CN203086341U - DC-DC (Direct Current to Direct Current) circuit - Google Patents
DC-DC (Direct Current to Direct Current) circuit Download PDFInfo
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- CN203086341U CN203086341U CN 201320101656 CN201320101656U CN203086341U CN 203086341 U CN203086341 U CN 203086341U CN 201320101656 CN201320101656 CN 201320101656 CN 201320101656 U CN201320101656 U CN 201320101656U CN 203086341 U CN203086341 U CN 203086341U
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Abstract
The utility model relates to a DC-DC (Direct Current to Direct Current) circuit. The DC-DC circuit comprises a first input/output terminal PORT 1, a second input/output terminal PORT 2, a first switch tube Q1, a second switch tube Q2, a first pulse input terminal PWM1, a second pulse input terminal PWM2, a first capacitor C1, a second capacitor C2, a first diode D1, a second diode D2 and an inductor L1. When pulse signals are input from the first pulse input terminal PWM1 and high-level signals are input from the second pulse input terminal PWM2, a BUCK circuit is formed by the Q1, the D2, the L1 and the C2; and when the pulse signals are input from the second pulse input terminal PWM2 and the high-level signals are input from the first pulse input terminal PWM1, a BOOST circuit is formed by the Q2, the D1, the L1 and the C1. The DC-DC circuit can serve as the BUCK circuit and can also serve as the BOOST circuit; and when the DC-DC circuit is applied to a circuit of portable electronic equipment, the circuit space occupation is little, and the circuit cost is low.
Description
Technical field
The utility model relates to a kind of DC-DC circuit, is specifically related to a kind of BUCK circuit that both can be used as and uses, and also can be used as the DC-DC circuit that the BOOST circuit uses.
Background technology
Common DC-DC (DC-DC) circuit generally can be divided into three kinds: BUCK circuit (reduction voltage circuit), BOOST circuit (booster circuit) and BUCK-BOOST circuit (step-up/step-down circuit).Almost all can use two kinds of DC-DC circuit: between charger and battery, adopt the BUCK circuit to carry out the step-down charging at all portable electric appts; Between battery and backlight circuit and flashlight driving circuit, adopt the driving of boosting of BOOST circuit.These two kinds of circuit all are to be present in the integrated circuit simultaneously, thereby cause circuit footprint bigger, and its cost is also higher simultaneously.
The utility model content
For overcoming the problem of the deficiencies in the prior art and existence, the utility model provides a kind of BUCK circuit that both can be used as to use, and also can be used as the DC-DC circuit that the BOOST circuit uses, to save circuit space and to reduce circuit cost.
The utility model is achieved through the following technical solutions: a kind of DC-DC circuit, comprise the first I/O end PORT1, the second I/O end PORT2, the first switching tube Q1, second switch pipe Q2, the first pulse input end PWM1, the second pulse input end PWM2, inductance L 1;
The emitter of the described first switching tube Q1 is connected with the second I/O end PORT2, base stage is connected with the first pulse input end PWM1, collector electrode is connected with an end of inductance L 1, the other end of inductance L 1 is connected with the first I/O end PORT1, is connected in parallel to the first diode D1 between the collector electrode of the first switching tube Q1 and the emitter; The anode of the described first diode D2 is connected with the collector electrode of the first switching tube Q1, and negative electrode is connected with the emitter of the first switching tube Q1;
The emitter of described second switch pipe Q2 is connected with the collector electrode of the first switching tube Q1, the base stage of second switch pipe Q2 is connected with the second pulse input end PWM2, the collector electrode of second switch pipe Q2 is connected with earth terminal GND, is connected in parallel to the second diode D2 between collector electrode and the emitter; The anode of the described second diode D2 is connected with the collector electrode of second switch pipe Q2, and negative electrode is connected with the emitter of second switch pipe Q2;
Be connected in series with first capacitor C 1 between described second I/O end PORT2 and the earth terminal GND; Be connected in series with second capacitor C 2 between described first I/O end PORT1 and the earth terminal GND.
When the first I/O end PORT1 as voltage input end, the second I/O end PORT2 is during as voltage output end, the first pulse input end PWM1 input pulse signal, the second pulse input end PWM2 imports so that second switch pipe Q2 is in the high level signal by operating state.At this moment, described DC-DC circuit uses as the BUCK circuit.
When the first I/O end PORT1 as voltage output end, the second I/O end PORT2 is during as voltage input end, the second pulse input end PWM2 input pulse signal, the first pulse input end PWM1 imports so that second switch pipe Q2 is in the high level signal by operating state.At this moment, described DC-DC circuit uses as the BOOST circuit.
Preferably, described first switching tube Q1 and second switch pipe Q2 are triode, and described triode is the positive-negative-positive triode.
The utility model is applied in the circuit of portable electric appts, can effectively reduce circuit footprint, also can further reduce circuit cost simultaneously.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is the circuit diagram of the utility model when using as the BUCK circuit;
Fig. 3 is the circuit diagram of the utility model when using as the BOOST circuit;
Fig. 4 adjusts circuit diagram after the view directions for Fig. 3.
