CN113890345B - Central integrated boost power supply system applied to mobile phone tablet - Google Patents
Central integrated boost power supply system applied to mobile phone tablet Download PDFInfo
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- CN113890345B CN113890345B CN202111102782.6A CN202111102782A CN113890345B CN 113890345 B CN113890345 B CN 113890345B CN 202111102782 A CN202111102782 A CN 202111102782A CN 113890345 B CN113890345 B CN 113890345B
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- 239000003990 capacitor Substances 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 2
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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
- 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
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The application relates to a central integrated boost power supply system applied to a mobile phone panel, which relates to the technical field of electronic product boost circuits and comprises the following components: the power utilization module comprises a plurality of power utilization units, and the power utilization units are connected in parallel; the driving module is connected with a power supply BAT, is connected with the power utilization module, and is used for boosting the power supply voltage and providing the boosted voltage for the power utilization module; and the control module is connected with the driving module and is used for controlling the driving module to boost the power supply BAT. The application has the effects of saving the internal space of the electronic product, reducing the power loss and reducing the cost.
Description
Technical Field
The application relates to the technical field of electronic product booster circuits, in particular to a central integrated booster power supply system applied to a mobile phone panel.
Background
Typical cell phones and tablet versions are usually powered by a single lithium battery. The working voltage of a single lithium battery is between 3.0V and 4.2V (part of the battery can reach 4.4V), but functions of a plurality of modules such as a flash lamp, an audio power amplifier, a radio frequency amplifier, a port external power supply (typeC or micro USB) and the like can boost the lithium battery to about 5V. At present, the main scheme adopts a plurality of chips and a boosting scheme respectively.
For the related art, the inventor considers that a plurality of functional modules need to adopt a plurality of boosting subsystems to realize independent boosting control, but the method occupies more space, consumes excessive energy and has higher cost.
Disclosure of Invention
In order to save space and reduce energy consumption and thus reduce cost, the application provides a central integrated boost power supply system applied to a mobile phone panel.
The application provides a central integrated boost power supply system applied to a mobile phone panel, which adopts the following technical scheme:
a central integrated boost power system for a cell phone tablet, comprising:
the power utilization module comprises a plurality of power utilization units, and the power utilization units are connected in parallel;
The driving module is connected with a power supply BAT, is connected with the power utilization module, and is used for boosting the power supply voltage and providing the boosted voltage for the power utilization module;
And the control module is connected with the driving module and is used for controlling the driving module to boost the power supply BAT.
Through adopting above-mentioned technical scheme, control module control drive module carries out the processing of stepping up to power BAT, and drive module provides the voltage after stepping up to power module, and a plurality of parallelly connected power utilization units can obtain the voltage after stepping up simultaneously, have saved the space of placing a plurality of chips that step up, have reduced the energy consumption to the cost is reduced.
Optionally, the driving module comprises a driving unit, the driving unit is connected with the control module, the driving unit comprises a driving tube NMOS and a driving tube PMOS, and the control module controls the on and off of the gates of the driving tube NMOS and the driving tube PMOS by controlling the on and off of the gates of the driving tube NMOS and the driving tube PMOS.
By adopting the technical scheme, the control module controls the on and off of the drive tube NMOS and the drive tube PMOS by controlling the on and off of the gates of the drive tube NMOS and the drive tube PMOS, so that the drive module can realize the boosting operation of the power supply BAT.
Optionally, the driving module further includes an inductor L and a capacitor C, one end of the inductor L is connected to the power supply BAT, the other end of the inductor L is connected to both the drain of the driving tube NMOS and the drain of the driving tube PMOS, the source of the driving tube NMOS is grounded, the source of the driving tube PMOS is connected to one end of the capacitor C, the other end of the capacitor C is grounded, and the source of the driving tube PMOS is provided with a voltage output node VOUT.
By adopting the technical scheme, the inductor L, the capacitor C, the driving tube NMOS and the driving tube PMOS are matched to form a boost circuit, so that the boost operation of the power supply BAT can be realized.
