TW201620221A - Power source protection device and method - Google Patents

Abstract

A power source protection device and a power source protection method are disclosed herein, where the power source protection device comprises a power supply, a power-managing unit and a signal-sending unit. The power supply provides a DC input voltage. The power-managing unit receives the DC input voltage; when a determining voltage related to the input voltage is larger than a set voltage, the power-managing unit enters startup state and outputs a supply voltage. After receiving the supply voltage, the power-managing unit transforms the DC input voltage into a standby power output voltage and provides the standby power output voltage when the signal-sending unit sends a controlling signal to the power-managing unit within an enabling time; when not receiving the controlling signal within the enabling time, the power-managing unit enters shutdown state.

Description

Power protection device and method

The present invention relates to a circuit protection technique, and more particularly to a power protection device and a power protection method.

The importance of the power supply to the server system is self-evident. In the server system, a variety of power supplies to be powered up, such as p12v_stby, p5v_stby, and p3v3_stby, are also required. A variety of DC power supplies, such as p12v, p5v, and p3v3, are required. The voltage conversion circuit in the system is one of the important factors to maintain the normal and stable operation of the system. In addition to supplying the correct voltage to the system, the point-in-time control of the voltage output is also an indispensable part; if the voltage is supplied at the wrong time, it may cause leakage, malfunction, and even irreversible damage to the entire system. Controlling the time point of voltage output to protect the system has become an important issue in this related field.

In order to control the voltage output, an aspect of the present invention provides a power protection device including a power supply and a power management unit. With the signal sending unit. A power supply that provides a DC input voltage. The power management unit receives the DC input voltage; when the DC input voltage corresponds to one of the determination voltages being greater than a set voltage, the power management unit enters an activation state, outputs a supply voltage, and begins to calculate an energization time. The signal sending unit receives the supply voltage from the power management unit as a power source, and when the control signal is sent to the power management unit during the energizing time, the power management unit converts the DC input voltage into a power to be turned on. Outputting a voltage and providing the power-on output voltage of the to-be-powered power; when the power management unit does not receive the control signal within the energizing time, it enters a shutdown state.

In an embodiment of the invention, the power management unit is an electronic fuse (Efuse) circuit; the signal transmitting unit is a complex programmable logic device.

In an embodiment of the invention, the power protection device further includes a voltage dividing circuit coupled to the power management unit to determine the set voltage.

In one embodiment of the invention, the set voltage is 5.5 volts.

In an embodiment of the invention, the power protection device further includes a preliminary signal transmitting unit that transmits a preliminary signal to the complex programmable logic device. The complex programmable logic device receives the preparatory signal transmitting unit to send a preliminary signal to enter a standby state; when the complex programmable logic device does not enter the standby state, stops receiving the supply voltage and transmits the control signal.

Another aspect of the present invention provides a power protection method including the steps of: (a) receiving a power supply to provide a DC input voltage; and (b) determining a voltage greater than one corresponding to the DC input voltage. When setting the voltage, entering a startup state, outputting a supply voltage to a signal transmitting unit and starting to calculate an energizing time; (c) receiving a signal from the signal transmitting unit to transmit a control signal during the energizing time, The DC input voltage is converted into a standby power supply output voltage, and a standby power supply output voltage is provided; (d) when the control signal is not received within the energization time, the shutdown state is entered.

In an embodiment of the present invention, the power protection method further includes: converting the DC input voltage to the output voltage of the to-be-powered power supply through an electronic fuse circuit; wherein the signal sending unit is a complex programmable logic device.

In an embodiment of the invention, the power protection method further includes: determining the set voltage by a voltage dividing method.

In one embodiment of the invention, the set voltage is 5.5 volts.

In an embodiment of the present invention, the power protection method further includes: transmitting a preliminary signal via a preliminary signal transmitting unit; receiving a preliminary signal through the complex programmable logic device to enter a standby state; and when the complex programmable logic device is When the standby state is not entered, the reception of the supply voltage is stopped and the control signal is transmitted.

In summary, the present invention improves the voltage output mode, and uses a control signal sent during an energizing time or further cooperates with a preliminary signal to determine whether to provide a power supply output voltage to be turned on, thereby preventing the DC input voltage from reaching a certain value. Immediately thereafter, provide system damage that may be caused by the output voltage of the power to be turned on to the load.

