KR101048434B1 - Uninterruptible power supply for mobile communication terminal - Google Patents

Abstract

The present invention provides an uninterruptible power supply of a mobile communication terminal, comprising: a constant voltage power supply for supplying a voltage of a main power supply with a constant constant voltage; A diode which prevents the output of the constant voltage power supply from flowing back into the constant voltage power supply; A second constant voltage power supply configured to receive the output of the diode so that the battery power is supplied to the main power of the set without interruption at a constant voltage; By including a Schottky diode so that the voltage supplied from the second constant voltage power supply unit is supplied as high as the forward voltage of the diode, there is no telephone or mobile communication terminal using a battery for the call in case of power failure It is possible to provide an intermittent (uninterrupted power supply) power supply.

Description

Uninterruptible power supply of mobile communication terminal {Apparatus for continuous power supply in mobile communication station}

1 is a block diagram of a general mobile communication system,

2 is a block diagram of a power supply device of a conventional mobile communication terminal,

3 is a block diagram of an uninterruptible power supply of a mobile communication terminal according to the present invention.

Explanation of symbols on the main parts of the drawings

10: exchanger 20: HLR

30: PSTN 40: base station

50: mobile communication terminal 51: first constant voltage power supply

52: voltage detector 53: second constant voltage power supply

Q1 ~ Q6: Transistors D1, D2: Diode

R1 to R7: Resistance C1 to C6: Condenser

V_battery: battery V_input: adapter output power

A (1), A (2): control signal

The present invention relates to an uninterruptible power supply of a mobile communication terminal, and in particular, to provide an uninterrupted (non-stop power supply) power supply in a telephone or a mobile communication terminal using a battery for a call in case of a power failure. The present invention relates to an uninterruptible power supply of a mobile communication terminal.

In general, a mobile communication system is a communication system that targets mobile devices such as people, cars, ships, trains, and airplanes, which includes key phone systems, mobile phones (mobile phones, vehicle phones), port phones, aircraft phones, and mobile phones. Trains, cruise ships, express buses), radio calling, radiotelephony, satellite mobile communication, amateur radio, and fishing service ships.

The mobile communication system includes an AMPS (Advanced Mobile Phone Service) system using an analog method, a Code Division Multiple Access (CDMA) system using a digital method, a Wideband Code Division Multiple Access (WCDMA), and a TDMA (Time). Division Multiple Access, Time Division Multiple Access (FDMA) system, Frequency Division Multiple Access (FDMA) system, Wireless Local Loop (WLL), CDMA2000-1x, IMT-2000 (International Mobile Telecommunication in the year 2000 , Global mobile communication (GSM) systems, and GSM (Global System for Mobile communication) systems.

1 is a block diagram of a general mobile communication system.

Where reference number 10 is a mobile switching center / visitor location register (MSC / VLR), 20 is a home location register (HLR), and 30 is a public switched telephone network (PSTN) 40 is a base station controller (BSC / BTS) and 50 is a mobile station (MS).

Thus, the MSC 10 performs an exchange function, and serves as a road and an intersection of all communication lines.

The HLR 20 is a database in which subscriber information is stored, and the VLR is a device that temporarily stores important subscriber information in order to prevent frequent HLR 20 inquiry.

The PSTN 30 refers to the entire telephone network used in a general home.

Thus, when a user calls a mobile communication terminal 50 of a mobile subscriber from a general home telephone, the home telephone signal is first connected to the PSTN 30 and then inputted to the switch 10 of the mobile communication operator using the telephone number. .

The exchange 10 of the mobile communication provider inquires whether the subscriber is a valid subscriber and the location of the subscriber to the HLR 20, and then transmits the information to the corresponding base station 40 to call the mobile communication terminal 50.

The location of the BSC and VLR in terms of systems may vary depending on the equipment manufacturer. For example, the BSC may be in the same spatial location as the MSC or may be in the BTS, which is the base station 40. The base station 40 means that the BSC and the BTS are combined.

2 is a block diagram of a power supply of a conventional mobile communication terminal.

