CN104124731A - High-voltage battery power supply control circuit and high-voltage battery power supply control method - Google Patents
High-voltage battery power supply control circuit and high-voltage battery power supply control method Download PDFInfo
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- CN104124731A CN104124731A CN201410269767.4A CN201410269767A CN104124731A CN 104124731 A CN104124731 A CN 104124731A CN 201410269767 A CN201410269767 A CN 201410269767A CN 104124731 A CN104124731 A CN 104124731A
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- tension battery
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Abstract
Provided are a high-voltage battery power supply control circuit and a high-voltage battery power supply control method. The high-voltage battery power supply control circuit is coupled between a high-voltage battery pack and a non-high-voltage device. The high-voltage battery power supply control circuit comprises a voltage reduction device, a switch device and a control device. The voltage reduction device is coupled between the high-voltage battery pack and the non-high-voltage device. The switch device is coupled between the high-voltage battery pack and the non-high-voltage device. The control device controls the switch device according to a voltage value of supply voltage provided by the high-voltage battery pack. When the voltage value of the supply voltage is larger than a critical voltage value, the control device causes the switch device to be disconnected, the supply voltage is reduced through the voltage reduction device, and the supply voltage reduced serves as working voltage of the non-high-voltage device. When the voltage value of the supply voltage is smaller than the critical voltage value, the control device causes the switch device to be connected, and the supply voltage directly serves as the working voltage of the non-high-voltage device.
Description
Technical field
The present invention relates to a kind of control circuit, particularly relevant a kind of high-tension battery power-supplying circuit.
Background technology
The high charge deboost of tradition lithium battery is 4.2V, but along with the development of portable electron device, traditional lithium battery cannot satisfy the demands.The high-tension battery group of a kind of 4.35V of having is adopted by portable electron device gradually.But, in portable electron device, still there are some chips, for example power amplifier (Power amplifier, PA), power management integrated circuit (Power management integrated circuit, PMIC), be designed to receive the operating voltage of 4.2V, if this type of chip directly receives the operating voltage of 4.35V, may cause the damage of chip or life-span to be reduced.
Therefore, this area needs a kind of high-tension battery power-supplying circuit for the protection of these chips, makes these chips avoid directly receiving high voltage.
Summary of the invention
In view of this, an example embodiment of the present invention proposes a kind of high-tension battery power-supplying circuit.In the present embodiment, high-tension battery power-supplying circuit, is coupled between high-tension battery group and non-high voltage device.This high-tension battery power-supplying circuit comprises dropping equipment, switching device and control device.Dropping equipment is coupled between this high-tension battery group and this non-high-pressure installation.Switching device is coupled between this high-tension battery group and this non-high-pressure installation.This switching device of magnitude of voltage control of the supply voltage that control device provides according to this high-tension battery group.Wherein, in the time that the magnitude of voltage of this supply voltage is greater than critical voltage value, this this switching device of not conducting of control device, makes this supply voltage by this dropping equipment step-down, and this supply voltage after step-down is as the operating voltage of this non-high-pressure installation.In the time that the magnitude of voltage of this supply voltage is less than this critical voltage value, this this switching device of control device conducting, makes this supply voltage directly as the operating voltage of this non-high-pressure installation.
An example embodiment of the present invention proposes a kind of high-tension battery method for controlling power supply.In the present embodiment, high-tension battery method for controlling power supply, comprising: the magnitude of voltage of the supply voltage that detection high-tension battery group provides; In the time that the magnitude of voltage of this supply voltage is greater than critical voltage value, this supply voltage of step-down the operating voltage using this supply voltage after step-down as non-high-pressure installation; In the time that the magnitude of voltage of this supply voltage is less than this critical voltage value, the directly operating voltage using this supply voltage as this non-high-pressure installation.
The high-tension battery power-supplying circuit of the application of the invention and high-tension battery method for controlling power supply, not only can avoid non-high-pressure installation to receive high voltage, can also improve the utilization ratio of power supply.
