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CN-224233392-U - Power supply equalization circuit for communication module

CN224233392UCN 224233392 UCN224233392 UCN 224233392UCN-224233392-U

Abstract

The utility model discloses a power supply equalization circuit for a communication module, which relates to the field of power supply of the communication module, and comprises a conversion module, a standby power supply group, a power supply module and a plurality of Faraday capacitors which are sequentially connected in series, wherein the power supply module and the conversion module are connected with an external power supply, the conversion module is used for converting the external power supply into a voltage with a preset amplitude and inputting the voltage into the communication module, the power supply module is used for outputting a stable constant-current power supply and charging each Faraday capacitor by the constant-current power supply during the input of the external power supply, and the Faraday capacitors are also used for sequentially providing the standby power supply for the communication module through the power supply module and the conversion module when the external power supply is disconnected.

Inventors

  • MA MINYUE

Assignees

  • 浙江伊维特网络科技有限公司

Dates

Publication Date
20260512
Application Date
20250530

Claims (10)

  1. 1. A power supply equalization circuit for a communication module, comprising: a conversion module; the standby power supply group comprises a power supply module and a plurality of Faraday capacitors which are sequentially connected in series; The power supply module and the conversion module are connected with an external power supply; the conversion module is used for converting an external power supply into a voltage with a preset amplitude value and inputting the voltage into the communication module; The power supply module is used for outputting a stable constant current power supply and charging all Faraday capacitors by the constant current power supply during the input period of an external power supply; The Faraday capacitor is also used for providing standby power for the communication module through the power module and the conversion module in sequence when the external power supply is disconnected.
  2. 2. The power supply equalization circuit for a communication module of claim 1, wherein said backup power supply unit further comprises an overcharge prevention module in one-to-one correspondence with the faraday capacitor, said overcharge prevention module configured to release an excessive charging current after the faraday capacitor is fully charged.
  3. 3. A power supply equalization circuit for a communication module as defined in claim 2, wherein said conversion module comprises in particular: the DC-DC conversion module is used for converting an external power supply into a direct current voltage with a preset amplitude and inputting the direct current voltage into the level conversion module; The level conversion module is used for converting direct-current voltage with preset amplitude and inputting the converted voltage into the communication module.
  4. 4. The power supply equalization circuit for a communication module as set forth in claim 3, wherein said anti-overcharge module comprises a second resistor R2, a fourth resistor R4, a first MOS transistor Q1, a sixth resistor R6 and a seventh resistor R7; One end of the second resistor R2 and one end of the fourth resistor R4 are simultaneously connected with the source electrode of the first MOS tube Q1 and the positive electrode of the Faraday capacitor corresponding to the overcharge prevention module, the other end of the second resistor R2 is simultaneously connected with the grid electrode of the first MOS tube Q1 and the second pin of the voltage reference component TL432, the other end of the fourth resistor R4 is simultaneously connected with the 1 st pin of the voltage reference component TL432 and one end of the tenth resistor R10, the sixth resistor R6 is connected with the seventh resistor R7 in parallel, one parallel end of the sixth resistor R6 is connected with the drain electrode of the first MOS tube Q1, and the other end of the tenth resistor R10 is sequentially connected with the third pin of the voltage reference component TL432 and the other parallel end of the sixth resistor R6 and the seventh resistor R7 and then connected with the negative electrode of the corresponding Faraday capacitor.
  5. 5. The power supply equalization circuit for a communication module of claim 4, wherein said power module comprises: the power chip, the first resistor R1 and the first diode D1; An Adjust pin of the power chip is sequentially connected with one end of a first resistor R1 and the positive electrode end of a first diode D1 and then connected with the positive electrode of a first series Faraday capacitor; The Vin pin of the power chip is connected with the negative end of the first diode D1 and an external power supply in sequence and then connected with the DC-DC conversion module, and the Vout pin of the power chip is connected with the other end of the first resistor R1.
  6. 6. The power supply equalization circuit for a communication module according to claim 5, wherein the DC-DC conversion module comprises a voltage stabilizing chip U3, a fifth pin of the voltage stabilizing chip U3 is connected with an external power supply and then connected with a Vin pin of a power supply chip in the power supply module, and a sixth pin of the voltage stabilizing chip U3 is connected with the level conversion module.
  7. 7. The power supply equalization circuit for a communication module of claim 6, wherein said level shift module comprises: The switching device comprises a switching chip U2, wherein a fourteenth pin of the switching chip U2 is connected with a sixth pin of a voltage stabilizing chip U3, and a first pin of the switching chip U2 inputs the converted voltage to a communication module.
  8. 8. The power supply equalization circuit for a communication module of claim 7, wherein the fourth resistor R4 in the anti-overcharge module is configured to define a reference voltage between an Adjust pin and a Vout pin of a power supply chip in the power supply module, and the power supply chip controls a current output by the first resistor R1 in the power supply module to be a constant current power supply based on the reference voltage.
  9. 9. The circuit of claim 8, wherein the anti-overcharge module comprises a voltage reference component TL432 and a first MOS transistor Q1 to form an anti-overcharge switch, wherein when a first pin of the voltage reference component TL432 reaches a threshold value, a second pin of the voltage reference component TL432 generates a fixed voltage, and when a source voltage of the first MOS transistor Q1, namely a voltage corresponding to a Faraday capacitor, is larger than the fixed voltage, a channel from a source to a drain of the first MOS transistor Q1 is conducted, and an excessive charging current is discharged through the channel to prevent overcharge.
  10. 10. The power supply equalization circuit for a communication module of claim 9, wherein the fixed voltage generated by the second pin of the voltage reference component TL432 is less than a threshold value corresponding to the first pin of the voltage reference component TL 432.

