CN109189195B - Frequent outage start-up circuit optimizing device of intelligent system - Google Patents
Frequent outage start-up circuit optimizing device of intelligent system Download PDFInfo
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Abstract
The application discloses an intelligent system frequent power-off startup circuit optimizing device, and relates to the field of startup control of electronic products; the problem of electronic product can't power on promptly start is solved, and technical scheme main points are: comprising the following steps: the trigger unit is coupled with the PMIC to receive the PMIC power-on signal and output a trigger signal; the control unit is coupled with external direct current to receive an external power-on signal and output a control signal; the switch unit is respectively coupled with the trigger unit to receive the trigger signal, the control unit to receive the control signal and output the switch signal; VCC_SYST is coupled to the switch unit to receive the switch signal and respond to the switch signal to start; the intelligent system frequent power-off starting circuit optimizing device provided by the application realizes the function that an electronic product is powered on and then started.
Description
Technical Field
The application relates to the field of electronic product startup control, in particular to an intelligent system frequent power-off startup circuit optimizing device.
Background
With the increasing popularity of electronic products, people are also increasingly free from products which bring much convenience to people.
A common PMIC (power management integrated circuit) in electronic products, when the PMIC supplies power to vcc_syst (central processing unit system), vcc_syst is directly turned on; since the properties of PMIC are: the PMIC is not disconnected in the case of vcc_syst power supply, and thus cannot be actually shut down in this case.
According to the above situation, this general PMIC cannot be actually turned off when the VCC50_syst is powered, but the vcc_syst is powered off from the battery POWER supply end, but the power_key needs to be pressed for about several hundred MS to 1S from the battery POWER supply end to be turned on, and many electronic products commonly used by customers just need the function of being powered on, that is, turned on, so that the requirements of customers cannot be met, and there is room for improvement.
Disclosure of Invention
The application aims to provide an intelligent system frequent power-off starting circuit optimizing device, which realizes the function of starting an electronic product when the electronic product is powered on.
The technical aim of the application is realized by the following technical scheme:
an intelligent system frequent power-off startup circuit optimizing device, comprising:
the trigger unit is coupled with the PMIC to receive the PMIC power-on signal and output a trigger signal;
the control unit is coupled with external direct current to receive an external power-on signal and output a control signal;
the switch unit is respectively coupled with the trigger unit to receive the trigger signal, the control unit to receive the control signal and output the switch signal; VCC_SYST is coupled to the switch unit to receive the switch signal and respond to the switch signal to start;
when the trigger unit receives the PMIC power-on signal, the trigger unit outputs a high-level trigger signal, otherwise, outputs a low-level trigger signal; when the control unit receives an external power-on signal, a high-level control signal is output, otherwise, a low-level control signal is output;
when the switch unit receives a low-level trigger signal and a high-level control signal, outputting a high-level switch signal, and starting VCC_SYST; otherwise, VCC_SYST is not started;
wherein the definition is: the PMIC is a power management integrated circuit and vcc_syst is a central processing unit system.
By adopting the technical scheme, once the trigger unit receives the PMIC power-on signal and outputs a high-level trigger signal and the control unit outputs a low-level signal, the VCC_SYST is started, namely once the trigger unit is powered on and the response time of the trigger unit is smaller than the time of the control unit outputting the high-level signal, the VCC_SYST realizes power-on immediately after power-on, and meets the requirement of customers on the power-on immediately-started function of electronic products.
The application is further provided with: the switch unit is a switch triode.
By adopting the technical scheme, the high-level signal and the low-level signal of the switch unit are output by utilizing the working cut-off and saturation characteristics of the switch triode, namely the cut-off and the conduction of the circuit.
The application is further provided with: the control unit includes:
the voltage reducing part is coupled with external direct current to receive external power-on signals and output voltage reducing signals;
the voltage reducing control part is coupled with the voltage reducing part to receive the voltage reducing signal and output a control signal;
when the voltage reducing part receives an external power-on signal and outputs a high-level voltage reducing signal, otherwise, outputting a low-level voltage reducing signal; when the step-down control part receives the step-down signal of high level, the step-down control part outputs the control signal of high level, otherwise, the step-down control part outputs the control signal of low level.