Brief description of the drawings
Fig. 1 shows according to the system schematic of the electronic installation with high-tension battery power-supplying circuit described in one embodiment of the invention.
Fig. 2 is the system schematic that shows the described according to a further embodiment of the invention electronic installation with high-tension battery power-supplying circuit.
Embodiment
Because the present invention allows various changes and various embodiments, therefore by shown in the drawings and describe particular implementation example in detail in following content.But this is not intended to limit the invention to specific implementation pattern, need understand, do not depart from spirit of the present invention and technical scope institute change, equivalent and replacement all in the present invention involved.In additional diagram, for the sake of clarity, the dimension of enlarged configuration.
When use similarly is " first ", " second " or when similarly various assembly described in term, these assemblies should not limited by above-mentioned term.Above-described term is only for an assembly is distinguished from another assembly.For instance, one first assembly can be regarded as one second assembly and can not depart from the scope of disclosure right, and identical, and one second assembly can be regarded as one first assembly.
In the following description, technical term is only for concrete exemplary embodiment is described, and do not limit the present invention.Unless phase counterstatement, the term of singulative can comprise multiple forms." comprise ", " by ... form ", " comprising " or " by ... composition " regulation attribute, region, stationary digital, step, processing, assembly and/or parts, but do not get rid of attribute, region, stationary digital, step, processing, assembly and/or parts.
Unless different definition the term that uses of the execution mode of concept of the present invention, otherwise can be connotation known to those skilled in the art by terminological interpretation.Term similarly is that existing term in use and dictionary, should be interpreted as having the connotation of mating with the context connotation of this area conventionally.In specification, unless clear and definite definition, otherwise be not form connotation by the overinterprete of the term imagination.
Fig. 1 shows according to the system schematic of the electronic installation with high-tension battery power-supplying circuit 130 10 described in one embodiment of the invention.Electronic installation 10 is for example intelligent mobile phone, personal digital assistant (Personal Digital Assistant, PDA), flat computer etc.With reference to Fig. 1, electronic installation 10 comprises: high-tension battery group 120, high-tension battery power-supplying circuit 130, non-high-pressure installation 140, high-pressure installation 150, voltage check device 160, master chip 170.
In the present embodiment, electronic installation 10 has adopted has high-tension high-tension battery group 120, for example, be 4.35V, and it is greater than the magnitude of voltage of tradition reason battery in essence, for example, be 4.2V.Non-high-pressure installation 140 comprises multiple chip 142-14k, and wherein k is positive integer.These chips 142-14k is designed to receive has the critical voltage value of being less than, for example 4.2V, operating voltage, if receiving, these chips 142-14k there is the critical voltage value of being greater than, for example 4.2V, operating voltage time, these chips 142-14k may damage, its chips 142 is for example that power amplifier (PA), chip 144 are for example power management chip (PMIC).High-pressure installation 150 is designed to receive has the operating voltage that is greater than critical voltage value, and for example 4.3V, also can receive lower magnitude of voltage, wherein for example some power supply chip independently of high-pressure installation 150.Master chip 170 is mainly used to control the operation of non-high-pressure installation 140 and high-pressure installation 150.For instance, master chip 170 is exported radiofrequency signal to power amplifier or is output control signals to power management chip.
High-tension battery power-supplying circuit 130 is coupled between high-tension battery group 120 and non-high-pressure installation 140.High-tension battery power-supplying circuit 130 comprises dropping equipment 132 and switching device 134.Dropping equipment 132 is coupled between high-tension battery group 120 and non-high-pressure installation 140.Switching device 134 is in parallel with dropping equipment 132 to be also coupled between high-tension battery group 120 and non-high-pressure installation 140.The control device of master chip 170, for example, be analog-digital converter 172 (Analog-Digital-Converter, ADC), the supply voltage V providing according to high-tension battery group 120
supplymagnitude of voltage control switch device 134.As supply voltage V
supplymagnitude of voltage, for example 4.35V, is greater than a critical voltage value, for example when 4.2V, ADC172 exports a control signal S
cswitching device 134 is disconnected, make to supply voltage V
supplyby dropping equipment 132 step-downs, the supply voltage V after step-down
supplyas the operating voltage of non-high-pressure installation 140.By this mode, high-tension battery power-supplying circuit 130 can protect non-high-pressure installation 140 to avoid receiving high voltage.On the contrary, as supply voltage V
supplymagnitude of voltage, for example 4V, is less than critical voltage value, for example, when 4.2V, ADC172 output control signal S
cactuating switch device 134, makes to supply voltage V
supplyby the direct operating voltage as non-high-pressure installation 140 of switching device 134.By this mode, high-tension battery power-supplying circuit 130 can promote the power utilization efficiency of high-tension battery group 120.
