CN203503281U - External bias voltage driving circuit, MCU module and electrical product - Google Patents
External bias voltage driving circuit, MCU module and electrical product Download PDFInfo
- Publication number
- CN203503281U CN203503281U CN201320613750.7U CN201320613750U CN203503281U CN 203503281 U CN203503281 U CN 203503281U CN 201320613750 U CN201320613750 U CN 201320613750U CN 203503281 U CN203503281 U CN 203503281U
- Authority
- CN
- China
- Prior art keywords
- mcu
- divider resistance
- input interface
- triode
- capacitor
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses an external bias voltage driving circuit, an MCU module and an electrical product. In the prior art, MCU internal bias voltage is adopted to drive a liquid crystal display module, but under a condition that the mains supply or battery power supply is unavailable, power consumption of a battery is very great, the service life is short, and electricity quantity of the battery is used up after being used for several years. However, the circuit disclosed by the utility model can realize conversion between MCU driving liquid crystal voltage powered by the mains supply and MCU driving liquid crystal voltage powered by the battery. Furthermore, a first input interface VLC0 of an MCU is grounded through a capacitor C2 and a C1, an R1 and a Q1 form a circuit, so that the circuit can eliminate ghost images displayed on the liquid crystal display module during strong and weak current switching under the condition of strong and weak current switching. In addition, the power consumption of the battery can be reduced because of adoption of the external bias driving circuit.
Description
Technical field
The utility model relates to household electronic products technical field, in particular to a kind of external bias driving circuit, MCU module and electric equipment products.
Background technology
At present, along with constantly advancing of the technology of household electronic products, people also constantly promote the performance requirement of household electronic products.For example, along with the class of household electronic products improves constantly, people require this series products in the situation that pulling out civil power, still can show current local standard time, Beijing Today time accurately for example, this just requires in automatically controlled design, to consider with battery, to carry out the Unit to MCU(Micro Control in the situation that pulling out civil power, micro-control unit) power supply, to drive LCD MODULE to show the Beijing Today time, yet, in the middle of practical application in battery powered situation, in order to improve the life-span of battery, power consumption while reducing powered battery, in prior art, MCU often adopts internal bias voltage to drive LCD MODULE cannot meet above-mentioned requirements, because its power dissipation ratio is larger, and the life-span of its battery also can shorten.
Utility model content
In order to improve the serviceable life that adopts battery battery so that LCD MODULE is powered, and reduce the power consumption of driving circuit, the purpose of this utility model is to provide a kind of external bias driving circuit, MCU module and electric equipment products.
A kind of external bias driving circuit, it comprises divider resistance R1-R6, diode D1, triode Q1, and capacitor C 1 and C2, one end of described resistance R 6 is connected to the first power supply input VDD1, its other end is connected to respectively the first input interface VLC0 of micro-control unit MCU and one end of divider resistance R5, the other end of described divider resistance R5 is connected to respectively the second input interface VLC1 of MCU and one end of divider resistance R4, the other end of described divider resistance R4 is connected to respectively the 3rd input interface VLC2 of MCU and one end of divider resistance R3, the other end ground connection of described divider resistance R3, the anodic bonding of described diode D1 to second source is inputted VDD2, its negative electrode is connected to the base stage b of triode Q1 and emitter e the ground connection that meets triode Q1 by capacitor C 1 by divider resistance R1, the collector c of described triode Q1 is connected to the first input interface VLC0 of MCU by divider resistance R2, and the first input interface VLC0 of described MCU is also by capacitor C 2 ground connection.
A MCU module, it comprises:
MCU unit;
External bias driving circuit, it comprises divider resistance R1-R6, diode D1, triode Q1, and capacitor C 1 and C2, one end of described resistance R 6 is connected to the first power supply input VDD1, its other end is connected to respectively the first input interface VLC0 of micro-control unit MCU and one end of divider resistance R5, the other end of described divider resistance R5 is connected to respectively the second input interface VLC1 of MCU and one end of divider resistance R4, the other end of described divider resistance R4 is connected to respectively the 3rd input interface VLC2 of MCU and one end of divider resistance R3, the other end ground connection of described divider resistance R3, the anodic bonding of described diode D1 to second source is inputted VDD2, its negative electrode is connected to the base stage b of triode Q1 and emitter e the ground connection that meets triode Q1 by capacitor C 1 by divider resistance R1, the collector c of described triode Q1 is connected to the first input interface VLC0 of MCU by divider resistance R2, and the first input interface VLC0 of described MCU is also by capacitor C 2 ground connection.
