CN201985759U - DCDC (direct current direct current) output circuit - Google Patents
DCDC (direct current direct current) output circuit Download PDFInfo
- Publication number
- CN201985759U CN201985759U CN2011200500729U CN201120050072U CN201985759U CN 201985759 U CN201985759 U CN 201985759U CN 2011200500729 U CN2011200500729 U CN 2011200500729U CN 201120050072 U CN201120050072 U CN 201120050072U CN 201985759 U CN201985759 U CN 201985759U
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- dcdc
- triode
- divider resistance
- circuit
- voltage
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Abstract
The utility model discloses a DCDC (direct current direct current) output circuit which comprises an input power, a DCDC converter and an inductor. The input power is connected with the DCDC converter; the output pin of the DCDC converter is connected with one end of the inductor; an output terminal is connected with the other end of the inductor, wherein the DCDC output circuit also comprises a regulating circuit; the regulating circuit comprises a first divider resistor, a second divider resistor, a regulating resistor and a triode; one end of the first divider resistor is connected with the inductor and the output terminal, and the other end of the first divider resistor is connected with the feedback pin of the DCDC converter; one end of the second divider resistor is earthed and the other end of the second divider resistor is connected with the feedback pin; the first divider resistor and the second divider resistor are connected in series; one end of the regulating resistor is connected with the feedback pin, and the other end of the regulating resistor is connected with a collector of the triode; the emitting electrode of the triode is earthed, and a base of the triode is connected with an external control circuit. The DCDC output circuit can regulate and change an outputted voltage value as requires, is suitable to be used for appliances with different specifications and parameters, is more convenient to use and has broad serviceable range.
Description
Technical field
The utility model relates to the electric equipment field, relates more specifically to the DCDC output circuit in a kind of power circuit.
Background technology
DCDC also is the DCDC transducer usually, is exactly direct current is become (arriving) direct current (conversions of different DC power supply values).Specifically be meant by self-maintained circuit the direct current of input is changed into alternating current, change voltage by transformer again and be converted to afterwards direct current output again, perhaps alternating current is converted to high voltage direct current output by voltage doubling rectifing circuit.The DCDC transducer is divided three classes: step-up DC/DC transducer, voltage-dropping type DCDC transducer and buck-boost type DCDC transducer.Can adopt the control of three classes according to demand.The PWM control type, the efficient height also has good output voltage ripple and noise; The PFM control type is even long-time have the little advantage of power consumption when using especially little load; Carry out PFM control when PWM/PFM conversion hysteria, little load, and when heavy duty, be transformed into PWM control automatically.The DCDC transducer is widely used in the products such as mobile phone, MP3, digital camera, portable electronic device at present.
DCDC transducer commonly used is now exported the direct current of input the another kind of direct current of fixed numbers after conversion, and its output voltage values is immutable, make a DCDC output circuit to provide suitable magnitude of voltage for one type electricity consumption device, when changing the electricity consumption device that uses other type, also need the corresponding DCDC output circuit that uses with different output voltage values, therefore use inconvenience, the use electricity consumption device of whole DCDC output circuit also is restricted.
Therefore, be necessary that the DCDC output circuit that provides a kind of improved scalable to change output voltage values overcomes above-mentioned defective.
The utility model content
The purpose of this utility model provides a kind of DCDC output circuit, and this DCDC output circuit can be regulated the magnitude of voltage that changes output on demand, and the electricity consumption device that is suitable for the different size parameter uses, and uses more conveniently, and the scope of application is more extensive.
For achieving the above object, the utility model provides a kind of DCDC output circuit, described DCDC output circuit comprises input power supply DCDC transducer and inductance, described input power supply is connected with described DCDC transducer and powers and give described DCDC transducer, the output pin of described DCDC transducer is exported square-wave voltage and is connected with an end of described inductance, one lead-out terminal is connected in the other end of described inductance to connect the electricity consumption device, wherein, also comprise regulating circuit, described regulating circuit comprises first divider resistance, second divider resistance, regulate resistance and triode, described first divider resistance, one end is connected with described inductance and described lead-out terminal, the other end is connected in the feedback pin of described DCDC transducer, described second divider resistance, the one end ground connection other end is connected with the feedback pin of described DCDC transducer, and described first divider resistance and second divider resistance are connected in series, described adjusting resistance one end is connected in the feedback pin of described DCDC transducer, the other end is connected with the collector electrode of described triode, the grounded emitter of described triode, its base stage is connected with external control circuit, and external control circuit is controlled the conducting of described triode and ended.
