CN101621250B - Detecting device for output current of voltage regulator and method - Google Patents
Detecting device for output current of voltage regulator and method Download PDFInfo
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- CN101621250B CN101621250B CN 200810127995 CN200810127995A CN101621250B CN 101621250 B CN101621250 B CN 101621250B CN 200810127995 CN200810127995 CN 200810127995 CN 200810127995 A CN200810127995 A CN 200810127995A CN 101621250 B CN101621250 B CN 101621250B
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Abstract
The invention discloses a detecting device for output current of a voltage regulator. The voltage regulator comprises an upper bridge assembly, a lower bride assembly and an electrical inductance which are jointly coupled to a switching joint, and the other ends of the upper bridge assembly, the lower bride assembly and the electrical inductance are respectively coupled with an input end, a grounding electric potential and an output end; the voltage regulator also comprises a controller at least controlling the movement of either the upper bridge assembly or the lower bride assembly so as to generate output voltage at the output end. The detecting device for output current comprises an upper bridge current sensing circuit, a lower bridge current sensing circuit and a setting resistance; the detecting device of output current is characterized in that the upper bridge current sensing circuit senses the current of an upper bridge assembly to generate a first current; the lower bridge current sensing circuit senses the current of an lower bridge assembly to generate a second current; a totalling circuit adds the first current and the second current to generate a summation current; thesetting resistance detects the change of the summation current, and resistance change on the setting resistance is provided for the controller to carry out feedback control.
Description
Technical field
The present invention relates to a kind of voltage regulator, specifically, is a kind of detecting device for output current and method that is applied to the voltage regulator of charger.
Background technology
Known when providing a modulated electric current with voltage regulator, charger for example, output electric current measure mode commonly used is to detect resistance with one to connect with the inductance of voltage regulator, please refer to Fig. 1, Fig. 1 is the schematic diagram of known voltage transducer.As shown in the figure, the output current Io of voltage regulator flows through and detects resistance R sense, the U.S. No. 6369561 patent, LTC4001 or SMB135 for example, the change in voltage that detects on the resistance R sense is relevant with output current Io, and and fixedly has 1: 1 proportionate relationship between described output current Io, the change in voltage that detects on the resistance R sense is done back coupling control through the error amplifier 10 differential controllers 12 that are input to, with control driver 14 power switched transistors.
Because known detection mode is the charge path at voltage regulator to be arranged and detects resistance R sense, detect resistance R sense to the loss of power output in order to reduce, detecting resistance R sense must be the precision resistance of low resistance, but low resistance makes the change in voltage that can detect little, and to noise-sensitive, be subject to noise jamming.
Therefore the detecting device for output current of known voltage regulator exists above-mentioned all inconvenience and problem.
Summary of the invention
Purpose of the present invention is to propose a kind of detecting device for output current of voltage regulator.
Another object of the present invention is to propose a kind of method for detecting output current of voltage regulator.
Another purpose of the present invention is to propose a kind of voltage regulator of tool output electric current measure function.
For achieving the above object, technical solution of the present invention is:
A kind of detecting device for output current of voltage regulator, described voltage regulator comprises axle assemble on, once axle assemble and an inductance, described upper axle assemble, lower axle assemble and inductance three jointly are coupled to one and switch node, and described upper axle assemble, lower axle assemble and inductance three's the other end couples with an input, an earthing potential and an output respectively; Described voltage regulator also comprises a controller, and the action of one of the described controller described at least upper bridge of control and described lower axle assemble is to produce output voltage at described output; Described detecting device for output current comprises bridge current sensing circuit on, bridge current sensing circuit once, and one adds way circuit and sets resistance, wherein,
The electric current of the described upper axle assemble of described upper bridge current sensing circuit sensing is to produce one first electric current;
The electric current of the described lower axle assemble of described lower bridge current sensing circuit sensing is to produce one second electric current;
The described way circuit that adds adds up described the first and second electric currents to produce a summed current;
The variation of the described summed current of described setting resistance detection, and the ohmically change in voltage of described setting offers described controller and does and feedback control.
The detecting device for output current of voltage regulator of the present invention can also be further achieved by the following technical measures.
Aforesaid detecting device for output current, the over current protection protection mechanism that wherein said upper bridge current sensing circuit and described lower bridge current sensing circuit are described voltage regulators or the part of zero current protection mechanism.
