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CN-122001215-A - Power management circuit and implantable medical device

CN122001215ACN 122001215 ACN122001215 ACN 122001215ACN-122001215-A

Abstract

The application discloses a power management circuit and an implantable medical device, belonging to the technical field of implantable medical devices, comprising a boosting chip, a first power supply and a second power supply, wherein a first pin of the boosting chip is connected with an input voltage, a second pin of the boosting chip is connected with an output voltage, and an enabling pin of the boosting chip is configured to keep the boosting chip in a normally-open enabling state; the device comprises a chip, a diode, an inductor, a first resistor, a second resistor and a second resistor, wherein the anode of the diode is connected with a first pin of the chip, the cathode of the diode is connected with a third pin of the chip, the first end of the inductor is connected with the first pin of the chip, the second end of the inductor is connected with the third pin of the chip, the first end of the first resistor is connected with a fourth pin of the chip, the second end of the first resistor is connected with the first pin of the chip, and the second end of the second resistor is grounded. The power management circuit is applied to implantable medical devices. The application prolongs the service life of the implanted medical equipment and has high reliability and high safety.

Inventors

  • Cao Xinggen

Assignees

  • 苏州无双医疗设备有限公司

Dates

Publication Date
20260508
Application Date
20260331

Claims (10)

  1. 1. A power management circuit, characterized by comprising, The power management circuit comprises a power management circuit, a boosting chip, an enabling pin, a power supply control circuit and a power supply control circuit, wherein a first pin of the boosting chip is connected with input voltage and used as an input end of the power management circuit, and a second pin of the boosting chip is connected with output voltage and used as an output end of the power management circuit; the anode of the diode is connected with the first pin of the boost chip, and the cathode of the diode is connected with the third pin of the boost chip; And the first end of the inductor is connected with the first pin of the boosting chip, and the second end of the inductor is connected with the third pin of the boosting chip.
  2. 2. The power management circuit of claim 1 wherein the boost chip is further configured to stop switching of the internal switching tube of the boost chip when the forward conduction voltage drop of the input voltage minus the diode is greater than or equal to the output voltage set point, and to start internal switching tube modulation to boost when the forward conduction voltage drop of the input voltage minus the diode is less than the output voltage set point.
  3. 3. The power management circuit of claim 1, further comprising a first resistor, wherein a first end of the first resistor is connected to a fourth pin of the boost chip, and a second end of the first resistor is connected to the first pin of the boost chip; And the first end of the second resistor is connected with the fifth pin of the boost chip, and the second end of the second resistor is grounded.
  4. 4. The power management circuit of claim 2, further comprising: A first end of the first capacitor is connected with a second end of the first resistor, and a second end of the first capacitor is grounded; and the first end of the second capacitor is connected with the second pin of the boost chip, and the second end of the second capacitor is grounded.
  5. 5. The power management circuit of claim 4 further comprising a fuse element, a first end of the fuse element being connected to a first end of the first capacitor and a second end of the fuse element being connected.
  6. 6. The power management circuit of claim 3 wherein a first pin of the boost chip is a power input pin IN, a third pin of the boost chip is a switch node pin LX, a second pin of the boost chip is a power output pin OUT, a fourth pin of the boost chip is an enable pin EN, and a fifth pin of the boost chip is an output voltage select pin SEL for setting an output voltage set point.
  7. 7. The power management circuit of claim 3 wherein the boost chip internal switching transistor is a metal oxide semiconductor field effect transistor.
  8. 8. The power management circuit of claim 4 wherein the first capacitor and the second capacitor are filter capacitors.
  9. 9. The power management circuit of claim 5 wherein the fuse element is a fuse.
  10. 10. An implantable medical device, comprising: a power management circuit according to any one of claims 1 to 9 for providing an output voltage; the first output end of the battery is connected with the input end of the power management circuit and is used for providing input voltage; the input end of the high-voltage charging and electric shock transmission module is connected with the second output end of the battery and is used for providing high-energy electric shock transmission function for the implanted medical equipment; The input end of the low-voltage processing module is connected with the output end of the power management circuit, and the output end of the low-voltage processing module and the output end of the high-voltage charging and electric shock conveying module are used as the output end of the implantable medical device and used for receiving output voltage and executing control operation or alarm operation of the implantable medical device.

