CN110071634A - Bootstrap mode circuit and the associated DC to DC converter for using the circuit - Google Patents
Bootstrap mode circuit and the associated DC to DC converter for using the circuit Download PDFInfo
- Publication number
- CN110071634A CN110071634A CN201810062570.1A CN201810062570A CN110071634A CN 110071634 A CN110071634 A CN 110071634A CN 201810062570 A CN201810062570 A CN 201810062570A CN 110071634 A CN110071634 A CN 110071634A
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- transistor
- circuit
- voltage
- bootstrap
- clamp
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A kind of bootstrap mode circuit is applied to the first transistor of DC to DC converter, and bootstrap mode circuit includes second transistor, bootstrap capacitor and clamp circuit.Bootstrap capacitor has first end and second end, the source terminal coupling of first end and second transistor, and the source terminal and the first transistor of second transistor couple.Clamp circuit is coupled between the gate terminal of second transistor and the second end of bootstrap capacitor, and clamp circuit is configured to keep the potential difference between the second end of bootstrap capacitor and the gate terminal of second transistor.The drain electrode end of second transistor couples the first reference voltage, and the maximum value of the voltage level of the gate terminal of the first transistor is greater than the first reference voltage.
Description
Technical field
The present invention is about a kind of bootstrap mode circuit and uses the associated DC to DC converter of the bootstrap mode circuit.
Background technique
By taking buck converter as an example, by conversion multiple switch component open/close state come provide current to inductance with
And capacitor, therefore input voltage can be reduced to obtain output voltage, wherein input voltage is highest voltage value in circuit.This
Outside, it for the buck converter with high input voltage, in order to reduce energy consumption and obtain required pull-up resistor, is often used
N-type transistor realizes, wherein N-type transistor is with having lesser potential difference and drain electrode end between gate terminal and source terminal
With the characteristic of biggish potential difference between source terminal.And gate terminal, source for enable N-type transistor, in N-type transistor
In extreme and drain electrode end, the voltage level of gate terminal should be the highest voltage level of voltage value in three ends.Therefore, work as source electrode
When end is filled with the voltage value of input voltage, the voltage level of gate terminal can not be higher than source terminal without compensation
Voltage level, transistor will be difficult to be enabled.
Summary of the invention
One of purpose of the invention is to provide a kind of bootstrap mode circuit and associated DC to DC converter, with by
This solves foregoing problems.
According to one embodiment of present invention, a kind of the first transistor applied to DC to DC converter is disclosed
Bootstrap mode circuit.Bootstrap mode circuit includes second transistor, bootstrap capacitor and clamp circuit, and wherein bootstrap capacitor has first
The source terminal of end and second end, first end and second transistor couples, the source terminal and the first transistor coupling of second transistor
It connects.Clamp circuit is coupled between the gate terminal of second transistor and the second end of bootstrap capacitor, and clamp circuit is configured to use
To keep the potential difference between the second end of bootstrap capacitor and the gate terminal of second transistor.The drain electrode end of second transistor couples
The maximum value of first reference voltage, the voltage level of the gate terminal of the first transistor is greater than the first reference voltage.
According to one embodiment of present invention, a kind of DC to DC converter is disclosed.DC to DC converter packet
Include switching circuit, inductancecapacitance circuit, feed circuit and bootstrap mode circuit.Switching circuit includes the first transistor and
Two-transistor, wherein switch terminal is coupled to the source terminal of the first transistor and the drain electrode end of second transistor, the first transistor
Drain electrode end and the first reference voltage couple.Inductancecapacitance circuit includes that an at least inductor and capacitor, inductor-capacitor is electric
Road, which is configured in, receives the inductive current from the first reference voltage source by switching circuit to provide energy to back loading.Instead
Current feed circuit and inductance-condenser network couple, and feed circuit is configured in generate output voltage in output end and generate anti-
Feedthrough voltage.Bootstrap mode circuit include third transistor, bootstrap capacitor and clamp circuit, wherein the source terminal of third transistor with
The first transistor coupling, bootstrap capacitor have first end and second end, the source terminal coupling of first end and third transistor.Pincers
Position circuit is coupled between the gate terminal of third transistor and the second end of bootstrap capacitor, and clamp circuit is configured in maintenance certainly
Lift the potential difference between the second end of capacitor and the gate terminal of third transistor.The drain electrode end of third transistor and first is with reference to electricity
The maximum value of pressure coupling, the voltage level of the gate terminal of transistor is greater than the first reference voltage.
To those skilled in the art, following each attached drawing and preferred embodiment shown in the drawings are being read
Detailed description after, these and other objects of the invention will undoubtedly will become obvious.