Embodiment
Understanding for the ease of those skilled in the art describes in further detail the utility model below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of DC-DC circuit, comprise the first I/O end PORT1, the second I/O end PORT2, the first switching tube Q1, second switch pipe Q2, the first pulse input end PWM1, the second pulse input end PWM2, first capacitor C 1, second capacitor C, 2, the first diode D1, the second diode D2 and inductance L 1;
The emitter of the described first switching tube Q1 is connected with the second I/O end PORT2, base stage is connected with the first pulse input end PWM1, collector electrode is connected with an end of inductance L 1, the other end of inductance L 1 is connected with the first I/O end PORT1, is connected in parallel to the first diode D1 between the collector electrode of the first switching tube Q1 and the emitter; The anode of the described first diode D2 is connected with the collector electrode of the first switching tube Q1, and negative electrode is connected with the emitter of the first switching tube Q1;
The emitter of described second switch pipe Q2 is connected with the collector electrode of the first switching tube Q1, the base stage of second switch pipe Q2 is connected with the second pulse input end PWM2, the collector electrode of second switch pipe Q2 is connected with earth terminal GND, is connected in parallel to the second diode D2 between collector electrode and the emitter; The anode of the described second diode D2 is connected with the collector electrode of second switch pipe Q2, and negative electrode is connected with the emitter of second switch pipe Q2;
Be connected in series with first capacitor C 1 between described second I/O end PORT2 and the earth terminal GND; Be connected in series with second capacitor C 2 between described first I/O end PORT1 and the earth terminal GND.In the present embodiment, described first switching tube Q1 and second switch pipe Q2 are the positive-negative-positive triode.
When described DC-DC circuit need use as the BUCK circuit, the first I/O end PORT1 is as voltage input end, the second I/O end PORT2 is as voltage output end, at the first pulse input end PWM1 input pulse signal, at the second pulse input end PWM2 input high level signal, so that second switch pipe Q2 is in by operating state.At this moment, first capacitor C 1 is as the electric capacity of voltage regulation of voltage input end, and second switch pipe Q2 ends, and the first switching tube Q1 works under the pulse signal of the first pulse input end PWM1, form a BUCK circuit by Q1, D2, L1, C2, it simplifies circuit as shown in Figure 2.
When described DC-DC circuit uses as the BOOST circuit, the first I/O end PORT1 is as voltage output end, the second I/O end PORT2 is during as voltage input end, at the second pulse input end PWM2 input pulse signal, at the first pulse input end PWM1 input high level signal, so that second switch pipe Q2 is in by operating state.At this moment, second capacitor C 2 is as the electric capacity of voltage regulation of voltage input end, and the first switching tube Q1 ends, and second switch pipe Q2 works under the pulse signal of the second pulse input end PWM1, form a BOOST circuit by Q2, D1, L1, C1, it simplifies circuit as shown in Figure 3.As seen from Figure 3, this is a reverse BOOST circuit, its view directions is adjusted, and as shown in Figure 4, be a BOOST circuit as can be seen.
The foregoing description is a preferable implementation of the present utility model, is not to be to qualification of the present utility model, and under the prerequisite that does not break away from inventive concept of the present utility model, any conspicuous replacement is all within protection range of the present utility model.
Claims (5)
1. DC-DC circuit, it is characterized in that: described DC-DC circuit comprises the first I/O end (PORT1), the second I/O end (PORT2), first switching tube (Q1), second switch pipe (Q2), first pulse input end (PWM1), second pulse input end (PWM2), inductance (L1);
The emitter of described first switching tube (Q1) is connected with the second I/O end (PORT2), base stage is connected with first pulse input end (PWM1), collector electrode is connected with an end of inductance (L1), the other end of inductance (L1) is connected with the first I/O end (PORT1), is connected in parallel to first diode (D1) between the collector electrode of first switching tube (Q1) and the emitter; The anode of described first diode (D2) is connected with the collector electrode of first switching tube (Q1), and negative electrode is connected with the emitter of first switching tube (Q1);
The emitter of described second switch pipe (Q2) is connected with the collector electrode of first switching tube (Q1), the base stage of second switch pipe (Q2) is connected with second pulse input end (PWM2), the collector electrode of second switch pipe (Q2) is connected with earth terminal (GND), is connected in parallel to second diode (D2) between collector electrode and the emitter; The anode of described second diode (D2) is connected with the collector electrode of second switch pipe (Q2), and negative electrode is connected with the emitter of second switch pipe (Q2);
Be connected in series with first electric capacity (C1) between described second I/O end (PORT2) and the earth terminal (GND); Be connected in series with second electric capacity (C2) between described first I/O end (PORT1) and the earth terminal (GND).
2. DC-DC circuit according to claim 1, it is characterized in that: when the first I/O end (PORT1) as voltage input end, the second I/O end (PORT2) is during as voltage output end, first pulse input end (PWM1) input pulse signal, second pulse input end (PWM2) is imported so that second switch pipe (Q2) is in the high level signal by operating state.
3. DC-DC circuit according to claim 1, it is characterized in that: when the first I/O end (PORT1) as voltage output end, the second I/O end (PORT2) is during as voltage input end, second pulse input end (PWM2) input pulse signal, first pulse input end (PWM1) is imported so that second switch pipe (Q2) is in the high level signal by operating state.
4. according to claim 2 or 3 described DC-DC circuit, it is characterized in that: described first switching tube (Q1) is triode with second switch pipe (Q2).
5. DC-DC circuit according to claim 4 is characterized in that: described triode is the positive-negative-positive triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320101656 CN203086341U (en) | 2013-03-06 | 2013-03-06 | DC-DC (Direct Current to Direct Current) circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320101656 CN203086341U (en) | 2013-03-06 | 2013-03-06 | DC-DC (Direct Current to Direct Current) circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203086341U true CN203086341U (en) | 2013-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320101656 Expired - Lifetime CN203086341U (en) | 2013-03-06 | 2013-03-06 | DC-DC (Direct Current to Direct Current) circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203086341U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811766A (en) * | 2016-05-10 | 2016-07-27 | 清华大学 | Boost-buck DC-DC converter for fuel cell vehicle |
-
2013
- 2013-03-06 CN CN 201320101656 patent/CN203086341U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811766A (en) * | 2016-05-10 | 2016-07-27 | 清华大学 | Boost-buck DC-DC converter for fuel cell vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130724 |
|
| CX01 | Expiry of patent term |