By adopting the technical scheme, under the condition of no battery, the voltage reducing part realizes the change of the voltage so as to adapt to the voltage value required by the current circuit; the step-down control part is matched with the step-down part to output high and low control signals of the control unit under the condition of responding to an external power-on signal.
The application is further provided with: the step-down part is a synchronous step-down converter.
By adopting the technical scheme, the synchronous buck converter is widely applied to the fields of electric appliances and electronics, has high conversion efficiency and small installation occupation volume, and is suitable for electronic products.
The application is further provided with: the step-down control section includes:
the step-down charging circuit is coupled to the step-down part to receive a step-down signal and respond to the step-down signal to output a control signal;
the step-down charging protection circuit is connected in series with the step-down charging circuit to prevent the step-down charging circuit from being burnt out.
By adopting the technical scheme, once the step-down charging circuit receives the high-level step-down signal, the step-down charging circuit immediately responds, and the response time is short; the step-down charging protection circuit prevents the problem that the branch circuit where the step-down charging circuit is located is connected reversely to burn out components.
The application is further provided with: the step-down charging protection circuit is a switching diode.
By adopting the technical scheme, the switching diode is a small high-speed switching diode; one switch is relatively rapid, and the function of circuit reverse connection prevention is realized by utilizing the unidirectional conductivity of the switch; the second is easy to obtain and low in cost.
The application is further provided with: the control unit includes:
the detection part is coupled with external direct current to receive an external power-on signal and is used for detecting external actions to output a detection signal;
the detection control part is coupled with the detection part to receive the detection signal and respond to the detection signal to output a control signal.
When the detection part receives an external power-on signal and detects external actions, a high-level detection signal is output, otherwise, a low-level detection signal is output; when the detection control unit receives the high-level detection signal, it outputs a high-level control signal, and otherwise, it outputs a low-level control signal.
By adopting the technical scheme, the detection control part immediately responds once receiving the external power-on signal and receiving the external action, and the detection control part is matched to output a high-level control signal to start a subsequent circuit.
The application is further provided with: the detection part is an acceleration sensor.
By adopting the technical scheme, the acceleration sensor has the characteristics of low power consumption and high precision; the volume of the portable handheld device is small, and the portable handheld device is suitable for portable handheld devices.
The application is further provided with: the detection control unit includes:
the detection charging circuit is coupled with the detection part to receive the detection signal and respond to the detection signal to output a control signal;
the detection charging protection circuit is connected in series with the detection charging circuit to prevent the detection charging circuit from being burnt out.
By adopting the technical scheme, once the detection charging circuit receives the high-level detection signal, the detection charging circuit immediately responds, and the response time is short; the detection charging protection circuit prevents the problem that the branch circuit where the detection charging circuit is located is connected reversely to burn out components.
The application is further provided with: the detection charging protection circuit is a switching diode.
By adopting the technical scheme, the switching diode is a small high-speed switching diode; one switch is relatively rapid, and the function of circuit reverse connection prevention is realized by utilizing the unidirectional conductivity of the switch; the second is easy to obtain and low in cost.
In summary, the application has the following beneficial effects: the function of powering on the electronic product, namely starting up, is realized, and the requirement of customers on the function of powering on the electronic product, namely starting up, is met.
Drawings
FIG. 1 is a schematic circuit diagram of a voltage step-down section according to a first embodiment;
FIG. 2 is a schematic circuit diagram of a buck control section and a trigger unit according to the first embodiment;
fig. 3 is a schematic circuit diagram of a control unit and a trigger unit in the second embodiment.
In the figure, 1, a trigger unit; 2. a control unit; 21. a step-down unit; 22. a step-down control unit; 221. a step-down charging circuit; 222. a step-down charge protection circuit; 23. a detection unit; 24. a detection control unit; 241. detecting a charging circuit; 242. detecting a charging protection circuit; 3. and a switching unit.
