CN-224205088-U - NFC energy capturing and energy storage communication management circuit

Abstract

The utility model relates to an NFC energy capturing and energy storage communication management circuit, which aims at solving the technical problems that quick interaction between an NFC intelligent terminal and NFC passive equipment of the existing similar product is inconvenient and the interaction can be successful only after a long time interval is needed. The NFC communication circuit is characterized in that radio frequency field energy of the NFC communication circuit is externally supplied to Vout and is connected with a low-power-consumption MCU of an MCU control circuit, an NFC double-interface tag and a channel chip of the NFC communication circuit are in bidirectional connection with the low-power-consumption MCU of the MCU control circuit, the low-power-consumption MCU of the MCU control circuit is respectively connected with a quick charge switch and a charge voltage detection of an NFC energy capture circuit, a voltage stabilizing circuit of the NFC energy capture circuit is connected with a driving circuit of the MCU control circuit, and a rectifying circuit of the NFC energy capture circuit is connected with a matching circuit of the NFC communication circuit, so that communication and energy capture functions are realized through an NFC antenna.

Inventors

• WANG JUNWEI
• ZHENG QINFENG
• CHEN LI
• HUANG XIANGWAN
• LU ZHAN
• HUANG XIANQUAN

Assignees

• 宁波生久科技有限公司

Dates

Publication Date

20260505

Application Date

20250711

Claims (6)

1. 1. The NFC energy capturing and energy storage communication management circuit comprises an NFC intelligent terminal and NFC passive equipment, wherein the NFC passive equipment comprises an NFC communication circuit, an NFC energy capturing circuit, an MCU control circuit and an NFC antenna, the NFC communication circuit comprises a matching circuit, an NFC double-interface tag, a channel chip and an NFC energy capturing circuit, the NFC energy capturing circuit comprises a rectifying circuit, a voltage limiting protection circuit, a quick charging switch, a medium-speed charging current limiting resistor, an energy storage electrolytic capacitor and a charging voltage detection and voltage stabilizing circuit, the MCU control circuit comprises a low-power consumption MCU, a driving circuit, a functional module and a state detection circuit, and is characterized in that the NFC double-interface tag and the channel chip of the NFC communication circuit are connected with the MCU in a bidirectional mode, the low-power consumption MCU of the NFC communication circuit is respectively connected with a quick charging switch and a charging voltage detection of the NFC energy capturing circuit, the voltage stabilizing circuit of the NFC energy capturing circuit is connected with the driving circuit of the MCU control circuit, the rectifying circuit of the NFC energy capturing circuit is connected with the matching circuit of the NFC communication circuit, and the rectifying circuit, the voltage limiting protection circuit, the energy storage capacitor and the NFC energy capturing circuit and the NFC energy storage capacitor are connected with the NFC energy limiting protection circuit and the NFC energy storage capacitor respectively.
2. 2. The NFC energy capturing and energy storage communication management circuit according to claim 1 is characterized in that radio frequency field energy is externally supplied to Vout and is arranged on an NFC double-interface tag and a channel chip, the NFC double-interface tag and the channel chip of the NFC communication circuit are connected with a matching circuit, a low-power MCU of an MCU control circuit is respectively connected with a state detection circuit and a driving circuit, the driving circuit is connected with a functional module, a quick charge switch, a medium-speed charge current limiting resistor, a charge voltage detection circuit and a voltage stabilizing circuit of the NFC energy capturing circuit are connected with an energy storage electrolytic capacitor, the quick charge switch, the medium-speed charge current limiting resistor are connected with a rectifying circuit, and the rectifying circuit is connected with a voltage limiting protection circuit.
3. 3. The NFC energy capturing and energy storage communication management circuit according to claim 2, wherein the matching circuit of the NFC communication circuit is a single-antenna matching circuit, the single-antenna matching circuit comprises matching capacitors C1, C3, C4, C5 and C6, connecting wires RF1 and RF2 of the single-antenna matching circuit are connected with a rectifying circuit of the NFC energy capturing circuit, and connecting wires LA and LB of the single-antenna matching circuit are connected with NFC double-interface tags and channel chips of the NFC communication circuit.
4. 4. The NFC energy capturing and energy storage communication management circuit according to claim 2, wherein the NFC dual interface tag and channel chip of the NFC communication circuit comprises an NFC dual interface tag and channel chip U4, a capacitor C19 and an I2C interface connected with an external power supply Vout of radio frequency field energy, and the I2C interface comprises an I2C_IRQ pin, an I2C_SDA pin, an I2C_SCL pin, a CSN pin, a GND pin, a VCC pin, a V out pin, an LA pin and an LB pin.
5. 5. The NFC energy capturing and energy storage communication management circuit according to claim 2, wherein the rectifying circuit of the NFC energy capturing circuit is composed of D1, D2, D3 and D4, the voltage limiting protection circuit is composed of D5 and C8, D5 is a voltage stabilizing tube with the voltage of about 16V, the quick charging switch is composed of Q1, Q2, R3 and R4, the medium-speed charging current limiting resistor is composed of R1 and R2, R2 is a resistor with the voltage of about 1K, R1 is a resistor with the voltage of about 120 ohms, and the energy storage electrolytic capacitor is an electrolytic capacitor with the voltage of about 1000 uF/25V.
6. 6. The NFC energy capture and storage communication management circuit of claim 2, wherein said NFC energy capture circuit charge voltage detection includes R5 and R6 divider resistors.

