005] A power supply circuit for a digital processing module with multiple power supplies and controllable power-on, comprising an integrated package of:

[0006] a first DC / DC converter configured to connect to a +5V power supply and convert and stabilize output voltages of +1V and +1.8V and a current of 13A;

[0007] a second DC / DC converter configured to connect to a +5V power supply and convert and stabilize output voltages of +1.8V, +1.2V, +1.6V, and +3.3V, and a current of 4A;

[0008] a power supply output sequence control circuit, configured to be connected to the first DC / DC converter and the second DC / DC converter, respectively, for controlling the output sequence of the six power supplies output by the first DC / DC converter and the second DC / DC converter;

[0009] A linear voltage regulator configured to connect to a +3.3V power supply and convert and regulate the output voltage to +1.8V analog voltage;

[0010] The first filtering circuit is configured to be connected to a +3.3V power supply and is used to filter the input +3.3V power supply.

[0011] Based on the above, the second filtering circuit is included, and the first DC / DC converter and the second DC / DC converter are respectively connected to the +5V power supply through the second filtering circuit.

[0012] Based on the above, the first DC / DC converter includes a DC / DC power supply chip N1, model HCE4620, the M2 pin of the DC / DC power supply chip N1 is connected to a +5V power supply, the A1 pin of the DC / DC power supply chip N1 outputs a +1V voltage through the grounding capacitor C4, the grounding capacitor C5 and the inductor L1 in sequence, and the A12 pin of the DC / DC power supply chip N1 outputs a +1.8V voltage through the grounding capacitor C8, the grounding capacitor C9 and the inductor L2 in sequence; the G8 pin of the DC / DC power supply chip N1 is connected to the H8 pin of the DC / DC power supply chip N1 through the resistor R7, the G9 pin of the DC / DC power supply chip N1 is connected to the H8 pin of the DC / DC power supply chip N1 through the resistor R6, and the H8 pin of the DC / DC power supply chip N1 is grounded through the capacitor C10.

[0013] Based on the above, the second DC / DC converter includes a DC / DC power supply chip N2, model HCE4644, the L5 pin of the DC / DC power supply chip N2 is connected to the +5V power supply, the F1 pin of the DC / DC power supply chip N2 outputs a +1.2V voltage through the inductor L11, the F1 pin of the DC / DC power supply chip N2 is also grounded through the capacitor C56 and the resistor R16, and is also grounded in turn through the capacitor C54 and the capacitor C55; the J1 pin of the DC / DC power supply chip N1 outputs a +1.6V voltage through the inductor L14, the J1 pin of the DC / DC power supply chip N2 is also connected through the capacitor C73 and the resistor R17 Grounded, and also grounded through capacitor C70 and capacitor C71 in sequence; the A1-A3 pins of the DC / DC power supply chip N2 output a +1.8V voltage through the inductor L10, and the A1-A3 pins of the DC / DC power supply chip N2 are also grounded through capacitor C53 and resistor R14, and also grounded through capacitor C57 and capacitor C58 in sequence; the C1, D1 and D2 pins of the DC / DC power supply chip N2 output a +3.3V voltage through the inductor L12 respectively, and the C1, D1 and D2 pins of the DC / DC power supply chip N2 are also grounded through capacitor C72 and resistor R15, and also grounded through capacitor C74 and capacitor C75 in sequence.

[0014] Based on the above, the power output sequence control circuit includes resistors R8, R10, R11, R12 and R13. One end of the resistor R8 is connected to the G9 pin of the DC / DC power chip N1, and the other end of the resistor R8 is connected to the F9 pin of the DC / DC power chip N1; one end of the resistor R10 is connected to the G8 pin of the DC / DC power chip N1, and the other end of the resistor R10 is connected to the C6 pin of the DC / DC power chip N2; one end of the resistor R11 is connected to the C3 pin of the DC / DC power chip N2, and the C3 pin of the DC / DC power chip N2 is connected to the B6 pin and C4 pin of the DC / DC power chip N2 through the resistor R18. The other end of resistor R11 is connected to pin C6 of the DC / DC power supply chip N2; one end of resistor R12 is connected to pin C2 of the DC / DC power supply chip N2, and pin C2 of the DC / DC power supply chip N2 is respectively connected to pin E6 and pin F4 of the DC / DC power supply chip N2 through resistor R19, and the other end of resistor R12 is connected to pin J6 of the DC / DC power supply chip N2; one end of resistor R13 is connected to pin F2 of the DC / DC power supply chip N2, and pin F2 of the DC / DC power supply chip N2 is respectively connected to pin H6 and pin J4 of the DC / DC power supply chip N2 through resistor R20, and the other end of resistor R13 is connected to pin K7 of the DC / DC power supply chip N2.