Preferably, described adjusting resistance is rheostat.
Preferably, described DCDC output circuit also comprises an electric capacity, and described electric capacity one end is connected between described inductance and the lead-out terminal, and the other end is connected with the feedback pin of described DCDC transducer.
Compared with prior art, DCDC output circuit of the present utility model, because described first divider resistance, one end is connected with described inductance and described lead-out terminal, the other end is connected in the feedback pin of described DCDC transducer, described second divider resistance, the one end ground connection other end is connected with the feedback pin of described DCDC transducer, and described first divider resistance and second divider resistance are connected in series, described adjusting resistance one end is connected in the feedback pin of described DCDC transducer, the other end is connected with the collector electrode of described triode, the grounded emitter of described triode, its base stage is connected with external control circuit; Thereby described adjusting resistance is connected the back with described triode and second divider resistance is connected in parallel, thereby under the described triode conducting and the situation of ending, described triode connect with described adjusting resistance and with total resistance value after described second divider resistance is in parallel with different, resistance ratio between described first divider resistance and second divider resistance is changed, have again because the voltage on the feedback pin of described DCDC transducer is the magnitude of voltage of fixed numbers, thereby scalable changes the magnitude of voltage on described first divider resistance, that is to say to regulate the output voltage values that changes on the described lead-out terminal.DCDC output circuit of the present utility model can be controlled the conducting of described triode on demand or by to change the magnitude of voltage of whole DCDC power circuit output, be suitable for the electric equipment use of different size parameter, and more convenient from the face use, the scope of application is more extensive.
By following description also in conjunction with the accompanying drawings, it is more clear that the utility model will become, and these accompanying drawings are used to explain embodiment of the present utility model.
Description of drawings
Fig. 1 is the structure principle chart of the utility model DCDC output circuit.
Embodiment
With reference now to accompanying drawing, describe embodiment of the present utility model, the similar elements label is represented similar elements in the accompanying drawing.As mentioned above, the utility model provides a kind of DCDC output circuit, and this DCDC output circuit can be regulated the magnitude of voltage that changes output on demand, and the electricity consumption device that is suitable for the different size parameter uses, and uses more conveniently, and the scope of application is more extensive.
Please refer to Fig. 1, Fig. 1 is the structure principle chart of the utility model DCDC output circuit.As shown in the figure, described DCDC output circuit comprises input power supply V1, DCDC transducer U1, inductance L 1, lead-out terminal OUT1 and regulating circuit; Described DCDC transducer U1 is a general DCDC conversion chip, particularly, in embodiment of the present utility model, described DCDC transducer U1 is that model is the DCDC conversion chip of BS3406ADJ, described DCDC transducer U1 has output pin SW, feedback pin FB and two input pin IN, EN, described output pin SW is connected with an end of described inductance L 1, to export square-wave voltage to described inductance L 1, when described DCDC transducer U1 works, voltage on the described feedback pin FB is voltage (the concrete principle effect of this chip of fixed numbers, be well known to those skilled in the art, no longer add explanation) at this; The output of described input power supply V1 is connected with two input pin IN, the EN of described DCDC transducer U1 respectively, think described DCDC transducer U1 input voltage, so that described DCDC transducer is in running order always, but in embodiment of the present utility model, described input pin EN can directly not be connected with described input power supply V1 yet, and connect control circuit in addition with the startup of controlling described DCDC transducer or close, in use can select to use suitable connected mode by actual needs; The other end of described inductance L 1 is connected with described lead-out terminal OUT1 and regulating circuit respectively, the voltage of the output pin SW output of 1 couple of described DCDC transducer U1 of described inductance L carries out filtering, providing stably voltage, and export to the electricity consumption device by described lead-out terminal OUT1 to described regulating circuit.Described regulating circuit is connected between described lead-out terminal OUT1 and the described inductance L 1, exports to the electricity consumption device to regulate through the magnitude of voltage of described inductance L 1 filtered described DCDC transducer U1 output and by described lead-out terminal OUT1.
