CN113595198A - IDAC voltage regulating circuit based on wireless quick charging application - Google Patents
IDAC voltage regulating circuit based on wireless quick charging application Download PDFInfo
- Publication number
- CN113595198A CN113595198A CN202110907007.1A CN202110907007A CN113595198A CN 113595198 A CN113595198 A CN 113595198A CN 202110907007 A CN202110907007 A CN 202110907007A CN 113595198 A CN113595198 A CN 113595198A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- resistor
- idac
- voltage
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
Abstract
The invention discloses an IDAC voltage regulating circuit based on wireless quick charging application, which relates to the technical field of voltage regulating circuits and comprises an MCU processor, an IDAC functional module, a DC/DC converter and a peripheral circuit thereof, wherein the MCU processor is connected with the DC/DC converter and the peripheral circuit thereof through the IDAC functional module; the DC/DC converter and peripheral circuits thereof comprise a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first inductor L1, a voltage VLN end, a voltage VDCDC end and a chip FR 9885; the invention realizes digital control of output voltage, realizes the constant voltage and constant current function of the same numerical control power supply, and has higher output precision.
Description
Technical Field
The invention relates to a voltage regulating circuit technology, in particular to an IDAC voltage regulating circuit based on wireless quick charging application. Belongs to the technical field of electronics.
Background
In recent years, with the rapid development of mobile devices such as mobile phones and smart phones, the development of wireless charging technology has gradually reached commercialization from a theoretical research level. In recent years, people have stronger dependence on mobile phones, and the mobile phones are in urgent need of quick charging while continuously consuming power, so that research and commercial application of wireless quick charging technology are promoted.
In a conventional wireless transmission system, the transmission power is usually adjusted by means of a frequency conversion or fixed frequency modulation duty ratio, which may cause interference to the charging device due to a constantly changing frequency or duty ratio, so that the charging efficiency of the charging device is poor and the charging process is unstable. The scheme can minimize the interference of wireless charging on the mobile phone, but the requirement for realizing accurate adjustment of the multi-gear load voltage requires a core processor, so that the application cost and the power consumption are increased, and the electromagnetic compatibility of the product is also influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing an IDAC voltage regulating circuit based on wireless rapid charging application aiming at the defects of the background art, which can realize digital control of output voltage, can realize that the same numerical control power supply has the functions of constant voltage and constant current and has higher output precision.
The invention adopts the following technical scheme for solving the technical problems:
an IDAC voltage regulating circuit based on wireless quick charging application comprises an MCU processor, an IDAC functional module, a DC/DC converter and a peripheral circuit thereof, wherein the MCU processor is connected with the DC/DC converter and the peripheral circuit thereof through the IDAC functional module;
the DC/DC converter and peripheral circuits thereof comprise a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first inductor L1 and a voltage VLNTerminal, voltage VDCDCTerminal, chip FR 9885;
wherein, the voltage VLNThe ends of the first capacitor C1 are respectively connected with one end of the first capacitor C1, one end of the second capacitor C2, one end of the third capacitor C3, one end of the first resistor R1 and the VIN interface of the chip FR9885, and the other end of the first capacitor C1 is respectively connected with the other end of the second capacitor C2, the other end of the third capacitor C3 and the chip FR9885The GND terminal of the transformer is grounded; the other end of the first resistor R1 is connected to the SHDN interface of the chip FR9885, the BST interface of the chip FR9885 is connected to one end of the ninth capacitor C9, the other end of the ninth capacitor C9 is connected to the LX interface of the chip FR9885 and one end of the first inductor L1, the other end of the first inductor L1 is connected to one end of the second resistor R2, one end of the fifth capacitor C5, one end of the sixth capacitor C6, one end of the seventh capacitor C7, one end of the eighth capacitor C8, and the voltage VDCDCAnd the other end of the second resistor R2 is connected with the other end of the fifth capacitor C5, one end of the third resistor R3, one end of the fourth resistor R4 and the FB interface of the chip FR9885 respectively, the other end of the third resistor R3 is grounded, the other end of the sixth capacitor C6, the other end of the seventh capacitor C7 and the other end of the eighth capacitor C8 are connected with the ground respectively, and the other end of the fourth resistor R4 is connected with the IDAC functional module.