Description

Power management circuit and implantable medical device Technical Field The present application relates to the field of implantable medical devices, and more particularly, to a power management circuit and an implantable medical device. Background Implantable medical devices typically employ a primary non-rechargeable battery as a power source, common types including lithium-iodine batteries, lithium-manganese dioxide batteries, lithium-fluorocarbon batteries, and the like. The primary battery has specific voltage change characteristics, the open-circuit voltage (Open Circuit Voltage) of the battery is higher at the beginning of the service life and can reach more than 3.2V generally, and the voltage of the battery can be gradually reduced to the cut-off voltage (usually lower than 2.3V) along with the increase of the service life. The battery voltage can be maintained for a long time in a section of about 2.8V, and during the period that the battery voltage is maintained at 2.8V, the internal devices of the implanted medical equipment are in a dormant state for a large part of time so as to reduce energy consumption, and core devices such as a monitoring chip and a sensor of the system still need to continuously operate, so that support is provided for the core functions such as physiological signal acquisition and state monitoring of the equipment, and long-time stable power supply is required to be maintained through a power chip in the operation process. Because implanted medical equipment relies on the primary battery power supply and can not change at any time, any extra quiescent current loss can directly shorten the life of equipment, and then lead to the patient to need to carry out operation replacement equipment in advance, increase patient's misery and medical burden. At present, the traditional power supply scheme adopted by the implantable medical device has obvious defects, and the core requirements of low power consumption and long service life of the device are difficult to meet. If a linear voltage regulator (LDO) is adopted, when the battery voltage is far higher than the system working voltage, the energy conversion efficiency is extremely low, redundant electric energy can be directly converted into heat, so that not only is energy waste caused, but also the stability of equipment can be affected due to heat, if a common Boost (Boost) circuit is adopted, the problem of overhigh static power consumption exists, when the battery voltage is higher than the set output voltage, the conduction voltage drop of a body diode of a switch tube inside a chip is larger, or the chip still can perform unnecessary switching action, so that the energy loss is about 10%. For implantable medical devices such as ICDs, the accumulated energy loss of about 10% can shorten the service life of the device by years under the use scale of implantable medical products, seriously affect the actual use time of the device, and cannot meet the requirement of long-term reliable operation of the implantable medical device. Disclosure of Invention The application aims to provide a power management circuit and an implantable medical device, which meet the requirement of long-term reliable operation of the implantable medical device. In order to achieve the above purpose, the technical scheme of the application is as follows: a power management circuit includes, a power supply circuit, The power management circuit comprises a power management circuit, a boosting chip, an enabling pin, a power supply control circuit and a power supply control circuit, wherein a first pin of the boosting chip is connected with input voltage and used as an input end of the power management circuit, and a second pin of the boosting chip is connected with output voltage and used as an output end of the power management circuit; the anode of the diode is connected with the first pin of the boost chip, and the cathode of the diode is connected with the third pin of the boost chip; And the first end of the inductor is connected with the first pin of the boosting chip, and the second end of the inductor is connected with the third pin of the boosting chip. Optionally, the boost chip is further configured to stop the switching action of the internal switching tube of the boost chip when the forward conduction voltage drop of the input voltage minus the diode is greater than or equal to the output voltage set value, and start the internal switching tube modulation to boost when the forward conduction voltage drop of the input voltage minus the diode is less than the output voltage set value. Optionally, the power management circuit further includes: The first end of the first resistor is connected with the fourth pin of the boost chip, and the second end of the first resistor is connected with the first pin of the boost chip; And the first end of the second resistor is connected with the fifth pin of the boost chip, and the second end of the second r