CN201142006Y - Power supply change awakening device in standby mode - Google Patents

Abstract

A power supply change wake-up device in a standby mode comprises a power supply unit which can supply required power; a switch unit connected with the power supply unit; the voltage stabilizing unit, the low-voltage resetting unit and the micro control unit are respectively connected with the switch unit; and a wake-up detection unit at least having a trigger unit connected with the switch unit, a comparator connected with the trigger unit and the bias voltage generator, and capable of using the switch unit to control the power supply unit to cause the voltage change output by the trigger unit and cooperating with the bias voltage generator and the comparator to generate a wake-up signal to wake up the micro control unit. Therefore, the power saving, high efficiency and fast switching performance are achieved by the wake-up detection unit.

Description

Power change wake-up device in standby mode

Technical field:

The utility model relates to a wake-up device for power supply change in standby mode, in particular to a wake-up device which can save power, have high efficiency and quickly change sex by utilizing the setting of a wake-up detection unit.

Background technique:

General electronic equipment uses batteries as power supply, therefore, the power cannot be turned on continuously when the power is limited, so the electronic equipment is usually equipped with a standby/wake-up device, so as not to cause power consumption, when in use Turn it on when not in use and turn it off when not in use.

And existing standby/wake-up device 7, as shown in Figure 2, it has at least a power supply unit 71, a power switch 72, a voltage stabilizing capacitor 73, a low voltage reset circuit (low voltage reset circuit) 74, micro Controller (MCU) 75 and a wake-up signal detection circuit 76; so as to wake up the required electronic equipment using power fluctuations in standby mode; when used, the microcontroller 75 is often in standby mode during non-operation During the standby mode, if the power switch 72 is cut off and then turned off, the power supply will be restored. At this time, the microcontroller 75 will drop the voltage according to the power loss of the power supply unit 71, and there will be two A state is generated.

The voltage of the power supply unit 71 is lower than the voltage level of the low-voltage reset circuit 74 to generate a reset, and the microcontroller 75 can operate normally at this time.

The voltage of the power supply unit 71 is not lower than the voltage level of the low-voltage reset circuit 74 and reset cannot be generated. At this time, the microcontroller 75 is still in the standby mode. If there is no wake-up trigger signal, the microcontroller 75 cannot reset. The microcontroller 75 is triggered when the power is sensed and re-supplied by the normal input pin.

But in the standby mode of the power supply unit 71, because all circuits are in the state of no power consumption, only the wake-up signal detection circuit 76 is activated at this moment, therefore, the power consumption of the wake-up signal detection circuit 76 forms a voltage discharge path, and The current consumption of the discharge path should not be too large, so as to avoid increasing the power loss in the standby mode. Therefore, the discharge speed of the power supply unit 71 is very slow at this time, so that the faster voltage disconnection and then on will result in failure to generate Resetting or waking up, like this, seriously affects the convenience of operating the portable electronic device.

Utility model content:

The technical problem to be solved by the utility model is: aiming at the deficiencies of the above-mentioned prior art, to provide a power change wake-up device in the standby mode, which can use the setting of the wake-up detection unit to achieve the effects of power saving, high efficiency and quick sex change .

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: a power source change wake-up device in standby mode, which at least includes a power supply unit for supplying required power, a switch unit, a voltage stabilizing unit, a low voltage reset unit and a micro control unit, the switch unit is connected to the power supply unit; the voltage stabilizing unit, the low voltage reset unit, and the micro control unit are respectively connected to the switch unit; the feature is: the device also It includes a wake-up detection unit, which at least has a trigger unit connected with the switch unit, a comparator connected with the trigger unit and the micro control unit, and the comparator is also connected with a bias generator.

In this way, the switching unit can be used to control the power supply unit to cause the voltage change of the output of the trigger unit, and cooperate with the bias voltage generator and comparator to generate a wake-up signal to wake up the micro-control unit, so as to achieve power saving, high efficiency and fast sex change. .

Description of drawings:

Fig. 1 is a schematic diagram of the basic structure of the utility model.

FIG. 2 is a schematic diagram of the basic architecture of an existing wake-up device.

