CN106899285B - Automatic start-up voltage regulating circuit - Google Patents
Automatic start-up voltage regulating circuit Download PDFInfo
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- CN106899285B CN106899285B CN201710277351.0A CN201710277351A CN106899285B CN 106899285 B CN106899285 B CN 106899285B CN 201710277351 A CN201710277351 A CN 201710277351A CN 106899285 B CN106899285 B CN 106899285B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
An automatic starting voltage regulating circuit relates to the field of starting voltage regulating output voltage. The invention aims to solve the problem that the existing startup and shutdown circuit can realize startup and shutdown by pressing a key S1, but cannot realize automatic startup after automatic shutdown. Automobile ignition, IG+24V access, M_CTL low level, IGIN current-limiting through a resistor R6 to supply power for IGIN_1, and IGIN_1 outputting high level to provide working voltage for equipment; when IG+24V descends to 17V, M_CTL outputs high level, KT4 drives KT1 to work, ua drives KT5 and KT3 to work for high level, IGIN_1 outputs low level, and the equipment enters a shutdown state; when IG+24V rises to 17.8V, the resistor R3 and the resistor R8 are divided, KT2 is conducted, KT5 and KT3 stop working at the same time, IGIN_1 is output at a high level, and the device is started. For adjusting the on-off voltage.
Description
Technical Field
The invention relates to an automatic start-up voltage regulating circuit. Belongs to the field of regulating output voltage through starting voltage.
Background
With the continuous development of the automobile industry, how to rely on automation to control the starting or closing of the automobile becomes a research direction of the automobile industry.
Fig. 1 shows a circuit for realizing switching on and switching off by a key, wherein a Vin terminal is connected with an LDO or DC-DC power chip, and a pwr_ctrl port is connected with a PSoC chip. The power-on principle, the power-off principle and the automatic power-off principle of fig. 1 are as follows:
starting up the working principle: when the system is in a shutdown state, the switch SW1 is pressed down, the grid voltage of the PMOS tube Q1 is changed from 9V to 4.5V after the voltage of a 9V battery is divided by R1 and R3, the source voltage of the Q1 is 9V and is input, vgs=Vg-Vs=4.5-9= -4.5V, and Q1 is accordingly conducted, so that Vin is similar to the input power voltage, vin is converted into the power voltage VDD required by the system through a later LDO or DC-DC power chip, and the system behind the product starts to work; then when the same power-on operation is started, PSoC outputs an I/O port through PWR_CTRL to output a high level signal, the drain electrode of Q2 becomes low level, so that the grid electrode of Q1 is locked into a low level state, and therefore, after the SW1 switch button is released, vsg is still larger than the on-state voltage of the PMOS tube Q1, and the battery voltage can be stably sent to a following product system circuit to realize power supply.
Shutdown working principle: when no switch SW1 is pressed after the system is started, PSoC input ON/OFF is always in a high state due to the fact that the resistor R2 is pulled up to VDD. When the switch SW1 is suddenly pressed, the negative terminal of the diode D1 becomes zero level, and the ON/OFF input level is changed from the original VDD high state to the diode forward voltage level 0.6V low state. This abrupt change in the level state of the ON/OFF input port causes the PSoC to generate an I/O port interrupt, which performs a shutdown interrupt process: the PWR _ CTRL port is set to output a 0 level signal. When pwr_ctrl=0, the drain of Q2 is a high level signal, the gate voltage of Q1 also becomes 9V level, vgs becomes 0V, and the pmos transistor Q1 is closed, so that the battery voltage and the input voltage Vin are cut off, and the shutdown function is realized.
Automatic shutdown working principle: the MCU in the PSoC continuously detects external input manipulation, and when no external manipulation is detected to exceed the preset time, the PSoC sets the output PWR_CTRL port to 0, so that an automatic shutdown function is realized. As for the time timing function, the PSoC chip may have various implementations, for example, may be implemented by a hardware timer user module constructed of a programmable digital module, may be implemented by a sleep timer integrated in itself within the PSoC chip, or may be implemented by software counting timing, etc.