In a specific embodiment, electronic installation 10 also comprises voltage check device 160.Voltage check device 160 is coupled between high-tension battery group 120 and the ADC172 of master chip 170, in order to detect supply voltage V
supplymagnitude of voltage and the detection signal S of output reflection testing result
sen.The ADC172 of master chip 170 is according to detection signal S
senexport corresponding control signal S
ccontrol the switching device 134 of high-tension battery power-supplying circuit 130.In a specific embodiment, voltage check device 160 comprises the first resistor R
1and the second resistor R
2, wherein the first resistor R
1with the second resistor R
2series winding.Voltage check device 160 is at the first resistor R
1with the second resistor R
2tandem node output detection signal S
sen.
In a specific embodiment, master chip 170 can comprise this voltage check device 160.Or in some specific embodiment, high-tension battery power-supplying circuit 130 comprises voltage check device 160 and has and the control device of ADC172 identical function.The foregoing is only the use of demonstration, be not used for limiting the present invention, various possible compound modes neither depart from the scope of high-tension battery power-supplying circuit 130 of the present invention.
Fig. 2 is the system schematic that shows the described according to a further embodiment of the invention electronic installation with high-tension battery power-supplying circuit 230 20.The high-tension battery power-supplying circuit 230 of Fig. 2 further discloses the circuit framework of the switching device 134 of the high-tension battery power-supplying circuit 130 of Fig. 1.
High-tension battery group 120 is coupled to first node n
1, and by first node n
1output supply voltage V
supplyto high-tension battery power-supplying circuit 230 and by first node n
1supply voltage V is provided
supplyto high-pressure installation 150.Non-high-pressure installation 140 is coupled to Section Point n
2, and by Section Point n
2the voltage that reception high-tension battery power-supplying circuit 230 is exported is as the operating voltage of non-high-pressure installation 230.High-pressure installation 150 is coupled to first node n
1, and by first node n
1directly receive supply voltage V
supplyusing the operating voltage as high-pressure installation 150.
In the present embodiment, switching device 134 comprises the first sub-switching device SW
1and the second sub-switching device SW
2.The first sub-switching device SW
1be coupled to first node n
1with Section Point n
2between, and have and be coupled to the 4th node n
4control end.The second sub-switching device SW
2be coupled to the 4th node n
4with reference node n
refbetween, and have and be coupled to the 3rd node n
3control end.
One of in a specific embodiment, high-tension battery power-supplying circuit 230 also can comprise voltage check device 160 and control device 270, or both, wherein control device 270 can be contained in the master chip 170 of Fig. 1.
Voltage check device 160 comprises the first resistor R
1and the second resistor R
2.The first resistor R
1be coupled to first node n
1with the 5th node n
5between.The second resistor R
2be coupled to the 5th node n
5and reference node n
refbetween, wherein voltage check device 160 is by the 5th node n
5output detection signal S
sen.Control device 272 is coupled to the 5th node n
5with the 3rd node n
3between, wherein control device 272 is from the 5th node n
5receive detection signal S
sen, and export control signal S
cvia the 3rd node n
3to the second sub-switching device SW
2control end.
