CN101621056B - Multi-chip module for power supply circuit and voltage regulator using same - Google Patents
Multi-chip module for power supply circuit and voltage regulator using same Download PDFInfo
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- CN101621056B CN101621056B CN 200810127994 CN200810127994A CN101621056B CN 101621056 B CN101621056 B CN 101621056B CN 200810127994 CN200810127994 CN 200810127994 CN 200810127994 A CN200810127994 A CN 200810127994A CN 101621056 B CN101621056 B CN 101621056B
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Abstract
The invention discloses a multi-chip module for a power supply circuit, comprising two MOSFET, a driver and a controller; wherein, the two MOSFET are respectively provided with a gate electrode, the driver is connected with the two gate electrodes, and the controller is connected with the driver to provide an inner PWM signal to the driver. The multi-chip module for a power supply circuit and a voltage regulator using the multi-chip module of the invention have the advantages of shortening a feedback path between a path and the controller and lowering power loss and noise interference.
Description
Technical field
The present invention relates to low-voltage, the high current-voltage regulator of a kind of use multichannel step-down controller (buck converter), specifically, be multi-chip module (the Multi-Chip Module of an a kind of controller integrating step-down controller, driver and two metal-oxide half field effect transistors (MOSFET); MCM).
Background technology
In the low-voltage of using the multichannel step-down controller, high current-voltage regulator were used, the entity circuit occupied the area of certain degree on printed circuit board (PCB) (PCB).Generally acknowledging at present can parasitic element be gone up in layout path (layout path) and PCB upward improves the efficient of transducer to lead (trace) power loss that is caused of noise-sensitive by reducing.
Fig. 1 is the schematic diagram of the local layout of a motherboard, expression is according to the platform layout requirement (Intel Platform Layout Requirements for CPU power supply) of Intel (Intel) company to the central processing unit power supply unit, the position of each assembly on PCB of voltage regulator.This voltage regulator contains four passages, understands for convenient, marks South Bridge chip, north bridge chips and the central processing unit position 12,14 and 18 on PCB 10 among the figure.The controller of voltage regulator is arranged on the position 16 of central processing unit 18 belows, each channel is distributed toward north by the position 16 of controller, channel 1 and channel 2 are on position 20 nearby, central processing unit 18 east sides, and channel 3 and channel 4 are on the position 22 of central processing unit 18 north sides.In this layout, the back coupling lead that is withdrawn into controller from channel 3 and channel 4 must stride across half PCB 10, and the path is very long.If more multichannel words are arranged, its back coupling lead will stride across whole PCB 10, and the path will be longer.
Multi-chip module is a kind of Electronic Packaging, and it comprises a plurality of integrated circuits of isolating with insulant and is placed on the shared substrate, coats whole module with encapsulant again, but not coats independent integrated circuit.No. the 6879491st, United States Patent (USP) has been eliminated the PCB lead between driver and the MOSFET by integrating a driver and two power MOSFETs in single encapsulation.Yet this technology does not have help for the signal path that shortens between controller and the driver.Fig. 2 is the schematic diagram of a known voltage adjuster, as shown in Figure 2, a voltage regulator comprises the multi-chip module 22 (being called for short DrMOS) of a plurality of integration drivers and MOSFET, and a controller 24 produces pulse-width modulation signal PWM1 to PWMN to each multi-chip module 22, to control the driver drives MOSFET in it.Because driver and MOSFET are encapsulated in the one chip, loss that signal path caused and interference between the two have therefore been eliminated.But controller 24 must be from current sensor (Current Sensor; CS) 26 obtain feedback signal, the current sensing signal of each channel need be feedback by two leads 28 and 30, and therefore, the voltage regulator with N channel needs 2 * N bar lead feedback current sensing signal.The physical path of these leads on PCB is very long, and therefore, current sensing signal still can suffer loss and noise jamming in these physical path.
Therefore the known voltage adjuster exists above-mentioned all inconvenience and problem.
Summary of the invention
Purpose of the present invention is to propose a kind of multi-chip module that provides power circuit to use.
Another object of the present invention is to propose a kind of voltage regulator that uses multi-chip module.
For achieving the above object, technical solution of the present invention is:
A kind of multi-chip module that provides power circuit to use comprises two MOSFET, a driver and a controller, wherein,
Described two MOSFET respectively have a gate;
Described driver connects described two gates;
Described controller connects described driver, to provide an inner pwm signal to described driver;
One internal current transducer connects described controller, to provide a feedback signal to described controller.
Wherein, described internal current transducer connect described MOSFET one of them, produce described feedback signal to detect described MOSFET electric current.
