CN113381483A - Multi-input single-output intelligent selection power supply circuit - Google Patents

Multi-input single-output intelligent selection power supply circuit Download PDF

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Publication number
CN113381483A
CN113381483A CN202110776277.3A CN202110776277A CN113381483A CN 113381483 A CN113381483 A CN 113381483A CN 202110776277 A CN202110776277 A CN 202110776277A CN 113381483 A CN113381483 A CN 113381483A
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power supply
output
input
voltage
selector
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CN113381483B (en
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宋宇
陈立新
熊海峰
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Nanjing Taisi Microelectronics Co ltd
Shanghai Taisi Microelectronics Co ltd
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Nanjing Taisi Microelectronics Co ltd
Shanghai Taisi Microelectronics Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a multi-channel input single-channel output intelligent selection power supply circuit, which comprises: the power supply system comprises a plurality of power supply ends, a highest power supply generation module, a signal detection module and a priority selection output module, wherein the plurality of power supply ends comprise at least 2 power supply input ends, the plurality of power supply ends comprise one or more power supply ends, the highest power supply generation module comprises at least one high power supply selector composed of CMOS (complementary metal oxide semiconductor), the forward input end and the reverse input end of the high power supply selector are both coupled with the plurality of power supply ends, and the high power supply selector outputs higher voltage after comparing the voltages of the two power supply input ends; the combined type multi-power supply system can be a wired quick charging end, a wired common charging end, a wireless charging end, a battery charging end and other different power supply modes, the power supply ends of different modes are selected according to actual conditions, and application requirements of different systems on a chip can be met.