Wherein, described regulating circuit comprises the first divider resistance R1, the second divider resistance R2, regulates resistance and triode Q1; The described first divider resistance R1, one end is connected with described inductance L 1 and described lead-out terminal OUT1 respectively, and the other end is connected in the feedback pin FB of described DCDC transducer U1; The described second divider resistance R2, the one end ground connection other end is connected with the feedback pin FB of described DCDC transducer U1, and the described first divider resistance R1 and the second divider resistance R2 are connected in series; In preferred embodiment of the present utility model, described adjusting resistance is rheostat R3, described rheostat R3 one end is connected in the feedback pin FB of described DCDC transducer U1, the other end is connected with the collector electrode C of described triode Q1, the emitter E ground connection of described triode Q1, and the base stage B of described triode Q1 is connected with external control circuit (figure does not show), and described external control circuit is controlled the conducting of described triode Q1 and ended.
In addition, in the utility model DCDC output circuit, also being provided with filter capacitor C1, C2, the concrete connection of C4, C5(as shown in Figure 1) each filter capacitor is mainly used in the various clutters in the filtering circuit, so that the exportable voltage stably of circuit; And described filter capacitor C4, C5 constitute the LC filter circuit with described inductance L 1, and the voltage that described DCDC transducer U1 is exported carries out filtering, so that described lead-out terminal OUT1 exports direct current stably.Wherein, the concrete operation principle and the characteristic of each filter capacitor and LC filter circuit all are well known to those skilled in the art, and are not described in detail in this.
Continue below with reference to figure 1, describe adjustment process and the Principles of Regulation of the utility model DCDC output circuit output voltage.The output pin SW of described DCDC transducer U1 is by the direct voltage of output rating number after described inductance L 1 and filter capacitor C4, the C5 filtering, this output voltage is by the described first divider resistance R1 and the second divider resistance R2 dividing potential drop, because the end of the described first divider resistance R1 is connected with described lead-out terminal OUT1, and the described second divider resistance R2 ground connection, therefore the total voltage value on the described first divider resistance R1 and the second divider resistance R2 is the output voltage values on the described lead-out terminal OUT1; Described rheostat R3 is connected the back and is connected in parallel with the described second divider resistance R2 with described triode Q1, when described triode Q1 conducting or by and the resistance of regulating described rheostat R3 during in triode Q1 conducting, all can change the total resistance value after described rheostat R3 is connected the back with described triode Q1 and the described second divider resistance R2 is in parallel, so can change the resistance ratio between the described first divider resistance R1 and the second divider resistance R2; Have again, because the voltage on the described feedback pin FB is the voltage of fixed numbers, make that the magnitude of voltage on the described second divider resistance R2 also is a fixed value, thereby the total resistance value of the described second divider resistance R2 place circuit has changed, but magnitude of voltage does not change on it, cause the variation of voltage to be fed back on the described first divider resistance R1, magnitude of voltage on the described first divider resistance R1 is changed, so that magnitude of voltage in the entire circuit and resistance value are coordinated to change, that is to say that the voltage on the described lead-out terminal OUT1 changes, reach the purpose of regulating output voltage.From the above, can be by regulating described rheostat R3 or controlling the conducting of described triode Q1 or end the output voltage of regulating described lead-out terminal OUT1, so that DCDC output circuit of the present utility model is applicable to the electricity consumption device of different size parameter by described external control circuit.
Preferably, also be connected with a capacitor C 3 on the described lead-out terminal OUT1, described capacitor C 3 one ends are connected between described inductance L 1 and the lead-out terminal OUT1, and the other end is connected with the feedback pin FB of described DCDC transducer U1, the concrete connection as shown in Figure 1.The main effect of described capacitor C 3 in this circuit is: when described DCDC transducer U1 has just switched on work, voltage on the described lead-out terminal OUT1 rises since 0, because the voltage at described capacitor C 3 two ends can not suddenly change, make voltage on the described lead-out terminal OUT1 of voltage follow of the other end (promptly feeding back pin FB) of described capacitor C 3, so the voltage of described feedback pin FB just can reach its constant magnitude of voltage when the voltage of described lead-out terminal OUT1 also hangs down, so that the magnitude of voltage on the described lead-out terminal OUT1 slowly rises, prevent that magnitude of voltage on the described lead-out terminal OUT1 from rising too fast and may cause the problem of impulse current; When described triode Q1 conducting, same because the voltage at described capacitor C 3 two ends can not suddenly change, so the voltage of feedback FB pin is just more stable, thereby make that the voltage voltage when described triode Q1 conducting on the described lead-out terminal OUT1 also is slowly to change.