Detailed description of the invention
Fig. 1 is the schematic diagram using the buck converter of the bootstrap mode circuit of the embodiment of the present invention；
Fig. 2 is the schematic diagram of bootstrap mode circuit according to an embodiment of the present invention；And
Fig. 3 is the schematic diagram of clamp circuit according to an embodiment of the present invention.
Specific embodiment
Certain terms have been used in the whole instruction and claim to refer to specific component.Such as those skilled in the art
It will be recognized, manufacturer can be by different titles come references component.This specification do not distinguish specifically title it is different but
Function identical component.In following description and claims, term " includes " and "comprising" are in open mode
Use, thus be not necessarily to be construed as such as " by ... form " closed term.In addition, term " coupling " is intended to indicate that indirectly
Or direct electrical connection.Therefore, if an equipment is couple to another equipment, this connection can by being directly electrically connected,
Or pass through the indirect electrical connection via other equipment and connection.
As described in the prior art, for the DC to DC converter of such as buck converter, need bootstrap type electric
Road.Fig. 1 illustrates the current-mode buck converter 10 with bootstrap mode circuit 105.Current-mode buck converter
10 include input voltage source 101, switching circuit 102, inductancecapacitance circuit 103 and feed circuit 104.Input voltage source
101 for providing input voltage vin.Switching circuit 102 includes the transistor MD1 and MD2 used as switch.Inductor-capacitor
Circuit 103 includes inductance L and capacitor C, and inductancecapacitance circuit 103 receives by switching circuit 102 and comes from input voltage source 101
Inductive current IL, utilized with supplying energy to back loading.Feed circuit 104 includes resistance R1And R2, feed circuit
104 be for according to inductive current ILIn terminal N1Generate feedback voltage VFB, wherein terminal N1It is coupled in resistance R1And R2Between.
In addition, feed circuit 104 is to according to inductive current ILAnd load current ILOADOutput voltage V is generated in output end OUTO.Such as
Shown in Fig. 1, switching circuit 102 further includes switch terminal NSW, switch terminal NSWIt is coupled to the source terminal and transistor of transistor MD1
Between the drain electrode end of MD2, and as shown in Figure 1, the voltage level of switch terminal is denoted as VSW.In this embodiment, transistor MD1 and
MD2 is realized by the N-type Metal Oxide Semiconductor Field Effect Transistor (MOSFET) with lower pull-up resistor, and is lower than spy
Determine the pull-up resistor of default value while indicating that transistor occupies less energy consumption.It is noted that aforementioned be intended merely to further
Illustrate, is not intended to limit the invention.In other embodiments, transistor MD1 and MD2 can be by other kinds of transistor
To realize.In addition, in other embodiments, the transistor MD2 as switch can be by Schottky diode (Schottky
Diode) replace, but not limited to this.
Bootstrap mode circuit 105 and switching circuit 102 couple, and bootstrap mode circuit 105 is the grid to promote transistor MD1
Extreme voltage level.Bootstrap mode circuit 105 can simultaneously be further illustrated in following paragraphs.Current-mode buck converter 10 is more
It can further comprise peak-current mode control circuit 106.Peak-current mode control circuit 106 includes: error amplifier
116, adder 126, PWM comparator 146, control logic circuit 156, resistance R' and capacitor C'.Error amplifier 116 includes
Negative input end, positive input terminal and output end, negative input end are used to receive feedback voltage VFB, positive input terminal, which is used to receive, refers to electricity
Press Vref, error amplifier 116 is to according to feedback voltage VFBAnd reference voltage VrefOutput voltage V is generated in output endC.Add
Musical instruments used in a Buddhist or Taoist mass 126 is used to receive current sense signal VSCAnd slope voltage VR, wherein current sense signal VSCIt is by high side electric current
166 sensing terminals N of sensing circuit2Electric current generate and slope voltage VRIt is as produced by slope equalizer 136.PWM ratio
It include an output end compared with device 146, PWM comparator 146 is used to the output voltage V of relative error amplifier 116CWith adder 126
Output voltage, and accordingly in its output end generate pwm signal.Control logic circuit 156 is to generate control signal CTRL
To switching circuit 102, make transistor MD1 and MD2 that can be controlled its running by pwm signal.In this embodiment, control logic electricity
Road 156 may include buffer 156_1 (referring to Fig. 2), and buffer 156_1 believes to receive pwm signal and generate and transmit control
Number CTRL to switching circuit 102 transistor MD1.Resistance R' and capacitor C' is one another in series and is coupled to error amplifier 116
Output end, wherein resistance R' and capacitor C' are formed as compensation circuit.However, the compensation circuit is not limited to resistance
R' and capacitor C' is realized.It should be appreciated by those skilled in the art that compensation circuit can be realized by different frameworks.