Description

Multi-input single-output intelligent selection power supply circuit
Technical Field
The invention particularly relates to a multi-input single-output intelligent selection power supply circuit, and belongs to the technical field of charging.
Background
The power supply circuit is widely applied to intelligent equipment of a mobile terminal, the existing power supply technology is diversified, for example, the power supply of an internal lithium battery is carried out, external wired charging and wireless charging are carried out, along with the diversification of the charging mode of the mobile terminal and the popularization of handheld equipment, the intelligent equipment is required to support various charging modes, and when a multi-path power supply is used for charging the mobile terminal, particularly the intelligent equipment (such as a mobile phone, a tablet computer and the like), the mobile terminal needs to select a proper voltage as a working power supply.
The simple two-way selection power supply selection scheme adopted in the current market cannot meet the charging requirement of the mobile terminal, and the prior art needs to be reformed urgently.
Disclosure of Invention
Aiming at the defects in the prior art, the embodiment of the invention provides a multi-input single-output intelligent selection power supply circuit.
In order to achieve the purpose, the embodiment of the invention adopts the following technical scheme: a multiple input single output intelligent selection power supply circuit comprises: the device comprises a plurality of power supply ends, a highest power supply generation module, a signal detection module and a priority selection output module;
the multi-path power supply end comprises at least 2 paths of power supply input ends, and the multi-path power supply end comprises one or more power supply ends which can be one or more of a wired quick charging end, a wired common charging end, a wireless charging end, a battery charging end and other power supply modes in a combined mode; the power supply terminals in different modes are selected according to actual conditions, and the application requirements of different SOCs (system on chip) can be met.
The highest power supply generation module comprises at least one high power supply selector composed of CMOS, and a forward input end and a reverse input end of the high power supply selector are both coupled with a plurality of power supply ends; the number of the high power supply selectors is one less than that of the power supply input ends of the multi-path power supply ends;
preferably, each high power supply selector can load two power supply ends, each high power supply selector outputs higher voltage after comparing the voltages of the two power supply input ends,
preferably, the output end of the high power supply selector is coupled to the input end of the next-stage high power supply selector, when multiple power supply input ends exist, each high power supply selector outputs a higher voltage of the two power supply input ends, the higher voltage is input to the input end of the next-stage high power supply selector, and the voltage output by the last-stage high power supply selector is a power supply for the modules in the system.
The signal detection module comprises an overvoltage detection module (OVP) and an undervoltage detection module (UVLO), and each path of power supply end of the multiple paths of power supply ends is coupled with one signal detection module and used for detecting each path of power supply end of the multiple paths of power supply ends, so that voltage undervoltage and overvoltage input by the multiple paths of power supply ends are prevented from damaging subsequent electronic devices.
The priority selection output module includes: the logic control module comprises a low-voltage power supply (LDO _ DIG) of the voltage regulator, a storage unit (register) and a high-voltage LATCH (LATCH);
preferably, the logic control module includes: the power supply circuit comprises at least 2 switch control sources and a LOGIC control unit (LOGIC) formed by combining at least one NAND gate, at least one NOR gate and at least one inverter, wherein the switch control sources are coupled with a plurality of power supply ends, and the number of the switch control sources is equal to that of power supply input ends of the plurality of power supply ends;
preferably, the logic control unit is arranged at the output end of the highest power generation module, the output end of the highest power generation module is loaded with a low power consumption reference voltage LVREF to provide a reference voltage for the LDO _ DIG and the overvoltage detection module and the undervoltage detection module, the logic control unit is coupled to the switch control source, and the logic control unit generates a control signal of the switch control source based on detection of each of the overvoltage detection module and the undervoltage detection module of the multiple power supply terminals to control voltage output of the output switch control source;
preferably, the low-voltage power supply of the voltage stabilizer is arranged at the output end of the switch control source, and the low-voltage power supply of the voltage stabilizer is coupled with the storage unit.
Preferably, the output end of the priority selection output module is coupled to a power supply module of the mobile terminal, and if only one of the power supply input ends of the multiple power supply ends supplies power normally, the priority selection output module undoubtedly uses the charging mode of the power supply input end as the power supply end of the mobile terminal; and if more than 2 paths of power supply terminals are normal, the priority selection output module takes the path with the highest priority as the power supply terminal of the mobile terminal.
The invention has the following effects:
(1) the invention is provided with a plurality of paths of power supply ends, including at least 2 paths of power supply input ends, and including a plurality of power supply ends, which can be a wired quick charging end, a wired common charging end, a wireless charging end and a battery charging end, wherein the power supply ends in different modes are selected according to actual conditions, so that the application requirements of different SOC (system on chip) can be met;
(2) the invention also has the highest power supply generation module, when there are multiple power supply input ends, the high power supply selector in the highest power supply generation module outputs the higher voltage in two power supply input ends, and then inputs the higher voltage to the input end of the next-stage high power supply selector, the voltage output by the last-stage high power supply selector is used as the highest power supply voltage of the module in the system;
(3) the invention is also provided with a signal detection module for detecting the power supply end of each path of the multi-path power supply ends, thereby avoiding the voltage undervoltage and overvoltage input by the multi-path power supply ends from damaging subsequent electronic devices;
(4) the invention is also provided with a priority selection output module, and selects which path of voltage to output as the system power supply voltage according to the judgment of the logic control unit, thereby effectively solving the problem that the simple two-path selection power supply selection scheme adopted in the current market can not meet the charging requirement of the mobile terminal.
Drawings
FIG. 1 is a schematic circuit diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of an internal circuit of the highest power generating module according to the present invention;
FIG. 3 is a circuit diagram of the logic control module according to the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, the present invention provides an alternative embodiment of a multiple-input single-output intelligent selective power supply circuit, including: the device comprises a plurality of power supply ends, a highest power supply generation module, a signal detection module and a priority selection output module;
the multi-path power supply end comprises at least 2 paths of power supply input ends, and the multi-path power supply end comprises one or more power supply ends which can be one or more of a wired quick charging end, a wired common charging end, a wireless charging end, a battery charging end and other power supply modes in a combined mode; different power supply terminals are selected according to actual conditions, so that the application requirements of different SOCs (system on chip) can be met;
for example, as an alternative embodiment of the present invention, there are 4 power input terminals VIN1, VIN2, VIN3 and VIN4, and four charging manners, namely a wired fast charging terminal, a wired normal charging terminal, a wireless charging terminal and a battery charging terminal are taken as examples, the 4 power input terminals may select one of the wired fast charging terminal, the wired normal charging terminal, the wireless charging terminal and the battery charging terminal, or may select two or three power supply manners formed by randomly combining the two or more power supply modes, or of course, the power supply terminals of each path may select different power supply manners among the wired fast charging terminal, the wired normal charging terminal, the wireless charging terminal and the battery charging terminal, and the alternative embodiment effectively solves the problem of a single power supply manner of two-path power supply in the market.
Referring to fig. 2, the maximum power generating module includes at least one high power selector made of CMOS, the high power selector is a circuit outputting the highest voltage based on two power inputs of a comparator (but not limited to a certain comparator) and a PMOS switch, and a forward input terminal and a reverse input terminal of the high power selector are both coupled to multiple power supply terminals, the number of the high power selectors is one less than the number of the power input terminals of the multiple power supply terminals, each high power selector can load the two power supply terminals, each high power selector compares the voltages of the two power input terminals and outputs the higher voltage, an output terminal of the high power selector is coupled to an input terminal of a next high power selector, and when the multiple power input terminals exist, each high power selector outputs the higher voltage of the two power input terminals, and inputs the higher voltage to the input terminal of the next high power selector, the voltage output by the high power selector of the last stage is used as the supply voltage of the system module;
for example, as shown in fig. 2, as an alternative embodiment of the present invention, there are 4 power input terminals VIN1, VIN2, VIN3 and VIN4, 3 high power selectors COMP1, COMP2 and COMP3 are required, the input terminal of the high power selector COMP1 is loaded with VIN1 and VIN2, the input terminal of the high power selector COMP2 is loaded with VIN3 and VIN4, the high power selector COMP1 selects the highest voltage VINA by comparing VIN1 and VIN2, the high power selector COMP2 selects the highest voltage VINB by comparing 3 and VIN4, and VINA and VINB are loaded to the input terminal of the high power selector COMP3, the high power selector COMP3 finally selects the highest voltage CTL _ PWR as the highest output voltage of the system to supply the modules in the system while ensuring that the PMOS of the switch control source does not leak power, and when there is no power input terminal.
Referring to fig. 1, the signal detection module includes an overvoltage detection module and an undervoltage detection module, and each of the multiple power supply terminals is coupled to a signal detection module for detecting each of the multiple power supply terminals, so as to prevent the undervoltage and overvoltage input by the multiple power supply terminals from damaging subsequent electronic devices.