Multi-chip module of the present invention can also be further achieved by the following technical measures.
A kind of multi-chip module that provides power circuit to use comprises two MOSFET, and a driver and a controller is characterized in that:
Described two MOSFET respectively have a gate;
Described driver connects described two gates;
Described controller connects described driver, to provide an inner pwm signal to described driver;
Also comprise an internal current transducer, connect described controller, to provide a feedback signal to described controller;
Described multi-chip module, wherein said controller determines described inner pwm signal according to a described feedback signal and an external reference current signal.
A kind of voltage regulator comprises several passages and is connected in parallel between a power input and the output, and each described passage comprises an inductance, a multi-chip module and a foreign current transducer, wherein,
Described inductance is connected between described power input and the described output;
Described multi-chip module is connected between described power input and the described inductance, and described multi-chip module comprises:
Two MOSFET that are cascaded respectively have a gate;
One driver connects described two gates;
One controller connects described driver, to provide an inner pwm signal to described driver;
Described foreign current transducer detects the electric current of described inductance, to provide a feedback signal to described multi-chip module;
Wherein, described controller switches described two MOSFET by described inner pwm signal, to control described inductive current.
Voltage regulator of the present invention can also be further achieved by the following technical measures.
Aforesaid voltage regulator wherein also comprises:
One foreign current transducer connects described output, produces a total current signal with the total current that detects described several passages;
One reference current generator connects described foreign current transducer, produces a reference current signal from described total current signal and gives described each multi-chip module.
Aforesaid voltage regulator comprises more that wherein a reference current generator connects described each foreign current transducer, produces a reference current signal from described each feedback signal and gives described each multi-chip module.
A kind of voltage regulator comprises several passages and is connected in parallel between a power input and the output, and each described passage comprises an inductance and a multi-chip module, wherein,
Described inductance is connected between described power input and the described output;
Described multi-chip module is connected between described power input and the described inductance, and described multi-chip module comprises:
Two MOSFET that are cascaded respectively have a gate;
One driver connects described two gates;
One controller connects described driver, to provide an inner pwm signal to described driver;
One internal current transducer connects described controller, and the feedback signal of size of current that the described inductance of an expression is provided is to described controller;
Wherein, described controller switches described two MOSFET by described inner pwm signal, to control described inductive current.
Voltage regulator of the present invention can also be further achieved by the following technical measures.
Aforesaid voltage regulator, wherein said internal current transducer connect described two MOSFET one of them, determine described feedback signal to detect described MOSFET electric current.
Aforesaid voltage regulator wherein also comprises:
One foreign current transducer connects described output, produces a total current signal with the total current that detects described several passages;
One reference current generator connects described foreign current transducer, produces a reference current signal from described total current signal and gives described each multi-chip module.
Aforesaid voltage regulator comprises more that wherein a reference current generator connects described each multi-chip module, produces a reference current signal from described each feedback signal and gives described each multi-chip module.
After adopting technique scheme, the multi-chip module that power supply source circuit of the present invention is used and have following advantage with the voltage regulator of multi-chip module:
1. shorten the feedback path between passage and the controller.
2. reduction power loss.
3. reduction noise jamming.
Description of drawings
Fig. 1 is the schematic diagram of the local layout of a motherboard;
Fig. 2 is the schematic diagram of a known voltage adjuster;
Fig. 3 is a multi-chip module of the present invention;
Fig. 4 is the local circuit 1 of voltage regulator of the present invention;
Fig. 5 is the local circuit 2 of voltage regulator of the present invention;
Fig. 6 is the local circuit 3 of voltage regulator of the present invention;
Fig. 7 is the local circuit 4 of voltage regulator of the present invention;
Fig. 8 is the local circuit 5 of voltage regulator of the present invention;
Fig. 9 is the local circuit 6 of voltage regulator of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof the present invention is illustrated further.
Now see also Fig. 3, Fig. 3 is a multi-chip module of the present invention.As shown in the figure, described multi-chip module 32 is incorporated into modulator 34, driver 36 and two power MOSFETs 38 and 40 in the one chip.Described modulator 34 produces inner pwm signal according to external control signal CTL and gives driver 36, with switching mosfet 38 and 40.Described external control signal CTL may comprise current signal, voltage signal and other control signal, and for example reference current signal, output voltage feedback signal, external PWM signal or the like depend on the design in the practical application.As known, described modulator 34, driver 36 and MOSFET 38 and 40 all are bonded on the base plate for packaging (not shown) of a MCM.According to the planning of side circuit, also the function of current sense can be incorporated in the lump in the multi-chip module 32 inside CS42 as shown in FIG..In the present invention, " inside " is meant in multi-chip module, and " outside " is meant outside multi-chip module.In many application, shown in the multi-chip module 44 of below among Fig. 3, described controller 46 expressions comprise modulator at interior control circuit, are also sometimes referred to as the PWM controller, and power switch 48 and 50 is MOSFET or other changeover module.Under the principle that is without loss of generality, following figure and explanation all produce the circuit that inner pwm signal is given driver 36 with controller 46 representatives, explain orally the present invention.