Optionally, the power utilization units include a port power supply unit, a flash lamp application unit, an audio power amplifier unit and a radio frequency power supply unit, and the port power supply unit, the flash lamp application unit, the audio power amplifier unit and the radio frequency power supply unit are connected in parallel to the voltage output node VOUT.
Through adopting above-mentioned technical scheme, voltage output node VOUT is used for exporting the voltage after stepping up, and port power supply unit, flash light application unit, audio power amplifier unit and radio frequency power supply unit are parallelly connected, and voltage output node VOUT can provide high voltage to port power supply unit, flash light application unit, audio power amplifier unit and radio frequency power supply unit simultaneously, and is comparatively convenient.
Optionally, the port power supply unit includes a Load Switch, and one end of the Load Switch is connected to the voltage output node VOUT.
By adopting the technical scheme, the Load Switch protects the system through the integrated functions of reverse current protection, current limiting, undervoltage locking, overheat protection and the like.
Optionally, the flash lamp application unit includes a flash lamp and a constant current source for providing a stable current to the flash lamp, the flash lamp is a diode LEDa and a diode LEDb, the constant current source includes a constant current source CS1 and a constant current source CS2, input ends of the constant current source CS1 and the constant current source CS2 are connected with a voltage output node VOUT, an output end of the constant current source CS1 is connected with an anode of the diode LEDa, and an output end of the constant current source CS2 is connected with an anode of the diode LEDb.
By adopting the above technical scheme, the voltage output node VOUT provides voltage to the constant current source CS1 and the constant current source CS2, the constant current source CS1 and the constant current source CS2 provide stable current to the diode LEDa and the diode LEDb, and when the current required by the diode LEDa and the diode LEDb is larger, the voltage output node VOUT can ensure that the constant current source CS1 and the constant current source CS2 have sufficient voltage margin to provide stable current to the diode LEDa and the diode LEDb.
Optionally, the power consumption module further includes a low voltage unit, where the low voltage unit includes a constant current source CS3 and a constant current source CS4, the input ends of the constant current source CS3 and the constant current source CS4 are connected to the power BAT, the output end of the constant current source CS3 is connected to the anode of the diode LEDa, and the output end of the constant current source CS4 is connected to the anode of the diode LEDb.
By adopting the above technical scheme, when the current required by the diode LEDa and/or the diode LEDb is small, the current is switched to the constant current source CS3 and the constant current source CS4, and the constant current source CS3 and the constant current source CS4 can provide proper current for the diode LEDa and the diode LEDb, so that voltage loss is reduced.
Optionally, the radio frequency power supply unit is an LDO (integrated circuit voltage regulator), an input end of the LDO is connected to the voltage output node VOUT, and the LDO is configured to provide a stable current to the radio frequency power amplifier.
In summary, the present application includes at least one of the following beneficial technical effects:
1. The plurality of power utilization units are connected in parallel, and after the power supply BAT is boosted by the driving module, high voltage is simultaneously transmitted to the plurality of power utilization units through the voltage output node VOUT, so that the space is saved, and meanwhile, the cost is reduced;
2. the constant current source can be switched according to the requirements of the diode LEDa and the diode LEDb, thereby reducing the voltage loss.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a central integrated boost power system applied to a mobile phone tablet according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a Load Switch in a simple structure according to an embodiment of the present application.
Fig. 3 is a simplified schematic diagram of a typical 4G/5G rf power amplifier in accordance with an embodiment of the application.
Reference numerals illustrate:
1. A driving module; 11. a driving unit; 2. a control module; 3. an electricity utilization module; 31. a port power supply unit; 32. a flash application unit; 321. a low pressure unit; 33. an audio power amplifier unit; 34. and a radio frequency power supply unit.
Detailed Description
The application is described in further detail below with reference to fig. 1-3.
The embodiment of the application discloses a central integrated boost power supply system applied to a mobile phone panel, which comprises a driving module 1, a control module 2 and a power consumption module 3, wherein the power consumption module 3 comprises a plurality of power consumption units, the driving module 1 is connected with a power supply BAT, the driving module 1 is used for boosting the voltage of the power supply BAT and supplying power to the power consumption units, and the control module 2 realizes boost operation by controlling the driving module 1.
