CN203788189U - Bootstrap boost circuit - Google Patents
Bootstrap boost circuit Download PDFInfo
- Publication number
- CN203788189U CN203788189U CN201420108560.4U CN201420108560U CN203788189U CN 203788189 U CN203788189 U CN 203788189U CN 201420108560 U CN201420108560 U CN 201420108560U CN 203788189 U CN203788189 U CN 203788189U
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- 238000007600 charging Methods 0.000 claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims description 24
- 239000003990 capacitor Substances 0.000 abstract description 23
- 238000007599 discharging Methods 0.000 abstract description 6
- 230000010355 oscillation Effects 0.000 abstract 5
- 230000005669 field effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
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Abstract
The utility model discloses a bootstrap boost circuit which comprises a circuit input end, a circuit output end, an oscillation circuit, a charging and discharging circuit, an output capacitor and a switch tube. The first input end of the oscillation circuit is connected with the anode of the circuit input end, and the second input end of the oscillation circuit is connected with the cathode of the circuit input end; the first charging end of the charging and discharging circuit is connected with the anode of the circuit input end, and the second charging end of the charging and discharging circuit is connected with the output end of the oscillation circuit; the anode of the output capacitor is connected with the anode output end of the charging and discharging circuit, the cathode of the output capacitor is connected with the first end of the switch tube, and the second end of the switch tube is connected with the cathode output end of the charging and discharging circuit; the control electrode of the switch tube is connected with the output end of the oscillation circuit; and the anode of the output capacitor is connected with the anode of the circuit output end, and the cathode of the output capacitor is connected with the cathode of the circuit output end. The bootstrap boost circuit can use fewer components to realize bootstrap boosting, and when the cathode of the circuit output end is connected with the anode of the circuit input end, a voltage source whose voltage is higher than the input voltage can be provided.
Description
[technical field]
The utility model relates to power supply, relates in particular to a kind of bootstrap circuit boost.
[background technology]
Along with automobile is universal and the development of solar battery technology, require battery-powered portable set more and more, low-voltage direct-DC power convertor that market demand is a large amount of, the overcurrent protection of these converters or short-circuit protection often relied on relay or more expensive P-MOS field effect transistor is used as switching device in the past; Relay is shorter mechanical endurance; and P-MOS field effect transistor price is high, poor performance; for the sake of security; generally protection switch is placed on to direct current input anode; if use N-MOS field effect transistor that price low performance is good as switching device, the driving voltage source higher than input voltage must be provided.
[summary of the invention]
The technical problems to be solved in the utility model is to provide a kind of voltage source higher than input voltage, the confession electric drive while being applied in DC-DC power converter input anode as N-MOS field effect transistor
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is that a kind of bootstrap circuit boost, comprises circuit input end, circuit output end, oscillating circuit, charge-discharge circuit, output capacitance and switching tube; The positive pole of the first input end connection circuit input of oscillating circuit, the negative pole of the second input connection circuit input; The positive pole of the first charging end termination circuit input of charge-discharge circuit, the output of the second charging termination oscillating circuit; The positive pole of output capacitance connects the cathode output end of charge-discharge circuit, and negative pole connects the first end of switching tube, the cathode output end of the second termination charge-discharge circuit of switching tube; The control utmost point of switching tube connects the output of oscillating circuit; The positive pole of the anodal connection circuit output of output capacitance, the negative pole of the negative pole connection circuit output of output capacitance.
Above-described bootstrap circuit boost, oscillating circuit comprises bleeder circuit and amplifier oscillating circuit, the positive pole of the first end connection circuit input of bleeder circuit, the negative pole of the second termination circuit input; The first input end of amplifier oscillating circuit connects the dividing point of bleeder circuit, the second end of the second input termination bleeder circuit; The control utmost point of the output termination switching tube of amplifier oscillating circuit.