Voltage check device 160 is in order to detect supply voltage V
supplymagnitude of voltage and at the 5th node n
5the detection signal S of output reflection testing result
sen.As detection signal S
senpoint out to supply voltage V
supplymagnitude of voltage, for example 4.35V, is greater than critical voltage value, for example when 4.2V, control device 272 is exported control signal S
cmake the second sub-switching device SW
2close, and then make the first sub-switching device SW
1close.Based on above-mentioned connection, supply voltage V
supplyby dropping equipment 132 step-downs, the supply voltage V after step-down
supplyas the operating voltage of non-high-pressure installation 140, the wherein supply voltage V after step-down
supplymagnitude of voltage be for example 4.2V.By this mode, high-tension battery power-supplying circuit 130 can protect non-high-pressure installation 140 to avoid receiving high voltage.
On the contrary, as detection signal S
senpoint out to supply voltage V
supplymagnitude of voltage, for example 4V, is less than critical voltage value, for example when 4.2V, control device 272 is exported corresponding detection signal S
sencontrol signal S
cthe sub-switching device SW of conducting second
2, and then the sub-switching device SW of conducting first
1.Based on above-mentioned connection, supply voltage V
supplyby the first sub-switching device SW
1directly export the operating voltage of non-high-pressure installation 140 as non-high-pressure installation 140 to.By this mode, high-tension battery power-supplying circuit 130 can promote the power utilization efficiency of high-tension battery group 120.Should be noted, as the first sub-switching device SW
1when conducting, the first sub-switching device SW
1can not produce in essence pressure drop.For instance, the first sub-switching device SW
1the magnitude of voltage of the supply voltage receiving is 4V, the first sub-switching device SW
1the magnitude of voltage of output is also 4V.
In a specific embodiment, dropping equipment 132 is Schottky diode, and the anode of Schottky diode is coupled to first node n
1and the negative electrode of Schottky diode is coupled to Section Point n
2.Schottky diode can produce less pressure drop, and for instance, Schottky diode makes to supply voltage V
suuplymagnitude of voltage be down to 4.2V from 4.35V.The first sub-switching device SW
1be a field-effect transistor, the grid of field-effect transistor is coupled to the 4th node n
4.The second sub-switching device SW
2be a bipolar transistor, the base stage of bipolar transistor is coupled to the 3rd node n
3.In a specific embodiment, field-effect transistor is PMOS transistor, and the transistorized source electrode of PMOS is coupled to first node n
1, the transistorized drain electrode of PMOS is coupled to Section Point n
2, the transistorized grid of PMOS is coupled to the 4th node n
4; Bipolar transistor is bipolar npn transistor, and the transistorized emitter-base bandgap grading of bipolar npn is coupled to reference node n
ref, bipolar transistor collector electrode be coupled to the 4th node n
4, bipolar transistor base stage be coupled to the 3rd node n
3.
In a specific embodiment, high-tension battery power-supplying circuit 230 also comprises the 3rd resistor R
3and the 4th resistor R
4.The 3rd resistor R
3be coupled to first node n
1and the 4th node n
4between.The 4th resistor R
4be coupled to the 3rd node n
3and between the transistorized base stage of bipolar npn.
In above-mentioned specific embodiment, as detection signal S
senpoint out to supply voltage V
supplymagnitude of voltage, for example 4.35V, is greater than critical voltage value, for example when 4.2V, control device 272 is exported control signal S
cfor low logic electric potential signal, thus the second sub-switching device SW
2not conducting of bipolar transistor, and then make the first sub-switching device SW
1pMOS transistor close; Supply voltage V
supplyfrom first node n
1be transferred to Section Point n by dropping equipment 132 Schottky diodes
2, Schottky diode can produce less pressure drop, thereby, make to supply voltage V
suuplymagnitude of voltage be down to 4.2V from 4.35V.As detection signal S
senpoint out to supply voltage V
supplymagnitude of voltage, for example 4V, is less than critical voltage value, for example when 4.2V, control device 272 is exported control signal S
cfor high logic electric potential signal, thus the second sub-switching device SW
2bipolar transistor conducting, and then make the first sub-switching device SW
1pMOS transistor turns, like this, supply voltage V
supplycan not be transferred to Section Point n from dropping equipment 132 Schottky diodes that produce pressure drop
2, but path by complete conducting is via the 3rd node n
2, the second sub-switching device SW
2, the 4th node n
4, the first sub-switching device SW
1, Section Point n
2, be transferred to non-high-pressure installation 140.