Referring to fig. 1, a driving module 1 includes a driving unit 11, an inductor L and a capacitor C, where the driving unit 11 includes a driving tube NMOS and a driving tube PMOS, and one end of the inductor L is connected to a power supply BAT, and in this embodiment, the power supply BAT is a battery in a mobile phone or a tablet. The other end of the inductor L is connected with drain electrodes of a driving tube NMOS and a driving tube PMOS respectively, gate electrodes of the driving tube NMOS and the driving tube PMOS are controlled by a control module 2, a source electrode of the driving tube NMOS is grounded, a source electrode of the driving tube PMOS is connected with one end of a capacitor C, the other end of the capacitor C is grounded, a voltage output node VOUT is arranged at the source electrode of the driving tube PMOS, and after the power supply voltage is subjected to boosting treatment of the driving module 1, high voltage is output at the voltage output node VOUT, and the voltage is generally 5V.
Specifically, the working process of the driving module 1 may be divided into two parts, a charging process and a discharging process, which are performed in a circulating manner, wherein the charging process is as follows: in the charging process, the driving tube NMOS is turned on, the PMOS is turned off, at this time, the power supply voltage passes through the inductor L, the driving tube PMOS and the capacitor C, at this time, along with the continuous charging of the inductor L, the current of the inductor L is linearly increased, and a certain amount of electric energy is stored in the inductor L until a certain time, and meanwhile, in the process, the capacitor C supplies electric energy to the electricity utilization module 3 (the capacitor C stores the electric energy stored in the last discharging process) so as to maintain the operation of the electricity utilization module 3.
The discharging process comprises the following steps: in the discharging process, the driving tube NMOS is turned off, and the driving tube PMOS is turned on, at this time, the current of the inductor L cannot be suddenly changed instantaneously, but gradually discharges slowly, and the inductor L can only charge the capacitor C through the driving tube PMOS and supply power to the power consumption module 3 because the inductor L can already supply voltage to the power consumption module 3 before charging the capacitor C, so that the voltage of the capacitor C increases, thereby realizing the boosting operation.
Referring to fig. 1, the control module 2 controls the on and off of the driving tube NMOS and the driving tube PMOS by controlling the on and off of the gates of the driving tube NMOS and the driving tube PMOS, and further controls the charging process and the discharging process of the driving module 1, so that the boosting operation of the power supply BAT can be implemented as required.
Referring to fig. 1, the power consumption unit is an electronic module requiring 5V voltage, and in this embodiment, the power consumption unit includes, but is not limited to, a port power supply unit 31, a flash lamp application unit 32, an audio power amplification unit 33, and a radio frequency power supply unit 34, where the port power supply unit 31, the flash lamp application unit 32, the audio power amplification unit 33, and the radio frequency power supply unit 34 are all connected in parallel, and the boosted voltage is provided by the driving module 1. The power utilization units are connected in parallel, the boosted voltage is shared, the integration level is high, the space is saved, and the cost is reduced.
Specifically, in this embodiment, the port power supply unit 31 is configured to supply power to two independent ports of typeC and micro USB, and one Load Switch needs to be configured for each independent port, one end of the Load Switch is connected to the voltage output node VOUT, and the driving module 1 supplies power to the port power supply unit 31 through the voltage output node VOUT.
More specifically, the Load Switch includes, but is not limited to, integrated functions such as reverse current protection, current limiting, under-voltage lockout, and overheat protection, to protect the system. A simple structural schematic diagram of a Load Switch is illustrated, and the functions of the Load Switch are briefly described below with reference to fig. 2:
The reverse current protection function will prevent current from flowing from the Vout pin to the Vin pin, and if this is not the case, current may flow from the Vout pin to the Vin pin when the voltage across Vout is higher than the voltage across Vin due to the diode drop. Thus, reverse current blocking may benefit certain applications, such as power supply multiplexer applications where current should not flow from Vout to Vin. There are many different ways to achieve reverse current protection. In some cases, the device (e.g., TPS 22912) will monitor the voltage on the Vin and Vout pins, and when this differential voltage exceeds a certain threshold, the switch will be disabled while the body diode is turned off to prevent reverse current to Vin from occurring. Some devices (e.g., TPS 22963C) have reverse current protection only when disabled.