Detailed Description
The application is described in further detail below with reference to fig. 1-3.
Embodiment one:
referring to fig. 1 and 2, the device for optimizing a power-on circuit of an intelligent system with frequent power-off disclosed in this embodiment includes a trigger unit 1, a control unit 2, and a switch unit 3 coupled to the trigger unit 1 and the control unit 2, respectively.
The trigger unit 1 (not shown) is coupled to the PMIC to receive the PMIC power-on signal and output a trigger signal. The control unit 2 is coupled to the external direct current to receive the external power-on signal and output a control signal. The switch unit 3 is coupled to the trigger unit 1 to receive the trigger signal, and coupled to the control unit 2 to receive the control signal and output the switch signal; vcc_syst is coupled to the switching unit 3 to receive the switching signal and to turn on in response to the switching signal. Wherein the definition is: the PMIC is a power management integrated circuit and vcc_syst is a central processing unit system.
When the trigger unit 1 receives the PMIC power-on signal, the trigger unit outputs a high-level trigger signal, otherwise, the trigger unit outputs a low-level trigger signal; when the control unit 2 receives an external power-on signal, it outputs a high-level control signal, and otherwise, outputs a low-level control signal. When the switch unit 3 receives a low-level trigger signal and a high-level control signal, a high-level switch signal is output, and VCC_SYST is started; in contrast, VCC_SYST is not powered on.
Referring to fig. 1, the control unit 2 includes a step-down part 21 coupled to an external direct current to receive an external power-up signal and output a step-down signal, and a step-down control part 22 coupled to the step-down part 21 to receive the step-down signal and output a control signal. The buck control part 22 includes a buck charging circuit 221 coupled to the buck part 21 to receive the buck signal and output a control signal in response to the buck signal, and a buck charging protection circuit 222 connected in series to the buck charging circuit 221 to prevent the buck charging circuit 221 from being burned out.
The step-down unit 21 is a synchronous buck converter a, and the model number of the synchronous buck converter a is TPS54620. The buck charge protection circuit 222 is a switching diode D1, and the type of the switching diode D1 is 1N4148. The switching unit 3 is a switching triode Q1, the switching triode Q1 is an NPN triode, and the model is MMBT3904.
The 1 pin of the synchronous buck converter A is connected with one end of a resistor R1, the other end of the resistor R1 is connected with the ground, and the 2 pin, the 3 pin and the 15 pin of the synchronous buck converter A are all connected with the ground. The 4 feet and the 5 feet of the synchronous buck converter A are connected with external 12V direct current, the branches where the capacitors C1, C2, C3 and C4 are positioned are connected in parallel, one ends of the capacitors C1, C2, C3 and C4 are connected with the ground, the other ends of the capacitors C1, C2 and C3 are connected with the external 12V direct current, and the other ends of the capacitors C4 are respectively connected with the 6 feet of the synchronous buck converter A and the external 12V direct current; wherein the value of the capacitor C1 is 680uF, the value of the capacitor C2 is 10uF, the value of the capacitor C3 is 10uF, the value of the capacitor C4 is 0.1uF, and the resistance of the resistor R1 is 100K.
The 14 feet and the 10 feet of the synchronous buck converter A are empty, one end of each of the capacitors C6, C7 and C8 is connected with the ground, the other end of each of the capacitors C6 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the 8 feet of the synchronous buck converter A, the other end of each of the capacitors C7 is connected with the 8 feet of the synchronous buck converter A and the other end of the resistor R2, and the other end of each of the capacitors C8 is connected with the 9 feet of the synchronous buck converter A; the value of the capacitor C6 is 82uF, the value of the capacitor C7 is 0.01uF, the value of the capacitor C8 is 0.01uF, and the resistance of the resistor R2 is 1.62K.