Meanwhile the current-mode buck converter 10 with slope-compensation mechanism should be well-known to those skilled in the art.
The present invention focuses on the bootstrap mode circuit 105 of the voltage level with the gate terminal for promoting transistor MD1, with solution
The problem of certainly mentioning in the prior art, it should also be noted that bootstrap mode circuit disclosed by the invention 105 is not limited to be applied to such as Fig. 1
Shown in buck converter.
Fig. 2 is the schematic diagram of bootstrap mode circuit 105 according to an embodiment of the present invention, the bootstrap mode circuit 105 and with open
The transistor MD1 on powered-down road 102 is coupled.As shown in Fig. 2, bootstrap mode circuit 105 include transistor MD3, clamp circuit 210, from
Lift capacitor 220, drive current source 230, voltage regulator circuit 240 and 250 and voltage source 260.Clamp circuit 210 is coupled to
The gate terminal and switch terminal N of transistor MD3SWBetween, clamp circuit 210 is to maintain the potential difference between the both ends.
Bootstrap capacitor 220 is coupled to the source terminal N of transistor MD3SAnd switch terminal NSWBetween, bootstrap capacitor 220 is come to receive
From input voltage VinElectric current and use charging, to promote source terminal NSVoltage level.Drive current source 230 is coupled to
The gate terminal and input voltage V of transistor MD3inBetween, drive current source 230 is for providing driving current Id.Voltage tune
Economize on electricity road 240 includes Schottky diode SD1, and Schottky diode SD1 is coupled to drain electrode end and the input of transistor MD3
Voltage VinBetween.Since Schottky diode SD1 is coupled to the drain electrode end of transistor MD3, transistor MD3 can be maintained easily
In saturation state and enough electric currents are provided to bootstrap capacitor 220.Voltage regulator circuit 250 includes Schottky diode SD2, Xiao
Special based diode SD2 is coupled to gate terminal NGAnd between voltage source 260.Voltage source 260 be coupled to voltage regulator circuit 250 with
And between reference voltage (i.e. ground voltage), voltage source 260 is for providing reference voltage VDD.As shown in Fig. 2, transistor MD3
Source terminal NSIt is coupled with the buffer 56_1 of control logic circuit 156, wherein buffer 156_1 receives pwm signal, buffering
Device 156_1 and the gate terminal for generating and transmitting control signal CTRL to transistor MD1.By transistor MD3 with enough electric currents
Stable energy is provided to bootstrap capacitor 220, control logic circuit 156 can control the electricity of the gate terminal of transistor MD1 easily
Voltage levels make the voltage level of the gate terminal of transistor MD1 be promoted to input voltage Vin, asked with solve to mention in the prior art
Topic.
Fig. 3 is the schematic diagram according to the clamp circuit 210 of the embodiment of the present invention.As shown in figure 3, clamp circuit 210 includes
Multiple clamp transistor CT1-CTn, plurality of clamp transistor CT1-CTnEach be by diode transistor Lai
It realizes.For example, multiple clamp transistor CT1-CTnThe gate terminal of each be coupled to each other with drain electrode end, and multiple clampers
Transistor CT1-CTnIt is one another in series.In this embodiment, multiple clamp transistor CT1-CTnEach door having the same
Voltage (threshold voltage) Vt, and the gate terminal N of transistor MD3GWith switch terminal NSWBetween potential difference be NVt.?
In other embodiments, the threshold voltage V of each of multiple clamp transistor CT1-CTntIt is not limited to identical.It needs to infuse
Meaning, reference voltage VDDIt is designed to the gate terminal N greater than transistor MD3GWith switch terminal NSWBetween potential difference NVt, i.e.,
VDD>NVt.According to the bootstrap mode circuit 105 for being disclosed in embodiment of this case, bootstrap capacitor 220 can charge in state below:
(1) as switch terminal NSWVoltage level VSWGreater than zero and voltage level VSWIn addition potential difference NVtVoltage value be less than
Reference voltage VDD, i.e. VSW> 0, VSW+NVt<VDD, the cross-pressure on bootstrap capacitor 220 is VDD-VSW-VGS, wherein VGSFor gate terminal NG
With source terminal NSPotential difference.