However, the switching circuit in the prior art has the defects that: pressing the key S1 can realize startup and shutdown, but cannot realize automatic startup after automatic shutdown.
Disclosure of Invention
The invention aims to solve the problem that the existing startup and shutdown circuit can realize startup and shutdown by pressing a key S1, but cannot realize automatic startup after automatic shutdown. An automatic start-up voltage regulation circuit is now provided.
An automatic starting voltage regulating circuit comprises a diode RD1, a voltage stabilizing tube RD2, a voltage stabilizing tube RD3, resistors R1-R13, a capacitor C1, a capacitor C2 and triodes KT 1-KT 5,
the cathode of the diode RD1 is connected with one end of a resistor R1, the other end of the resistor R1 is simultaneously connected with the cathode of a voltage stabilizing tube RD2, one end of a resistor R4, one end of a resistor R6 and the emitter of a triode KT1, the anode of the voltage stabilizing tube RD2 is connected with the power supply ground,
the collector of the triode KT1 is simultaneously connected with one end of a capacitor C1 and one end of a resistor R2, the other end of the capacitor C1 is connected with the power ground, the other end of the resistor R2 is simultaneously connected with one end of a resistor R13, one end of a resistor R10, one end of a resistor R11 and the collector of the triode KT2, the emitter of the triode KT2 is simultaneously connected with one end of a resistor R8 and the power ground, the other end of the resistor R8 is simultaneously connected with one end of a resistor R3 and the base of the triode KT2, the other end of the resistor R6 is simultaneously connected with the cathode of a voltage stabilizer RD3 and the collector of the triode KT3, the base of the triode KT3 is connected with the other end of a resistor R11, the emitter of the triode KT3 is simultaneously connected with the other end of the power ground and the resistor R13, the emitter of the triode KT5, the power ground, the emitter of the triode KT4, one end of the resistor R12 and one end of the capacitor C2,
the other end of the capacitor C2 is simultaneously connected with one end of a resistor R9, the other end of a resistor R12 and the base electrode of a triode KT4, the collector electrode of the triode KT4 is connected with one end of a resistor R7, the other end of the resistor R7 is simultaneously connected with the other end of the resistor R4, one end of a resistor R5 and the collector electrode of the triode KT5, the base electrode of the triode KT5 is connected with the other end of a resistor R10,
the base of triode KT1 is connected with the other end of resistor R5.
The invention has the beneficial effects that:
in actual use, the anode of the diode RD1 is connected with an automobile ignition signal IG+24V (same as the voltage of the storage battery); the other end of the resistor R1 is connected with a subsequent circuit, and the other end of the resistor R1 is used for providing a power supply voltage IGIN for the subsequent circuit; the cathode of the voltage stabilizing tube RD3 is connected with an enabling pin IGIN_1 of the subsequent power supply chip, and the cathode of the voltage stabilizing tube RD3 is used for providing voltage for the subsequent power supply chip and controlling whether the power supply chip works (the power supply chip works when the IGIN_1 is at a high level); the other end of the resistor R9 is used for receiving an on or off signal M_CTL, and the M_CTL is high-level active;
when the automobile ignites, IG+24V is connected, the voltage of a normal IG+24V signal is 24V, M_CTL is set at a low level, IGIN is limited by a resistor R6 to supply power for IGIN_1, and IGIN_1 outputs a high level to work for a subsequent power supply chip and provide working voltage for equipment.
When the input end IG+24V (battery voltage) of the automobile ignition signal drops to 17V, the M_CTL pin outputs a high level, the triode KT4 works, the triode KT1 is driven to work, the Ua is at a high level, the triode KT5 and the triode KT3 are driven to work simultaneously (the KT5 can continuously drive the KT1 to form self-locking, the triode KT4 is shielded from controlling the triode KT 1), the IGIN_1 outputs a low level, and the work of a subsequent power supply chip is stopped, so that equipment enters a shutdown state.
When the ignition signal IG+24V (battery voltage) of the automobile rises to 17.8V again, ub is 0.6V through the voltage division of the resistor R3 and the resistor R8, the triode KT2 is just the conducting voltage of the triode KT2, the triode KT2 is conducted to enable Ua to be low level, the triode KT5 and the triode KT3 stop working at the same time, IGIN_1 resumes high level output, a follow-up power chip is driven to work, and the equipment is started.
