CN-116709608-B - Boost circuit, boost method, PCB (printed circuit board), chip and electronic cigarette

CN116709608BCN 116709608 BCN116709608 BCN 116709608BCN-116709608-B

Abstract

The application relates to the technical field of LED driving, in particular to a booster circuit, a booster method, a PCB (printed circuit board), a chip and an electronic cigarette, wherein the booster circuit comprises N port parts and N/2 capacitors, N is equal to or larger than 4, N is a double number, N port parts are paired in pairs, one capacitor is connected between the port parts which are matched, a light-emitting diode is connected between the port parts which are not in a pairing relation, the port parts are used for realizing the charging of the capacitor connected with the port parts and the output booster, the working state of the port parts can be adjusted according to the port information of the light-emitting diode to be lighted, the voltage at two ends of the capacitor can be adjusted, the voltage difference of two power supply voltages at the two ends of the light-emitting diode can be realized, namely the lighting of the light-emitting diode can be realized under the condition that the voltage is lower by increasing the capacitor, and the whole circuit has the advantage of low cost.

Inventors

ZHAO QIDONG
WANG WEILI
LIANG BIN
FENG QIAOFANG
GAO KEWEI
YU AIDI

Assignees

杭州拓尔微电子有限公司

Dates

Publication Date: 20260508
Application Date: 20230505

Claims (9)

1. The booster circuit is characterized by comprising N port parts and N/2 capacitors, wherein N is equal to or greater than 4 and N is a double number, the N port parts are paired in pairs, one capacitor is connected between the port parts in the matched pair, and a light emitting diode is connected between the port parts without pairing relation; The port part comprises a control part, a PMOS tube and an NMOS tube, wherein the control part is respectively connected with grid electrodes of the PMOS tube and the NMOS tube, a source electrode of the PMOS tube is connected with a power supply, a source electrode of the NMOS tube is grounded, a drain electrode of the PMOS tube and a drain electrode of the NMOS tube are used for being connected with a capacitor and a light emitting diode, and the drain electrode of the PMOS tube and the drain electrode of the NMOS tube of the port part are both used for being connected with a positive electrode of a certain light emitting diode or a negative electrode of a certain light emitting diode.
2. The boost circuit of claim 1 wherein the drain of the PMOS and NMOS transistors at either port are connected to one end of the corresponding capacitor and the drain of the PMOS and NMOS transistors at the other port are connected to the other end of the corresponding capacitor.
3. The booster circuit of claim 1 wherein N of said port sections are used to effect drive control of m leds, wherein (N-1) (N-2)≥m。
4. A boosting method for realizing operation control of the booster circuit according to any one of claims 1 to 3, comprising the steps of: S100, acquiring port information of a light emitting diode to be lightened, wherein the port information comprises a first port part, a second port part and a third port part, the first port part is a port part connected with a positive electrode of the light emitting diode, the second port part is a port part matched with the first port part, and the third port part is a port part connected with a negative electrode of the light emitting diode; S200, adjusting working states of the first port part and the second port part, and enabling a capacitor connected between the first port part and the second port part to be charged; s300, adjusting working states of the first port part and the second port part to boost the positive electrode of the light emitting diode; S400, adjusting the working state of the third port part to enable the negative electrode of the light emitting diode to be grounded, and lighting the light emitting diode.
5. The method according to claim 4, wherein the first port section, the second port section and the third port section have the same structure, the first port section includes a control member, a PMOS transistor and an NMOS transistor, the control member is connected to the gates of the PMOS transistor and the NMOS transistor, the source of the PMOS transistor is connected to a power source, the source of the NMOS transistor is grounded, the drain of the PMOS transistor and the drain of the NMOS transistor are connected to a capacitor and a light emitting diode, and the drain of the PMOS transistor and the drain of the NMOS transistor of any port section are connected to one end of the corresponding capacitor, the drain of the PMOS transistor and the drain of the NMOS transistor of the other port section are connected to the other end of the corresponding capacitor, and the steps S200, S300 and S400 are specifically: s201, a control piece of a first port part controls a PMOS tube 1_P of the first port part to be opened, a control piece of a second port part controls an NMOS tube 2_N of the second port part to be opened, and a capacitor connected between the first port part and the second port part is charged; S301, controlling the PMOS tube 1_P of the first port to be closed by the control piece of the first port, and controlling the PMOS tube 2_P of the second port to be opened by the control piece of the second port, so that the anode of the light emitting diode is boosted; s401, controlling the NMOS tube 3_N of the third port to be turned on by the control piece of the third port, grounding the cathode of the light emitting diode, and lighting the light emitting diode.
6. The method of boosting according to claim 4, further comprising the step of: S500, polling is carried out at high frequency, and the polling frequency exceeds the visible frequency of human eyes.
7. A PCB board on which a booster circuit as claimed in any one of claims 1 to 3 is printed.
8. A chip comprising the boost circuit of any one of claims 1-3.
9. An electronic cigarette comprising a housing, wherein the PCB of claim 7 is disposed within the housing.