(2) as switch terminal NSWOn voltage level VSWGreater than zero, and voltage level VSWIn addition potential difference NVtVoltage value
Greater than reference voltage VDD, i.e. VSW> 0, VSW+NVt>VDD, the cross-pressure on bootstrap capacitor 220 is NVt-VGS。
(3) as switch terminal NSWOn voltage level VSWLevel off to zero, the cross-pressure on bootstrap capacitor 220 is VDD-VGS。
(4) as switch terminal NSWOn voltage level VSWLess than zero, the cross-pressure on bootstrap capacitor 220 is VDD- VSW-VGS。
In addition to voltage level VSWClose to input voltage VinExcept in the case of, bootstrap capacitor 220 can be under case described above
It is electrically charged, therefore, the efficiency of bootstrap mode circuit 105 can be promoted significantly.The problem of being previously mentioned in the prior art can be effective
It solves.
Comprehensive the above, the invention discloses a kind of bootstrap mode circuits that can effectively charge to bootstrap capacitor 220, to mention
For the source terminal N of stable energy to transistor MD3SAnd switch terminal NSWBetween, and control logic circuit 156 can control easily
The voltage level of the gate terminal of transistor MD1 promotes the voltage level of the gate terminal of transistor MD1 and is higher than input voltage
Vin。
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the invention as claimed with
Modification, is all covered by the present invention.Therefore, above disclosure should be interpreted the only side by appended claims
Boundary system.
Reference signs list
10: current-mode buck converter
101: input voltage source
102: switching circuit
103: inductancecapacitance circuit
104: feed circuit
105: bootstrap mode circuit
106: peak-current mode control circuit
116: error amplifier
126: adder
136: slope equalizer
146:PWM comparator
156: control logic circuit
156_1: buffer
166: high side current sensing circuit
210: clamp circuit
220: bootstrap capacitor
230: drive current source
240,250: voltage regulator circuit
260: voltage source
C, C': capacitor
Id: driving current
IL: inductive current
ILOAD: subsequent load current
L: inductance
MD1, MD2, MD3: transistor
NS: source terminal
NG: gate terminal
SD1, SD2: Schottky diode
CT、CT1-CTn: clamp transistor
N1、N2: terminal
PWM:PWM signal
R1、R'、R2: resistance
OUT: output end
Vin: input voltage
NVt: potential difference
NSW: switch terminal
CTRL: control signal
VSW: voltage level
VO: output voltage
Vref: reference voltage
Vc: output voltage
VR: ramp voltage
VFB: feedback voltage
VSC: current sense signal
VDD: high power supply voltage
VGS: potential difference
Claims (20)
1. a kind of bootstrap mode circuit of a first transistor applied to the direct current transducer that circulates always, comprising:
One second transistor；
One bootstrap capacitor has a first end and a second end, wherein the source-side of the first end and the second transistor
Coupling, the source terminal of the second transistor and the first transistor couple；And
One clamp circuit is coupled between a gate terminal of the second transistor and the second end of the bootstrap capacitor, the pincers
Position circuit is to maintain the potential difference between the second end of the bootstrap capacitor and the gate terminal of the second transistor；
Wherein a drain electrode end of the second transistor and one first reference voltage couple, the electricity of a gate terminal of the first transistor
The maximum value of voltage levels is greater than first reference voltage.
2. bootstrap mode circuit as described in claim 1, further include:
One voltage regulator circuit, wherein the voltage regulator circuit is coupled to drain electrode end and first ginseng of the second transistor
It examines between voltage.
3. bootstrap mode circuit as claimed in claim 2, wherein the voltage regulator circuit includes a Schottky diode.
4. bootstrap mode circuit as described in claim 1, further include:
One drive current source is coupled between first reference voltage and the clamp circuit.
5. bootstrap mode circuit as described in claim 1, further include:
One voltage regulator circuit is coupled between the gate terminal and one second reference voltage of the second transistor.
6. bootstrap mode circuit as claimed in claim 5, wherein the voltage regulator circuit includes a Schottky diode.
7. bootstrap mode circuit as described in claim 1, wherein the clamp circuit includes an at least clamp transistor.
8. bootstrap mode circuit as claimed in claim 7, a drain electrode end and the clamp transistor of each clamp transistor
The coupling of one gate terminal.
9. bootstrap mode circuit as claimed in claim 7, further includes:
One voltage source is configured to supply one second reference voltage, and wherein second reference voltage is greater than a default value, the default
Value is the summation of the threshold voltage of those clamp transistors.
10. bootstrap mode circuit as claimed in claim 9, when the voltage level of the second end of the bootstrap capacitor is greater than zero, and
Second reference voltage is less than the voltage level of the second end of the bootstrap capacitor and a summation of the default value, bootstrapping electricity
The charging of Rong Yiyi voltage, the voltage are equal to the threshold voltage that the default value subtracts the second transistor.