Electric equipment products, it comprises MCU module as above, described MCU module comprises:
MCU unit;
External bias driving circuit, it comprises divider resistance R1-R6, diode D1, triode Q1, and capacitor C 1 and C2, one end of described resistance R 6 is connected to the first power supply input VDD1, its other end is connected to respectively the first input interface VLC0 of micro-control unit MCU and one end of divider resistance R5, the other end of described divider resistance R5 is connected to respectively the second input interface VLC1 of MCU and one end of divider resistance R4, the other end of described divider resistance R4 is connected to respectively the 3rd input interface VLC2 of MCU and one end of divider resistance R3, the other end ground connection of described divider resistance R3, the anodic bonding of described diode D1 to second source is inputted VDD2, its negative electrode is connected to the base stage b of triode Q1 and emitter e the ground connection that meets triode Q1 by capacitor C 1 by divider resistance R1, the collector c of described triode Q1 is connected to the first input interface VLC0 of MCU by divider resistance R2, and the first input interface VLC0 of described MCU is also by capacitor C 2 ground connection.
Than existing scheme, adopt the internal bias voltage of MCU to drive LCD MODULE, but it is without civil power (powered battery) in the situation that, battery power consumption is very large, life-span is short, often battery electric weight after using several years just exhausts, and employing the utility model, this circuit can be realized the conversion of mains-supplied and battery powered MCU driving voltage, and because the first input interface VLC0 of MCU passes through capacitor C 2 ground connection and C1, R1, the loop that Q1 forms, so that this circuit is under situation about switching between strong and weak electricity, can eliminate the ghost showing when strong and weak electricity switches in LCD MODULE, in addition, this circuit is owing to adopting external bias driving circuit, it can reduce the power consumption of battery.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of external bias driving circuit of providing of the utility model embodiment;
Fig. 2 is the equivalent circuit diagram of a kind of external bias driving circuit of providing of the utility model embodiment under mains-supplied situation;
Fig. 3 is the equivalent circuit diagram of a kind of external bias driving circuit of providing of the utility model embodiment under powered battery situation.
The realization of the utility model object, functional characteristics and excellent effect, be described further below in conjunction with specific embodiment and accompanying drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme described in the utility model is described in further detail, so that those skilled in the art can better understand the utility model being implemented, but illustrated embodiment is not as to restriction of the present utility model.
As shown in Figure 1, a kind of external bias driving circuit that the utility model embodiment provides, it comprises divider resistance R1-R6, diode D1, triode Q1, and capacitor C 1 and C2, one end of described resistance R 6 is connected to the first power supply input VDD1, its other end is connected to respectively the first input interface VLC0 of micro-control unit MCU and one end of divider resistance R5, the other end of described divider resistance R5 is connected to respectively the second input interface VLC1 of MCU and one end of divider resistance R4, the other end of described divider resistance R4 is connected to respectively the 3rd input interface VLC2 of MCU and one end of divider resistance R3, the other end ground connection of described divider resistance R3, the anodic bonding of described diode D1 to second source is inputted VDD2, its negative electrode is connected to the base stage b of triode Q1 and emitter e the ground connection that meets triode Q1 by capacitor C 1 by divider resistance R1, the collector c of described triode Q1 is connected to the first input interface VLC0 of MCU by divider resistance R2, and the first input interface VLC0 of described MCU is also by capacitor C 2 ground connection.
Wherein, the voltage input that the VCL0 on MCU, VCL1, VCL2 are 3 can be combined into target voltage values to drive LCD MODULE according to prior art, herein this is not carefully stated.
With reference to figure 2, it shows a kind of external bias driving circuit that the utility model embodiment provides equivalent circuit diagram under mains-supplied situation, when having in the situation of civil power, the first power supply input VDD1 and second source input VDD2 all have electricity, battery is not powered, now triode Q1 conducting, and the equivalent circuit of its formation is as shown in Figure 2, by the dividing potential drop effect of described resistance R 2-R6, obtain the magnitude of voltage of wanting on MCU first-tri-input interface VCL0, VCL1, VCL2 at 3.