The 13 feet of the synchronous buck converter A are connected with one end of the capacitor C5, and one end of the capacitor C5 is respectively connected with one end of the inductor L1, the 12 feet of the synchronous buck converter A and the 11 feet of the synchronous buck converter A. The other end of the inductor L1 is respectively connected with one end of a resistor R4, one end of a capacitor C9 and one end of a capacitor C10, the other end of the resistor R4 is respectively connected with one end of a resistor R3 and the 7 pin of the synchronous buck converter A, and the other end of the resistor R3 is connected with the ground. The other end of the capacitor C9 is respectively connected with the other end of the capacitor C10 and the ground; the value of the capacitor C5 is 0.1uF, the value of the capacitor C8 is 47uF, the value of the capacitor C9 is 220uF, the resistance of the resistor R2 is 41.2K, and the value of the inductor L1 is 3.6UH. Wherein the terminal in fig. 1 is the positive terminal of the external 12V dc, the terminal b in fig. 2 is the positive terminal of PMIC, and the terminal W in fig. 2 is the positive terminal of vcc_syst.
The anode of the switching diode D1 is connected with the VBAT+ end, the cathode of the switching diode D1 is respectively connected with one end of the resistor R9 and one end of the capacitor C12, and the other end of the capacitor C12 is connected with one end of the resistor R10.
When the synchronous buck converter A is connected with external 12V direct current to output a high-level buck signal, otherwise, the synchronous buck converter A outputs a low-level buck signal.
Referring to fig. 2, the trigger unit 1 includes a resistor R8 with a resistance value of 47K, a resistor R5 with a resistance value of 100K, a resistor R6 with a resistance value of 1K, a resistor R7 with a resistance value of 510K, a capacitor C11 with a value of 1uF, and a transistor Q1; the triode Q2 is an NPN triode, and the model of the triode Q2 is MMBT3904.
One end of a resistor R8 is connected with the positive electrode end of the power management integrated circuit, the other end of the resistor R8 is respectively connected with one end of a capacitor C11, one end of a resistor R5 and the base electrode of a triode Q1, and the other end of the capacitor C11, the other end of the resistor R5 and the emitter electrode of the triode Q1 are all connected with the ground. The collector of the triode Q1 is connected with one end of a resistor R6, the other end of the resistor R6 is respectively connected with the other end of a resistor R9, one end of a resistor R7 and the base of a switching triode Q2, the other end of the resistor R7 and the emitter of the switching triode Q2 are both connected with the ground, and the collector of the switching triode Q2 is connected with VCC_SYST.
The working principle of the embodiment is as follows: the direct current of external 12V is reduced to about 4.1V after passing through the synchronous buck converter A, the VBATT+ is electrified and charges the capacitor C12, and the base electrode of the switching triode Q1 is applied with a voltage, so that the collector electrode (namely the W end) of the switching triode Q1 is pulled down; once the PMIC is powered on, a voltage is applied to the base electrode of the triode Q2, the collector electrode of the triode Q2 is pulled down, the base electrode of the switching triode Q1 is pulled down, and the collector electrode (namely the W end) of the switching triode Q1 is restored to high voltage; therefore, the collector (i.e., the W terminal) of the switching transistor Q1 is pulled down for a time longer than the pressing time required for power-on, so as to realize vcc_syst power-on.
Embodiment two:
referring to fig. 3, the first embodiment is different from the second embodiment in that components in the control unit 2 of the first embodiment are replaced. The control unit 2 includes a detecting part 23 coupled to the external direct current to receive an external power-on signal and to detect an external motion to output a detection signal, and a detection control part 24 coupled to the detecting part 23 to receive the detection signal and to output a control signal in response to the detection signal. The detection control portion 24 includes a detection charging circuit 241 coupled to the detection portion 23 to receive the detection signal and output a control signal in response to the detection signal, and a detection charging protection circuit 242 connected in series to the detection charging circuit 241 to prevent the detection charging circuit 241 from being burned out.
The detection unit 23 is an acceleration sensor B, and the model of the acceleration sensor B is BMA250. The detecting charging protection circuit 242 is a switching diode D2, wherein the type of the switching diode D2 is 1N4148.