11. a kind of DC to DC converter, comprising:
One switching circuit, including a first transistor and a second transistor, wherein a switch terminal is coupled to the first crystal
Between the source-side of pipe and a drain electrode end of the second transistor, a drain electrode end of the first transistor is coupled to one first
Reference voltage；
One inductancecapacitance circuit, including an at least inductance and a capacitor, wherein the inductancecapacitance circuit be configured as via
The switching circuit receives an inductive current of first reference voltage, to supply energy to one with back loading；
One feed circuit is coupled with the inductancecapacitance circuit, and wherein the feed circuit is configured as generating an output voltage in one
One feedback voltage of output end and generation；And
One bootstrap mode circuit, comprising:
One third transistor, wherein the source-side of the third transistor and the first transistor couple；
One clamp circuit is coupled between the gate terminal and the switch terminal of the third transistor, and wherein the clamp circuit is
To maintain the voltage level of the switch terminal；And
One bootstrap capacitor, wherein the bootstrap capacitor is coupled between the source terminal and the switch terminal of the third transistor；
Wherein, the maximum value of the voltage level of the gate terminal of the first transistor is greater than first reference voltage.
12. DC to DC converter as claimed in claim 11, the wherein bootstrap mode circuit further include:
One voltage regulator circuit, wherein the voltage regulator circuit is coupled to a drain electrode end and first ginseng for the third transistor
It examines between voltage.
13. DC to DC converter as claimed in claim 12, wherein the voltage regulator circuit includes two pole of a Schottky
Pipe.
14. DC to DC converter as claimed in claim 11, the wherein bootstrap mode circuit further include:
One drive current source is coupled between first reference voltage and the clamp circuit.
15. DC to DC converter as claimed in claim 11, the wherein bootstrap mode circuit further include:
One voltage regulator circuit is coupled between the gate terminal and one second reference voltage of the third transistor.
16. DC to DC converter as claimed in claim 15, wherein the voltage regulator circuit includes two pole of a Schottky
Pipe.
17. DC to DC converter as claimed in claim 11, wherein the clamp circuit of the bootstrap mode circuit includes extremely
A few clamp transistor.
18. DC to DC converter as claimed in claim 17, wherein a drain electrode end of each clamp transistor with should
One gate terminal of clamp transistor couples.
19. DC to DC converter as claimed in claim 17, wherein the bootstrap mode circuit includes:
One voltage source is configured to supply one second reference voltage, and wherein second reference voltage is greater than a default value, the default
Value is the summation of the threshold voltage of those clamp transistors.
20. DC to DC converter as claimed in claim 19, wherein when the voltage level of the switch terminal is greater than zero, and should
Second reference voltage is less than the voltage level of the switch terminal and a summation of the default value, the bootstrap capacitor are filled with a voltage
Electricity, the voltage are equal to the threshold voltage that the default value subtracts the third transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810062570.1A CN110071634B (en) | 2018-01-23 | 2018-01-23 | Bootstrap circuit and associated DC-to-DC converter using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810062570.1A CN110071634B (en) | 2018-01-23 | 2018-01-23 | Bootstrap circuit and associated DC-to-DC converter using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110071634A true CN110071634A (en) | 2019-07-30 |
| CN110071634B CN110071634B (en) | 2020-06-23 |
Family
ID=67364726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810062570.1A Active CN110071634B (en) | 2018-01-23 | 2018-01-23 | Bootstrap circuit and associated DC-to-DC converter using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110071634B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040012437A1 (en) * | 2002-07-18 | 2004-01-22 | Hynix Semiconductor Inc. | Boosting circuit |
| US7518352B2 (en) * | 2007-05-11 | 2009-04-14 | Freescale Semiconductor, Inc. | Bootstrap clamping circuit for DC/DC regulators and method thereof |
| CN204271895U (en) * | 2014-12-12 | 2015-04-15 | 上海数明半导体有限公司 | A kind of boostrap circuit |
-
2018
- 2018-01-23 CN CN201810062570.1A patent/CN110071634B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040012437A1 (en) * | 2002-07-18 | 2004-01-22 | Hynix Semiconductor Inc. | Boosting circuit |
| US7518352B2 (en) * | 2007-05-11 | 2009-04-14 | Freescale Semiconductor, Inc. | Bootstrap clamping circuit for DC/DC regulators and method thereof |
| CN204271895U (en) * | 2014-12-12 | 2015-04-15 | 上海数明半导体有限公司 | A kind of boostrap circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110071634B (en) | 2020-06-23 |
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