The current limiting function will limit the amount of current that the load switch outputs, which will ensure that the external circuit does not draw excessive current. If the current is not limited, the external circuitry may cause the host system to cease operation. In the current limiting mode, the load switch provides continuous current until the switch current drops below the current limit.
Under-voltage lockout (UVLO) is used to turn off the device when Vin drops below a threshold to ensure that downstream circuitry is not damaged by the supply voltage being below a desired value.
The overheat protection function may disable the switch when the device temperature exceeds a threshold temperature. By virtue of this function, the device can be used as a safety switch that is turned off when a high temperature is detected.
Specifically, referring to fig. 1, the flash application unit 32 includes a flash lamp, which may be any type of photodiode such as a diode LED, and a constant current source for supplying a stable current to the flash lamp, and in this embodiment, the flash lamp is provided with two diodes, respectively denoted by a diode LEDa and a diode LEDb, and the cathodes of the diode LEDa and the diode LEDb are grounded. In this embodiment, two constant current sources are provided, namely, a constant current source CS1 and a constant current source CS2, wherein the input ends of the constant current source CS1 and the constant current source CS2 are connected with a voltage output node VOUT, the output end of the constant current source CS1 is connected with the anode of the diode LEDa, and the output end of the constant current source CS2 is connected with the anode of the diode LEDb. The input ends of the constant current source CS1 and the constant current source CS2 are connected with the output end of the driving module 1, and the driving module 1 is used for providing voltages for the constant current source CS1 and the constant current source CS2 so that the voltages of the input ends of the constant current source CS1 and the constant current source CS2 are higher than the anode voltages of the diode LEDa and the diode LEDb, thereby ensuring that the constant current source CS1 and the constant current source CS2 have enough voltage margin and providing stable currents for the diode LEDa and the diode LEDb.
More specifically, since the current required by the diode LEDa and the diode LEDb is small, a higher voltage is not required to be obtained from the driving module 1, in this embodiment, a low voltage unit 321 is further provided, the low voltage unit 321 includes a constant current source CS3 and a constant current source CS4, the output end of the constant current source CS3 is connected to the anode of the diode LEDa, the output end of the constant current source CS4 is connected to the anode of the diode LEDb, the input ends of the constant current source CS3 and the constant current source CS4 are connected to a power supply BAT, and the power supply BAT can be the same as the power supply BAT connected to the driving module 1, i.e., the power supply BAT does not need to boost voltage, and provides a lower voltage to the constant current source CS3 and the constant current source CS4 directly, so as to meet the operation requirements of the diode LEDa and the diode LEDb.
More specifically, diode voltage detection elements are disposed at the anodes of diode LEDa and diode LEDb, and when the current required by diode LEDa and diode LEDb is small, the diode voltage detection elements detect that the anode voltages of diode LEDa and diode LEDb are small, and at this time, the system switches to constant current source CS3 to provide a steady current for diode LEDa, constant current source CS4 to provide a steady current for diode LEDb, constant current source CS1 and constant current source CS2 are turned off; when the currents required by the diode LEDa and the diode LEDb are larger, the diode voltage detection element detects that the anode voltages of the diode LEDa and the diode LEDb are larger, at the moment, the system is switched to the constant current source CS1 to provide the stable current for the diode LEDa, the constant current source CS2 provides the stable current for the diode LEDb, and the constant current source CS3 and the constant current source CS4 are closed; when the current required by the diode LEDa is larger and the current required by the diode LEDb is smaller, the diode voltage detection element detects that the anode voltage of the diode LEDa is larger, and the diode voltage detection element detects that the anode voltage of the diode LEDb is smaller, at the moment, the system is switched to a constant current source CS1 to provide a stable current for the diode LEDa, the constant current source CS3 is turned off, the constant current source CS4 provides a stable current for the diode LEDb, and the constant current source CS2 is turned off; otherwise, the same is true. The addition of the low voltage unit 321 enables the flash application unit 32 to provide different voltages to different loads, thereby reducing the voltage loss of the diode LEDa or one of the branches of the smaller current in the diode LEDb and improving efficiency.