See also Fig. 4 again, Fig. 4 is the local circuit 1 of voltage regulator of the present invention.As shown in the figure, comprise that several passages are connected in parallel between power input Vin and the output end vo.Each channel contain a multi-chip module 52 and inductance L j (j=1,2 ..., N) be connected between power input Vin and the output end vo.A controller 46, driver 36 and two power MOSFETs 38 and 40 have been integrated in the described multi-chip module 52.Each passage foreign current transducer of use (CS) 26 detection inductive current iLj (j=1,2 ..., N), provide feedback signal to controller 46.The described multi-chip module 52 of each channel by separately controller 46 produce inner pwm signal PWMj (j=1,2 ..., N) give separately driver 36, with control inductive current iL1～iLN.Because controller 46 and driver 36 are incorporated in the multi-chip module 52, so the signal path between controller 46 and the driver 36 is very short, and controller 46 close outside CS 26, so feedback path is also very short.
Fig. 5 is the local circuit 2 of voltage regulator of the present invention, is to use the local circuit of voltage regulator of the multi-chip module 44 of Fig. 3.In this embodiment, do not use outside CS to detect inductive current iL1～iLN, provide feedback signal to controller 46 and change by inner CS 42, therefore the embodiment than Fig. 4 further shortens feedback path.Inner CS 42 can be by detecting electric current or other signal of MOSFET 38 or 40, to produce the feedback signal relevant with inductive current.
In certain embodiments, be the local circuit 3 of voltage regulator of the present invention as Fig. 6, the inside CS 56 of described multi-chip module 54 detects current i 1～iN of MOSFET 38, but not directly detects inductive current iL1～iLN.In addition, outside CS 58 detects total current and produces total current signal itotal from output end vo, reference current generator 60 produces reference current signal iref from it and gives each multi-chip module 54, and the reference current signal iref that feedback signal that controller 46 provides according to CS 56 and reference current generator 60 provide produces inner pwm signal to driver 36.By feedbacking reference current signal iref, inductive current iL1～iLN that can each passage of balance eliminates the non-ideal effects that component differences caused of each channel.Reference current generator 60 can be placed near on the position of output end vo, to simplify the coiling of PCB.
See also Fig. 7, Fig. 7 is the local circuit 4 of voltage regulator of the present invention, and Fig. 7 is the embodiment of a variation.In multi-chip module 62, inner CS 64 detects current signal i1～iN that MOSFET 40 is produced, give controller 46 except feedbacking, also send outside the multi-chip module 62, reference current generator 66 produces reference current signal iref to the controller 46 each multi-chip module 62 from current signal i1～iN.
See also Fig. 8, Fig. 8 is the local circuit 5 of voltage regulator of the present invention, it is the further improvement form of Fig. 4 embodiment, outside CS 58 detects total current, reference current generator 60 produces reference current signal iref to the controller 46 each multi-chip module 68, for the inductive current iL1～iLN of each passage of balance from its total current signal itotal that provides.
See also Fig. 9 at last, Fig. 9 is the local circuit 6 of voltage regulator of the present invention, it is the change shape of Fig. 8 embodiment, reference current generator 66 produces reference current signal iref to each multi-chip module 68, for the inductive current iL1～iLN of each passage of balance from inductor current signal iL1～iLN of each channel.
In sum, the present invention proposes a kind of multi-chip module, by integrating a controller, a driver and two MOSFET in one chip, further eliminated the PCB lead between controller and the driver, and the signal path between current sensor and the controller, thereby reduce power loss and noise jamming.Multi-chip module of the present invention has also been simplified the coiling of PCB simultaneously.