Another embodiment of the present invention proposes a kind of high-tension battery method for controlling power supply.High-tension battery method for controlling power supply comprises the supply voltage V that detection high-tension battery group 120 provides
supplymagnitude of voltage.High-tension battery method for controlling power supply also comprises as supply voltage V
supplymagnitude of voltage, be for example 4.35V, be greater than a critical voltage value, for example, while being 4.2V, step-down supply voltage V
supplyby the supply voltage V after step-down
supplyas the operating voltage of non-high-pressure installation 140.As supply voltage V
supplymagnitude of voltage, be for example 4.0V, be less than critical voltage value, for example, while being 4.2V, directly will supply voltage V
supplyas the operating voltage of non-high-pressure installation 140.
Above-described high-tension battery power-supplying circuit 130 and 230 and high-tension battery method for controlling power supply, is not merely able to avoid non-high-pressure installation to receive high voltage, can promote the power utilization efficiency of high-tension battery group yet.
The characteristic of several embodiment described in aforementioned content summary, makes those skilled in the art can understand better concept of the present disclosure.Those skilled in the art should be able to realize use that they can be immediately of the present disclosure open as benchmark to design or to revise other programs and structure, complete same use and/or reach the same advantage at this embodiment that introduces.The structure that those skilled in the art should be able to understand similar equivalence does not depart from spirit of the present disclosure and scope, and they can have multiple change, replacement and selection and not depart from spirit of the present disclosure and scope in this.
Claims (10)
1. a high-tension battery power-supplying circuit, is coupled between high-tension battery group and non-high voltage device, and this high-tension battery power-supplying circuit comprises:
Dropping equipment, is coupled between this high-tension battery group and this non-high-pressure installation;
Switching device, is coupled between this high-tension battery group and this non-high-pressure installation; And
Control device, this switching device of magnitude of voltage control of the supply voltage providing according to this high-tension battery group, wherein
In the time that the magnitude of voltage of this supply voltage is greater than critical voltage value, this this switching device of not conducting of control device, makes this supply voltage by this dropping equipment step-down, and this supply voltage after step-down is as the operating voltage of this non-high-pressure installation; And
In the time that the magnitude of voltage of this supply voltage is less than this critical voltage value, this this switching device of control device conducting, makes this supply voltage directly as the operating voltage of this non-high-pressure installation.
2. high-tension battery power-supplying circuit according to claim 1, also comprises:
Voltage check device, be coupled between this high-tension battery group and this control device, in order to detect the magnitude of voltage of this supply voltage the detection signal of output reflection testing result, and this control device is according to this switching device of this this high-tension battery power-supplying circuit of detection signal control.
3. high-tension battery power-supplying circuit according to claim 2, wherein,
This high-tension battery group, is coupled to first node;
This non-high-pressure installation, is coupled to Section Point;
This switching device, comprising:
The first sub-switching device, is coupled between this first node and this Section Point, and has the control end that is coupled to the 4th node; And
The second sub-switching device, is coupled between the 4th node and reference node, and has the control end that is coupled to the 3rd node;
This voltage check device, comprising:
The first resistor, is coupled between this first node and one the 5th node; And
The second resistor, is coupled between the 5th node and this reference node; Wherein this voltage check device is exported this detection signal by the 5th node; And
This control device, is coupled between the 5th node and the 3rd node, and wherein this control device outputs control signals to the control end of this second sub-switching device;
In the time that this detection signal points out that the magnitude of voltage of this supply voltage is greater than this critical voltage value, this second sub-switching device of this not conducting of control signal, and then make this not conducting of the first sub-switching device; And
In the time that this detection signal points out that the magnitude of voltage of this supply voltage is less than this critical voltage value, this second sub-switching device of this control signal conducting, and then make this first sub-switching device conducting.