The 2 feet, the 12 feet and the 5 feet of the acceleration sensor B are empty; the 1 pin of the acceleration sensor B is connected with one end of a resistor R11, and the other end of the resistor R11 is connected with external 12V direct current. The 10 foot of the acceleration sensor B is connected with one end of a resistor R10, the other end of the resistor R10 is respectively connected with the 11 foot of the acceleration sensor B and the external 12V direct current, and the 3 foot of the acceleration sensor B is connected with the external 12V direct current.
The 7 pin of the acceleration sensor B is respectively connected with one end of the capacitor C14 and external 12V direct current, the 8 pin of the acceleration sensor B and the 9 pin of the acceleration sensor B are both connected with the ground, the other end of the capacitor C14 and one end of the capacitor C15 are both connected with the ground, and the other end of the capacitor C15 is connected with the external 12V direct current; in fig. 3, the c terminal, the d terminal, and the e terminal are all positive terminals of the external 12V dc power. Wherein, the resistance of the resistor R10 and the resistance of the resistor R10 are both 10K, the value of the capacitor C14 is 100nF, and the value of the capacitor C15 is 1uF.
When the acceleration sensor B is connected to the external 12V dc power and the acceleration sensor B detects the impact or vibration, a high-level detection signal is output, whereas a low-level detection signal is output.
The detection charging circuit 241 includes a capacitor C12, a capacitor C13, and a resistor R9. The 6 feet of the acceleration sensor B are respectively connected with the anode of the switch diode D2 and one end of the capacitor C12, the other end of the capacitor C12 is connected with the ground, the cathode of the switch diode D2 is respectively connected with one end of the capacitor C13 and one end of the resistor R9, the other end of the capacitor C13 is connected with the ground, the other end of the resistor R9 is respectively connected with the other end of the resistor R6, one end of the resistor R7 and the base of the switch triode Q1, wherein the value of the capacitor C12 is 10nF, and the value of the capacitor C13 is 1uF.
The working principle of the embodiment is as follows: the acceleration sensor B is connected with external 12V direct current, and when the acceleration sensor B detects collision or vibration, the base electrode of the switching triode Q1 is added with a voltage, so that the collector electrode (namely the W end) of the switching triode Q1 is pulled down; once the PMIC is powered on, a voltage is applied to the base electrode of the triode Q2, the collector electrode of the triode Q2 is pulled down, the base electrode of the switching triode Q1 is pulled down, and the collector electrode (namely the W end) of the switching triode Q1 is restored to high voltage; therefore, the collector (i.e., the W terminal) of the switching transistor Q1 is pulled down for a time longer than the pressing time required for power-on, so as to realize vcc_syst power-on.
The foregoing embodiments are only used to describe the technical scheme of the present application in detail, but the descriptions of the foregoing embodiments are only used to help understand the method and the core idea of the present application, and should not be construed as limiting the present application. Variations or alternatives, which are easily conceivable by those skilled in the art, are included in the scope of the present application.
Claims (5)
1. An intelligent system frequent power-off startup circuit optimizing device, which is characterized by comprising:
a trigger unit (1) coupled to the PMIC for receiving the PMIC power-on signal and outputting a trigger signal;
a control unit (2) coupled to the external direct current to receive an external power-on signal and output a control signal;
the switch unit (3) is respectively coupled with the trigger unit (1) to receive the trigger signal, the control unit (2) to receive the control signal and output the switch signal; VCC_SYST is coupled to the switch unit (3) to receive the switch signal and respond to the switch signal to start; the switch unit (3) is a switch triode;
when the trigger unit (1) receives the PMIC power-on signal, the trigger unit outputs a high-level trigger signal, and otherwise, outputs a low-level trigger signal; when the control unit (2) receives an external power-on signal, a high-level control signal is output, otherwise, a low-level control signal is output;
when the switch unit (3) receives a low-level trigger signal and a high-level control signal, outputting a high-level switch signal, and starting VCC_SYST; otherwise, VCC_SYST is not started;
wherein the definition is: PMIC is power management integrated circuit, VCC_SYST is central processing unit system;
the control unit (2) comprises:
a step-down unit (21) coupled to an external direct current to receive an external power-on signal and output a step-down signal;
a step-down control part (22) coupled to the step-down part (21) to receive the step-down signal and output a control signal;
when the voltage reducing part (21) receives an external power-on signal and outputs a high-level voltage reducing signal, otherwise, outputting a low-level voltage reducing signal; when the step-down control part (22) receives a step-down signal with a high level, the step-down control part outputs a control signal with a high level, otherwise, the step-down control part outputs a control signal with a low level;
the step-down control unit (22) comprises:
a step-down charging circuit (221) coupled to the step-down section (21) to receive a step-down signal and to output a control signal in response to the step-down signal;
and the step-down charging protection circuit (222) is connected in series with the step-down charging circuit (221) to prevent the step-down charging circuit (221) from being burnt out.