[0015] Based on the above, the linear voltage regulator includes a voltage regulator chip N3, model HCE74401. Pin 5 of the voltage regulator chip N3 is connected to the +3.3V power supply through the grounding capacitor C19. Pin 9 of the voltage regulator chip N3 outputs a 1.8V voltage through the resistor R22 and the inductor L5 in turn. The connection between the resistor R22 and the inductor L5 is grounded through the capacitor C22.

[0016] Based on the above, the first filtering circuit is an LC filtering circuit, one end of the inductor L8 is connected to the +3.3V input power supply, and the other end of the inductor L8 outputs two filtered +3.3V voltages through the inductor L6 and the inductor L7 respectively; the two ends of the inductor L8 are grounded through capacitors respectively.

[0017] Based on the above, the second filtering circuit includes capacitors C1, C2, C3, C64, C65, and C66. The M2 pin of the DC / DC power supply chip N1 is grounded through capacitors C1, C2, and C3 respectively; the L5 pin of the DC / DC power supply chip N2 is grounded through capacitors C64, C65, and C66 respectively.

[0018] The present invention has substantial features and advancements over the prior art. Specifically, the present invention replaces multiple power regulators with two DC / DC converter chips, resulting in improved integration, a reduced number of chips used, and reduced space. Furthermore, the present invention provides a wide variety of output power supplies with high current, up to 13A per channel. The output sequence of the DC / DC converter output power can be controlled as needed to meet the power supply needs of the rapidly developing digital processing chips. The present invention has excellent compatibility and can serve as a universal power supply platform, controlling the output voltage of the DC / DC converter simply by changing the resistance value of a resistor. Furthermore, the analog and digital power supplies are supplied separately, significantly reducing crosstalk. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present utility model.

[0020] Figure 2 This is a schematic diagram of the circuit structure of the first DC / DC converter of the present utility model.

[0021] Figure 3 This is a schematic diagram of the circuit structure of the second DC / DC converter of the present utility model.

[0022] Figure 4 The utility model is a circuit structure diagram of a power supply output sequence control circuit.

[0023] Figure 5 This is a schematic diagram of the circuit structure of the linear voltage stabilizer of the utility model.

[0024] Figure 6 It is a circuit structure diagram of the first filter circuit of the utility model. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1As shown, a power supply circuit for a digital processing module with multiple power supplies and power-on controllable circuit includes an integrated packaged second filtering circuit, a first DC / DC converter, a second DC / DC converter, a power output sequence control circuit, a linear voltage regulator, and a first filtering circuit. The first DC / DC converter is configured to connect to a +5V power supply and convert and stabilize output voltages of +1V and +1.8V and a current of 13A; the second DC / DC converter is configured to connect to a +5V power supply and convert and stabilize output voltages of +1.8V, +1.2V, +1.6V, and +3.3V and a current of 4A; the power output sequence control circuit is configured to connect to the first DC / DC converter and the second DC / DC converter, respectively, for controlling the output sequence of the six power supplies output by the first DC / DC converter and the second DC / DC converter; the linear voltage regulator is configured to connect to a +3.3V power supply and convert and stabilize the output of a +1.8V analog voltage; and the first filtering circuit is configured to connect to the +3.3V power supply and filter the input +3.3V power supply. The first DC / DC converter and the second DC / DC converter are respectively connected to a +5V power supply through a second filter circuit.

[0027] During operation, the input of the second filter circuit is connected to the +5V power supply provided by the device's main power board. After filtering, the power is fed to the first and second DC / DC converters, respectively. By configuring the power output sequence control circuit, the first and second DC / DC converters output power of various voltage levels in a set sequence after power is applied, thereby powering up the target, i.e., the digital processing module, according to the set power-up sequence. Since the power provided by the device's main power board is uncontrollable, a controllable 3.3V power supply is output through the second DC / DC converter to facilitate power-up sequence control. The input of the linear regulator is connected to the +3.3V power supply provided by the device's main power board. After filtering, converting, and stabilizing the input power, it outputs a +1.8V analog voltage. The voltage output by the first and second DC / DC converters is a digital power supply, isolating the analog and digital power supplies of the target, thus preventing crosstalk. The input of the first filter circuit is connected to the +3.3V power supply provided by the device's main power board, filtering the input +3.3V power before outputting it. The +3.3V output of the second DC / DC converter is a digital power supply, and the first filter circuit further outputs two 3.3V power supplies as analog power supplies, thereby physically isolating the digital and analog power supplies. The first filter circuit outputs two 3.3V power supplies, one for the analog chip and the other for the clock chip, to prevent mutual interference.