Referring to fig. 1, the priority selection output module includes: the logic control module comprises a low-voltage power supply (LDO _ DIG) of the voltage regulator, a storage unit (register) and a high-voltage LATCH (LATCH);
referring to fig. 3, the logic control module includes: the power supply circuit comprises at least 2 switch control sources and a LOGIC control unit (LOGIC) formed by combining at least one NAND gate, at least one NOR gate and at least one inverter, wherein the switch control sources are coupled with a plurality of power supply ends, adopt PMOS tubes and are controlled by the LOGIC control unit, and the number of the switch control sources is equal to that of the power supply input ends of the plurality of power supply ends;
for example, as an alternative embodiment of the present invention, there are 4 power input terminals VIN1, VIN2, VIN3 and VIN4, the switch control source should have 4 switch control sources SW1, SW2, SW3 and SW4 respectively coupled to the power input terminals VIN1, VIN2, VIN3 and VIN4 for outputting voltages of the corresponding paths.
Referring to fig. 1, the logic control unit is disposed at an output end of the highest power generation module, and a low power consumption reference voltage LVREF is loaded at the output end of the highest power generation module, so as to provide a reference voltage for the LDO _ DIG and the overvoltage detection module and the undervoltage detection module, and the logic control unit is coupled to the switch control source, and generates a control signal of the switch control source based on detection of each of the overvoltage detection module and the undervoltage detection module of the multi-path power supply terminal, so as to control voltage output of the output switch control source.
Referring to fig. 1, the low voltage power supply of the voltage regulator is provided at an output end of the switching control source, and the low voltage power supply of the voltage regulator is coupled to the storage unit, the storage unit stores a calibration code (code) of LVREF, the code can improve the accuracy of LVREF, the storage unit is coupled to the high voltage latch, the latch realizes that LVREF reads a default code to lock LVREF to a safe value when the LVREF is initially powered on, the LVREF reads the calibration code again after the storage unit is powered on, and selects which voltage to output as a power supply voltage of the system again according to the determination of the logic control unit, and the priority evaluation is processed by a logic circuit of the logic control unit;
for example, as an alternative embodiment of the present invention, the multi-channel power supply terminal has 4 power supply input terminals VIN1, VIN2, VIN3 and VIN4, and the priority is: VIN1 is greater than VIN2 is greater than VIN3 is greater than VIN4, and the priorities of the corresponding charging modes are respectively as follows: the wired fast charging is larger than the wired normal charging and is larger than the wireless charging and is larger than the battery charging, and the switch control sources SW1, SW2, SW3 and SW4 are respectively adopted to correspondingly control the 4-channel power input ends VIN1, VIN2, VIN3 and VIN4 as examples, specifically, in 4-channel input voltage, the effect of high voltage output is realized through priority processing, and the priority processing logic is described as follows:
if VIN1_ OVP = VIN1_ UVLO = "0", i.e., CTRL _ SW1= "0", SW1 is turned on, VIN1= VSYS _ PWR;
if VIN2_ OVP = VIN2_ UVLO = "0" and CTRL _ SW1= "1", SW2 is turned on, VIN2= VSYS _ PWR;
if VIN3_ OVP = VIN3_ UVLO = "0" and CTRL _ SW1= CTRL _ SW2= "1", SW3 is turned on, VIN3= VSYS _ PWR;
if VIN4_ OVP = VIN4_ UVLO = "0" and CTRL _ SW1= CTRL _ SW2= CTRL _ SW3= "1", SW4 is turned on, VIN4= VSYS _ PWR;
wherein VSYS _ PWR represents the output of the 4-way power input terminals VIN1, VIN2, VIN3 and VIN4 as the supply terminal voltage of the system;
"0" represents a logic low level, normal (no over-voltage or no under-voltage) state, low voltage at the power input, and also indicates turning on the switch control source; "1" represents a logic high level, an abnormal state (overvoltage or undervoltage), a high voltage at the power input, and also indicates turning off the switch control source;
the priority handling code described above can be understood as: if VIN1 is in a normal state, VIN1_ OVP = VIN1_ UVLO = "0", namely CTRL _ SW1= "0", and SW1 is turned on regardless of whether VIN 2-4 is in a normal state, VIN1= VSYS _ PWR, and a wired fast-charging mode is adopted;
if the VIN1 state is abnormal, the VIN2 is in a normal state, that is, VIN2_ OVP = VIN2_ UVLO = "0" and CTRL _ SW1= "1", no matter whether VIN 3-4 is in a normal state, SW2 is turned on, VIN2= VSYS _ PWR, and a wired normal charging mode is adopted;
if the VIN 1-2 state is abnormal, VIN3_ OVP = VIN3_ UVLO = "0" and CTRL _ SW1= CTRL _ SW2= "1", and SW3 is turned on regardless of whether VIN4 is in a normal state, then VIN3= VSYS _ PWR, and a wireless charging mode is adopted;
if VIN 1-3 are all abnormal, VIN4_ OVP = VIN4_ UVLO = "0" and CTRL _ SW1= CTRL _ SW2= CTRL _ SW3= "1", then SW4 is opened, VIN4= VSYS _ PWR, and a charging mode of battery charging is adopted.
For example, as an optional embodiment of the present invention, the multiple power supply terminals have 4 power input terminals VIN1, VIN2, VIN3, and VIN4, and respectively represent a wired fast charging terminal, a wired normal charging terminal, a wireless charging terminal, and a battery charging terminal, and as can be seen from the above embodiment, if only one of the multiple power input terminals is normally powered, the priority selection output module undoubtedly uses the charging mode of the power input terminal as the power supply terminal of the mobile terminal; and if more than 2 paths of power supply terminals are normal, the priority selection output module takes the path with the highest priority as the power supply terminal of the mobile terminal.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
It should be noted that the above-mentioned embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the protection scope of the present invention.

