CN202586764U - H bridge output circuit driven by motor - Google Patents
H bridge output circuit driven by motor Download PDFInfo
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- CN202586764U CN202586764U CN 201220080940 CN201220080940U CN202586764U CN 202586764 U CN202586764 U CN 202586764U CN 201220080940 CN201220080940 CN 201220080940 CN 201220080940 U CN201220080940 U CN 201220080940U CN 202586764 U CN202586764 U CN 202586764U
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- power tube
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Abstract
The utility model discloses an H bridge output circuit driven by a motor, and is characterized in comprising a first power tube, a second power tube, a third power tube, and a fourth power tube of an input stage; a first driving tube which is connected with the first power tube to drive the first power tube; a second driving tube which is connected with the second power tube to drive the second power tube; an external power diode whose anode is connected with the first and second driving tubes and whose cathode is connected with the first and second power tubes; and the first and second driving tubes are directly connected with a power source. The H bridge output circuit driven by a motor in the utility model reduces the saturation voltage drop of an H bridge upper output tube, thereby reducing power consumption of a chip, improving the current output capability of the chip in the premise that no additional encapsulation cost is needed, and reducing power consumption of the whole system.
Description
Technical field
The utility model relates to a kind of H bridge output circuit of motor driven.
Background technology
As shown in Figure 1, be the motor driven H bridge output circuit of prior art.The H bridge of output stage is made up of four NPN power tubes 101,102,103,104; PNP pipe 109 drives described NPN power tube 101 and constitutes darlington structure as one tunnel high-side driver; PNP pipe 110 drives described NPN power tube 104 and constitutes Darlington transistor as other one tunnel high-side driver, and NPN power tube 102,103 drives as the two-way low side respectively.The electric current of coil 115 can be from left to right, also can be from right to left, and promptly electric current can commutate.When motor ran well, the surrounding magnetic field cycle changed.Hall element by current source 111 biasings is used for detecting changes of magnetic field on every side; Hall element 112 converts magnetic signal into the signal of telecommunication; Deliver to prime driver module 114 after handling by hysteresis comparator again; The current direction of decision coil, so determined motor driven H bridge output four NPN pipes 101,102,103,104 conducting or end.When supposing that H+ is high than H-, 101,103 conductings, 102,104 end, then current path be power supply through external power diode 116, cross manage 101 on the H bridge, coil 115, H bridge down pipe 103 to ground.The output of H bridge will promote revolution; Hall element will detect changes of magnetic field, and the relative H-of H+ becomes low, handle through comparator 113 and give prime driver module 114; The control coil commutation; 101,103 will simultaneously or successively be turned off, diode 106,108 will play the effect of afterflow, reduce the overshoot voltage at coil 115 two ends.Then, power tube 102,104 will be opened, and electric current is flowed through diode 116, H bridge output upper tube 104, coil 115, H bridge output lower tube 102 to ground from power supply.Motor is rotated further; Hall element detects changes of magnetic field, and the relative H-of H+ becomes height once more, handles through comparator 113 and gives prime driver module 114; The control coil commutation; 102,104 will simultaneously or successively be turned off, diode 105,107 will play the effect of afterflow, reduce the overshoot voltage at coil 115 two ends.Then, after a bit of time, 101,103 are opened.Circulation in this order.
In the prior art, the saturation voltage drop that the saturation voltage drop of H bridge output upper tube drives PNP pipe 109,110 by prime adds manages 101,104 emitter junction pressure drop, and output current is measured under 200mA, generally about 0.9V.And under the same terms, the saturation voltage drop of following pipe 102,103 is about 0.2V.If improve the driving force of H bridge output, increase output current, with further increasing the saturation voltage drop of going up pipe, increased the temperature rise of chip, greatly reduced chip reliability.
See Fig. 2, this figure is the Hall output and chip output (coil voltage) waveform of prior art.What VD represented is the forward conduction voltage of external diode; What Vsat (p) represented is the saturation voltage drop of the PNP pipe 109,110 of Darlington; What Vsat (n) represented is the saturation voltage drop of pipe 102,103 under the power tube, manages 101,104 emitter junction forward voltage drop on the power tube that Vbe representes.