Specifically, in this embodiment, the audio power amplifier unit 33 employs a class D audio power amplifier, which is schematically shown as a structural schematic diagram of the class D audio power amplifier, and includes two NMOS driving tubes, two PMOS driving tubes, a speaker and a controller, where the controller is connected to the gates of the two NMOS driving tubes and the two PMOS driving tubes, for controlling the on and off of the gates, the sources of the two PMOS driving tubes are grounded, the drains of the two PMOS driving tubes are connected to the drains of the two NMOS driving tubes, two ends of the speaker are connected to the drains of the two NMOS driving tubes, the sources of the two NMOS driving tubes are connected to the voltage output node VOUT, and the driving module 1 supplies power to the audio power amplifier unit 33 through the voltage output node VOUT.
Specifically, fig. 3 shows a simple schematic of a typical 4G/5G rf power amplifier, where the power requirements of VCC1, VCC2 and VCC3 are all 5V, to provide more stable voltages to VCC1, VCC2 and VCC3 of the rf power amplifier, and the present application uses LDO as rf power supply unit 34, which is a new generation of integrated circuit voltage regulator, and is different from the three terminal voltage regulator in that LDO is a very low-consumption micro system on chip (SoC). The current main channel control circuit can be used for current main channel control, and hardware circuits such as a MOSFET (metal oxide semiconductor field effect transistor), a Schottky diode, a sampling resistor, a divider resistor and the like with extremely low on-line on-resistance are integrated on a chip, and the current main channel control circuit has the functions of overcurrent protection, overtemperature protection, a precise reference source, a differential amplifier, a delay and the like. The input end of the LDO is connected with the voltage output node VOUT, and the voltage output by the voltage output node VOUT is subjected to voltage stabilization treatment by the LDO to respectively provide stable 5V high voltage for the radio frequency power amplifier, so that the normal operation of the radio frequency power amplifier is facilitated.
The implementation principle of the central integrated boost power supply system applied to the mobile phone flat plate in the embodiment of the application is as follows: the plurality of electricity utilization units are connected in parallel, and after the power supply BAT is boosted by the driving module 1, high voltage is simultaneously conveyed to the plurality of electricity utilization units through the voltage output node VOUT, so that the space is saved, and meanwhile, the cost is reduced.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (3)
1. A central integrated boost power system for a cell phone tablet, comprising:
The power utilization module (3), the power utilization module (3) comprises a plurality of power utilization units, and the power utilization units are connected in parallel;
The power supply device comprises a driving module (1), wherein the driving module (1) is connected with a power supply BAT, the driving module (1) is connected with an electricity utilization module (3), and the driving module (1) is used for boosting the power supply voltage and providing the boosted voltage for the electricity utilization module (3);
The control module (2) is connected with the driving module (1), and the control module (2) is used for controlling the driving module (1) to perform boosting operation on the power supply BAT;
The driving module (1) comprises a driving unit (11), the driving unit (11) is connected with the control module (2), the driving unit (11) comprises a driving pipe NMOS and a driving pipe PMOS, and the control module (2) controls the on and off of the driving pipe NMOS and the driving pipe PMOS by controlling the on and off of the gates of the driving pipe NMOS and the driving pipe PMOS;
The driving module (1) further comprises an inductor L and a capacitor C, one end of the inductor L is connected with a power supply BAT, the other end of the inductor L is connected with the drain electrode of the driving tube NMOS and the drain electrode of the driving tube PMOS, the source electrode of the driving tube NMOS is grounded, the source electrode of the driving tube PMOS is connected with one end of the capacitor C, the other end of the capacitor C is grounded, and the source electrode of the driving tube PMOS is provided with a voltage output node VOUT;
the power utilization units comprise a port power supply unit (31), a flash lamp application unit (32), an audio power amplification unit (33) and a radio frequency power supply unit (34), wherein the port power supply unit (31), the flash lamp application unit (32), the audio power amplification unit (33) and the radio frequency power supply unit (34) are connected in parallel to a voltage output node VOUT;