Abovely the utility model is described, but the utility model is not limited to the embodiment of above announcement, and should contains various modification, equivalent combinations of carrying out according to essence of the present utility model in conjunction with most preferred embodiment.
Claims (3)
1. DCDC output circuit, comprise the input power supply, DCDC transducer and inductance, described input power supply is connected with described DCDC transducer and powers and give described DCDC transducer, the output pin of described DCDC transducer is exported square-wave voltage and is connected with an end of described inductance, one lead-out terminal is connected in the other end of described inductance to connect the electricity consumption device, it is characterized in that, also comprise regulating circuit, described regulating circuit comprises first divider resistance, second divider resistance, regulate resistance and triode, described first divider resistance, one end is connected with described inductance and described lead-out terminal, the other end is connected in the feedback pin of described DCDC transducer, described second divider resistance, the one end ground connection other end is connected with the feedback pin of described DCDC transducer, and described first divider resistance and second divider resistance are connected in series, described adjusting resistance one end is connected in the feedback pin of described DCDC transducer, the other end is connected with the collector electrode of described triode, the grounded emitter of described triode, its base stage is connected with external control circuit, and external control circuit is controlled the conducting of described triode and ended.
2. DCDC output circuit as claimed in claim 1 is characterized in that, described adjusting resistance is rheostat.
3. DCDC output circuit as claimed in claim 1 is characterized in that, also comprises an electric capacity, and described electric capacity one end is connected between described inductance and the lead-out terminal, and the other end is connected with the feedback pin of described DCDC transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200500729U CN201985759U (en) | 2011-02-28 | 2011-02-28 | DCDC (direct current direct current) output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200500729U CN201985759U (en) | 2011-02-28 | 2011-02-28 | DCDC (direct current direct current) output circuit |
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| CN201985759U true CN201985759U (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200500729U Expired - Lifetime CN201985759U (en) | 2011-02-28 | 2011-02-28 | DCDC (direct current direct current) output circuit |
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| CN (1) | CN201985759U (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103078529A (en) * | 2012-12-31 | 2013-05-01 | 江苏一同环保工程技术有限公司 | High-power high-frequency high-voltage series composition rectifier transformer |
| CN103117658A (en) * | 2013-01-24 | 2013-05-22 | 福州欣联达电子科技有限公司 | Method and circuit of series control voltage fine controlling power source |
| CN106100306A (en) * | 2016-08-11 | 2016-11-09 | 四川九州电子科技股份有限公司 | Improve the circuit of power supply circuits ripple |
| CN106100389A (en) * | 2016-08-26 | 2016-11-09 | 成都众乐泰科技有限公司 | A kind of AC DC change-over circuit based on digital control circuit |
| CN106100390A (en) * | 2016-08-26 | 2016-11-09 | 成都众乐泰科技有限公司 | A kind of AC DC change-over circuit of continuous transformation |
| CN106100331A (en) * | 2016-08-26 | 2016-11-09 | 成都众乐泰科技有限公司 | A kind of voltage follower circuit based on Digital Circuit Control |
| CN106253071A (en) * | 2016-08-26 | 2016-12-21 | 成都众乐泰科技有限公司 | A kind of multipurpose protection equipment of voltage controlable electric current digital control circuit |
| CN106253703A (en) * | 2016-08-26 | 2016-12-21 | 成都众乐泰科技有限公司 | A kind of controlled rectification output commutating voltage circuit |
| CN106374753A (en) * | 2016-11-18 | 2017-02-01 | 昂宝电子（上海）有限公司 | Power conversion system and control method thereof |
| CN107704007A (en) * | 2017-10-19 | 2018-02-16 | 广州视源电子科技股份有限公司 | Controllable direct current power supply and sphygmomanometer air pump control device |