Description

NFC energy capturing and energy storage communication management circuit Technical Field The utility model relates to the field of wireless communication and wireless power supply, in particular to an NFC energy capturing and energy storage communication management circuit. Background At present, NFC (near field communication) is a radio technology with short distance and high frequency, the operating frequency is 13.56MHz, and the NFC technology generally comprises a master device and a slave device, wherein the master device is self-powered to generate a radio frequency field and initiate communication, the slave device is self-powered to acquire energy from the radio frequency field generated by the master device and convert the energy into electric energy, and low-power-consumption operation and communication recovery of the NFC technology are met. The mobile phone with the NFC function plays an increasingly important role in daily life, and is applied everywhere from payment, simulating an access card to charging an NFC bracelet, starting an NFC passive electronic lock and the like, the application requires a radio frequency field to have higher energy, and the capability of capturing energy of passive equipment is higher. The NFC chip manufacturers (such as Shanghai compound denier microelectronic group Co., ltd.) of the products and the like develop products for such applications, such as NFC dual-interface and channel chip FM11NT082 to realize non-contact communication with mobile phone APP, EEPROM of the NFC chip can be read and written after authentication, and simultaneously contact interaction can be carried out with equipment (such as an electronic lock) MCU through I2C to realize communication between the mobile phone APP and the equipment MCU, and realize functions (such as switch lock) of power supply, driving and the like. In order to realize the functions, the NFC chip FM11NT082 needs to be subjected to channel mode switching, and in the application development process, when the NFC mobile phone and the NFC passive equipment interact, the interaction needs to be performed at intervals. Disclosure of Invention In order to overcome the defects, the utility model aims to provide an NFC energy capturing and energy storage communication management circuit for solving the technical problems that the quick interaction connection between an NFC intelligent terminal (NFC mobile phone or special NFC main device) and an NFC passive device of the existing similar product is inconvenient and the interaction can be successfully performed only after the interval time is needed. The aim is achieved by the following technical scheme. The NFC energy capturing and energy storage communication management circuit comprises an NFC intelligent terminal and NFC passive equipment, wherein the NFC passive equipment comprises an NFC communication circuit, an NFC energy capturing circuit, an MCU control circuit and an NFC antenna, the NFC communication circuit comprises a matching circuit, an NFC double-interface tag, a channel chip and an NFC energy capturing circuit, the NFC energy capturing circuit comprises a rectifying circuit, a voltage limiting protection circuit, a quick charging switch, a medium-speed charging current limiting resistor, an energy storage electrolytic capacitor and a charging voltage detection and voltage stabilizing circuit, the MCU control circuit comprises a low-power consumption MCU, a driving circuit, a functional module and a state detection circuit, the NFC energy capturing circuit is structurally characterized in that the NFC double-interface tag and the channel chip of the NFC communication circuit are connected with the low-power consumption MCU of the MCU control circuit in a bidirectional mode, the low-power consumption MCU of the MCU control circuit is respectively connected with a quick charging switch and a charging voltage detection of the NFC energy capturing circuit, the voltage stabilizing circuit of the NFC energy capturing circuit is connected with a driving circuit of the MCU control circuit, the rectifying circuit of the NFC energy capturing circuit is connected with the matching circuit of the NFC communication circuit, the rectifying circuit, the voltage limiting circuit, the energy storage electrolytic circuit and the NFC energy capturing circuit are connected with the NFC energy limiting protection circuit, and the NFC energy storage capacitor is connected with the NFC energy capturing circuit respectively. The NFC dual-interface tag and the channel chip of the NFC communication circuit are connected with a matching circuit, a low-power MCU of the MCU control circuit is respectively connected with a state detection and driving circuit, the driving circuit is connected with a functional module, a quick charge switch, a medium-speed charge current-limiting resistor, a charge voltage detection and voltage stabilizing circuit of the NFC energy capture circuit are connec