Aforesaid detecting device for output current, an end of wherein said setting resistance connects the described way circuit that adds, other end ground connection.
Aforesaid detecting device for output current, wherein said upper and lower axle assemble is all transistor.
Aforesaid detecting device for output current, wherein said upper axle assemble is transistor, lower axle assemble is diode.
Aforesaid detecting device for output current, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described output and the described switching node.
Aforesaid detecting device for output current, wherein said upper axle assemble is coupled between described output and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described input and the described switching node.
Aforesaid detecting device for output current, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described output and the described switching node, and described inductance is coupled between described earthing potential and the described switching node.
A kind of method for detecting output current of voltage regulator, described voltage regulator comprises axle assemble on, once axle assemble and an inductance, described upper axle assemble, lower axle assemble and inductance three jointly are coupled to one and switch node, and described upper axle assemble, lower axle assemble and inductance three's the other end couples with an input, an earthing potential and an output respectively; Described voltage regulator also comprises a controller, and the action of one of the described controller described at least upper bridge of control and described lower axle assemble to produce output voltage at described output, is characterized in that described method for detecting output current comprises the following steps:
First step: the electric current of the described upper axle assemble of sensing is to produce one first electric current;
Second step: the electric current of the described lower axle assemble of sensing is to produce one second electric current;
Third step: add up described first and second electric current, produce a sum total electric current;
The 4th step: described sum total electric current is offered one set resistance;
The 5th step: the ohmically change in voltage of described setting is offered described controller do back coupling control.
The method for detecting output current of voltage regulator of the present invention can also be further achieved by the following technical measures.
Aforesaid method for detecting output current, wherein said upper and lower axle assemble is all transistor.
Aforesaid method for detecting output current, wherein said upper axle assemble is transistor, lower axle assemble is diode.
Aforesaid method for detecting output current, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described output and the described switching node.
Aforesaid method for detecting output current, wherein said upper axle assemble is coupled between described output and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described input and the described switching node.
Aforesaid method for detecting output current, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described output and the described switching node, and described inductance is coupled between described earthing potential and the described switching node.
A kind of voltage regulator comprises axle assemble on, axle assemble once, and an inductance, a controller, bridge current sensing circuit on, bridge current sensing circuit once, one adds way circuit and sets resistance, wherein,
Described upper axle assemble, described lower axle assemble and described inductance three jointly are coupled to one and switch node, and described upper axle assemble, and described lower axle assemble and described inductance three's the other end couples with an input, an earthing potential and an output respectively;
The start of one of the described controller described at least upper axle assemble of control and described lower axle assemble is to produce output voltage at described output;
The electric current of the described upper axle assemble of described upper bridge current sensing circuit sensing is to produce one first electric current;
The electric current of the described lower axle assemble of described lower bridge current sensing circuit sensing is to produce one second electric current;
Described described first and second electric current of way circuit totalling that adds produces a summed current;
The variation of the described summed current of described setting resistance detection, and the ohmically change in voltage of described setting offers described controller and does and feedback control.
Voltage regulator of the present invention can also be further achieved by the following technical measures.
Aforesaid voltage regulator, the over current protection protection mechanism that wherein said upper bridge current sensing circuit and described lower bridge current sensing circuit are described voltage regulators or the part of zero current protection mechanism.
Aforesaid voltage regulator, an end of wherein said setting resistance connects the described way circuit that adds, other end ground connection.
Aforesaid voltage regulator, wherein said upper and lower axle assemble is all transistor.
Aforesaid voltage regulator, wherein said upper axle assemble is transistor, lower axle assemble is diode.
Aforesaid voltage regulator, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described output and the described switching node.
Aforesaid voltage regulator, wherein said upper axle assemble is coupled between described output and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described input and the described switching node.
Aforesaid voltage regulator, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described output and the described switching node, and described inductance is coupled between described earthing potential and the described switching node.