[0028] Specifically, such as Figure 2As shown, the first DC / DC converter includes a DC / DC power supply chip N1, model HCE4620. The M2 pin of the DC / DC power supply chip N1 is connected to a +5V power supply. The A1 pin of the DC / DC power supply chip N1 outputs a +1V voltage through grounding capacitor C4, grounding capacitor C5, and inductor L1. The A12 pin of the DC / DC power supply chip N1 outputs a +1.8V voltage through grounding capacitor C8, grounding capacitor C9, and inductor L2. The G8 pin of the DC / DC power supply chip N1 is connected to the H8 pin of the DC / DC power supply chip N1 through resistor R7. The G9 pin of the DC / DC power supply chip N1 is connected to the H8 pin of the DC / DC power supply chip N1 through resistor R6. The H8 pin of the DC / DC power supply chip N1 is grounded through capacitor C10. The DC / DC power supply chip N1 has two outputs, namely +1V and +1.8V. Figure 2 The INTVCC_1V and AUXVCC_1.8V in the circuit have a single output current of 13A.

[0029] like Figure 3 As shown, the second DC / DC converter includes a DC / DC power supply chip N2, model HCE4644, the L5 pin of the DC / DC power supply chip N2 is connected to the +5V power supply, the F1 pin of the DC / DC power supply chip N2 outputs a +1.2V voltage through the inductor L11, the F1 pin of the DC / DC power supply chip N2 is also grounded through the capacitor C56 and the resistor R16, and is also grounded through the capacitor C54 and the capacitor C55 in sequence; the J1 pin of the DC / DC power supply chip N1 outputs a +1.6V voltage through the inductor L14, the J1 pin of the DC / DC power supply chip N2 is also connected to the +1.6V voltage through the capacitor C73 and the resistor R17 The A1-A3 pins of the DC / DC power supply chip N2 output a +1.8V voltage through the inductor L10. The A1-A3 pins of the DC / DC power supply chip N2 are also grounded through the capacitor C53 and the resistor R14, and are also grounded through the capacitor C57 and the capacitor C58. The C1, D1 and D2 pins of the DC / DC power supply chip N2 output a +3.3V voltage through the inductor L12. The C1, D1 and D2 pins of the DC / DC power supply chip N2 are also grounded through the capacitor C72 and the resistor R15, and are also grounded through the capacitor C74 and the capacitor C75. The DC / DC power supply chip N2 has four outputs, namely +1.8V, +1.2V, +1.6V and +3.3V, that is Figure 3 The output current of IOVCC1.8V, VCC_1.2V, VCC_1.6V, IOVCC_3.3V and 3V3 is 4A per channel. Figure 3The PGOOD1_4 pin within the circuit is used as a monitoring point during debugging. The second filter circuit includes capacitors C1, C2, C3, C64, C65, and C66. The M2 pin of DC / DC power supply chip N1 is grounded through capacitors C1, C2, and C3, respectively. The L5 pin of DC / DC power supply chip N2 is grounded through capacitors C64, C65, and C66, respectively.

[0030] like Figure 4 As shown, the power output sequence control circuit includes resistors R8, R10, R11, R12, and R13. One end of the resistor R8 is connected to the G9 pin of the DC / DC power supply chip N1, and the other end of the resistor R8 is connected to the F9 pin of the DC / DC power supply chip N1; one end of the resistor R10 is connected to the G8 pin of the DC / DC power supply chip N1, and the other end of the resistor R10 is connected to the C6 pin of the DC / DC power supply chip N2; one end of the resistor R11 is connected to the C3 pin of the DC / DC power supply chip N2, and the C3 pin of the DC / DC power supply chip N2 is connected to the B6 pin and the C4 pin of the DC / DC power supply chip N2 through the resistor R18. The other end of resistor R11 is connected to pin C6 of DC / DC power chip N2. One end of resistor R12 is connected to pin C2 of DC / DC power chip N2. Pin C2 of DC / DC power chip N2 is connected to pins E6 and F4 of DC / DC power chip N2 via resistor R19. The other end of resistor R12 is connected to pin J6 of DC / DC power chip N2. One end of resistor R13 is connected to pin F2 of DC / DC power chip N2. Pin F2 of DC / DC power chip N2 is connected to pins H6 and J4 of DC / DC power chip N2 via resistor R20. The other end of resistor R13 is connected to pin K7 of DC / DC power chip N2. In this embodiment, the resistance values ​​of resistor R8 and the five resistors R10-R13 are all 0 ohms, and the circuit is a straight-through circuit. In reality, in different application platforms, the output voltage of the DC / DC converter is controlled by setting or changing the resistance value of each resistor in resistors R8, R10, R11, R12 and R13 according to actual needs. The size and order of the voltage output can be controlled by the resistance value, thereby controlling the power-on sequence. The power-on sequence is controlled by Figure 4 The circuit is controlled by Figure 4 The circuit controls the power-on sequence, the specific steps are as follows:

[0031] (1) After turning on the power supply, the input power supply +5VIN and +3.3VIN are immediately powered on, and then the output voltages INTVCC_1V, 3.3V_A and 3V3CLK are output;

[0032] (2) After INTVCC_1V is output normally, the signals PGOOD1_4620 and RUN2_4620 are valid. The validity of RUN2_4620 can control the output voltage AUXVCC_1.8V;

[0033] (3) After AUXVCC_1.8V is output normally, the signals PGOOD2_4620 and RUN1_1 are valid. The validity of RUN1_1 can control the voltage IOVCC1.8V output;

[0034] (4) After IOVCC1.8V is output normally, the signals PGOOD1_1 and RUN1_2 are valid. The valid RUN1_2 can control the voltage IOVCC_3.3V and 3V3 output. The 3V3 input linear regulator HCE74401 outputs a voltage of 1.8V_A.

[0035] (5) After IOVCC_3.3V is output normally, the signals PGOOD1_2 and RUN1_3 are valid. RUN1_3 is valid to control the output voltage VCC_1.2V;

[0036] (6) After VCC_1.2V is output normally, signals PGOOD1_3 and RUN1_4 are valid. RUN1_4 is valid to control the voltage VCC_1.6V output;

[0037] (7) All power supplies are working normally.

[0038] like Figure 5 As shown, the linear voltage regulator includes a voltage regulator chip N3, model HCE74401. Pin 5 of the voltage regulator chip N3 is connected to the +3.3V power supply through the grounding capacitor C19. Pin 9 of the voltage regulator chip N3 outputs a 1.8V voltage through the resistor R22 and the inductor L5 in turn. After the voltage regulator chip N3 converts and stabilizes the input power supply, it outputs a 1.8V analog power supply. The connection between the resistor R22 and the inductor L5 is grounded through the capacitor C22, thereby filtering the output.

[0039] like Figure 6 As shown, the first filter circuit is an LC filter circuit. One end of inductor L8 is connected to the +3.3V input power supply, and the other end of inductor L8 outputs two filtered +3.3V voltages through inductors L6 and L7. The two ends of inductor L8 are grounded through capacitors. The first filter circuit filters the input +3.3V power supply and outputs it.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A power supply circuit for a digital processing module with multiple power supplies and controllable power-on, characterized in that: Includes integrated packaging: a first DC / DC converter configured to connect to a +5V power supply and convert and stabilize output voltages of +1V and +1.8V and a current of 13A; a second DC / DC converter configured to connect to a +5V power supply and convert and stabilize output voltages of +1.8V, +1.2V, +1.6V, and +3.3V, and a current of 4A; a power supply output sequence control circuit, configured to be connected to the first DC / DC converter and the second DC / DC converter, respectively, for controlling the output sequence of the six power supplies output by the first DC / DC converter and the second DC / DC converter; A linear voltage regulator configured to connect to a +3.3V power supply and convert and regulate the output voltage to +1.8V analog voltage; The first filtering circuit is configured to be connected to a +3.3V power supply and is used to filter the input +3.3V power supply.

2. The digital processing module power supply circuit with multiple power supplies and controllable power-on according to claim 1, characterized in that: A second filtering circuit is included, and the first DC / DC converter and the second DC / DC converter are respectively connected to a +5V power supply through the second filtering circuit.

3. The digital processing module power supply circuit with multiple power supplies and controllable power-on according to claim 1, characterized in that: The first DC / DC converter includes a DC / DC power supply chip N1, model HCE4620. The M2 pin of the DC / DC power supply chip N1 is connected to a +5V power supply, the A1 pin of the DC / DC power supply chip N1 outputs a +1V voltage through a grounding capacitor C4, a grounding capacitor C5 and an inductor L1 in sequence, and the A12 pin of the DC / DC power supply chip N1 outputs a +1.8V voltage through a grounding capacitor C8, a grounding capacitor C9 and an inductor L2 in sequence; the G8 pin of the DC / DC power supply chip N1 is connected to the H8 pin of the DC / DC power supply chip N1 through a resistor R7, the G9 pin of the DC / DC power supply chip N1 is connected to the H8 pin of the DC / DC power supply chip N1 through a resistor R6, and the H8 pin of the DC / DC power supply chip N1 is grounded through a capacitor C10.