4. high-tension battery power-supplying circuit according to claim 3, wherein,
This dropping equipment is Schottky diode, and the negative electrode that the anode of this Schottky diode is coupled to this first node and this Schottky diode is coupled to this Section Point;
This first sub-switching device is field-effect transistor, and the grid of this field-effect transistor is coupled to the 4th node; And
This second sub-switching device is bipolar transistor, and the base stage of this bipolar transistor is coupled to the 3rd node.
5. high-tension battery power-supplying circuit according to claim 4, wherein this field-effect transistor is that PMOS transistor and this bipolar transistor are bipolar npn transistor.
6. a high-tension battery method for controlling power supply, comprising:
The magnitude of voltage of the supply voltage that detection high-tension battery group provides;
In the time that the magnitude of voltage of this supply voltage is greater than critical voltage value, this supply voltage of step-down the operating voltage using this supply voltage after step-down as non-high-pressure installation;
In the time that the magnitude of voltage of this supply voltage is less than this critical voltage value, the directly operating voltage using this supply voltage as this non-high-pressure installation.
7. high-tension battery method for controlling power supply according to claim 6, also comprises:
Detect the magnitude of voltage of this supply voltage and export the detection signal of corresponding testing result by the voltage check device of this high-tension battery power-supplying circuit; And
Control device by high-tension battery power-supplying circuit is according to the switching device of this high-tension battery power-supplying circuit of detection signal control, wherein
In the time that the magnitude of voltage of this supply voltage is greater than critical voltage value, this this switching device of not conducting of control device, make this supply voltage by the dropping equipment step-down of this high-tension battery power-supplying circuit, this supply voltage after step-down is as the operating voltage of this non-high-pressure installation; And
In the time that the magnitude of voltage of this supply voltage is less than this critical voltage value, this this switching device of control device conducting, makes this supply voltage directly as the operating voltage of this non-high-pressure installation.
8. high-tension battery method for controlling power supply according to claim 7, also comprises:
The first resistor and the second resistor by this voltage check device are exported this detection signal; And
By the output of this control device to the second sub-switching device that controls signal to this switching device that should detection signal, wherein
In the time that this detection signal points out that the magnitude of voltage of this supply voltage is greater than this critical voltage value, this second sub-switching device of this not conducting of control signal, and then make the first not conducting of sub-switching device of this switching device; And
In the time that this detection signal points out that the magnitude of voltage of this supply voltage is less than this critical voltage value, this second sub-switching device of this control signal conducting, and then make this first sub-switching device conducting.
9. high-tension battery method for controlling power supply according to claim 8, wherein this dropping equipment is that Schottky diode, this first sub-switching device are that field-effect transistor, this second sub-switching device are bipolar transistor.
10. high-tension battery method for controlling power supply according to claim 9, wherein this field-effect transistor is that PMOS transistor and this bipolar transistor are bipolar npn transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410269767.4A CN104124731A (en) | 2014-06-17 | 2014-06-17 | High-voltage battery power supply control circuit and high-voltage battery power supply control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410269767.4A CN104124731A (en) | 2014-06-17 | 2014-06-17 | High-voltage battery power supply control circuit and high-voltage battery power supply control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104124731A true CN104124731A (en) | 2014-10-29 |
Family
ID=51770042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410269767.4A Pending CN104124731A (en) | 2014-06-17 | 2014-06-17 | High-voltage battery power supply control circuit and high-voltage battery power supply control method |
Country Status (1)
| Country | Link |
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| CN (1) | CN104124731A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505698A (en) * | 2017-01-03 | 2017-03-15 | 青岛海信移动通信技术股份有限公司 | Method of supplying power to and electric supply installation |
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| CN106505698A (en) * | 2017-01-03 | 2017-03-15 | 青岛海信移动通信技术股份有限公司 | Method of supplying power to and electric supply installation |
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