A kind of detecting device for output current of voltage regulator, described voltage regulator comprises axle assemble on, axle assemble once, one inductance, described upper axle assemble, described lower axle assemble and described inductance three jointly are coupled to one and switch node, and described upper axle assemble, described lower axle assemble and described inductance three's the other end couples with an input, an earthing potential and an output respectively, described voltage regulator also comprises a controller, and described controller is controlled the switching of described upper bridge and described lower axle assemble to produce output voltage at described output; Described detecting device for output current comprises a sensing circuit, and an artificial circuit and is set resistance, wherein,
The electric current of the described upper axle assemble of described sensing circuit senses is to produce a current sensor;
Described artificial circuit produces a summed current according to described current sensor simulation;
The variation of the described summed current of described setting resistance detection, and the ohmically change in voltage of described setting offers described controller and does and feedback control.
The detecting device for output current of voltage regulator of the present invention can also be further achieved by the following technical measures.
Aforesaid detecting device for output current, the over current protection protection mechanism that wherein said upper bridge current sensing circuit and described lower bridge current sensing circuit are described voltage regulators or the part of zero current protection mechanism.
Aforesaid detecting device for output current, an end of wherein said setting resistance connects described artificial circuit, other end ground connection.
Aforesaid detecting device for output current, wherein said upper and lower axle assemble is all transistor.
Aforesaid detecting device for output current, wherein said upper axle assemble is transistor, lower axle assemble is diode.
Aforesaid detecting device for output current, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described output and the described switching node.
Aforesaid detecting device for output current, wherein said upper axle assemble is coupled between described output and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described input and the described switching node.
Aforesaid detecting device for output current, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described output and the described switching node, and described inductance is coupled between described earthing potential and the described switching node.
A kind of method for detecting output current of voltage regulator, described voltage regulator comprises axle assemble on, axle assemble once, one inductance, described upper axle assemble, described lower axle assemble and described inductance three jointly are coupled to one and switch node, and described upper axle assemble, described lower axle assemble and described inductance three's the other end respectively with an input, one earthing potential and an output couple, described voltage regulator also comprises a controller, the switching of the described upper axle assemble of described control and described lower axle assemble is characterized in that to produce output voltage at described output described method for detecting output current comprises the following steps:
First step: the electric current of the described upper axle assemble of sensing is to produce a current sensor;
Second step: produce a sum total electric current according to described current sensor simulation;
Third step: described sum total electric current is offered one set resistance;
The 4th step: the ohmically change in voltage of described setting is offered described controller do back coupling control.
The method for detecting output current of voltage regulator of the present invention can also be further achieved by the following technical measures.
Aforesaid method for detecting output current, wherein said upper and lower axle assemble is all transistor.
Aforesaid method for detecting output current, wherein said upper axle assemble is transistor, lower axle assemble is diode.
Aforesaid method for detecting output current, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described output and the described switching node.
Aforesaid method for detecting output current, wherein said upper axle assemble is coupled between described output and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described input and the described switching node.
Aforesaid method for detecting output current, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described output and the described switching node, and described inductance is coupled between described earthing potential and the described switching node.
A kind of voltage regulator comprises axle assemble on, axle assemble once, and an inductance, a controller, a sensing circuit, an artificial circuit and is set resistance, wherein,
Described upper axle assemble, described lower axle assemble and described inductance three jointly are coupled to one and switch node, and described upper axle assemble, described lower axle assemble and described inductance three's the other end couples with an input, an earthing potential and an output respectively;
Described controller is controlled the switching of described upper axle assemble and described lower axle assemble to produce output voltage at described output;
The electric current of the described upper axle assemble of described sensing circuit senses is to produce a current sensor;
Described artificial circuit produces a summed current according to described current sensor simulation;
The variation of the described summed current of described setting resistance detection, and the ohmically change in voltage of described setting offers described controller and does and feedback control.
Voltage regulator of the present invention can also be further achieved by the following technical measures.
Aforesaid voltage regulator, wherein said sensing circuit are the over current protection protection mechanism of described voltage regulator or the part of zero current detection mechanism.
Aforesaid voltage regulator, an end of wherein said setting resistance connects described artificial circuit, other end ground connection.
Aforesaid voltage regulator, wherein said upper and lower axle assemble is all transistor.
Aforesaid voltage regulator, wherein said upper axle assemble is transistor, lower axle assemble is diode.
Aforesaid voltage regulator, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described output and the described switching node.
Aforesaid voltage regulator, wherein said upper axle assemble is coupled between described output and the described switching node, described lower axle assemble is coupled between described earthing potential and the described switching node, and described inductance is coupled between described input and the described switching node.