4. The digital processing module power supply circuit with multiple power supplies and controllable power-on according to claim 1, characterized in that: The second DC / DC converter includes a DC / DC power supply chip N2, model HCE4644. The L5 pin of the DC / DC power supply chip N2 is connected to a +5V power supply. The F1 pin of the DC / DC power supply chip N2 outputs a +1.2V voltage through an inductor L11. The F1 pin of the DC / DC power supply chip N2 is also grounded through a capacitor C56 and a resistor R16, and is also grounded in sequence through capacitors C54 and C55. The J1 pin of the DC / DC power supply chip N1 outputs a +1.6V voltage through an inductor L14. The J1 pin of the DC / DC power supply chip N2 is also grounded through a capacitor C73 and a resistor R17. They are also grounded through capacitors C70 and C71 in turn; the A1-A3 pins of the DC / DC power supply chip N2 output a +1.8V voltage through the inductor L10, and the A1-A3 pins of the DC / DC power supply chip N2 are also grounded through capacitors C53 and resistor R14, and are also grounded through capacitors C57 and C58 in turn; the C1, D1 and D2 pins of the DC / DC power supply chip N2 output a +3.3V voltage through the inductor L12 respectively, and the C1, D1 and D2 pins of the DC / DC power supply chip N2 are also grounded through capacitors C72 and resistor R15, and are also grounded through capacitors C74 and C75 in turn.

5. The digital processing module power supply circuit with multiple power supplies and controllable power-on according to claim 1, characterized in that: The power output sequence control circuit includes resistors R8, R10, R11, R12 and R13. One end of resistor R8 is connected to the G9 pin of the DC / DC power supply chip N1, and the other end of resistor R8 is connected to the F9 pin of the DC / DC power supply chip N1; one end of resistor R10 is connected to the G8 pin of the DC / DC power supply chip N1, and the other end of resistor R10 is connected to the C6 pin of the DC / DC power supply chip N2; one end of resistor R11 is connected to the C3 pin of the DC / DC power supply chip N2, and the C3 pin of the DC / DC power supply chip N2 is connected to the B6 pin and C4 pin of the DC / DC power supply chip N2 through resistor R18. Resistor R1 The other end of resistor R1 is connected to pin C6 of DC / DC power supply chip N2; one end of resistor R12 is connected to pin C2 of DC / DC power supply chip N2, and pin C2 of DC / DC power supply chip N2 is respectively connected to pin E6 and pin F4 of DC / DC power supply chip N2 through resistor R19, and the other end of resistor R12 is connected to pin J6 of DC / DC power supply chip N2; one end of resistor R13 is connected to pin F2 of DC / DC power supply chip N2, and pin F2 of DC / DC power supply chip N2 is respectively connected to pin H6 and pin J4 of DC / DC power supply chip N2 through resistor R20, and the other end of resistor R13 is connected to pin K7 of DC / DC power supply chip N2.

6. The digital processing module power supply circuit with multiple power supplies and controllable power-on according to claim 1, characterized in that: The linear voltage regulator includes a voltage regulator chip N3, model HCE74401. Pin 5 of the voltage regulator chip N3 is connected to the +3.3V power supply through the grounding capacitor C19. Pin 9 of the voltage regulator chip N3 outputs a 1.8V voltage through the resistor R22 and the inductor L5 in turn. The connection between the resistor R22 and the inductor L5 is grounded through the capacitor C22.

7. The digital processing module power supply circuit with multiple power supplies and controllable power-on according to claim 1, characterized in that: The first filter circuit is an LC filter circuit. One end of the inductor L8 is connected to the +3.3V input power supply, and the other end of the inductor L8 outputs two filtered +3.3V voltages through the inductor L6 and the inductor L7 respectively; both ends of the inductor L8 are grounded through capacitors.

8. The digital processing module power supply circuit with multiple power supplies and controllable power-on according to claim 2, characterized in that: The second filtering circuit includes capacitors C1, C2, C3, C64, C65, and C66. The M2 pin of the DC / DC power supply chip N1 is grounded through capacitors C1, C2, and C3 respectively; the L5 pin of the DC / DC power supply chip N2 is grounded through capacitors C64, C65, and C66 respectively.

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