The above description will be described in detail in the following embodiments, and further explanation of the technical solutions of the present invention will be provided.

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.

100‧‧‧Power protection device

110‧‧‧Power supply

112‧‧‧DC input voltage

120‧‧‧Power Management Unit

122‧‧‧Supply voltage

124‧‧‧ Waiting for the power supply output voltage

130‧‧‧Signal sending unit

132‧‧‧Control signal

140‧‧‧load

200‧‧‧Power protection device

230‧‧‧Complex programmable logic device

250‧‧‧voltage circuit

30~31‧‧‧ nodes

322‧‧‧ Comparator circuit

324‧‧‧Logical Circuit

352‧‧‧First resistor

354‧‧‧second resistor

356‧‧‧ Third resistor

400‧‧‧Power protection device

450‧‧‧Preparation signal sending unit

452‧‧‧Preparation signal

500‧‧‧Power protection method

S502~S510‧‧‧Steps

The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; 2] is a schematic diagram of a circuit protection device according to a second embodiment of the present invention; FIG. 3 is a schematic diagram showing the voltage dividing circuit of the second embodiment of the present invention coupled to a power management unit; FIG. 4 is a diagram illustrating the present invention. 3 is a schematic diagram of a circuit protection device according to a fourth embodiment; and FIG. 5 is a flow chart showing a circuit protection method according to a fourth embodiment of the present invention.

To make the description of the present disclosure more detailed and complete, reference is made to the drawings and the various embodiments described below. The examples are not intended to limit the scope of the invention; the description of the steps is not intended to limit the order of execution thereof, and any device having equal efficiency resulting from recombination is covered by the present invention. range.

Please refer to FIG. 1, which illustrates a power protection device 100 according to a first embodiment of the present invention. The power protection device 100 includes a power supply 110, a power management unit 120, and a signal transmitting unit 130. In practice, the power supply 110 includes a DC voltage supply circuit or other device that can supply a DC voltage. Set. The power management unit 120 includes a plurality of circuits, such as an electronic fuse circuit, a DC-to-AC circuit, an AC-DC circuit, a transformer circuit, a logic circuit, a comparator circuit, etc., and may include at least one input terminal and at least one output. End, and can be integrated into a Swap controller chipset. The signal transmitting unit 130 can be a signal generator, an oscillating circuit, a logic circuit, or a programmable control integrated circuit component such as a Field-programmable Gate Array (FPGA) or a complex programmable logic device ( Complex programmable logic device, CPLD), etc.

The power supply 110 provides a DC input voltage 112 to the power supply Management unit 120. The power management unit 120 receives the DC input voltage 112 from the power supply 110, which can be used simultaneously to supply the power management unit 120 for normal operation and as a source of decision voltage for power protection. When the DC input voltage 112 is determined by one of the internal circuit component conversions of the device to determine that the voltage is greater than a set voltage, the power management unit 120 enters an active state, and outputs a supply voltage 122 to the signal transmitting unit 130 to supply the signal transmitting unit 130 for operation. Voltage. The signal transmitting unit 130 receives the supply voltage 122 from the power management unit 120 as a power source, that is, has a function of transmitting a control signal 132. If the power management unit 120 entering the startup state receives the control signal 132 from the signal transmitting unit 130 within an energizing time, the DC input voltage 112 can be converted into a to-be-powered output voltage 124, and the standby is provided. The power supply output voltage 124 is a load 140. In this embodiment, the DC input voltage 112 is p12v, and the power supply output voltage 124 to be turned on is p12v_stby. Control signal 132 sends a power tube The condition of the unit 120 can be flexibly designed according to the user's requirements to control the power management unit 120 to provide the correct time point of the power supply output voltage 124 to the load 140 to avoid the system damage caused by the power supply output voltage 124 to be turned on at the wrong time. In addition, when the power management unit 120 enters the startup state, after the power-on time has not received the control signal 132, the power management unit 120 enters the shutdown state, and also avoids the unexpected time when the control signal 132 causes an error. The power supply output voltage is 124, which causes system damage. At this time, if it is necessary to provide the power-on output voltage 124 to be turned on, the power management unit 120 must re-enter the startup state, and receive the control signal 132 from the signal transmitting unit 130 within the enabling time to successfully provide the power-on output voltage 124 to be powered on. . In this embodiment, the energizing time is about 0.5 seconds, and the capacitance can be coupled to the power management unit 120 to determine the value of the energizing time. The relationship between the capacitance value of the capacitor and the energizing time is: the energizing time=capacitance value. *1s/μF.