With reference to figure 3, it shows a kind of external bias driving circuit that the utility model embodiment provides equivalent circuit diagram under powered battery situation, in the situation without civil power, the second source input VDD2 being electrically connected to city is without electricity, the the first power supply input VDD1 being connected with the Voltage-output interface of battery is battery-powered, now triode Q1 cut-off, the equivalent circuit forming as shown in Figure 3, with this, by the dividing potential drop effect of described resistance R 3-R6, obtain the magnitude of voltage of wanting on MCU first-tri-input interface VCL0, VCL1, VCL2 at 3.
And, when pulling out civil power and being switched to powered battery, voltage hour on VDD2, but the voltage that now can store by capacitor C 2 maintains the conducting of triode Q1 within a period of time, thereby play the effect of smooth voltage, and, allow voltage on VDD1 slowly near cell voltage, thereby there is the phenomenon of ghost in the LCD MODULE that is unlikely to be driven by MCU.
The utility model embodiment also provides a kind of MCU module, and it comprises:
MCU unit;
External bias driving circuit, with reference to figure 1, it comprises divider resistance R1-R6, diode D1, triode Q1, and capacitor C 1 and C2, one end of described resistance R 6 is connected to the first power supply input VDD1, its other end is connected to respectively the first input interface VLC0 of micro-control unit MCU and one end of divider resistance R5, the other end of described divider resistance R5 is connected to respectively the second input interface VLC1 of MCU and one end of divider resistance R4, the other end of described divider resistance R4 is connected to respectively the 3rd input interface VLC2 of MCU and one end of divider resistance R3, the other end ground connection of described divider resistance R3, the anodic bonding of described diode D1 to second source is inputted VDD2, its negative electrode is connected to the base stage b of triode Q1 and emitter e the ground connection that meets triode Q1 by capacitor C 1 by divider resistance R1, the collector c of described triode Q1 is connected to the first input interface VLC0 of MCU by divider resistance R2, and the first input interface VLC0 of described MCU is also by capacitor C 2 ground connection.
In addition, the utility model embodiment also provides a kind of electric equipment products, and described electric equipment products include but not limited to electric cooker, electric pressure cooking saucepan, electric kettle etc., and it comprises MCU module as above, and described MCU module comprises:
MCU unit;
External bias driving circuit, continuation is with reference to figure 1, it comprises divider resistance R1-R6, diode D1, triode Q1, and capacitor C 1 and C2, one end of described resistance R 6 is connected to the first power supply input VDD1, its other end is connected to respectively the first input interface VLC0 of micro-control unit MCU and one end of divider resistance R5, the other end of described divider resistance R5 is connected to respectively the second input interface VLC1 of MCU and one end of divider resistance R4, the other end of described divider resistance R4 is connected to respectively the 3rd input interface VLC2 of MCU and one end of divider resistance R3, the other end ground connection of described divider resistance R3, the anodic bonding of described diode D1 to second source is inputted VDD2, its negative electrode is connected to the base stage b of triode Q1 and emitter e the ground connection that meets triode Q1 by capacitor C 1 by divider resistance R1, the collector c of described triode Q1 is connected to the first input interface VLC0 of MCU by divider resistance R2, and the first input interface VLC0 of described MCU is also by capacitor C 2 ground connection.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (3)
1. an external bias driving circuit, it is characterized in that, comprise divider resistance R1-R6, diode D1, triode Q1, and capacitor C 1 and C2, one end of described resistance R 6 is connected to the first power supply input VDD1, its other end is connected to respectively the first input interface VLC0 of micro-control unit MCU and one end of divider resistance R5, the other end of described divider resistance R5 is connected to respectively the second input interface VLC1 of MCU and one end of divider resistance R4, the other end of described divider resistance R4 is connected to respectively the 3rd input interface VLC2 of MCU and one end of divider resistance R3, the other end ground connection of described divider resistance R3, the anodic bonding of described diode D1 to second source is inputted VDD2, its negative electrode is connected to the base stage b of triode Q1 and emitter e the ground connection that meets triode Q1 by capacitor C 1 by divider resistance R1, the collector c of described triode Q1 is connected to the first input interface VLC0 of MCU by divider resistance R2, and the first input interface VLC0 of described MCU is also by capacitor C 2 ground connection.