The flash lamp application unit (32) comprises a flash lamp and a constant current source for providing stable current for the flash lamp, the flash lamp is a diode LEDa and a diode LEDb, cathodes of the diode LEDa and the diode LEDb are grounded, the constant current source comprises a constant current source CS1 and a constant current source CS2, input ends of the constant current source CS1 and the constant current source CS2 are connected with a voltage output node VOUT, an output end of the constant current source CS1 is connected with an anode of the diode LEDa, an output end of the constant current source CS2 is connected with an anode of the diode LEDb, input ends of the constant current source CS1 and the constant current source CS2 are connected with an output end of the driving module (1), and the driving module (1) is used for providing voltages for the constant current source CS1 and the constant current source CS2 so that the voltages of the input ends of the constant current source CS1 and the constant current source CS2 are higher than the voltages of the diode LEDa and the anode of the diode LEDb;
When the current required by the diode LEDa and the diode LEDb is smaller, a higher voltage is not required to be obtained from the driving module (1), the power utilization module (3) further comprises a low-voltage unit (321), the low-voltage unit (321) comprises a constant current source CS3 and a constant current source CS4, the input ends of the constant current source CS3 and the constant current source CS4 are connected with the power supply BAT, the output end of the constant current source CS3 is connected with the anode of the diode LEDa, the output end of the constant current source CS4 is connected with the anode of the diode LEDb, the power supply BAT is not required to be boosted, and lower voltage is directly provided for the constant current source CS3 and the constant current source CS4 so as to meet the operation requirements of the diode LEDa and the diode LEDb;
The anodes of the diode LEDa and the diode LEDb are respectively provided with a diode voltage detection element, when the currents required by the diode LEDa and the diode LEDb are smaller, the diode voltage detection element detects that the anode voltages of the diode LEDa and the diode LEDb are smaller, at this time, the system is switched to the constant current source CS3 to provide stable currents for the diode LEDa, the constant current source CS4 provides stable currents for the diode LEDb, the constant current source CS1 and the constant current source CS2 are closed, when the currents required by the diode LEDa and the diode LEDb are larger, the diode voltage detection element detects that the anode voltages of the diode LEDa and the diode LEDb are larger, at this time, the system is switched to the constant current source CS1 to provide stable currents for the diode LEDa, the constant current source CS2 provides stable currents for the diode LEDb, the constant current source CS3 and the constant current source CS4 are closed, when the currents required by the diode LEDa are larger, the diode voltage detection element detects that the anode voltages of the diode LEDa are larger, the constant current source CS1 and the constant current source CS2 is smaller, at this time, the system is switched to the constant current source CS3 is provided with stable currents for the diode 6295, and the system is switched to be closed.
2. The central integrated boost power supply system for a mobile phone panel according to claim 1, wherein the port power supply unit (31) comprises a Load Switch, and one end of the Load Switch is connected to the voltage output node VOUT.
3. The central integrated boost power system for mobile phone tablet according to claim 1, wherein the rf power supply unit (34) is an LDO (integrated circuit regulator), an input terminal of the LDO is connected to the voltage output node VOUT, and the LDO is configured to provide a stable current to the rf power amplifier.
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| CN202111102782.6A CN113890345B (en) | 2021-09-22 | 2021-09-22 | Central integrated boost power supply system applied to mobile phone tablet |
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| CN202111102782.6A CN113890345B (en) | 2021-09-22 | 2021-09-22 | Central integrated boost power supply system applied to mobile phone tablet |
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|---|---|
| CN113890345A (en) | 2022-01-04 |
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