In an embodiment, the power management unit is an electronic fuse The circuit converts the DC input voltage 112 into a power supply output voltage 124 to be turned on, wherein the power output voltage 124 to be turned on can be flexibly designed through the electronic fuse circuit according to actual needs. The signal transmitting unit 130 is a complex programmable logic device. When the complex programmable logic device receives the supply voltage 122 from the power management unit 120, it operates normally and executes a user-designed CPLD program to provide the power-on output voltage 124 to the load at the correct time. In this embodiment, the DC input voltage 112 is p12v, the power-on output voltage 124 is p12v_stby, the supply voltage 122 is p6v_stby, and the voltage conversion circuit is converted to p3v3_stby and connected to the complex programmable logic device 230 to provide its operation. The power supply.

In order to further elaborate the set voltage of the present invention, please Referring to FIG. 2, a power protection device 200 according to a second embodiment of the present invention is shown. Except for the complex programmable logic device 230 and the voltage dividing circuit 250, the remaining hardware and the power protection device 100 of FIG. 1 are substantially the same. The voltage dividing circuit 250 is coupled to the power management unit 120 for determining the value of the set voltage and defining a condition that the power management unit 120 enters the startup state. Specifically, as shown in FIG. 3, the voltage dividing circuit 250 includes three resistors 352, 354, and 356 connected in series, coupled to the comparator circuit 322 in the power management unit 120, and the comparator circuit 322 is coupled to the comparator circuit 322. Logic circuit 324 to define the conditions for entering the startup state, ie, setting the voltage. In this embodiment, the resistance value of the first resistor 352 is 34.8 k ohms, the resistance value of the second resistor 354 is 10 k ohms, and the resistance value of the third resistor 356 is 0 ohms, which is matched with the comparator circuit 322. The set voltage is approximately 5.5 volts. When the DC input voltage 112 is input by the node 30, and the judgment voltage generated by the voltage dividing circuit 250, that is, the voltage of the node 31 of the power management unit is greater than the set voltage of 5.5 volts, the logic circuit 324 determines that the power management unit 120 enters the startup state and The supply voltage 122 is output. Alternatively, the voltage dividing circuit 250 and the power management unit 120 may be integrated into the same unit to achieve an area reduction effect.

Alternatively, the complex programmable logic device 230 can also be The standby signal transmitting unit 450 transmits one of the preliminary signals 452 to control its operation. Referring to FIG. 4, the power protection device 400 of the third embodiment of the present invention is shown. The power protection device 400 of FIG. 4 has complex programmable logic. The remaining hardware is substantially the same as the power protection device 100 of FIG. 1 except for the device 230 and the preliminary signal transmitting unit 450.

The third embodiment of the present invention discloses a two-stage open power protection Device 400 provides more stringent circuit protection functions. When the complex programmable logic device 230 receives the supply voltage 122 from the power management unit 120, the output of the complex programmable logic device 230 also has a voltage level, that is, the control signal 132 is located at a non-zero level. The voltage level; in order to avoid the leakage of the control signal 132, the operational error or the unrecoverable damage, the preparatory signal 452 of the preliminary signal transmitting unit 450 controls whether the complex programmable logic device 230 enters the receivable supply voltage 122. The state of preparation. When the complex programmable logic device 230 does not enter the standby state, the reception of the supply voltage 122 is stopped, and the transmission of the control signal 132 is also stopped. Specifically, after the initialization of the complex programmable logic device 230 is completed, the preliminary signal transmitting unit 450 transmits the preliminary signal 452 to the complex programmable logic device 230 to enter the standby state. In this embodiment, the preliminary signal transmitting unit 450 is a programmable logic gate array. The programmable logic gate array does not send the ready signal 452 to the complex programmable logic device 230 until the complex programmable logic device 230 is initialized, at which point the complex programmable logic device 230 is not in a ready state, even if the power management unit 120 has entered the startup state and outputs supply voltage 122, and complex programmable logic device 230 also ceases to receive supply voltage 122 to avoid erroneous voltage output. After the initialization of the complex programmable logic device 230 is completed, the programmable logic gate array sends the preliminary signal 452 to the complex programmable logic device 230 to bring the complex programmable logic device into the standby state (the first segment is turned on), and the complex type can be The program logic device 230 receives the supply voltage 122 from the power management unit 120 and outputs the control according to the CPLD program designed by the user. The signal 132 is sent to the power management unit 120; the power management unit 120 supplies the power supply output voltage 124 to be turned on to the load 140 (the second segment is turned on).

Please refer to FIG. 5, which is a diagram showing the fourth embodiment of the present invention. Flowchart of road protection method 500. The power protection method includes a plurality of steps S502 to S510. Those skilled in the art should understand that the steps mentioned in this embodiment can be adjusted according to actual needs, and can be performed simultaneously or partially simultaneously, unless the order is specifically stated. As for the hardware device that implements the steps, since the above embodiments have been specifically disclosed, the description thereof will not be repeated.

First, in step S502, receiving a power supply provider One of the DC input voltages, which can be used as a source of judgment voltage for power supply and power supply protection. Next, in step S504, when the DC input voltage is judged to be greater than a set voltage by one of the internal circuit component conversions of the device, the startup state is entered, a supply voltage is outputted to the signal transmission unit, and the calculation of the energization time is started. After receiving the supply voltage, the signal transmitting unit has a function of transmitting a control signal. Then, in step S506, if the control signal sent by the signal sending unit is received within the energizing time, the DC input voltage can be converted into a power-on output voltage to be turned on, and the power-on output voltage to be turned on is provided (step S508). . In this embodiment, the DC input voltage 112 is p12v, and the power supply output voltage 124 to be turned on is p12v_stby. The condition for transmitting the control signal can be flexibly designed according to the user's needs to control the correct time point for providing the output voltage of the power to be turned on, and to avoid system damage caused by providing the output voltage of the power to be turned on at the wrong time. On the other hand, after entering the startup state, the control letter has not been received after the energization time. When the number is entered, the state is entered (step S510), and the situation that the undesired control signal causes an erroneous time point to provide the output voltage of the power to be turned on and the system is damaged is also avoided. At this time, if it is necessary to provide the output voltage of the power to be turned on, it must be re-entered into the startup state, and the control signal is received within the energizing time, so that the output voltage of the power to be turned on can be smoothly provided. In this embodiment, the energizing time is about 0.5 seconds, and the value of the energizing time can be determined by a capacitor. The relationship between the capacitance value of the capacitor and the energizing time is: the energizing time=capacitance value*1s/μF.

In an embodiment, the DC input voltage is converted to the to-be-opened The output voltage of the machine power supply is transmitted through the electronic fuse circuit, wherein the output voltage of the power supply to be turned on can be flexibly designed according to actual needs. The signal transmitting unit is a complex programmable logic device. After the complex programmable logic device receives the supply voltage, it can operate normally and execute the user-designed CPLD program to provide the power supply output voltage to the load at the correct time. In this embodiment, the DC input voltage is p12v, the output voltage of the power supply to be turned on is p12v_stby, the supply voltage is p6v_stby, the voltage conversion circuit is converted to p3v3_stby and connected to the complex programmable logic device to provide the power required for its operation.

Wherein, the above set voltage can be determined by a voltage division method. To define the conditions for entering the startup state. Specifically, as shown in FIG. 3, the voltage division circuit 250 performs voltage division, and the voltage dividing circuit 250 includes three series-connected resistors 352, 354, and 356 to define a condition for entering the startup state, that is, a set voltage. In this embodiment, the resistance value of the first resistor 352 is 34.8 k ohms, the resistance value of the second resistor 354 is 10 k ohms, and the resistance value of the third resistor 356 is 0 ohms, resulting in a set voltage of about 5.5 volts. When DC input When the voltage is generated through the voltage dividing circuit 250 to determine that the voltage is greater than the set voltage of 5.5 volts, the voltage enters the startup state and outputs the supply voltage.

The invention can also be designed as a two-stage open power protection method To provide more stringent circuit protection. In order to avoid leakage, malfunction or irreversible damage caused by the false output of the control signal, a preliminary signal transmitting unit sends a preliminary signal to control whether the complex programmable logic device enters a standby state in which the supply voltage can be received. When the complex programmable logic device does not enter the standby state, the reception of the supply voltage is stopped, and the transmission of the control signal is also stopped. Specifically, after the initialization of the complex programmable logic device is completed, the preliminary signal transmitting unit transmits the preliminary signal to enter the preparatory state. In this embodiment, the preliminary signal is sent out by the programmable logic gate array. The programmable logic gate array does not transmit the preliminary signal until the complex programmable logic device is initialized. At this time, the complex programmable logic device is not in the standby state, and stops receiving the supply voltage to avoid the occurrence of the wrong voltage output. After the initialization of the complex programmable logic device is completed, the programmable logic gate array sends a preliminary signal to the complex programmable logic device to bring the complex programmable logic device into a standby state (the first segment is turned on), the complex programmable logic device The supply voltage can be received and the control signal is output according to the CPLD program designed by the user to supply the output voltage of the power to be turned on to the load (the second stage is turned on).

In summary, the present invention has been improved by the above embodiments. The voltage output mode uses a control signal sent during an energizing time or further cooperates with a preliminary signal to determine whether to provide a power supply output voltage to be turned on, and to prevent the DC input voltage from reaching a certain value and immediately providing a power output to be turned on. Voltage to load can cause leakage, operational errors, and even irreversible damage to the entire system.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application.

100‧‧‧Power protection device

110‧‧‧Power supply

112‧‧‧DC input voltage

120‧‧‧Power Management Unit

122‧‧‧Supply voltage

124‧‧‧ Waiting for the power supply output voltage

130‧‧‧Signal sending unit

132‧‧‧Control signal

140‧‧‧load

Claims (10)

A power protection device includes: a power supply device that provides a DC input voltage; a power management unit that receives the DC input voltage; and when the DC input voltage corresponds to one of the determination voltages being greater than a set voltage, the power management unit enters a startup state, outputting a supply voltage and starting to calculate an energization time; and a signal transmitting unit receiving the supply voltage from the power management unit as a power source, and transmitting a control signal to the power management unit during the energizing time The power management unit converts the DC input voltage into a standby power supply output voltage, and provides the to-be-powered output voltage; when the power management unit does not receive the control signal within the enabling time, Enter the closed state. The power protection device of claim 1, wherein the power management unit is an electronic fuse circuit; the signal transmitting unit is a complex programmable logic device. The power protection device of claim 2 further includes a voltage dividing circuit coupled to the power management unit to determine the set voltage. The power protection device of claim 3, the set voltage is 5.5 volts. The power protection device of claim 2, further comprising a preliminary signal sending unit that sends a preliminary signal to the complex programmable logic device; wherein the complex programmable logic device receives the preliminary signal to enter a standby state; When the complex programmable logic device does not enter the standby state, it stops receiving the supply voltage and transmits the control signal. A power protection method includes the following steps: (a) receiving a DC input voltage provided by a power supply; (b) when the DC input voltage corresponds to one of the determination voltages being greater than a set voltage, entering a startup state, outputting a supply Voltage to a signal transmitting unit and starting to calculate an energizing time; (c) when receiving the signal transmitting unit to send a control signal within the energizing time, converting the DC input voltage into a standby power output voltage And providing the power-on output voltage to be turned on; and (d) entering the off state when the control signal is not received within the time of the energization. The power protection method according to claim 6, further comprising: converting the DC input voltage into an output voltage of the to-be-powered power supply through an Efuse circuit; wherein the signal transmitting unit is a complex programmable logic device . The power protection method according to claim 7, further comprising: determining the set voltage by using a voltage dividing method. The power supply protection method of claim 8, the set voltage is 5.5 volts. The power protection method of claim 7, further comprising: transmitting a preliminary signal via a preliminary signal transmitting unit; receiving the preliminary signal through the complex programmable logic device to enter a standby state; and when the complex programmable logic device is When the standby state is not entered, the reception of the supply voltage is stopped and the control signal is transmitted.