Aforesaid voltage regulator, wherein said upper axle assemble is coupled between described input and the described switching node, described lower axle assemble is coupled between described output and the described switching node, and described inductance is coupled between described earthing potential and the described switching node.
After adopting technique scheme, the detecting device for output current of voltage regulator of the present invention has the following advantages:
1. avoid using precision resistance, reduce cost of manufacture.
2. be difficult for by noise jamming.
Description of drawings
Fig. 1 is the schematic diagram of known voltage transducer;
Fig. 2 is the schematic diagram of first embodiment of the invention;
Fig. 3 is the schematic diagram that adds way circuit of Fig. 2;
Fig. 4 is the schematic diagram of second embodiment of the invention;
Fig. 5 is the schematic diagram of third embodiment of the invention;
Fig. 6 is the variation schematic diagram of the embodiment of Fig. 5.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof the present invention is illustrated further.
Now see also Fig. 2, Fig. 2 is the schematic diagram of first embodiment of the invention.As shown in the figure, described upper bridge transistor 26 is connected between input voltage Vi and the switching node SW, described lower bridge transistor 28 is connected between switching node SW and the earthing potential GND, described inductance connects switching node SW, upper bridge transistor 26 and lower bridge transistor 28 are switched by driver 30 control, produce flow through inductance and produce output voltage V o at output of output current Io.The electric current of bridge transistor 26 and generation current I1 according to this on described upper bridge testing circuit 20 sensings, the electric current of bridge transistor 28 is with generation current I2 under lower bridge testing circuit 22 sensings, and electric current I 1 and electric current I 2 add the General Logistics Department through adding way circuit 24, offer to set resistance R set.Proportionate relationship between the described electric current I 1 in the present embodiment and I2 and output current Io no longer is fixed as 1: 1, and the ratio of bridge electric current can also adjust up and down, for example adjust the up and down proportionate relationship of bridge electric current with K1 and K2, adding General Logistics Department's electric current of setting resistance R set of flowing through represents with Io/K3, K1 and K2 can comply with actual demand adjustment, to reach the purpose of eliminating skew (offset) or postponing (delay).Change in voltage on the comparator 34 detection node A is compared to offer controller 32 and is done back coupling control with reference voltage Vref.Because set resistance R set not on the charge path of voltage regulator, the resistance of setting resistance R set can improve, and makes the change in voltage of node A more obvious, therefore can avoid using precision resistance, reduce cost, and more difficult by noise jamming.
When being applied to charger, voltage regulator can be provided with an overcurrent protection (over current protect; OCP) mechanism; or zero current detection mechanism; electric current on the supervision power transistor is to provide protection when output current is too high or too low; the present invention utilizes these basic testing mechanisms as upper bridge testing circuit 20 and lower bridge testing circuit 22, monitors that according to this back coupling control is done in the variation of output current Io.
See also Fig. 3, Fig. 3 is the schematic diagram that adds way circuit of Fig. 2 again.As shown in the figure, electric current I 1 (Psense output) waveform slope that described upper bridge testing circuit 20 produces is Vi/L, electric current I 2 (Nsense output) waveform slope that described lower bridge testing circuit 22 produces is (Vo-Vi)/L, add the electric current I o/K shown in assembly Fig. 3 below through adding way circuit 24, flow through and set resistance R set and produce a voltage at node A.
Now see also Fig. 4, Fig. 4 is the schematic diagram of second embodiment of the invention, is in asynchronous buck electric pressure converter current sensing means of the present invention to be set.Present embodiment does not detect the electric current on the diode D, only by the electric current on the bridge transistor 40 on sensing circuit 42 sensings, the current waveform that produces shown under Fig. 3 by 44 emulation of current simulations circuit again offers setting resistance R set, and the change in voltage that monitoring is set on the resistance R set is done back coupling control (not shown).In other embodiments, can also be not via simulation, the flow through electric current of diode D of direct-detection adds the General Logistics Department with the electric current of described upper bridge transistor and offers and set resistance R set.