When the automobile is ignited, the IG+24V is connected with the 24V voltage, and the IGIN_1 automatically outputs different voltages to drive the subsequent power chip or stop the subsequent power chip through controlling the high and low level inputs of the M_CTL, so that the equipment is started or shut down.
Drawings
FIG. 1 is a schematic diagram of a conventional circuit for switching on and off via a key;
fig. 2 is a schematic diagram of an automatic start-up voltage adjusting circuit according to an embodiment.
Detailed Description
The first embodiment is as follows: referring to fig. 2, the automatic start-up voltage adjusting circuit according to the present embodiment includes a diode RD1, a regulator RD2, a regulator RD3, resistors R1-R13, a capacitor C1, a capacitor C2, and transistors KT 1-KT 5,
the cathode of the diode RD1 is connected with one end of a resistor R1, the other end of the resistor R1 is simultaneously connected with the cathode of a voltage stabilizing tube RD2, one end of a resistor R4, one end of a resistor R6 and the emitter of a triode KT1, the anode of the voltage stabilizing tube RD2 is connected with the power supply ground,
the collector of the triode KT1 is simultaneously connected with one end of a capacitor C1 and one end of a resistor R2, the other end of the capacitor C1 is connected with the power ground, the other end of the resistor R2 is simultaneously connected with one end of a resistor R13, one end of a resistor R10, one end of a resistor R11 and the collector of the triode KT2, the emitter of the triode KT2 is simultaneously connected with one end of a resistor R8 and the power ground, the other end of the resistor R8 is simultaneously connected with one end of a resistor R3 and the base of the triode KT2, the other end of the resistor R6 is simultaneously connected with the cathode of a voltage stabilizer RD3 and the collector of the triode KT3, the base of the triode KT3 is connected with the other end of a resistor R11, the emitter of the triode KT3 is simultaneously connected with the other end of the power ground and the resistor R13, the emitter of the triode KT5, the power ground, the emitter of the triode KT4, one end of the resistor R12 and one end of the capacitor C2,
the other end of the capacitor C2 is simultaneously connected with one end of a resistor R9, the other end of a resistor R12 and the base electrode of a triode KT4, the collector electrode of the triode KT4 is connected with one end of a resistor R7, the other end of the resistor R7 is simultaneously connected with the other end of the resistor R4, one end of a resistor R5 and the collector electrode of the triode KT5, the base electrode of the triode KT5 is connected with the other end of a resistor R10,
the base of triode KT1 is connected with the other end of resistor R5.
In the present embodiment, in fig. 1, ig+24v is an automobile ignition signal (same as a battery voltage); IGIN is the subsequent circuit supply voltage after dividing ig+24v; IGIN_1 is the output voltage of IGIN controlled by KT3 after passing through the current limiting resistor R6, and is used for driving the enable pin of the subsequent power chip, so as to control whether the power chip works (the power chip works when IGIN_1 is at high level); m_ctl is a control signal that controls the circuit of the present application to be turned off, and is active high.
The resistor R4 and the resistor R7 in fig. 1 are a voltage dividing circuit and a bias circuit, and the bias circuit controls the triode KT1 to be turned off.
Resistor R10, resistor R11, and resistor R13 are bias circuits that control the turning off of transistors KT3 and KT 5. Resistor R9, resistor R12 and capacitor C2 are controlled to be conductive.
The second embodiment is as follows: in this embodiment, the automatic start-up voltage adjusting circuit according to the first embodiment is further described, and in this embodiment, the other end of the resistor R9 is connected to the anode of the diode RD1 and the other end of the resistor R3 at the same time.
In this embodiment, the automatic shutdown voltage of the device is set by controlling the on or off signal m_ctl or by switching m_ctl to ig+24v, and the operation of the subsequent power supply chip is stopped by adjusting the resistance values of the resistor R9 and the resistor R12, thereby setting the automatic shutdown voltage of the device.