Description

Power supply equalization circuit for communication module Technical Field The present utility model relates to the field of power supply of communication modules, and in particular, to a power supply equalization circuit for a communication module. Background The existing 4G communication circuit board mainly has two challenges, namely ensuring that equipment can be safely powered off or at least still can keep certain communication time after power off when the equipment faces sudden power off conditions so as to upload important data to a server and prevent information loss, and secondly, because parameters of Farad capacitors (super capacitors) cannot be completely consistent, when the Farad capacitors are used in series, the problem of uneven voltage distribution easily occurs, which can lead certain capacitors to bear too high voltage, not only affecting the output performance of the capacitors, but also shortening the service life and even causing faults. Disclosure of utility model In order to realize that power can be continuously supplied to a 4G communication circuit board, namely a communication module under the condition of sudden power failure, the utility model provides a power supply equalization circuit for the communication module, which comprises the following components: a conversion module; the standby power supply group comprises a power supply module and a plurality of Faraday capacitors which are sequentially connected in series; The power supply module and the conversion module are connected with an external power supply; the conversion module is used for converting an external power supply into a voltage with a preset amplitude value and inputting the voltage into the communication module; The power supply module is used for outputting a stable constant current power supply and charging all Faraday capacitors by the constant current power supply during the input period of an external power supply; The Faraday capacitor is also used for providing standby power for the communication module through the power module and the conversion module in sequence when the external power supply is disconnected. Further, the standby power supply group further comprises overcharge prevention modules which are in one-to-one correspondence with the Faraday capacitors, and the overcharge prevention modules are used for releasing redundant charging current after the Faraday capacitors are fully charged. Further, the conversion module specifically includes: the DC-DC conversion module is used for converting an external power supply into a direct current voltage with a preset amplitude and inputting the direct current voltage into the level conversion module; The level conversion module is used for converting direct-current voltage with preset amplitude and inputting the converted voltage into the communication module. Further, the overcharge prevention module comprises a second resistor R2, a fourth resistor R4, a first MOS tube Q1, a sixth resistor R6 and a seventh resistor R7; One end of the second resistor R2 and one end of the fourth resistor R4 are simultaneously connected with the source electrode of the first MOS tube Q1 and the positive electrode of the Faraday capacitor corresponding to the overcharge prevention module, the other end of the second resistor R2 is simultaneously connected with the grid electrode of the first MOS tube Q1 and the second pin of the voltage reference component TL432, the other end of the fourth resistor R4 is simultaneously connected with the 1 st pin of the voltage reference component TL432 and one end of the tenth resistor R10, the sixth resistor R6 is connected with the seventh resistor R7 in parallel, one parallel end of the sixth resistor R6 is connected with the drain electrode of the first MOS tube Q1, and the other end of the tenth resistor R10 is sequentially connected with the third pin of the voltage reference component TL432 and the other parallel end of the sixth resistor R6 and the seventh resistor R7 and then connected with the negative electrode of the corresponding Faraday capacitor. Further, the power module includes: the power chip, the first resistor R1 and the first diode D1; An Adjust pin of the power chip is sequentially connected with one end of a first resistor R1 and the positive electrode end of a first diode D1 and then connected with the positive electrode of a first series Faraday capacitor; The Vin pin of the power chip is connected with the negative end of the first diode D1 and an external power supply in sequence and then connected with the DC-DC conversion module, and the Vout pin of the power chip is connected with the other end of the first resistor R1. Further, the DC-DC conversion module comprises a voltage stabilizing chip U3, wherein a fifth pin of the voltage stabilizing chip U3 is connected with an external power supply and then connected with a Vin pin of a power supply chip in the power supply module, and a sixth pin of th