Now see also Fig. 5, Fig. 5 is the schematic diagram of third embodiment of the invention.As shown in the figure, described sensing apparatus 56 detects the electric current of the upper bridge transistor 54 of pressure boosting type electric voltage converter, generation current I1, sensing apparatus 58 detects the electric current of the lower bridge transistor 52 of pressure boosting type electric voltage converter, generation current I2, electric current I 1 and electric current I 2 add assembly current sensor Is through adding way circuit 60, and in Node B generation one voltage confession comparator 66 and reference voltage Vref comparison, do back coupling control to offer controller 64, driver 62 is produced drive signals to Shang Qiao and lower bridge transistor 54 and 52.In the present embodiment, described electric current I 1 and I2 equally can K4 and K5 do the ratio adjustment.
See also at last Fig. 6, Fig. 6 is the variation schematic diagram of the embodiment of Fig. 5.As shown in the figure, the inverse of described K5 is designed to 0, in other words, only the curent change of bridge transistor 54 on the sensing produces current sensor Is according to this to setting resistance R set, monitors the variation of output voltage V o.
In other embodiments, detecting device for output current of the present invention also can be applicable to the electric pressure converter of other pattern, such as buck-boost type, back-pressure type etc.
Above embodiment is only for explanation the present invention, but not limitation of the present invention, person skilled in the relevant technique in the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or variation.Therefore, all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
The element numbers explanation
10 error amplifiers
12 controllers
14 drivers
Bridge testing circuit on 20
22 times bridge testing circuits
24 add way circuit
Bridge transistor on 26
28 times bridge transistors
30 drivers
32 controllers
34 comparators
Bridge transistor on 40
42 sensing circuits
44 current simulations circuit
50 pressure boosting type electric voltage converters
52 times bridge transistors
Bridge transistor on 54
56 sensing circuits
Claims (22)
1. the detecting device for output current of a voltage regulator, described voltage regulator comprises axle assemble on, axle assemble once, one inductance, described upper axle assemble, described lower axle assemble and described inductance three's a end jointly is coupled to one and switches node, described voltage regulator also comprises a controller, and described controller is controlled the switching of described upper bridge and described lower axle assemble to produce output voltage at an output; Described detecting device for output current comprises a sensing circuit, and an artificial circuit and is set resistance, it is characterized in that:
The electric current of the described upper axle assemble of described sensing circuit senses is to produce a current sensor;
Described artificial circuit produces a summed current according to described current sensor simulation;
The variation of the described summed current of described setting resistance detection, and the ohmically change in voltage of described setting offers described controller and does and feedback control.
2. detecting device for output current as claimed in claim 1 is characterized in that, described sensing circuit is the over current protection protection mechanism of described voltage regulator or the part of zero current protection mechanism.
3. detecting device for output current as claimed in claim 1 is characterized in that, an end of described setting resistance connects described artificial circuit, other end ground connection.
4. detecting device for output current as claimed in claim 1 is characterized in that, described upper and lower axle assemble is all transistor.
5. detecting device for output current as claimed in claim 1 is characterized in that, described upper axle assemble is transistor, and lower axle assemble is diode.
6. detecting device for output current as claimed in claim 1, it is characterized in that, described upper axle assemble is coupled between an input and the described switching node, described lower axle assemble is coupled between an earthing potential and the described switching node, and described inductance is coupled between described output and the described switching node.
7. detecting device for output current as claimed in claim 1, it is characterized in that, described upper axle assemble is coupled between described output and the described switching node, described lower axle assemble is coupled between an earthing potential and the described switching node, and described inductance is coupled between an input and the described switching node.
8. detecting device for output current as claimed in claim 1, it is characterized in that, described upper axle assemble is coupled between an input and the described switching node, described lower axle assemble is coupled between described output and the described switching node, and described inductance is coupled between an earthing potential and the described switching node.
9. the method for detecting output current of a voltage regulator, described voltage regulator comprises axle assemble on, axle assemble once, one inductance, described upper axle assemble, described lower axle assemble and described inductance three's a end jointly is coupled to one and switches node, described voltage regulator also comprises a controller, and described controller is controlled the switching of described upper axle assemble and described lower axle assemble to produce output voltage at an output, it is characterized in that described method for detecting output current comprises the following steps:
First step: the electric current of the described upper axle assemble of sensing is to produce a current sensor;
Second step: produce a sum total electric current according to described current sensor simulation;
Third step: described sum total electric current is offered one set resistance;
The 4th step: the ohmically change in voltage of described setting is offered described controller do back coupling control.