Claims (10)

1. A multi-input single-output intelligent selection power supply circuit is characterized by comprising: the device comprises a plurality of power supply ends, a highest power supply generation module, a signal detection module and a priority selection output module;
the multi-path power supply end comprises at least 2 paths of power supply input ends, and the multi-path power supply end comprises one or more power supply ends;
the highest power supply generation module comprises at least one high power supply selector composed of CMOS, a forward input end and a reverse input end of the high power supply selector are both coupled with a plurality of power supply ends, and the high power supply selector outputs higher voltage after comparing the voltages of the two power supply input ends;
the signal detection module includes: the overvoltage detection module and the undervoltage detection module are respectively coupled to each of the multiple paths of power supply ends and used for detecting the power supply end of each of the multiple paths of power supply ends;
the priority selection output module includes: the logic control module comprises a voltage stabilizer low-voltage power supply, a storage unit and a high-voltage latch;
the logic control module comprises: the control circuit comprises at least 2 switch control sources and a logic control unit formed by combining at least one NAND gate, at least one NOR gate and at least one inverter;
the output end of the priority selection output module is coupled with a power supply module of the mobile terminal;
the logic control unit is coupled to the switch control source, and generates a control signal of the switch control source after being detected based on the overvoltage detection module and the undervoltage detection module of each path of the multi-path power supply end, and the control signal is used for controlling the voltage output of the output switch control source.
2. The multiple-input single-output intelligent selection power supply circuit of claim 1, wherein: the power supply modes of the multiple power supply ends are one or more in a combined mode.
3. The multiple-input single-output intelligent selection power supply circuit of claim 1, wherein: the number of the high power supply selectors is one less than that of the power supply input ends of the multiple power supply ends, and each high power supply selector can load the two power supply ends.
4. The multiple-input single-output intelligent selection power supply circuit of claim 1, wherein: the output end of the high power supply selector is coupled with the input end of the next high power supply selector, when multiple power supply input ends exist, each high power supply selector outputs higher voltage in the two power supply input ends, the higher voltage is input to the input end of the next high power supply selector, and the voltage output by the last high power supply selector is used as the highest power supply voltage of the modules in the system.
5. The multiple-input single-output intelligent selection power supply circuit of claim 1, wherein: the switch control sources are coupled with the multiple power supply ends, the number of the switch control sources is equal to that of the power supply input ends of the multiple power supply ends, and each switch control source independently controls one power supply input end.
6. The multiple-input single-output intelligent selection power supply circuit of claim 1, wherein: the logic control unit is arranged at the output end of the highest power supply generation module, and the output end of the highest power supply generation module is loaded with a low-power-consumption reference voltage LVREF to provide reference voltages for the low-voltage power supply, the overvoltage detection module and the undervoltage detection module of the voltage stabilizer.
7. The multiple-input single-output intelligent selection power supply circuit of claim 1, wherein: when only one power supply input end of the multiple power supply ends supplies power normally, the priority selection output module takes the charging mode of the power supply input end as the power supply end of the mobile terminal; when more than 2 paths of power supply terminals in the plurality of paths of power supply terminals are normal, the priority selection output module takes the path with the highest priority as the power supply terminal of the mobile terminal.
8. The multiple-input single-output intelligent selection power supply circuit of claim 1, wherein: the low-voltage power supply of the voltage stabilizer is arranged at the output end of the switch control source and is coupled with the storage unit.
9. The multiple-input single-output intelligent selection power supply circuit of claim 8, wherein: the storage unit stores a calibration program of LVREF, and the program is used for improving the precision of LVREF.
10. The multiple-input single-output intelligent selection power supply circuit of claim 9, wherein: the storage unit is coupled with a high-voltage latch, the latch is used for reading a default program by initially powering on the LVREF and locking the LVREF at a safe value, and after the storage unit is powered on, the LVREF reads a calibration program again.
CN202110776277.3A 2021-07-09 2021-07-09 Multi-input single-output intelligent selection power supply circuit Active CN113381483B (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN114911664A (en) * 2022-07-18 2022-08-16 上海泰矽微电子有限公司 Multi-power supply switching SOC test method and system
CN114996072A (en) * 2022-07-18 2022-09-02 上海泰矽微电子有限公司 System for multichannel pressure signal automatic tracking detects
CN116937775A (en) * 2023-06-30 2023-10-24 辰芯半导体（深圳）有限公司 Multi-power supply selection circuit and charging equipment

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CN107064774A (en) * 2017-04-17 2017-08-18 成都卓创科微电子有限公司 Multichannel ratio of extreme values based on high-speed comparator array compared with positioning circuit, chip
CN209072151U (en) * 2018-12-27 2019-07-05 郑州春泉节能股份有限公司 Low-power consumption multi input power supply selection protection circuit and power supervisor
CN112968697A (en) * 2021-01-26 2021-06-15 北京源启先进微电子有限公司 Controller applied to multiplexer and multiplexer

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US20080164765A1 (en) * 2007-01-05 2008-07-10 Illegems Paul F Regulator Circuit with Multiple Supply Voltages
CN107064774A (en) * 2017-04-17 2017-08-18 成都卓创科微电子有限公司 Multichannel ratio of extreme values based on high-speed comparator array compared with positioning circuit, chip
CN209072151U (en) * 2018-12-27 2019-07-05 郑州春泉节能股份有限公司 Low-power consumption multi input power supply selection protection circuit and power supervisor
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Publication number Priority date Publication date Assignee Title
CN114911664A (en) * 2022-07-18 2022-08-16 上海泰矽微电子有限公司 Multi-power supply switching SOC test method and system
CN114996072A (en) * 2022-07-18 2022-09-02 上海泰矽微电子有限公司 System for multichannel pressure signal automatic tracking detects
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CN116937775A (en) * 2023-06-30 2023-10-24 辰芯半导体（深圳）有限公司 Multi-power supply selection circuit and charging equipment

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