Label description:

Power supply unit 1 Switch unit 2

Voltage stabilization unit 3 Low voltage reset unit 4

Micro control unit 5 Wake up detection unit 6

Trigger unit 61 Bias voltage generator 62

Comparator 63 Standby/Wakeup Device 7

Power supply unit 71 Power switch 72

Stabilizing capacitor 73 Low voltage reset circuit 74

Microcontroller 75

Wake-up signal detection circuit 76

Detailed ways:

Please refer to Fig. 1, which is a schematic diagram of the basic structure of the present invention. As shown in the figure: the utility model is a power change wake-up device in standby mode, which at least consists of a power supply unit 1, a switch unit 2, a voltage stabilizing unit 3, a low voltage reset unit 4, and a micro control unit 5 and a wake-up detection unit 6; can utilize the setting of the wake-up detection unit 6 and cooperate with the power supply unit 1, switch unit 2, voltage stabilizing unit 3, low-voltage reset unit 4 and micro-control unit 5 to achieve Power saving, high efficiency and quick replacement effect.

The power supply unit 1 mentioned above is used to supply the required power.

This switch unit 2 is connected to the above-mentioned power supply unit 1 .

The voltage stabilizing unit 3 is connected to the switch unit 2, and the voltage stabilizing unit 2 can be a stabilizing capacitor.

The low-voltage reset unit 4 is connected to the above-mentioned switch unit 2 .

The micro control unit 5 is connected to the above-mentioned switch unit 2 .

The wake-up detection unit 6 at least has a trigger unit 61 connected with the switch unit 2, a comparator 63 connected with the trigger unit 61, a bias voltage generator 62 and the microcontroller unit 5, and the trigger unit 61 is composed of a capacitor It is connected in series with a resistor, its output end is the place where the two are connected in series, the input end is the other end of the capacitor, and the other end of the resistor is grounded, or connected to a fixed reference voltage source; the bias voltage generator 62 provides a stable reference A voltage source; thereby, the switching unit 2 can be used to control the power supply unit 1 to cause the output voltage of the trigger unit to change, and cooperate with the partial bias voltage generator 62 and the comparator 63 to generate a wake-up signal to wake up the micro-control unit 5 . If so, constitute a brand-new power source change wake-up device in standby mode.

When in use, the utility model can be connected with the required electronic equipment, so that the electronic equipment enters the standby mode when not in use, and is awakened by the change of the power supply when in use; The wake-up detection unit 6 detects the power supply unit 1 in the standby mode. When the switch unit 2 is turned off, the voltage of the power supply unit 1 will drop slowly, and the slow voltage drop will not generate a wake-up signal, but when When the switch unit 2 is turned on, the voltage of the power supply unit 1 will rise rapidly. At this time, if the voltage rises rapidly from low to high, the output voltage of the trigger unit 61 will change. The set level will make the comparator 63 generate a wake-up signal to notify the micro-control unit 5, so that the micro-control unit 5 breaks away from the standby mode. In this way, when the utility model is used in practice, as long as the voltage transmitted by the power supply unit 1 has A small difference can be detected by the wake-up detection unit 6, which can maintain the normal fast switching habit without sacrificing the standby time by increasing the discharge current.

In summary, the wake-up device for power changes in the standby mode of the present invention can effectively improve the various shortcomings of the prior art, and can use the setting of the wake-up detection unit to achieve power saving, high efficiency and fast sex change, and then can generate It is more progressive, more practical, and more in line with the needs of consumers. It has indeed met the requirements for patent applications for inventions, and patent applications are filed in accordance with the law.

Claims (5)

1. the power supply of standby change Rouser, it comprises a power supply unit of supplying with required electric power, a switch element, a voltage regulation unit, a low-voltage reset unit, an and micro-control unit at least, this switch element is connected with this power supply unit; This voltage regulation unit, this low-voltage reset unit, and this micro-control unit be connected with this switch element respectively; It is characterized in that: described device also comprises and wakes detecting unit up, and it has a trigger element that is connected with described switch element, a comparer that is connected with trigger element and micro-control unit at least, and this comparer is connected with a bias generator in addition.

2. the power supply of standby according to claim 1 changes Rouser, and it is characterized in that: described voltage regulation unit is a capacitor.

3. the power supply of standby according to claim 1 changes Rouser, and it is characterized in that: described bias generator is stable reference voltage source.

4. the power supply of standby according to claim 1 changes Rouser, it is characterized in that: described comparer is a circuit that provides the result after comparison input voltage size also will compare to export.

5. the power supply of standby according to claim 1 changes Rouser, it is characterized in that: described trigger element is connected in series with resistor by a capacitor and forms, its output terminal is the electric capacity other end for both serial connection places, input end, and resistance other end ground connection or connect a fixed voltage reference.

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