Therefore, the prior art configuration includes a constant voltage device 51 for maintaining and supplying a main power supply to a constant voltage, a voltage detection device 52 for detecting a voltage, transistors Q1 to Q5 for switching a backup power supply, and a power supply having a polarity. Diodes (D1) and (D2) for connecting the capacitors, capacitors (C1 to C5) for removing or smoothing various noises, and resistors (R1 to R7) for supplying a bias for switching the transistors.

Reference numerals A (1) and A (2) are ports for receiving control signals.

In addition, V_battery is a battery power supply, and V_input is a DC output voltage of 9-12V as an adapter output power supply.

The operation of the prior art will be described in detail with reference to the accompanying drawings.

In the prior art configuration, the power supply source is composed of a V_input source that is supplied by converting commercial power into a direct current through an adapter or the like, and a battery (V_battery) that supplies power to the set at a power failure. The power source used in the set here is VCC.

So, first, the flow of power supply in a normal state in which commercial power is supplied is as follows.

A voltage converted to a lower voltage than a commercial power supply (generally 9V to 12V) and rectified by DC is applied to V_input to enter the constant voltage power supply 51.

The voltage applied to V_input is an unstable state in which the voltage is changed by the load current while the ripple is included. This unstable power is stabilized to a constant voltage by the constant voltage power supply 51. Conventionally, in FIG. 2, the constant voltage power supply 51 is stabilized with a 6v DC power supply.                         

The power stabilized in the constant voltage power supply 51 is supplied to the main power supply (VCC) of the set through the D1 diode, which prevents the power supplied from the battery from flowing back to the constant voltage power supply 51 during a power failure. Do this.

When the commercial power is normally supplied as described above and the power is not supplied by the power failure, the battery power (V_battery) is supplied to the set power through the Q3 transistor and the D2 diode, and the battery voltage is the Vce voltage (about 0.2V) of the Q3 transistor. And the forward voltage of the D2 diode (approximately 0.6) is supplied to the set.

That is, while the voltage of about 0.8 ~ 0.9V compared to the battery voltage is reduced, since the supply to the set of VCC is reduced the use efficiency of the battery power source.

Therefore, to compensate for this, after a slight time delay (approximately tens of mS to hundreds of mS) after the power failure, the set applies a high level to the Q5 transistor to turn on the Q4 transistor, thereby reducing the diode's drop voltage during battery backup. This reduces the Vce (0.2V) of the Q4 transistor, increasing the backup efficiency of the battery.

The Q1 and Q2 transistors are circuits for controlling the battery supply voltage in the set.

In addition, the voltage detector 52 is a voltage detector of 4.5V, and performs a function of shutting off power supplied from the battery to the set to prevent the battery from overdischarging when the battery voltage is 4.5V or less.

The voltage detector 52 controls the backup power supply through the Q6 transistor and the Q3 transistor.                         

However, this conventional technology has the following problems.

In other words, since the battery is backed up by the drop voltage of the initial transistor and the diode to be supplied to the power supply of the set, there is a problem that the backup time is reduced due to the decrease in the use efficiency of the battery power.

In addition, when the Q4 transistor is turned on to reduce the battery drop voltage after a certain period of time after the power failure, the set supply power fluctuates. There was a problem that could work wrong.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, an object of the present invention is the interruption (disruption of power supply) in a telephone or mobile communication terminal using a battery for a call in case of power failure An uninterruptible power supply of a mobile communication terminal capable of providing a power supply) is provided.

In order to achieve the above object, an uninterruptible power supply of a mobile communication terminal according to an embodiment of the present invention,

A constant voltage power supply for supplying a voltage of the main power supply with a constant constant voltage; A diode which prevents the output of the constant voltage power supply from flowing back into the constant voltage power supply; A second constant voltage power supply configured to receive the output of the diode so that the battery power is supplied to the main power of the set without interruption at a constant voltage; Technical features of the present invention include a Schottky diode configured to supply a voltage supplied from the second constant voltage power supply as high as a forward voltage of the diode.

Hereinafter, an embodiment according to the present invention as described above, the technical spirit of the uninterruptible power supply of the mobile communication terminal will be described with reference to the drawings.

3 is a block diagram of an uninterruptible power supply of a mobile communication terminal according to the present invention.

As shown therein, a constant voltage power supply unit 51 for supplying a voltage of the main power supply VCC to a constant constant voltage; A diode (D1) for preventing the output of the constant voltage power supply (51) from flowing back to the constant voltage power supply (51); A second constant voltage power supply 53 for receiving the output of the diode D1 so that the battery power is supplied to the main power supply VCC of the set without interruption at a constant voltage; The second constant voltage power supply 53 is configured to include a Schottky diode (D2) to be supplied as high as the forward voltage of the diode.

The second constant voltage power supply 53 receives a control signal through a control port, and when a low level signal is applied to the control port, cuts off the power V_battery supplied from the battery to the set power. .

Here, reference numeral V_battery is a power supply battery for supplying backup power as a set in case of power failure, C1 to C6 are capacitors for reducing and smoothing various noises, and R1 and R2 are appropriate levels of the second constant voltage power supply 53. A (1) is the port to which the control signal is input, and VCC is the main power supply.

In addition, the Schottky diode D2 is used to supply the voltage supplied from the second constant voltage power supply 53 as high as the forward voltage of the diode (about 0.2V forward voltage).

The operation of the uninterruptible power supply of the mobile communication terminal according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the present invention is to provide an uninterrupted power supply in a telephone or mobile communication terminal using a battery for a call in case of power failure.

Therefore, the power supply source is composed of a V_input source supplied by converting commercial power into direct current through an adapter or the like and a battery (V_battery) for supplying power in case of power failure.

First, the flow of power supply in a normal state in which commercial power is supplied will be described below.

A voltage converted from a commercial power supply (typically 220V alternating current) to a low voltage (typically 9-12V direct current) using an adapter is applied to the V-input.

The power applied to V_input is in an unstable state in which the voltage is changed by the load current.

The unstable power is stabilized to a constant voltage by the first constant voltage power supply 51.

The power stabilized in the first constant voltage power supply unit 51 is supplied to the main power supply (VCC) of the set through the D1 diode, and the role of the D1 diode is that the power V_battery supplied from the battery during the power failure is the first constant voltage power supply. This is to prevent backflow to (51).

Thus, in the normal state, the commercial power is supplied as described above, and when the power failure is performed as follows.

That is, the battery power V_battery is constant voltage to the voltage required by the set through the second constant voltage power supply 53, and is continuously supplied to the main power VCC of the set without interruption of the power supply. This allows the set to operate normally regardless of power outages.

The control port A (1) is used as a control terminal for disconnecting backup power from the control device.

Thus, when the battery is lower than the specified voltage or the control device artificially shuts down the backup power to protect the battery, by applying a low level signal to the control port, the power supplied from the battery to the set power is cut off. Use it to

As such, the present invention is to provide an uninterrupted power supply in a phone or mobile communication terminal using a battery for a call in case of power failure.

Although preferred embodiments of the present invention have been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the uninterruptible power supply of the mobile communication terminal according to the present invention, unlike the prior art, the backup power supply the capacity of the battery by supplying a stable power supply of the set power without interruption or change of power supply in case of power failure Efficient use has the effect of extending backup time.

In addition, the present invention can stably supply the backup power supply without voltage fluctuation or instantaneous power failure, thereby preventing the malfunction of the set due to power fluctuation or noise.

Claims (2)

A constant voltage power supply for supplying a voltage of the main power supply with a constant constant voltage; A diode which prevents the output of the constant voltage power supply from flowing back into the constant voltage power supply; A second constant voltage power supply configured to receive the output of the diode so that the battery power is supplied to the main power of the set without interruption at a constant voltage; And a schottky diode configured to supply a voltage supplied from the second constant voltage power supply as high as a forward voltage of the diode. The method of claim 1, wherein the second constant voltage power supply, The control device receives a control signal through a control port, and when the low level signal is applied to the control port, the uninterruptible power supply of the mobile communication terminal, characterized in that to cut off the power supplied to the set power from the battery.

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