Above-described bootstrap circuit boost, amplifier oscillating circuit comprises comparator, the first resistance, the second resistance, the first electric capacity and the second electric capacity, and the first resistance is connected between the in-phase input end and output of comparator, and the first electric capacity and the first resistance also connect; The second resistance is connected between the inverting input and output of comparator, and the second electric capacity is connected on the inverting input of comparator and the second end of bleeder circuit; The control utmost point of the output termination switching tube of comparator.
Above-described bootstrap circuit boost, charge-discharge circuit comprises the first diode, the second diode, the 3rd diode and charges and discharge electric capacity; The positive pole of the anode connection circuit input of the first diode, negative electrode connects the anode of the second diode, and the negative electrode of the second diode connects the positive pole of output capacitance; The positive pole that charges and discharge electric capacity connects the negative electrode of the first diode, and negative pole connects the anode of the 3rd diode, and the negative electrode of the 3rd diode connects output end of oscillating circuit; The second termination of switching tube charges and discharge the negative pole of electric capacity.
Above-described bootstrap circuit boost, charge-discharge circuit comprises that second switch pipe, second charges and discharge electric capacity, the 4th diode and the 5th diode; The anode of the 4th diode connects the anode of the first diode, and negative electrode connects the second positive pole that charges and discharge electric capacity; The second negative pole that charges and discharge electric capacity connects the anode of the 5th diode, and the negative electrode of the 5th diode connects the negative electrode of the 3rd diode; The first termination of second switch pipe discharges and recharges the negative pole of appearance, and the second termination second charges and discharge the positive pole of electric capacity, controls the output that the utmost point connects oscillating circuit; Second termination second of switching tube charges and discharge the negative pole of electric capacity.
Above-described bootstrap circuit boost, charge-discharge circuit comprises the 3rd resistance, the anode of the first diode is by the positive pole of the 3rd resistance connection circuit input.
Above-described bootstrap circuit boost, comprises the 4th resistance, and the 4th resistance connection charges and discharge the positive pole of electric capacity and the output of oscillating circuit.
Above-described bootstrap circuit boost, switching tube and second switch pipe are metal-oxide-semiconductors, the grid of the grid of switching tube and second switch pipe connects the output of oscillating circuit; The drain electrode of switching tube connects the negative pole of output capacitance, and source electrode connects the second negative pole that charges and discharge electric capacity; The drain electrode of second switch pipe connects the negative pole that charges and discharge electric capacity, and source electrode connects the second positive pole that charges and discharge electric capacity.
The utility model bootstrap circuit boost can be used less components and parts to realize Bootstrap, when the negative pole of its circuit output end is received circuit input end anodal, just can provide the voltage source higher than input voltage.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the circuit diagram of the utility model embodiment 1 bootstrap circuit boost.
Fig. 2 is the circuit diagram of the utility model embodiment 2 bootstrap circuit boosts.
[embodiment]
The bootstrap circuit boost of the utility model embodiment 1 as shown in Figure 1, comprises circuit input end, circuit output end, oscillating circuit, charge-discharge circuit, output capacitance C101 and as the metal-oxide-semiconductor 101 of switching tube.
Oscillating circuit comprises bleeder circuit and amplifier oscillating circuit.
Bleeder circuit comprises resistance R 102 and the resistance R 105 of series connection, the anodal Vin+ of the first end connection circuit input of bleeder circuit, the negative pole Vin-of the second termination circuit input.
Amplifier oscillating circuit comprises comparator IC101A, resistance R 104, resistance R 106, capacitor C 102 and capacitor C 105.Wherein, capacitor C 105 and resistance R 106 are timing and duty cycle adjustment device, and capacitor C 102 and resistance R 104 are positive feedback element, the output output square-wave pulse of comparator IC101A.
Resistance R 104 is connected between the in-phase input end and output of comparator IC101A, and capacitor C 102 and resistance R 104 also connect.Resistance R 106 is connected between the inverting input and output of comparator IC101A, and the inverting input of comparator IC101A is by the negative pole Vin-of capacitor C 105 connection circuit inputs.The grid of the output termination metal-oxide-semiconductor 101 of comparator IC101A.The in-phase input end of comparator IC101A connects the tie point that bleeder circuit comprises resistance R 102 and resistance R 105.
Charge-discharge circuit comprises diode D101, diode D102, diode D103, resistance R 101, resistance R 103 and charges and discharge electric capacity C103.
The anode of diode D101 is by the anodal Vin+ of resistance R 101 connection circuit inputs, and negative electrode connects the anode of diode D102, and the negative electrode of diode D102 connects the positive pole of output capacitance C101.The positive pole that charges and discharge electric capacity C103 connects the negative electrode of diode D101, and negative pole connects the anode of diode D103, the negative electrode output end of oscillating circuit of diode D103.
One termination of resistance R 103 discharges and recharges the positive pole that holds C103, the output of another termination comparator IC101A.
The negative pole of output capacitance C101 connects the drain electrode of metal-oxide-semiconductor 101, and the source electrode of metal-oxide-semiconductor 101 connects the anode of diode D103.The grid of metal-oxide-semiconductor 101 connects the output of comparator IC101A.
The anodal Vout of the positive terminal connection circuit output of output capacitance C101, the negative pole VoutRTN of the negative pole connection circuit output of output capacitance C101.
Resistance R 101, diode D101, diode D103 and capacitor C 103 form charge circuit.When the square-wave pulse of comparator IC101A output is low level, charge and discharge electric capacity C103 and charge by resistance R 101, diode D101, diode D103, before the square-wave pulse of comparator IC101A output becomes high level, be charged to the voltage of the anodal Vin+ of circuit input end.
Diode D102, capacitor C 101, capacitor C 103 and metal-oxide-semiconductor Q101 form discharge loop, when the square-wave pulse of comparator IC101A output is high level, capacitor C 103 is by diode D102, metal-oxide-semiconductor Q101 to capacitor C 101 chargings, and output capacitance C101 obtains the anodal Vin+ voltage of circuit input end.When circuit output end Vout RTN receives the anodal Vin+ of circuit input end, output end vo ut can obtain doubling the voltage of the anodal Vin+ twice of Vout circuit input end, when circuit output end Vout RTN receives its supply-reference point, can obtain the voltage higher than the anodal Vin+ of circuit input end.
The bootstrap circuit boost of the utility model embodiment 2 is voltage-multiplying circuit, as shown in Figure 2, compares with embodiment 1, has increased by second and has charged and discharged electric capacity C104, diode 104, diode 105 and the second metal-oxide-semiconductor 102; Second to charge and discharge the charging circuit that electric capacity C104, diode 104 and diode 105 form in parallel with the charging circuit of capacitor C 103, diode 101, diode 103 formations.
As shown in Figure 2, the anode of diode D104 connects the anode of diode D101, and negative electrode connects the positive pole that charges and discharge electric capacity C104.The negative pole that charges and discharge electric capacity C104 connects the anode of diode D105, and the negative electrode of diode D105 connects the negative electrode of diode D103.
The drain electrode of metal-oxide-semiconductor 102 connects the negative pole that charges and discharge electric capacity C103, and source connects the positive pole that charges and discharge electric capacity C104, and grid connects the output of comparator IC101A.The source electrode of metal-oxide-semiconductor 101 connects the negative pole that charges and discharge electric capacity C104.
Metal-oxide-semiconductor 101 and metal-oxide-semiconductor 102 are metal-oxide-semiconductors, and the grid of the grid of metal-oxide-semiconductor 101 and metal-oxide-semiconductor 102 connects the output of oscillating circuit.The drain electrode of metal-oxide-semiconductor 101 connects the negative pole of output capacitance C101, and source electrode connects the negative pole that charges and discharge electric capacity C104.The drain electrode of metal-oxide-semiconductor 102 connects the negative pole that charges and discharge electric capacity C103, and source electrode connects the positive pole that charges and discharge electric capacity C104.
When the square-wave pulse of comparator IC101A output is low level, charging and discharging electric capacity C103 charges by resistance R 101, diode D101, diode D103, charge and discharge electric capacity C104 and charge by resistance R 101, diode D104, diode D105, before the square-wave pulse of comparator IC101A output becomes high level, be all filled to the voltage of the anodal Vin+ of circuit input end.
Diode D102, capacitor C 101, capacitor C 103, capacitor C 104, metal-oxide-semiconductor Q101 and metal-oxide-semiconductor Q102 form discharge loop, when the square-wave pulse of comparator IC101A output is high level, capacitor C 103 and C104 by resistance R 103 by the level of comparator IC101A output further draw high, driven MOS pipe Q101 and metal-oxide-semiconductor Q102 open-minded, capacitor C 103 and C104 charge to capacitor C 101 by diode D102, metal-oxide-semiconductor Q101 and metal-oxide-semiconductor Q102, and output capacitance C101 obtains doubling the voltage of the anodal Vin+ of circuit input end.
Claims (8)
1. a bootstrap circuit boost, comprises circuit input end and circuit output end, it is characterized in that, comprises oscillating circuit, charge-discharge circuit, output capacitance and switching tube; The positive pole of the first input end connection circuit input of oscillating circuit, the negative pole of the second input connection circuit input; The positive pole of the first charging end termination circuit input of charge-discharge circuit, the output of the second charging termination oscillating circuit; The positive pole of output capacitance connects the cathode output end of charge-discharge circuit, and negative pole connects the first end of switching tube, the cathode output end of the second termination charge-discharge circuit of switching tube; The control utmost point of switching tube connects the output of oscillating circuit; The positive pole of the anodal connection circuit output of output capacitance, the negative pole of the negative pole connection circuit output of output capacitance.
2. bootstrap circuit boost according to claim 1, is characterized in that, oscillating circuit comprises bleeder circuit and amplifier oscillating circuit, the positive pole of the first end connection circuit input of bleeder circuit, the negative pole of the second termination circuit input; The first input end of amplifier oscillating circuit connects the dividing point of bleeder circuit, the second end of the second input termination bleeder circuit; The control utmost point of the output termination switching tube of amplifier oscillating circuit.
3. bootstrap circuit boost according to claim 2, it is characterized in that, amplifier oscillating circuit comprises comparator, the first resistance, the second resistance, the first electric capacity and the second electric capacity, and the first resistance is connected between the in-phase input end and output of comparator, and the first electric capacity and the first resistance also connect; The second resistance is connected between the inverting input and output of comparator, and the second electric capacity is connected on the inverting input of comparator and the second end of bleeder circuit; The control utmost point of the output termination switching tube of comparator.
4. bootstrap circuit boost according to claim 1, is characterized in that, charge-discharge circuit comprises the first diode, the second diode, the 3rd diode and charges and discharge electric capacity; The positive pole of the anode connection circuit input of the first diode, negative electrode connects the anode of the second diode, and the negative electrode of the second diode connects the positive pole of output capacitance; The positive pole that charges and discharge electric capacity connects the negative electrode of the first diode, and negative pole connects the anode of the 3rd diode, and the negative electrode of the 3rd diode connects output end of oscillating circuit; The second termination of switching tube charges and discharge the negative pole of electric capacity.
5. bootstrap circuit boost according to claim 4, is characterized in that, charge-discharge circuit comprises that second switch pipe, second charges and discharge electric capacity, the 4th diode and the 5th diode; The anode of the 4th diode connects the anode of the first diode, and negative electrode connects the second positive pole that charges and discharge electric capacity; The second negative pole that charges and discharge electric capacity connects the anode of the 5th diode, and the negative electrode of the 5th diode connects the negative electrode of the 3rd diode; The first termination of second switch pipe discharges and recharges the negative pole of appearance, and the second termination second charges and discharge the positive pole of electric capacity, controls the output that the utmost point connects oscillating circuit; Second termination second of switching tube charges and discharge the negative pole of electric capacity.
6. bootstrap circuit boost according to claim 4, is characterized in that, charge-discharge circuit comprises the 3rd resistance, and the anode of the first diode is by the positive pole of the 3rd resistance connection circuit input.
7. bootstrap circuit boost according to claim 4, is characterized in that, comprises the 4th resistance, and the 4th resistance connection charges and discharge the positive pole of electric capacity and the output of oscillating circuit.
8. bootstrap circuit boost according to claim 5, is characterized in that, switching tube and second switch pipe are metal-oxide-semiconductors, and the grid of the grid of switching tube and second switch pipe connects the output of oscillating circuit; The drain electrode of switching tube connects the negative pole of output capacitance, and source electrode connects the second negative pole that charges and discharge electric capacity; The drain electrode of second switch pipe connects the negative pole that charges and discharge electric capacity, and source electrode connects the second positive pole that charges and discharge electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420108560.4U CN203788189U (en) | 2014-03-11 | 2014-03-11 | Bootstrap boost circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420108560.4U CN203788189U (en) | 2014-03-11 | 2014-03-11 | Bootstrap boost circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203788189U true CN203788189U (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420108560.4U Expired - Fee Related CN203788189U (en) | 2014-03-11 | 2014-03-11 | Bootstrap boost circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203788189U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680746A (en) * | 2015-01-30 | 2015-06-03 | 深圳市航盛电子股份有限公司 | Bootstrapping circuit for alarming of vehicle-mounted information terminal |
| WO2017101061A1 (en) * | 2015-12-17 | 2017-06-22 | 华为技术有限公司 | Bootstrap driving circuit and driving method thereof |
| CN112039510A (en) * | 2020-07-30 | 2020-12-04 | 广东美的白色家电技术创新中心有限公司 | Bootstrap circuit for high-voltage integrated chip, intelligent power module and electrical equipment |
| WO2021217455A1 (en) * | 2020-04-28 | 2021-11-04 | 武文静 | Voltage bootstrap chip, weak light collection circuit and device, and control method therefor |
| WO2021217454A1 (en) * | 2020-04-28 | 2021-11-04 | 武文静 | Voltage bootstrap chip, low-light collection circuit and device, and control methods therefor |
-
2014
- 2014-03-11 CN CN201420108560.4U patent/CN203788189U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680746A (en) * | 2015-01-30 | 2015-06-03 | 深圳市航盛电子股份有限公司 | Bootstrapping circuit for alarming of vehicle-mounted information terminal |
| WO2017101061A1 (en) * | 2015-12-17 | 2017-06-22 | 华为技术有限公司 | Bootstrap driving circuit and driving method thereof |
| WO2021217455A1 (en) * | 2020-04-28 | 2021-11-04 | 武文静 | Voltage bootstrap chip, weak light collection circuit and device, and control method therefor |
| WO2021217454A1 (en) * | 2020-04-28 | 2021-11-04 | 武文静 | Voltage bootstrap chip, low-light collection circuit and device, and control methods therefor |
| CN112039510A (en) * | 2020-07-30 | 2020-12-04 | 广东美的白色家电技术创新中心有限公司 | Bootstrap circuit for high-voltage integrated chip, intelligent power module and electrical equipment |
| CN112039510B (en) * | 2020-07-30 | 2024-05-03 | 广东美的白色家电技术创新中心有限公司 | Bootstrap circuit for high-voltage integrated chip, intelligent power module and electrical equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160601 Address after: 412000 No. 1728, Taishan Road, Tianyuan District, Hunan, Zhuzhou Patentee after: ZHUZHOU MEGMEET ELECTRIC CO.,LTD. Address before: 518000 Shenzhen science and technology zone, Nanshan District Province, North District, road, No. 13, Thunis science and Technology Park, layer 5 Patentee before: SHENZHEN MEGMEET ELECTRICAL Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 |