Description

Boost circuit, boost method, PCB (printed circuit board), chip and electronic cigarette Technical Field The invention relates to the technical field of LED driving, in particular to a booster circuit, a booster method, a PCB (printed circuit board), a chip and an electronic cigarette. Background In products using lithium batteries, such as electronic cigarettes, an LED is generally required to be used for indicating and reminding or realizing a display function, and for relatively complex LED arrays, nixie tubes and even LCD/OLED array screens, because complex starting logic is required, an MCU (micro control unit) or a singlechip is generally used for alignment to realize output control, but different color lamp bead lighting voltages exist, such as green lamp beads can be lighted at about 2.5V, but white lamp beads need 3.3V or more, so that in order to ensure that screen contents can be normally displayed in a battery working voltage range, boosting operation is required for output. In the prior art, a boosting mode of an integral control circuit is generally adopted, such as a BOOST circuit or a charge pump circuit is adopted for boosting, but standby and working currents are increased, namely the working energy consumption of a product is increased, and in order to improve the safety degree in the working process of the circuit, an isolation circuit is additionally arranged between a power supply and an MCU, so that the circuit cost is increased, namely the production cost of the product is increased. It can be seen that there is a need for improvements and improvements in the art. Disclosure of Invention In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a booster circuit that can realize the lighting of a light emitting diode even when the power supply voltage is low, and has the advantage of low circuit cost. In order to achieve the above purpose, the invention adopts the following technical scheme: a boosting circuit comprises N port parts and N/2 capacitors, wherein N is equal to or greater than 4 and N is a double number, the N port parts are paired in pairs, one capacitor is connected between the port parts in the matched pair, a light emitting diode is connected between the port parts without the matched relation, and the port parts are used for realizing the charging of the capacitors connected with the light emitting diode and the boosting of output. In the boost circuit, the port part comprises a control part, a PMOS tube and an NMOS tube, wherein the control part is respectively connected with the grid electrodes of the PMOS tube and the NMOS tube, the source electrode of the PMOS tube is connected with a power supply, the source electrode of the NMOS tube is grounded, and the drain electrodes of the PMOS tube and the NMOS tube are used for being connected with a capacitor and a light-emitting diode. In the voltage boosting circuit, the drain electrode of the PMOS tube and the drain electrode of the NMOS tube at any port are connected with one end of the corresponding capacitor, and the drain electrode of the PMOS tube and the drain electrode of the NMOS tube at the other port are connected with the other end of the corresponding capacitor. In the booster circuit, N port parts are used for realizing driving control of m light emitting diodes, wherein (N-1) (N-2) & gtm is not less than. The application also correspondingly provides a boosting method for realizing the working control of the boosting circuit, which comprises the following steps: S100, acquiring port information of a light emitting diode to be lightened, wherein the port information comprises a first port part, a second port part and a third port part, the first port part is a port part connected with a positive electrode of the light emitting diode, the second port part is a port part matched with the first port part, and the third port part is a port part connected with a negative electrode of the light emitting diode; S200, adjusting working states of the first port part and the second port part, and enabling a capacitor connected between the first port part and the second port part to be charged; s300, adjusting working states of the first port part and the second port part to boost the positive electrode of the light emitting diode; S400, adjusting the working state of the third port part to enable the negative electrode of the light emitting diode to be grounded, and lighting the light emitting diode. In the boosting method, the structures of the first port part, the second port part and the third port part are consistent, the first port part comprises a control part, a PMOS tube and an NMOS tube, the control part is respectively connected with the grid electrodes of the PMOS tube and the NMOS tube, the source electrode of the PMOS tube is connected with a power supply, the source electrode of the NMOS tube is grounded, the drain electrode of the PMOS tube and th