2. The intelligent system frequent power-off startup circuit optimization device according to claim 1, wherein: the step-down unit (21) is a synchronous step-down converter.
3. The intelligent system frequent power-off startup circuit optimization device according to claim 1, wherein: the step-down charge protection circuit (222) is a switching diode.
4. An intelligent system frequent power-off starting circuit optimizing device is characterized in that: comprising the following steps:
a trigger unit (1) coupled to the PMIC for receiving the PMIC power-on signal and outputting a trigger signal;
a control unit (2) coupled to the external direct current to receive an external power-on signal and output a control signal;
the switch unit (3) is respectively coupled with the trigger unit (1) to receive the trigger signal, the control unit (2) to receive the control signal and output the switch signal; VCC_SYST is coupled to the switch unit (3) to receive the switch signal and respond to the switch signal to start;
when the trigger unit (1) receives the PMIC power-on signal, the trigger unit outputs a high-level trigger signal, and otherwise, outputs a low-level trigger signal; when the control unit (2) receives an external power-on signal, a high-level control signal is output, otherwise, a low-level control signal is output;
when the switch unit (3) receives a low-level trigger signal and a high-level control signal, outputting a high-level switch signal, and starting VCC_SYST; otherwise, VCC_SYST is not started;
wherein the definition is: PMIC is power management integrated circuit, VCC_SYST is central processing unit system;
the control unit (2) comprises:
a detection part (23) coupled to the external direct current to receive an external power-on signal and for detecting an external action to output a detection signal; the detection part (23) is an acceleration sensor;
a detection control part (24) coupled to the detection part (23) to receive the detection signal and to output a control signal in response to the detection signal; the detection control unit (24) comprises:
a detection charging circuit (241) coupled to the detection portion (23) to receive the detection signal and to output a control signal in response to the detection signal;
a detection charging protection circuit (242) connected in series with the detection charging circuit (241) to prevent the detection charging circuit (241) from being burned out by reverse connection;
when the detection part (23) receives an external power-on signal and detects external action, a high-level detection signal is output, otherwise, a low-level detection signal is output; when the detection control unit (24) receives the high-level detection signal, it outputs a high-level control signal, and conversely, outputs a low-level control signal.
5. The intelligent system frequent power-off startup circuit optimization device according to claim 4, wherein: the detection charging protection circuit (242) is a switching diode.
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| CN205986311U (en) * | 2016-07-25 | 2017-02-22 | 深圳市大公检测技术有限公司 | Gas chromatograph's power protection devices |
| CN207369007U (en) * | 2017-08-11 | 2018-05-15 | 南京启越机电设备有限公司 | Soft-touch control |
| CN107769318A (en) * | 2017-11-03 | 2018-03-06 | 深圳锐源微电子科技有限公司 | Charging circuit, device, intelligent terminal and charging method |
| CN207516929U (en) * | 2017-11-23 | 2018-06-19 | 深圳市柔宇科技有限公司 | Switching on and shutting down control circuit and mobile terminal |
| CN209132717U (en) * | 2018-10-26 | 2019-07-19 | 深圳市宇通联发科技有限公司 | A kind of intelligence system frequently powers off boot-strap circuit optimization device |
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