Claims (2)
1. The automatic starting voltage regulating circuit is characterized by comprising a diode RD1, a voltage stabilizing tube RD2, a voltage stabilizing tube RD3, resistors R1-R13, a capacitor C1, a capacitor C2 and triodes KT 1-KT 5,
the cathode of the diode RD1 is connected with one end of a resistor R1, the other end of the resistor R1 is simultaneously connected with the cathode of a voltage stabilizing tube RD2, one end of a resistor R4, one end of a resistor R6 and the emitter of a triode KT1, the anode of the voltage stabilizing tube RD2 is connected with the power supply ground,
the collector of the triode KT1 is simultaneously connected with one end of a capacitor C1 and one end of a resistor R2, the other end of the capacitor C1 is connected with the power ground, the other end of the resistor R2 is simultaneously connected with one end of a resistor R13, one end of a resistor R10, one end of a resistor R11 and the collector of the triode KT2, the emitter of the triode KT2 is simultaneously connected with one end of a resistor R8 and the power ground, the other end of the resistor R8 is simultaneously connected with one end of a resistor R3 and the base of the triode KT2, the other end of the resistor R6 is simultaneously connected with the cathode of a voltage stabilizer RD3 and the collector of the triode KT3, the base of the triode KT3 is connected with the other end of a resistor R11, the emitter of the triode KT3 is simultaneously connected with the power ground, the other end of a resistor R13, the emitter of a triode KT5, the emitter of a triode KT4, one end of a resistor R12 and one end of the capacitor C2,
the other end of the capacitor C2 is simultaneously connected with one end of a resistor R9, the other end of a resistor R12 and the base electrode of a triode KT4, the collector electrode of the triode KT4 is connected with one end of a resistor R7, the other end of the resistor R7 is simultaneously connected with the other end of the resistor R4, one end of a resistor R5 and the collector electrode of the triode KT5, the base electrode of the triode KT5 is connected with the other end of a resistor R10,
the base electrode of the triode KT1 is connected with the other end of the resistor R5;
the other end of the resistor R1 is used for providing a power supply voltage IGIN for a subsequent circuit; the cathode of the voltage stabilizing tube RD3 is connected with an enabling pin IGIN_1 of the subsequent power supply chip.
2. The automatic start-up voltage adjusting circuit according to claim 1, wherein the other end of the resistor R9 is connected to both the anode of the diode RD1 and the other end of the resistor R3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710277351.0A CN106899285B (en) | 2017-04-25 | 2017-04-25 | Automatic start-up voltage regulating circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710277351.0A CN106899285B (en) | 2017-04-25 | 2017-04-25 | Automatic start-up voltage regulating circuit |
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| CN106899285A CN106899285A (en) | 2017-06-27 |
| CN106899285B true CN106899285B (en) | 2023-04-25 |
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| CN112994670B (en) * | 2021-05-08 | 2021-09-07 | 杭州米芯微电子有限公司 | Low-shutdown-power-consumption circuit of SOC (System on chip) and SOC |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2122947U (en) * | 1992-04-21 | 1992-11-25 | 北京市公共交通研究所 | High-frequency continuous igniter for vehicles |
| US5489840A (en) * | 1994-07-25 | 1996-02-06 | Caron; Jacques | Control circuit for controlling voltage supply to electric devices |
| CN203132595U (en) * | 2013-04-07 | 2013-08-14 | 航天科技控股集团股份有限公司 | Automotive resistance type water temperature fuel sampling system |
| CN203305935U (en) * | 2013-06-14 | 2013-11-27 | 长安大学 | Automatic power-on and power-off controller of vehicle electronic equipment |
| CN204810138U (en) * | 2015-06-29 | 2015-11-25 | 成都鼎桥通信技术有限公司 | Terminal equipment's automation start shooting circuit and terminal equipment |
| CN205847223U (en) * | 2016-05-09 | 2016-12-28 | 福建魔方电子科技有限公司 | A kind of singly-bound Sofe Switch electromechanics road possessing hardware forced shutdown function |
| CN206658187U (en) * | 2017-04-25 | 2017-11-21 | 航天科技控股集团股份有限公司 | Auto Power On voltage regulator circuit |
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