As a further preferable solution of the IDAC voltage regulating circuit based on the wireless fast charging application of the present invention, the MCU processor is configured to control the magnitude and direction of the output current of the IDAC function module.
As a further preferable scheme of the IDAC voltage regulating circuit based on the wireless fast charging application of the present invention, the IDAC function module is a 6-bit current steering DAC, and is composed of two sets of current sources and two sets of switches.
As a further preferable solution of the IDAC voltage regulating circuit based on wireless fast charging application of the present invention, the voltage V isDCDCThe target regulation range of the end is 4V to 11V.
As a further preferable aspect of the IDAC voltage regulating circuit based on the wireless fast charging application of the present invention, the resistance value of the second resistor R2 is 220 kilo-ohms.
As a further preferable aspect of the IDAC voltage regulator circuit based on the wireless fast charging application of the present invention, the third resistor R3 is 12 kilo-ohms.
As a further preferable aspect of the IDAC voltage regulating circuit based on the wireless fast charging application of the present invention, the resistance value of the fourth resistor is 100 kilo-ohms.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can realize digital control of output voltage, can realize that the same numerical control power supply system has the functions of constant voltage and constant current, and has higher output precision;
2. according to the invention, an MCU with high main frequency is not needed, and the voltage regulation unit is controlled only by generating a control signal through the MCU, so that accurate and reliable voltage regulation is realized;
3. the invention avoids the output stage from being directly influenced by the input voltage, so that the product performance of the wireless rapid charging technology is more stable, and the transmission power is controlled by adjusting the voltage through the fixed frequency, thereby effectively avoiding the communication interference of the wireless charging to the mobile phone.
Drawings
Fig. 1 is a schematic diagram of the structure of an IDAC voltage regulator circuit of the present invention based on wireless fast charging application;
FIG. 2 is a circuit diagram of a DC/DC converter and its peripheral circuits according to the present invention;
fig. 3 is a circuit diagram of an IDAC function block of the present invention.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An IDAC voltage regulating circuit based on wireless fast charging application is shown in fig. 1, and comprises an MCU processor, an IDAC functional module, a DC/DC converter and its peripheral circuits, wherein the MCU processor is connected to the DC/DC converter and its peripheral circuits through the IDAC functional module; the invention can realize digital control of output voltage, can realize that the same numerical control power supply system has the functions of constant voltage and constant current, and has higher output precision;
according to the invention, an MCU with high main frequency is not needed, and the voltage regulation unit is controlled only by generating a control signal through the MCU, so that accurate and reliable voltage regulation is realized; the invention avoids the output stage from being directly influenced by the input voltage, so that the product performance of the wireless rapid charging technology is more stable, and the transmission power is controlled by adjusting the voltage through the fixed frequency, thereby effectively avoiding the communication interference of the wireless charging to the mobile phone.
As shown in fig. 2, the DC/DC converter and its peripheral circuit includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first inductor L1, and a voltage VLNTerminal, voltage VDCDCTerminal, chip FR 9885;
wherein, the voltage VLNThe ends of the first capacitor C1 are respectively connected with one end of the first capacitor C1, one end of the second capacitor C2, one end of the third capacitor C3, one end of the first resistor R1 and the VIN interface of the chip FR9885, and the other end of the first capacitor C1 is respectively connected with the other end of the second capacitor C2, the other end of the third capacitor C3 and the GND end of the chip FR9885 and is grounded; the other end of the first resistor R1 is connected to the SHDN interface of the chip FR9885, the BST interface of the chip FR9885 is connected to one end of the ninth capacitor C9, the other end of the ninth capacitor C9 is connected to the LX interface of the chip FR9885 and one end of the first inductor L1, the other end of the first inductor L1 is connected to one end of the second resistor R2, one end of the fifth capacitor C5, one end of the sixth capacitor C6, one end of the seventh capacitor C7, one end of the eighth capacitor C8, and the voltage VDCDCAnd the other end of the second resistor R2 is connected with the other end of the fifth capacitor C5, one end of the third resistor R3, one end of the fourth resistor R4 and the FB interface of the chip FR9885 respectively, the other end of the third resistor R3 is grounded, the other end of the sixth capacitor C6, the other end of the seventh capacitor C7 and the other end of the eighth capacitor C8 are connected with the ground respectively, and the other end of the fourth resistor R4 is connected with the IDAC functional module.
The MCU processor is used for controlling the output current size and direction of the IDAC functional module. The IDAC functional module is a 6-bit current steering DAC and consists of two groups of current sources and two groups of switches. The voltage VDCDCThe target regulation range of the end is 4V to 11V. Based on wireless quick chargingIn a further preferred embodiment of the IDAC voltage regulator circuit, the resistance of the second resistor R2 is 220 kilo-ohms. The third resistor R3 is 12 kilo-ohms. The resistance value of the fourth resistor is 100 kilo-ohms.
Taking FR9885 as an example of a DC/DC chip, an implementation circuit of the IDAC scheme is shown in fig. 3, wherein an MCU controls the magnitude and direction of the output current of the IDAC functional module; the IDAC functional module is a 6-bit current steering DAC and consists of two groups of current sources and two groups of switches, and the current of each branch is marked as the figure. The MCU selects the total current out of the IDAC function by outputting digital signals d 0-d 6 to control switches S0-S6 and S0 '-S6', and selects the DAC output current reversal by outputting digital signal d7 to control switch S7. The IDAC is directly connected with the feedback end of the DC/DC through a pin at the position of the IDAC.
In the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. An IDAC voltage regulating circuit based on wireless quick charge application which characterized in that: the system comprises an MCU processor, an IDAC functional module, a DC/DC converter and a peripheral circuit thereof, wherein the MCU processor is connected with the DC/DC converter and the peripheral circuit thereof through the IDAC functional module;
the DC/DC converter and peripheral circuits thereof comprise a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first inductor L1 and a voltage VLNTerminal, voltage VDCDCTerminal, chip FR 9885;
wherein, the voltage VLNThe ends of the first capacitor C1 are respectively connected with one end of the first capacitor C1, one end of the second capacitor C2, one end of the third capacitor C3, one end of the first resistor R1 and the VIN interface of the chip FR9885, and the other end of the first capacitor C1 is respectively connected with the other end of the second capacitor C2, the other end of the third capacitor C3 and the GND end of the chip FR9885 and is grounded; the other end of the first resistor R1 is connected to the SHDN interface of the chip FR9885, the BST interface of the chip FR9885 is connected to one end of the ninth capacitor C9, the other end of the ninth capacitor C9 is connected to the LX interface of the chip FR9885 and one end of the first inductor L1, the other end of the first inductor L1 is connected to one end of the second resistor R2, one end of the fifth capacitor C5, one end of the sixth capacitor C6, one end of the seventh capacitor C7, one end of the eighth capacitor C8, and the voltage VDCDCAnd the other end of the second resistor R2 is connected with the other end of the fifth capacitor C5, one end of the third resistor R3, one end of the fourth resistor R4 and the FB interface of the chip FR9885 respectively, the other end of the third resistor R3 is grounded, the other end of the sixth capacitor C6, the other end of the seventh capacitor C7 and the other end of the eighth capacitor C8 are connected with the ground respectively, and the other end of the fourth resistor R4 is connected with the IDAC functional module.
2. The IDAC voltage regulator circuit for wireless fast charging applications as claimed in claim 1, wherein: the MCU processor is used for controlling the output current size and direction of the IDAC functional module.
3. The IDAC voltage regulator circuit for wireless fast charging applications as claimed in claim 1, wherein: the IDAC functional module is a 6-bit current steering DAC and consists of two groups of current sources and two groups of switches.
4. The IDAC voltage regulator circuit for wireless fast charging applications as claimed in claim 1, wherein: the voltage VDCDCThe target regulation range of the end is 4V to 11V.
5. The IDAC voltage regulator circuit for wireless fast charging applications as claimed in claim 1, wherein: the resistance of the second resistor R2 is 220 kilo-ohms.
6. The IDAC voltage regulator circuit for wireless fast charging applications as claimed in claim 1, wherein: the third resistor R3 is 12 kilo-ohms.
7. The IDAC voltage regulator circuit for wireless fast charging applications as claimed in claim 1, wherein: the resistance value of the fourth resistor is 100 kilo-ohms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110907007.1A CN113595198A (en) | 2021-08-09 | 2021-08-09 | IDAC voltage regulating circuit based on wireless quick charging application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110907007.1A CN113595198A (en) | 2021-08-09 | 2021-08-09 | IDAC voltage regulating circuit based on wireless quick charging application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113595198A true CN113595198A (en) | 2021-11-02 |
Family
ID=78256225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110907007.1A Withdrawn CN113595198A (en) | 2021-08-09 | 2021-08-09 | IDAC voltage regulating circuit based on wireless quick charging application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113595198A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114915352A (en) * | 2022-04-11 | 2022-08-16 | 南京理工大学 | PWM modulation-demodulation control system based on FPGA |
| CN116699296A (en) * | 2023-08-08 | 2023-09-05 | 辰芯半导体（深圳）有限公司 | Load detection circuit and electronic device |
-
2021
- 2021-08-09 CN CN202110907007.1A patent/CN113595198A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114915352A (en) * | 2022-04-11 | 2022-08-16 | 南京理工大学 | PWM modulation-demodulation control system based on FPGA |
| CN116699296A (en) * | 2023-08-08 | 2023-09-05 | 辰芯半导体（深圳）有限公司 | Load detection circuit and electronic device |
| CN116699296B (en) * | 2023-08-08 | 2023-10-31 | 辰芯半导体（深圳）有限公司 | Load detection circuit and electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10128746B2 (en) | Switched capacitor DC-DC power converter | |
| US6700440B2 (en) | High frequency power amplifier | |
| CN113595198A (en) | IDAC voltage regulating circuit based on wireless quick charging application | |
| KR100264897B1 (en) | Power providing method and device in mobile communication apparatus | |
| JP6434913B2 (en) | Power supply and power supply voltage adjustment method | |
| CN111313707B (en) | DC/DC power supply conversion system | |
| CN101060753B (en) | A drive circuit for adjusting backlight brightness | |
| US11652407B2 (en) | Switching capacitor converter and driving circuit | |
| CN213367459U (en) | Charging circuit, earphone box and earphone | |
| CN102904435A (en) | Modified compensating circuit and switching power supply applying modified compensating circuit | |
| CN111181393A (en) | Power supply device | |
| CN109768693B (en) | Current sharing control method, device and system and computer readable storage medium | |
| CN113224948B (en) | Switching power supply circuit, switching power supply chip and switching power supply system | |
| CN113271004A (en) | Adjustable boost power supply of high accuracy software | |
| CN212278120U (en) | Boost DC-DC control circuit | |
| CN111277134A (en) | Voltage conversion circuit and display device | |
| CN201726560U (en) | PWM light regulating circuit for LED | |
| CN107800202B (en) | Wireless power transmission impedance matching and voltage regulating circuit | |
| US20220352738A1 (en) | Charging control method of power supply equipment and power supply equipment | |
| US11916492B2 (en) | Device for supplying power from an AC voltage | |
| CN209897014U (en) | Power amplifier power supply circuit and terminal | |
| EP4318942A1 (en) | Power supply circuit for power amplifier and communication device | |
| CN103607113A (en) | Positive and negative voltage generation circuit | |
| CN209730437U (en) | A kind of low-power laser and its driving circuit | |
| KR20220050662A (en) | Switching regulator and operating method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211102 |
|
| WW01 | Invention patent application withdrawn after publication |