Above embodiment is only for the usefulness that the present invention is described, but not limitation of the present invention, person skilled in the relevant technique under the situation that does not break away from the spirit and scope of the present invention, can also be made 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 PCB
The position of 12 South Bridge chips
The position of 14 north bridge chips
The position of 16 controllers
The position of 18 channels 1 and channel 2
The position of 20 channels 3 and channel 4
22 DrMOS
24 controllers
26 current sensors
28 PCB leads
30 PCB leads
32 multi-chip modules
34 modulators
36 drivers
38 MOSFET
40 MOSFET
42 inner CS
44 multi-chip modules
46 controllers
48 power switchs
50 power switchs
52 multi-chip modules
54 multi-chip modules
56 inner CS
58 outside CS
60 reference current generators
62 multi-chip modules
64 inner CS
66 reference current generators
68 multi-chip modules
Claims (9)
1. a multi-chip module that provides power circuit to use comprises two MOSFET, and a driver and a controller is characterized in that:
Described two MOSFET respectively have a gate;
Described driver connects described two gates;
Described controller connects described driver, to provide an inner pwm signal to described driver; And
One internal current transducer connects described controller, to provide a feedback signal to described controller;
Wherein, described internal current transducer connect described MOSFET one of them, produce described feedback signal to detect described MOSFET electric current.
2. a multi-chip module that provides power circuit to use comprises two MOSFET, and a driver and a controller is characterized in that:
Described two MOSFET respectively have a gate;
Described driver connects described two gates;
Described controller connects described driver, to provide an inner pwm signal to described driver; And
One internal current transducer connects described controller, to provide a feedback signal to described controller;
Wherein, described controller determines described inner pwm signal according to a described feedback signal and an external reference current signal.
3. a voltage regulator comprises several passages and is connected in parallel between a power input and the output, and each described passage comprises an inductance, and a multi-chip module and a foreign current transducer is characterized in that:
Described inductance is connected between described power input and the described output;
Described multi-chip module is connected between described power input and the described inductance, and described multi-chip module comprises:
Two MOSFET that are cascaded respectively have a gate;
One driver connects described two gates;
One controller connects described driver, to provide an inner pwm signal to described driver; And
Described foreign current transducer detects the electric current of described inductance, to provide a feedback signal to described multi-chip module;
Wherein, described controller switches described two MOSFET by described inner pwm signal, to control described inductive current.
4. voltage regulator as claimed in claim 3 is characterized in that, also comprises:
One foreign current transducer connects described output, produces a total current signal with the total current that detects described several passages; And
One reference current generator connects described foreign current transducer, produces a reference current signal from described total current signal and gives described each multi-chip module.
5. voltage regulator as claimed in claim 3 is characterized in that, comprises that more a reference current generator connects described each foreign current transducer, produces a reference current signal from described each feedback signal and gives described each multi-chip module.
6. a voltage regulator comprises several passages and is connected in parallel between a power input and the output, and each described passage comprises an inductance and a multi-chip module, it is characterized in that:
Described inductance is connected between described power input and the described output;
Described multi-chip module is connected between described power input and the described inductance, and described multi-chip module comprises:
Two MOSFET that are cascaded respectively have a gate;
One driver connects described two gates;
One controller connects described driver, to provide an inner pwm signal to described driver; And
One internal current transducer connects described controller, and the feedback signal of size of current that the described inductance of an expression is provided is to described controller;
Wherein, described controller switches described two MOSFET by described inner pwm signal, to control described inductive current.
7. voltage regulator as claimed in claim 6 is characterized in that, described internal current transducer connect described two MOSFET one of them, determine described feedback signal to detect described MOSFET electric current.
8. voltage regulator as claimed in claim 6 is characterized in that, also comprises:
One foreign current transducer connects described output, produces a total current signal with the total current that detects described several passages; And
One reference current generator connects described foreign current transducer, produces a reference current signal from described total current signal and gives described each multi-chip module.
9. voltage regulator as claimed in claim 6 is characterized in that, comprises that more a reference current generator connects described each multi-chip module, produces a reference current signal from described each feedback signal and gives described each multi-chip module.
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| CN 200810127994 CN101621056B (en) | 2008-07-01 | 2008-07-01 | Multi-chip module for power supply circuit and voltage regulator using same |
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| CN 200810127994 CN101621056B (en) | 2008-07-01 | 2008-07-01 | Multi-chip module for power supply circuit and voltage regulator using same |
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| CN101621056B true CN101621056B (en) | 2011-11-16 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114796A (en) * | 2006-06-30 | 2008-01-30 | 英特赛尔美国股份有限公司 | Gate driver topology for maximum load efficiency |
| CN101383560A (en) * | 2007-09-05 | 2009-03-11 | 财团法人工业技术研究院 | DC voltage converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114796A (en) * | 2006-06-30 | 2008-01-30 | 英特赛尔美国股份有限公司 | Gate driver topology for maximum load efficiency |
| CN101383560A (en) * | 2007-09-05 | 2009-03-11 | 财团法人工业技术研究院 | DC voltage converter |
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