In order to increase the fan-out capability of above-mentioned H bridge, significantly do not increase the temperature rise of chip simultaneously, must adopt encapsulation with stronger heat-sinking capability, greatly increased packaging cost.
The utility model content
The utility model provides a kind of H bridge output circuit of motor driven in order to overcome the deficiency of prior art, can reduce the chip internal power consumed.When effectively increasing the output current ability of chip, need not increase packaging cost.
To achieve these goals, the utility model adopts following technical scheme: a kind of H bridge output circuit of motor driven is characterized in that: it comprises first power tube, second power tube, the 3rd power tube, the 4th power tube of output stage; One first driving tube is connected to drive first power tube with first power tube; One second driving tube is connected to drive second power tube with second power tube; One external power diode, its anode is connected with first, second driving tube, and negative electrode is connected with first, second power tube; Said first driving tube, second driving tube directly are connected with power supply.
Further, said four power tubes are N type metal-oxide-semiconductor.
Further, said first, second driving tube is a P type metal-oxide-semiconductor.
Having the following advantages of the utility model: through the saturation voltage drop of reduction H bridge output upper tube, thereby the power consumption of reduction chip need not to increase under the prerequisite of packaging cost, improves the electric current fan-out capability of chip; Reduce the power consumption of whole system.
Description of drawings
Fig. 1 is the motor driven H bridge output circuit of prior art.
Fig. 2 is the Hall output and chip output waveform figure of prior art.
Fig. 3 is the circuit block diagram of a kind of embodiment of the utility model.
Fig. 4 is output of the utility model Hall and chip output waveform figure.
Embodiment
In order to make those skilled in the art person better understand the utility model scheme, will combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, complete description.
Like Fig. 3, shown in 4; A kind of bridge drive circuit that is used to drive capacitive load; The H bridge of its output stage is by four N type metal-oxide-semiconductors: first power tube 301, second power tube 302, the 3rd power tube 303, the 4th power tube 304 are formed; First driving tube is a P type metal-oxide-semiconductor 309, constitutes darlington structure as one tunnel high-side driver with driving N PN power tube 301, and second driving tube is a P type metal-oxide-semiconductor 310; Constitute Darlington transistor as other one tunnel high-side driver with driving N PN power tube 304, NPN power tube 302,303 drives as the two-way low side respectively.The electric current of coil 315 can be from left to right, also can be from right to left, and promptly electric current can commutate.When motor ran well, the surrounding magnetic field cycle changed.Hall element by current source 311 biasings is used for detecting changes of magnetic field on every side; Hall element 312 converts magnetic signal into the signal of telecommunication; Deliver to prime driver module 314 after handling by hysteresis loop comparator 313 again; The current direction of decision coil, so determined motor driven H bridge output four NPN pipes 301,302,303,304 conducting or end.When supposing that H+ is high than H-, 301,303 conductings, 302,304 end, then current path be power supply through external power diode 316, cross manage 301 on the H bridge, coil 315, H bridge down pipe 303 to ground.The output of H bridge will promote revolution; Hall element will detect changes of magnetic field, and the relative H-of H+ becomes low, handle through comparator 313 and give prime driver module 314; The control coil commutation; 301,303 will simultaneously or successively be turned off, diode 306,308 will play the effect of afterflow, reduce the overshoot voltage at coil 315 two ends.Then, power tube 302,304 will be opened, and electric current is flowed through diode 316, H bridge output upper tube 304, coil 315, H bridge output lower tube 302 to ground from power supply.Motor is rotated further; Hall element detects changes of magnetic field, and the relative H-of H+ becomes height once more, handles through comparator 313 and gives prime driver module 314; The control coil commutation; 302,304 will simultaneously or successively be turned off, diode 305,307 will play the effect of afterflow, reduce the overshoot voltage at coil 315 two ends.Then, after a bit of time, 301,303 are opened.Circulation in this order.
In the present embodiment; The saturation voltage drop of H bridge output upper tube is that the saturation voltage drop of prime driving PNP pipe 309 or 310 adds that the emitter junction pressure drop of NPN pipe 301 or 304 deducts the forward conduction voltage of external power diode again, and its end value will be suitable with the saturation voltage drop of managing 302,303 down.Suppose that the forward conduction voltage of external power diode when 500mA is 0.8V, then the power consumption that reduces of chip is approximately 0.4W, near approximately chip total power consumption half the.