10. method for detecting output current as claimed in claim 9 is characterized in that, described upper and lower axle assemble is all transistor.
11. method for detecting output current as claimed in claim 9 is characterized in that, described upper axle assemble is transistor, and lower axle assemble is diode.
12. method for detecting output current as claimed in claim 9, it is characterized in that, described upper axle assemble is coupled between an input and the described switching node, described lower axle assemble is coupled between an earthing potential and the described switching node, and described inductance is coupled between described output and the described switching node.
13. method for detecting output current as claimed in claim 9, it is characterized in that, described upper axle assemble is coupled between described output and the described switching node, described lower axle assemble is coupled between an earthing potential and the described switching node, and described inductance is coupled between an input and the described switching node.
14. method for detecting output current as claimed in claim 9, it is characterized in that, described upper axle assemble is coupled between an input and the described switching node, described lower axle assemble is coupled between described output and the described switching node, and described inductance is coupled between an earthing potential and the described switching node.
15. a voltage regulator comprises axle assemble on, axle assemble once, and an inductance, a controller, a sensing circuit, an artificial circuit and is set resistance, it is characterized in that:
Described upper axle assemble, described lower axle assemble and described inductance three's a end jointly is coupled to one and switches node;
Described controller is controlled the switching of described upper axle assemble and described lower axle assemble to produce output voltage at an output;
The electric current of the described upper axle assemble of described sensing circuit senses is to produce a current sensor;
Described artificial circuit produces a summed current according to described current sensor simulation;
The variation of the described summed current of described setting resistance detection, and the ohmically change in voltage of described setting offers described controller and does and feedback control.
16. voltage regulator as claimed in claim 15 is characterized in that, described sensing circuit is the over current protection protection mechanism of described voltage regulator or the part of zero current detection mechanism.
17. voltage regulator as claimed in claim 15 is characterized in that, an end of described setting resistance connects described artificial circuit, other end ground connection.
18. voltage regulator as claimed in claim 15 is characterized in that, described upper and lower axle assemble is all transistor.
19. voltage regulator as claimed in claim 15 is characterized in that, described upper axle assemble is transistor, and lower axle assemble is diode.
20. voltage regulator as claimed in claim 15, it is characterized in that, described upper axle assemble is coupled between an input and the described switching node, and described lower axle assemble is coupled between an earthing potential and the described switching node, and described inductance is coupled between described output and the described switching node.
21. voltage regulator as claimed in claim 15, it is characterized in that, described upper axle assemble is coupled between described output and the described switching node, and described lower axle assemble is coupled between an earthing potential and the described switching node, and described inductance is coupled between an input and the described switching node.
22. voltage regulator as claimed in claim 15, it is characterized in that, described upper axle assemble is coupled between an input and the described switching node, and described lower axle assemble is coupled between described output and the described switching node, and described inductance is coupled between an earthing potential and the described switching node.
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| TW201310877A (en) * | 2011-08-16 | 2013-03-01 | Wistron Corp | Power supply device and method thereof |
| CN104122805B (en) * | 2013-04-26 | 2016-12-28 | 立锜科技股份有限公司 | Digital satellite equipment control signal produces circuit and relevant signal generating method |
| CN103840664A (en) * | 2014-03-27 | 2014-06-04 | 南京矽力杰半导体技术有限公司 | Constant-current control circuit, switching regulator, integrated circuit and constant-current control method |
| CN104360147A (en) * | 2014-11-24 | 2015-02-18 | 中国航空工业集团公司洛阳电光设备研究所 | Test equipment for three-end voltage regulator |
| CN105811761B (en) * | 2014-12-30 | 2019-08-23 | 展讯通信（上海）有限公司 | A kind of BOOST circuit of current sampling circuit and integrated current sample circuit |
| US10063146B1 (en) * | 2017-03-31 | 2018-08-28 | Alpha And Omega Semiconductor (Cayman) Ltd. | Full-time inductor current monitoring method by sensing low side switch |
| CN113485502A (en) * | 2021-06-29 | 2021-10-08 | 昂宝电子（上海）有限公司 | Constant current control chip, power system and constant current control method |
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| CN1868109A (en) * | 2003-10-17 | 2006-11-22 | 国际整流器公司 | Total feed forward switching power supply control |
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| CN101621250A (en) | 2010-01-06 |
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