| CN108233711A (en) * | 2018-01-16 | 2018-06-29 | 四川安迪科技实业有限公司 | A kind of LNB polarization power supplies power-supplying circuit |
| CN108334183A (en) * | 2018-01-26 | 2018-07-27 | 山东超越数控电子股份有限公司 | A kind of supply voltage automatic adjusument circuit |
| CN110138218A (en) * | 2019-06-25 | 2019-08-16 | 深圳市海浦蒙特科技有限公司 | A kind of band-type brake power supply of adjustable output voltage |
| CN111431402A (en) * | 2020-05-01 | 2020-07-17 | 广东博智林机器人有限公司 | Voltage conversion output circuit |
| CN111614254A (en) * | 2020-04-29 | 2020-09-01 | 华为技术有限公司 | Power supply circuit |
| CN112350575A (en) * | 2020-09-11 | 2021-02-09 | 苏州浪潮智能科技有限公司 | Buck circuit for dynamically adjusting output voltage and dynamic adjusting method |
-
2011
- 2011-02-28 CN CN2011200500729U patent/CN201985759U/en not_active Expired - Lifetime
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103078529A (en) * | 2012-12-31 | 2013-05-01 | 江苏一同环保工程技术有限公司 | High-power high-frequency high-voltage series composition rectifier transformer |
| CN103117658A (en) * | 2013-01-24 | 2013-05-22 | 福州欣联达电子科技有限公司 | Method and circuit of series control voltage fine controlling power source |
| CN103117658B (en) * | 2013-01-24 | 2015-10-28 | 福州欣联达电子科技有限公司 | A kind of method of Serial Control voltage fine power supply and circuit |
| CN106100306A (en) * | 2016-08-11 | 2016-11-09 | 四川九州电子科技股份有限公司 | Improve the circuit of power supply circuits ripple |
| CN106100389A (en) * | 2016-08-26 | 2016-11-09 | 成都众乐泰科技有限公司 | A kind of AC DC change-over circuit based on digital control circuit |
| CN106100390A (en) * | 2016-08-26 | 2016-11-09 | 成都众乐泰科技有限公司 | A kind of AC DC change-over circuit of continuous transformation |
| CN106100331A (en) * | 2016-08-26 | 2016-11-09 | 成都众乐泰科技有限公司 | A kind of voltage follower circuit based on Digital Circuit Control |
| CN106253071A (en) * | 2016-08-26 | 2016-12-21 | 成都众乐泰科技有限公司 | A kind of multipurpose protection equipment of voltage controlable electric current digital control circuit |
| CN106253703A (en) * | 2016-08-26 | 2016-12-21 | 成都众乐泰科技有限公司 | A kind of controlled rectification output commutating voltage circuit |
| CN106374753A (en) * | 2016-11-18 | 2017-02-01 | 昂宝电子（上海）有限公司 | Power conversion system and control method thereof |
| CN107704007A (en) * | 2017-10-19 | 2018-02-16 | 广州视源电子科技股份有限公司 | Controllable direct current power supply and sphygmomanometer air pump control device |
| CN108233711A (en) * | 2018-01-16 | 2018-06-29 | 四川安迪科技实业有限公司 | A kind of LNB polarization power supplies power-supplying circuit |
| CN108334183A (en) * | 2018-01-26 | 2018-07-27 | 山东超越数控电子股份有限公司 | A kind of supply voltage automatic adjusument circuit |
| CN108334183B (en) * | 2018-01-26 | 2021-06-29 | 山东超越数控电子股份有限公司 | Power supply voltage self-adaptive adjusting circuit |
| CN110138218A (en) * | 2019-06-25 | 2019-08-16 | 深圳市海浦蒙特科技有限公司 | A kind of band-type brake power supply of adjustable output voltage |
| CN110138218B (en) * | 2019-06-25 | 2020-08-11 | 深圳市海浦蒙特科技有限公司 | Band-type brake power supply with adjustable output voltage |
| CN111614254A (en) * | 2020-04-29 | 2020-09-01 | 华为技术有限公司 | Power supply circuit |
| WO2021219027A1 (en) * | 2020-04-29 | 2021-11-04 | 荣耀终端有限公司 | Power supply circuit |
| CN111614254B (en) * | 2020-04-29 | 2021-12-31 | 荣耀终端有限公司 | Power supply circuit |
| CN111431402A (en) * | 2020-05-01 | 2020-07-17 | 广东博智林机器人有限公司 | Voltage conversion output circuit |
| CN112350575A (en) * | 2020-09-11 | 2021-02-09 | 苏州浪潮智能科技有限公司 | Buck circuit for dynamically adjusting output voltage and dynamic adjusting method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGZHOU SHIYUAN ELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER NAME: GUANGZHOU CVT ELECTRONICS TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Guangdong city of Guangzhou province Guangzhou Science City Kezhu Road No. 192 Patentee after: Guangzhou CVT Electronics Technology Co., Ltd. Address before: 510663 Guangdong city of Guangzhou province Guangzhou Science City Kezhu Road No. 192 Patentee before: Guangzhou Shiyuan Electronics Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20110921 |
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| CX01 | Expiry of patent term |