See Fig. 4, this figure is the Hall output and chip output (coil voltage) waveform of prior art.What VD represented is the forward conduction voltage of external diode; What Vsat (p) represented is the saturation voltage drop of the PNP pipe 309,310 of Darlington; What Vsat (n) represented is the saturation voltage drop of pipe 302,303 under the power tube, manages 301,304 emitter junction forward voltage drop on the power tube that Vbe representes.
In sum, the present invention can greatly reduce chip power-consumption, reduces the chip temperature rise, improves stability and reliability.
The above only is the preferred embodiment of the utility model, is not to any formal restriction of present embodiment.Anyly be familiar with those skilled in the art; Do not breaking away under the utility model technical scheme scope situation; Can utilize the method and the technology contents of above-mentioned announcement that the utility model is made many possible changes and modification; Perhaps be revised as the equivalent embodiment of equivalent variations, all still belong in the scope of the utility model protection.
Claims (3)
1. the H bridge output circuit of a motor driven, it is characterized in that: it comprises first power tube, second power tube, the 3rd power tube, the 4th power tube of output stage; One first driving tube is connected to drive first power tube with first power tube; One second driving tube is connected to drive second power tube with second power tube; One external power diode, its anode is connected with first, second driving tube, and negative electrode is connected with first, second power tube; Said first driving tube, second driving tube directly are connected with power supply.
2. the H bridge output circuit of a kind of motor driven according to claim 1, it is characterized in that: said four power tubes are N type metal-oxide-semiconductor.
3. the H bridge output circuit of a kind of motor driven according to claim 2, it is characterized in that: said first, second driving tube is a P type metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220080940 CN202586764U (en) | 2012-03-05 | 2012-03-05 | H bridge output circuit driven by motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220080940 CN202586764U (en) | 2012-03-05 | 2012-03-05 | H bridge output circuit driven by motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202586764U true CN202586764U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220080940 Expired - Fee Related CN202586764U (en) | 2012-03-05 | 2012-03-05 | H bridge output circuit driven by motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN202586764U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580464A (en) * | 2013-10-13 | 2014-02-12 | 成都威特电喷有限责任公司 | Self-protection H bridge driving circuit |
| CN103825508A (en) * | 2014-03-20 | 2014-05-28 | 绍兴光大芯业微电子有限公司 | Circuit structure and method for realizing low-noise and high-efficiency motor driven soft commutation control |
| CN107976629A (en) * | 2017-12-25 | 2018-05-01 | 深圳市巴丁微电子有限公司 | A kind of detection method and device of current of electric flow direction |
| CN113314518A (en) * | 2020-02-26 | 2021-08-27 | 圣邦微电子（北京）股份有限公司 | Layout of motor H-bridge drive circuit chip |
-
2012
- 2012-03-05 CN CN 201220080940 patent/CN202586764U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580464A (en) * | 2013-10-13 | 2014-02-12 | 成都威特电喷有限责任公司 | Self-protection H bridge driving circuit |
| CN103580464B (en) * | 2013-10-13 | 2015-10-28 | 成都威特电喷有限责任公司 | Self-protection H bridge drive circuit |
| CN103825508A (en) * | 2014-03-20 | 2014-05-28 | 绍兴光大芯业微电子有限公司 | Circuit structure and method for realizing low-noise and high-efficiency motor driven soft commutation control |
| CN103825508B (en) * | 2014-03-20 | 2016-06-08 | 绍兴光大芯业微电子有限公司 | Realize low-noise high efficiency electric motor to drive and soft change facies-controlled circuit structure and method |
| CN107976629A (en) * | 2017-12-25 | 2018-05-01 | 深圳市巴丁微电子有限公司 | A kind of detection method and device of current of electric flow direction |
| CN113314518A (en) * | 2020-02-26 | 2021-08-27 | 圣邦微电子（北京）股份有限公司 | Layout of motor H-bridge drive circuit chip |
| CN113314518B (en) * | 2020-02-26 | 2023-10-13 | 圣邦微电子（北京）股份有限公司 | Motor H bridge driving circuit chip layout |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20121205 Termination date: 20160305 |