2. a MCU module, is characterized in that, comprising:
MCU unit;
External bias driving circuit, it comprises divider resistance R1-R6, diode D1, triode Q1, and capacitor C 1 and C2, one end of described resistance R 6 is connected to the first power supply input VDD1, its other end is connected to respectively the first input interface VLC0 of micro-control unit MCU and one end of divider resistance R5, the other end of described divider resistance R5 is connected to respectively the second input interface VLC1 of MCU and one end of divider resistance R4, the other end of described divider resistance R4 is connected to respectively the 3rd input interface VLC2 of MCU and one end of divider resistance R3, the other end ground connection of described divider resistance R3, the anodic bonding of described diode D1 to second source is inputted VDD2, its negative electrode is connected to the base stage b of triode Q1 and emitter e the ground connection that meets triode Q1 by capacitor C 1 by divider resistance R1, the collector c of described triode Q1 is connected to the first input interface VLC0 of MCU by divider resistance R2, and the first input interface VLC0 of described MCU is also by capacitor C 2 ground connection.
3. electric equipment products, is characterized in that, it comprises MCU module as claimed in claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613750.7U CN203503281U (en) | 2013-09-30 | 2013-09-30 | External bias voltage driving circuit, MCU module and electrical product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613750.7U CN203503281U (en) | 2013-09-30 | 2013-09-30 | External bias voltage driving circuit, MCU module and electrical product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203503281U true CN203503281U (en) | 2014-03-26 |
Family
ID=50334241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320613750.7U Expired - Fee Related CN203503281U (en) | 2013-09-30 | 2013-09-30 | External bias voltage driving circuit, MCU module and electrical product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203503281U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873592A (en) * | 2018-08-31 | 2020-03-10 | 佛山市顺德区美的电热电器制造有限公司 | Detection circuit, flow sensor and household appliance |
-
2013
- 2013-09-30 CN CN201320613750.7U patent/CN203503281U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873592A (en) * | 2018-08-31 | 2020-03-10 | 佛山市顺德区美的电热电器制造有限公司 | Detection circuit, flow sensor and household appliance |
| CN110873592B (en) * | 2018-08-31 | 2021-08-27 | 佛山市顺德区美的电热电器制造有限公司 | Detection circuit, flow sensor and household appliance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103165084B (en) | Liquid crystal display and LED backlight thereof | |
| CN201917839U (en) | Automatic maintaining voltage adjusting circuit for PDP (Plasma Display Panel) display screen | |
| CN101604909B (en) | Starting circuit for direct-current switch power supply | |
| CN203503281U (en) | External bias voltage driving circuit, MCU module and electrical product | |
| CN202996717U (en) | Relay drive circuit in resistance-capacitance voltage drop-down circuit | |
| CN208834723U (en) | Multi-channel LED backlight drive circuit and LCD TV | |
| CN201479012U (en) | High-isolation DC-DC power supply device | |
| CN205647301U (en) | Energy storage system based on heat up - electrolyzer more | |
| CN104092376B (en) | A kind of Novel DC multilevel decompression mu balanced circuit | |
| CN103354083A (en) | Backlight drive circuit and display device | |
| CN203984247U (en) | A kind of Novel DC multilevel decompression voltage stabilizing circuit | |
| CN203278644U (en) | A charge pump capable of converting positive voltage into negative voltage with a value twice the value of the positive voltage | |
| CN102522893A (en) | Novel power supply circuit | |
| CN202004673U (en) | Step-down power circuit architecture | |
| CN207926454U (en) | The low and big output current constant-current supply suitable for output voltage | |
| CN202168050U (en) | High-frequency high-voltage pulse generator | |
| CN203261521U (en) | LED switch power supply circuit | |
| CN203644386U (en) | Drive circuit for controlling buzzer of remote controller | |
| CN203747777U (en) | Reset circuit | |
| CN203313052U (en) | Power factor correction drive circuit | |
| CN203180885U (en) | Optical control circuit based on decimal counter pulse frequency divider | |
| CN2632839Y (en) | Electric saving relay driven by high-low level control pulse current | |
| CN203261314U (en) | Modulator circuit based on NAND gate integrated circuit | |
| CN202008767U (en) | Automatic control demonstrating instrument with diode | |
| CN201550018U (en) | DC switch power supply start-up circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20200930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |