KR101891604B1 - Electronic Apparatus Including Wireless Power Receiver and Wireless Power Transmitter - Google Patents

Abstract

According to the present invention, it is possible to reduce the size of the hardware by sharing the inverter of the wireless power transmission with the rectifier of the wireless power reception, reduce the power consumption of the wireless power receiving unit which occupies most of the power consumption, (OCP) regulation by overcurrent that may occur under environmental conditions, and to reduce data transmission errors. It also has rectifier function and inverter function to prevent shutdown due to the overcurrent flowing into the inverter. It is possible to use them easily by users.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device including a wireless power receiving function and a wireless signal transmitting function,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electronic device including a wireless power receiving function and a wireless signal transmitting function, and more particularly to a signal transmitting / receiving circuit capable of simultaneously implementing a wireless power transmitting technology and a wireless power receiving technology , A wireless power receiving function, and a wireless signal transmitting function.

In general, wireless power transfer (WPT) technology has begun to explore various application fields since early 2000, and has recently been actively applied to portable products.

Technically, it is a type of transmitting and receiving energy in the form of electromagnetic energy through coils. In particular, portable products include wireless power receiving technology and wireless power used for credit card payment using MST (Magnetic Secure Transmission) Transmission techniques are technically co-linear, and there is a need for a market to include them in a single device, and such products are being developed in recent years.

However, as described above, the wireless power transmission technique requires the arrangement of various devices, and the MST technique also requires the arrangement of various devices.

However, in the case of a portable product, since the size is limited and slimming is pursued for the purpose of design and the like, it is difficult to adopt the wireless power transmission technology and the MST technology. The coil used in the conventional inverter technology has a manufacturing spread, Is limited by the internal resistance of the coil. The internal resistance of the coil is most influenced by manufacturing scattering or environmental conditions (especially temperature).

Therefore, when the peak current value of the coil exceeds the predetermined current limit value, a structure for shutting down the inverter is used. However, there is a problem that causes data error in the MST application and causes a great inconvenience to the user .

Korean Patent Laid-Open Publication No. 10-2016-0061228

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to minimize power consumption in power reception, which largely differs from power consumption time, and to realize smooth inverter operation at the time of MST driving due to sharing of an inverter and a rectifier. A wireless power receiving function and a wireless power receiving function for minimizing an excessive initial current and maintaining an over current state that can occur in an MST drive to a normal current state, And an electronic device including a signal transmission function.

According to an aspect of the present invention, there is provided an electronic device including a wireless power receiving function and a wireless signal transmitting function, comprising: a coil for receiving power from outside wirelessly and externally transmitting a designated signal wirelessly; And a switching unit including a signal converting circuit including a plurality of MOSFET switches performing a rectifier function for rectifying the power inputted through the coil and an inverter function for converting a signal to be transmitted to the outside, 1. An electronic device including a wireless power receiving function and a wireless signal transmitting function, comprising: a circuit sharing the inverter function of the wireless signal transmission and the rectifier function of the wireless power reception so that the hardware size of the electronic device is reduced; And an overcurrent smoothing circuit for smoothing a current that deviates from a certain range due to a change in resistance of the coil to reduce a data error of a wireless transmission signal.

And a current controller for preventing a shutdown due to an overcurrent flowing into the inverter, which may occur during an initial operation of the inverter function.

The electronic device may be configured separately from a circuit for supplying the power of the battery to the coil in the inverter function and a circuit for supplying the power supplied from the rectifier function to the battery.

According to another aspect of the present invention, there is provided an electronic device including a wireless power receiving function and a wireless signal transmitting function. The electronic device includes a coil for receiving power from the outside and wirelessly transmitting a designated signal wirelessly, A switching unit including a signal conversion circuit including a plurality of MOSFET switches that are electrically connected to perform a rectifier function for rectifying the power input through the coil and an inverter function for converting a signal to be transmitted to the outside; And a MOSFET switch for operating the rectifier voltage received from the switching unit to be charged with the battery when the switching unit is operated by the rectifier function. And a MOSFET switch for performing an optional operation to operate the battery power to be transmitted to the switching unit when the switching unit is operated by the inverter function or to operate in the sleep state when the switching unit is operated by the rectifier function. ; And a controller for controlling states of a plurality of MOSFET switches constituting a switching unit for receiving power through the switching unit or for transmitting signals from the switching unit.

A MOSFET switch for performing a selection operation to operate the rectifier voltage received from the switching unit to be charged by the battery when the switching unit operates with the rectifier function or to operate in a sleep state when the switching unit is operated by the inverter function, And a power control unit configured to include the power control unit.

Wherein the signal conversion circuit comprises a plurality of MOSFET switches connected in a bridge form for inverter function and rectifier function; Wherein the plurality of MOSFET switches comprise a pair of high-side MOSFET switches having a rectified voltage line as a common line and a pair of low-side MOSFET switches having a common line as a ground line; A coil may be formed between the high-side MOSFET switch and the low-side MOSFET switch.

The load section is connected between the rectification voltage line, which is a common line of the high-side MOSFET switch of the signal conversion circuit, and the battery, and is composed of two MOSFET switches and can be controlled by the duroplane section.

The control unit is provided with a sensor unit for detecting a voltage or a current at both ends of the time coil to be driven by an inverter function, and the voltage value and the current value sensed through the sensor unit can be inputted as a dead time unit.

The dead time portion can be controlled such that the high side MOSFET switch of one side and the low side MOSFET switch of one side are not simultaneously turned on or the high side MOSFET switch of the other side and the low side MOSFET switch of the other side are not simultaneously turned on .

The load section may be configured such that two MOSFET switches face each other and a MOSFET switch on one side and a MOSFET switch on the other side may be provided with a switch for maintaining the ON state such that the voltage between the gate and the source is less than zero volts .

The load unit may be configured such that the switch for maintaining the ON state of the MOSFET switch at one side and the MOSFET at the other side to be a voltage of less than or equal to zero volts is switched to the OFF state at the beginning of the drive function of the inverter function.

The load section operates as a dummy section from the time when the switch for maintaining the ON state of the MOSFET switch on one side and the gate-source voltage of the MOSFET switch on the other side are equal to or lower than zero volts, And the gate voltage of the MOSFET switch on the other side to a voltage higher than the battery voltage.

The load section may be connected to both ends of the MOSFET switch on the other side by a MOSFET switch on one side and a MOSFET switch having a resistance smaller than that on the other MOSFET switch.

The coil may be provided with an attenuating unit for controlling the natural oscillation generated at the beginning of the inverter function and at the completion of the inverter function.

And an overcurrent smoother for limiting the current flowing to the coil due to variation in the resistance value inside the coil to a predetermined current value when the switching unit is operated by the inverter function, .

And a current controller for controlling the rise time of the initial drive current to be delayed when the switching unit is operated by the inverter function.

According to the electronic device including the wireless power receiving function and the wireless signal transmitting function of the present invention as described above, it is possible to reduce the size of the hardware by sharing the inverter of the wireless power transmission and the rectifier of the wireless power reception, It reduces the power consumption of the wireless power receiving unit, reduces the data transmission error by smoothing (OCP Regulation) the overcurrent that may occur in the dispersion of the MST coil product and the environmental condition, and stops the overcurrent due to the over- It is possible to use the portable electronic device conveniently by implementing the rectification function and the inverter function simultaneously while preventing the shutdown.

1 is a circuit diagram showing an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention,
2 is a circuit diagram illustrating an operation of a rectifier constituting an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention,
3 is a circuit diagram illustrating an operation of an inverter constituting an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention,
4 is a diagram illustrating a bootstrap operation and an operation of a high-side N-MOSFET gate driver constituting an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention,
5 is a view for explaining the operation of a general dead time controller,
6 is a view for explaining an operation of a dead time controller constituting an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention,
FIG. 7 is a circuit diagram illustrating the operation of a booster, an Inrush controller, and an attenuator constituting an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention,
8 is a flowchart illustrating an MST operation in an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention,
9 is a diagram illustrating an embodiment for performing an MST operation in an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention,
10 is a circuit diagram showing an embodiment for overcurrent smoothing on MST operation in an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention,
11 is a diagram illustrating an embodiment of controlling the flow of a peak current occurring at the time of initial MST operation in an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention,
12 is a circuit diagram illustrating the operation of a conventional rectifier for wireless power reception,
13 is a circuit diagram illustrating an operation of an inverter for a conventional wireless power transmission.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the present invention.

First, the conventional signal transmitting / receiving circuit can be divided into an AC-to-DC converter mode shown in FIG. 12 and an inverter (DC-to-AC converter) mode shown in FIG.

In the conventional rectifier mode technique, the switching operation of the MOSFET switch of the rectifier and the current of the coil pumped by the inductor coil are converted into a rectified voltage VRECT by using a capacitor, An output of the LDO using a pass transistor connected in a back-to-back manner is supplied to the power manager IC, and the power manager IC provides the internal power of the portable product with a required voltage through an internal switch.

Further, in the conventional inverter mode technology, the current direction of the coil is changed in accordance with the control signal by using the switching operation of the MOSFET switch of the inverter and the inductor coil, and the power source to the inverter is two- Back-to-Back (LDO) is replaced by a role as a load switch instead of the LDO, and the power supplied from the power manager IC is supplied to the power supply of the inverter.

In the above-described conventional inverter technology and rectifier technology, the power transmitted / received through the two pass transistors is transferred in any mode, and there is no direct conflict between the battery and the rectified voltage.

However, as shown in FIG. 12, the operation of the rectifier mode of the prior art shows that there are two series-connected MOSFET switches and a power manager IC in the LDO with a power loss factor existing up to the rectifier voltage line and the power input of the final portable product Lt; RTI ID = 0.0 > switch. ≪ / RTI >

Therefore, the most problem in the above conventional technique for sharing a switch circuit of the same structure in the inverter mode of the power transmission and the rectifier mode of the power reception is that the power loss in the rectifier mode operation is greatly increased.

The reason is that credit card settlement such as MST operation does not always occur but operates in a very short time, but the power receiving operation required for charging the rechargeable battery is performed for a long time.

In the conventional inverter mode technique, the high-side MOSFET switches (135 and 137 in FIG. 13) are generally formed of an N-type MOSFET. In order to drive the N- type MOSFET to a low ON resistance state, a VRECT line 13). ≪ / RTI >

The bootstrap device (104 in Fig. 13) is used for this purpose.

The bootstrap device is configured in the same manner as (104) of FIG. 4, which supplies the "+" power supply of the high side driver in (113), (113_1) "-" Power is supplied from the AC1 / 2 terminal.

The AC1 and AC2 terminals at the initial drive starting point in the prior art inverter mode are floating and the capacitors Cbst1 and Cbst2 of the bootstrap do not have the stored charge, The high-side driver (113, 113_1 in Fig. 4) can not be driven.

In particular, in the control of the switching MOSFETs of the inverter and the rectifier, a dead time controller having a feedback structure such as a dead time controller (FIG. 5) is used in order to eliminate a section in which VRECT and GND are directly connected. The output of the high side driver (604, 608 in FIG. 5) of the dead time controller (FIG. 5) is in the "Low" state because there is no energy supplied to the high side driver.

Therefore, one input of the end logic (601, 609 in FIG. 5) of the dead time controller (FIG. 5) becomes "Low", so that the problem of not responding to the switching input signal occurs.

In the conventional inverter mode, the power source of the inverter is supplied to the VRECT (112 in FIG. 13) through the power manager IC (500 in FIG. 13) and the load switch (401 and 402 in FIG. 13).

11 (A), since the initial value of the capacitor (128 (Crect) in FIG. 13) starts to be "0" when the inverter is driven for the first time, the capacitor VC is instantaneously The peak value of the current becomes the ON resistance / VBAT value of the load switches MNS1 and MNS2 in Fig. 11A, and this current can reach several tens of amperes (A) Under such a condition, there is a problem that the power manager IC (500 of FIG. 12) or the protection device of the battery itself is driven to cause an instantaneous shutdown.

In addition, the coil (141 of FIG. 13) used in the conventional inverter mode has a manufacturing spread, and the current flowing through the coil is limited by the internal resistance of the coil. The internal resistance of the coil is affected.

Therefore, when the peak current value of the coil (141 in FIG. 13) exceeds a predetermined current limit value, a structure of causing the inverter to shut down is used. However, a data error occurs in the MST application, There is a problem that causes discomfort.

1, an electronic device including a wireless power receiving function and a wireless signal transmitting function according to an embodiment of the present invention includes an inverter function (103 in FIG. 1) and a MOSFET switch And the common line of a pair of High Side MOSFET switches (135, 137 in FIG. 1) is VRECT (FIG. 1-122), and a pair of Low Side MOSFET switches 136 and 138 are ground (GND).

One end of a coil (141 in FIG. 1) is connected between the one high-side MOSFET switch 135 and one low-side MOSFET switch 136, and the other end of the high-side MOSFET switch 137 and the other side The other end of the coil (141 in FIG. 1) is connected between the low-side MOSFET switch 138 and a capacitor (128, Crect in FIG. 1) is connected to the VRECT 122, which is a common line of the high- do.

A load switch (130, 131 in FIG. 1) in which two MOSFETs are connected in series is provided between the VRECT 122, which is a common line of the high-side MOSFET switch, and the battery (129 in FIG. 1) (106 and 107 in FIG. 1) connected to the gates of the load switches 130 and 131, respectively.

The high-side MOSFET switches 135 and 137 are connected to the gates of the high-side MOSFET switches 135 and 137, and the low-side MOSFET switches 136 and 138 are connected to the high- And a low-side driver (114 of FIG. 1) for opening the low-side MOSFET switches 136 and 138 is connected to the gate of the low-

A dead time controller (115 of FIG. 1) for controlling the low side MOSFET switches 136 and 138 and the high side MOSFET switches 135 and 137 is connected to the high side driver 113 and the low side driver 114 And a start controller (100 of FIG. 1) is connected to the dead time controller 115 to allow the dead time controller 115 to operate at an early stage.

A bootstrap 104 (shown in FIG. 1) for supplying a boosted voltage to the high-side driver 113 is connected to the high-side driver 113 and a power supply 1 of 105 is connected to the boot strap 104. [

The high-side MOSFET switches 135 and 137 in the inverter function and the low-side MOSFET switches 135 and 137 in the inverter function are interposed between the MOSFET switch 130 and the MOSFET switch 131 on one side of the load switch (130 and 131 in FIG. 1) An overcurrent smoother (108 in FIG. 1, OCP Regulator) for controlling the overcurrent flowing into the MOSFET switches 136 and 138 is connected.

An initial current controller (111 in Fig. 1) for controlling the initial drive current in the inverter function is connected from the start controller 100, and a natural oscillation of the coil 141 in the inverter function is provided The damper control (112 in FIG. 1) is connected to a switch 140 provided at both ends of the coil 141 so as to be short-circuited.

Alternatively, the switches 140 and 138 may be turned on without separately providing the switch 140.

As shown in Fig. 2, the radio signal transmission for the inverting function and the switches (135, 136, 137 and 138 in Figs. 2 and 3) of the hardware structure of the radio power receiving apparatus for the rectifier function, ) Is very similar in structure, but technically the characteristics of the signals such as transmission and reception are different, and the means for supplying the signal and the means for receiving the power are required to have opposite functions.

Where the rectified voltage of the wireless power receiver can rise to 20V and if the same switch circuit (135, 136, 137, 138 in Figures 2 and 3) is shared in the wireless power transmission, the VRECT The voltage difference between the rectified voltage and the battery voltage to be supplied to the battery cells 112 and 112 in FIG. 2 and FIG. 3 is very large, so that means for separating the two voltages is indispensable.

It is easy for a similar technician to know that careful design is necessary because leakage current can be large in such means.

A specific embodiment of the present invention is shown in Fig. 1, and specific examples of the respective parts are described in other drawings.

Figure 1 is a specific embodiment of the present invention.

A switching circuit (103 in FIG. 1) having an inverter function and a rectifier function is composed of four MOSFETs, and is composed of a low-side MOSFET switch consisting of M11L 136 and M22L 138 and M11H 137 and M22H 135 High-side MOSFET switch. At the start point of the inverter operation and at the time when the inverter is stopped, the AC1 node and the AC2 node go into a floating state. Under these conditions, natural oscillation may occur. Of 140, Damper).

The attenuator must select the attenuation time and the resistance value of the attenuator (140 in FIG. 1) in consideration of the resonance frequency and energy of the coil (141 in FIG. 1) May be configured as a MOSFET switch that receives a damper enable signal from an attenuator (140 in FIG. 1) as in (140) of FIG.

There is a low side driver (114 in FIG. 1) for driving the M11L 136 and M22L 138 and a high side driver 113 in FIG. 1 for driving the M11H 137 and the M22H 135 .

In the case of M11H (137) and M22H (135), an N-type MOSFET is typically used for the on-resistance (Ron) value problem and a bootstrap (104 in FIG. 1) is used to achieve a sufficient on- do.

The boot strap 104 is connected to the positive terminal of D1 and the positive terminal of D2 by using the capacitors Cbst1 and Cbst2 and the diodes D1 and D2 as shown in FIG. Cbst1 is connected, the AC1 terminal is connected to Cbst1, the Cbst2 is connected to the negative terminal of D2, and the AC2 terminal is connected to Cbst2, and its operation is as shown in Fig.

A common terminal connected between the positive terminal of the bootstrap diodes D1 and D2 is connected to a voltage source (typically 3V or 5V, 105), and when the node state of AC1 or AC2 is "0V ", a voltage source The voltage of V (BST1) and V (BST2) rises by VRECT + Vc (bst1) and VRECT + Vc (bst2) when the AC1 or AC2 node voltage rises to VRECT Thereby generating a voltage.

This boosted voltage is supplied to the high side driver (113_1 of FIG. 4) such as 113 in FIG. 4 as the "+" power source and the "-" power of the high side driver 113_1 High "state voltage applied to the gates of the high-side MOSFET switches M11H, M22H is supplied with a voltage higher than the voltage VRECT of its drain voltage by the voltage of the voltage supply source (105 in FIG. 1) , And lowers the on-resistance characteristics of the high-side MOSFET switches M11H and M22H to the maximum.

The magnetic field induced in the Tx AC coil (201 in FIG. 2) in the coil (141 in FIG. 1) existing between AC1 and AC2 moves the node voltage or current of AC1 and AC2, (Not shown) or a voltage detecting means (not shown) inside the power supply circuit (127 in FIG. 1).

The AC1 / AC2 crossing sensor 127 enters the input of a dead time controller (115 in FIG. 1).

The dead time controller 115 determines that the M11L 136 and the M22H 135 are simultaneously turned ON and the M22L 138 and the M11H 137 are simultaneously turned ON between VRECT and GND (Non-Overlap). As shown in FIG. 5, the general structure is a structure of a RS flip-flop having feedback.

(606, 607 in FIG. 5) on the basis of the most delayed points (M22H_Gate, M11H_Gate in FIG. 5) on the operation of the rectifier or the inverter, thereby creating a section that does not overlap with each other.

Here, the power supply of the high side driver (604 and 608 in FIG. 5) becomes the voltage V (Bst1) or V (Bst2) which is the result of the bootstrap operation as described above. In the initial drive state of the inverter, Since the stored energy is not present, the output of the high side driver (604, 608 of FIG. 5) is set to the "Low" state.

Therefore, the configuration of the dead time controller for driving the same is shown in FIG.

6, the switching input data (SWIN in FIG. 6) of the inverter operation is generally transferred from an AP (Application Processor) of the portable device, and the node 2 (Node2 in FIG. 6) The node 1 (Node1 in Fig. 6) signal is prevented from entering the AND gate (601 and 612 in Fig. 6), and the SWIN signal as the MST data drives the low side driver (602 and 615 in Fig. 6).

As a result, energy is stored in the capacitors (Cbst1 and Cbst2 in FIG. 1) inside the above bootstrap (104 in FIG. 1) so that the high-side driver (604 and 608 in FIG. 6) Respectively.

An example of the operation device according to this initial inverter drive is the same as the structure of (613) in FIG. 6, and the timing diagram according to the operation is the same as that of (614) in FIG. 6. In the method shown in the embodiment, The feedback of the dead-time controller is blocked until the rising edge, and the direct drive is performed.

1) is supplied to the power source of the inverter mode (103 in FIG. 1), but in the rectifier mode (103 in FIG. 1) Of 129).

For such a role, the two MOSFETs must be in a back-to-back form facing each other, and the form thereof is the same as that of FIG. 1 (110) Load Switch.

The gate-source voltage of the MNS1 (130 in FIG. 1) of the load switch (110 in FIG. 1) must be a voltage of "0 V" or "-" The gate-source voltage must also be a "0 V" or "-" voltage.

SW1 (132 in FIG. 1) and SW2 (133 in FIG. 1) are connected to the MNS1 130 (FIG. 1) as a means for making the gate-source voltage of the MNS1 130 and the MNS2 131 the "0 V" And the source terminal and the gate terminal of the MNS2 131 and the source terminal of the MNS1 131 and the MNS2 131. The configuration is such that the directions of the MNS1 130 and the MNS2 131 are symmetrically changed and SW1 1) 132 and SW2 (133 in FIG. 1) are connected to each other (150 in FIG. 1).

The state in which the gate-source voltage of the MNS1 130 and the MNS2 131 is a "0 V" or "-" voltage must be maintained for a certain period of time in the initial stage of MST driving. SW3 (134 in FIG. 1) is connected between the battery (129 in FIG. 1) and VRECT (122 in FIG. 1) And can be turned on at all times.

However, the MNS1 (130 in FIG. 1) and the MNS2 (131 in FIG. 1) must be inhibited from being operated by SW1 (132 in FIG. 1) and SW2 (133 in FIG. 1) The SW1 132 and the SW2 133 must be off.

7, an RX 134_1 connected to the VBAT and an SW30 134_2 connected to the RX are grounded, and a MOSFET (not shown) is connected between the RX and the SW30. The switch SW_30 (134_2 in FIG. 7) is turned on in a section where the switch 134_3 is to be turned on and the current from the battery is supplied to the capacitor 134_3 through the P- (128 in Fig. 7, Crect) is slowly charged.

7) is turned off, and the voltage between the gate and the source of the P-type MOSFET (134_3 in FIG. 7) becomes "0" Structure.

1) of the SW1 132 and the SW2 133 are turned on and the gate voltage of the MNS1 130 and the MNS2 131 is switched to a battery 129 ) Voltage.

In this case, a separate switch is required between the gates of the MNS1 130 and the MNS2 131 and the doubler, will be.

In the present invention, the boosted outputs of the doublers (106 and 107 in FIG. 1) are connected only to the gates of the MNS1 130 and the MNS2 131 to minimize the capacitors constituting the doubler, One example is shown in Figure 7

The doubler in the present invention uses a diode D12 (106_2 in FIG. 7) and D22 (107_2 in FIG. 7) in a charge pumping period for a structure in which no level shifter for boosting a voltage is required SWD12 and SWD22 are used to charge CF11 (106_5 in FIG. 7) and CF22 (107_5 in FIG. 7), respectively. To turn on SWD12 and SWD22, It is an unnecessary structure.

The above SW1 (130 in FIG. 1) is the same as SWE12 (132 in FIG. 7), and the driving voltage thereof is also structured to not require a boosted voltage.

Also, SW2 (133 in FIG. 1) is the same as SWE22 (133 in FIG. 7), and the driving voltage thereof does not need a boosted voltage.

This operation causes the boosted energy to be transmitted only to the gates of the MNS1 130 and the MNS2 131, so that the energy loss is minimized during the boost operation, and at the same time, the energy of the CF (106_5 and 107_5 in FIG. 7) Minimize the size and make the hardware size small.

Problems caused by variation in the internal resistance value due to dispersion of manufacturing and environmental factors of the coils (141 in FIG. 1) required for MST driving have been described above, and the embodiments of the overcurrent smoothing circuit (OCP regulator 108) As shown in Fig.

The switching elements of the inverter take the form of several separate elements, and are formed in the form of (135, 136, 137, 138) in FIG. 10, in which the drain and the source are common and the gate is separated.

The gate signals are named VG_HS <8: 0> in the case of high side and VG_LS <8: 0> in case of low side. These signals are referred to as a reference voltage source (251 in FIG. 10) 252, the present current level is checked and the result is stored in each D-FF.

The current signal is detected by a current detector (250 in FIG. 10), and there are various detection methods, but a specific implementation method is not shown in the present invention.

The stored D-FF state is input to the controller 253 of FIG. 10, and the controller 253 of FIG. 10 selects one of the switches M22H and M11L allowed for MST driving according to the synchronization of the MST data input. , One of M22L and M11H), the stored value of the D-FF is reflected.

Only when the MST coil current is out of a certain range, it is reflected at the starting or ending point of the bit of the next inputted MST data to prevent the error of the MST data due to the change of the current amount.

As one of the above adjustment methods, the values stored in the D-FF can be reflected at a time for quick response, and can be sequentially reflected according to the input data bit order.

In the above description, the time factor necessary for implementing the inverter operation is as shown in FIG. 8, and the SLEEP signal is used as a means for validating the MST data, as shown in FIG.

The actual MST data is HD_IN (Fig. 8). Inrush_EN (Fig. 8) for operating the SW3 (134 in Fig. 1) and Doubler_Start ), HDvier Enable (FIG. 8) for allowing MST data, and Damper Enable (FIG. 8) for operating the attenuator (140 in FIG. 1) As shown, each signal waveform is provided so that a technician in the same field can be implemented.

Recently, portable products that can be charged wirelessly are being widely introduced. Also, products with MST function are increasing in number. The present invention has been made to solve the above problems, and it is an object of the present invention to provide an MST communication system, And to provide an electronic device ensuring a function of stable operation.

In addition, an electronic device including a wireless power receiving function and a wireless signal transmitting function according to the present invention can be manufactured as one on-chip and incorporated into an electronic device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, It will be readily apparent that various substitutions, modifications, and alterations can be made herein.

Claims (17)

A coil for receiving power from the outside wirelessly and externally transmitting a designated signal wirelessly; a rectifier function electrically connected to the coil to rectify the power input through the coil; and an inverter And a switching unit including a signal conversion circuit composed of a plurality of MOSFET switches that perform a function of the electronic device, wherein the electronic device includes a wireless power receiving function and a wireless signal transmitting function, So as to configure the circuit by sharing the inverter function of the wireless signal transmission and the rectifier function of the wireless power reception; And an overcurrent smoothing circuit for smoothing a current which deviates from a certain range due to a change in resistance of the coil to reduce data error of a wireless transmission signal;
And an overcurrent smoother for limiting the current flowing to the coil due to variation in the resistance value inside the coil to a predetermined current value when the switching unit is operated by the inverter function, And a wireless signal transmission function. The electronic device according to claim 1, further comprising a current controller for preventing a shutdown due to an overcurrent flowing into the inverter, which may occur during an initial operation of the inverter function. . The electronic device according to claim 1, wherein the electronic device is configured such that a circuit for supplying power from the battery to the coil in the inverter function and a circuit for supplying power from the battery to the battery are separately formed, Function and a wireless signal transmission function. A coil for receiving power from the outside wirelessly and externally transmitting a designated signal wirelessly; a rectifier function electrically connected to the coil for rectifying the power inputted through the coil; and an inverter function for converting a signal to be transmitted to the outside A switching unit including a signal conversion circuit composed of a plurality of MOSFET switches for performing a switching operation; And a MOSFET switch for operating the rectifier voltage received from the switching unit to be charged with the battery when the switching unit is operated by the rectifier function. And a MOSFET switch for performing an optional operation to operate the battery power to be transmitted to the switching unit when the switching unit is operated by the inverter function or to operate in the sleep state when the switching unit is operated by the rectifier function. And a controller for controlling states of a plurality of MOSFET switches constituting a switching unit for receiving power through the switching unit or for transmitting a signal from the switching unit;
Wherein the coil includes an attenuating unit that controls a natural oscillation generated at the start of the inverter function and at the completion of the inverter function. The method of claim 1 or 4, wherein when the switching unit is operated by a rectifier function, the rectifier voltage transmitted from the switching unit is operated to be charged with the battery, or the switching unit operates in a sleep state when the switching unit is operated by the inverter function And a power supply control unit configured to include a MOSFET switch for performing an optional operation to cause the power supply to be turned on. The signal conversion circuit according to claim 1 or 4, wherein the signal conversion circuit comprises a plurality of MOSFET switches connected in the form of a bridge for an inverter function and a rectifier function; Wherein the plurality of MOSFET switches comprise a pair of high-side MOSFET switches having a rectified voltage line as a common line and a pair of low-side MOSFET switches having a common line as a ground line; And a coil is formed between the high-side MOSFET switch and the low-side MOSFET switch. 5. The wireless communication device according to claim 4, wherein the rod section is connected between a rectification voltage line, which is a common line of the high-side MOSFET switch of the signal conversion circuit, and the battery, and is composed of two MOSFET switches and controlled by a duroplet part. Receiving function and a radio signal transmitting function. [Claim 4] The apparatus of claim 4, wherein the control unit is provided with a sensor unit for detecting a voltage or a current at both ends of a time coil to be driven by an inverter function, and a voltage value and a current value sensed through the sensor unit are input as a dead time unit A wireless power receiving function and a wireless signal transmitting function. [10] The method of claim 8, wherein the dead time portion is set such that the high side MOSFET switch of one side and the low side MOSFET switch of one side are not simultaneously turned on, or the high side MOSFET switch of the other side and the low side MOSFET switch of the other side are not simultaneously turned on And a wireless signal transmission function. The load unit according to claim 4, wherein the load unit is configured such that two MOSFET switches are opposed to each other, and a switch for maintaining the ON state of the MOSFET switch on one side and the MOSFET switch on the other side, And a wireless signal transmission function. The load unit according to claim 4, wherein, in the initial stage of the drive of the inverter function, the load unit switches the switch for maintaining the ON state so that the gate-source voltage of one MOSFET switch and the other MOSFET switch are less than zero volts, And a wireless signal transmission function. The load unit according to claim 4, wherein the load unit includes a dummy load unit for performing a dummy load operation from a time point when a switch for maintaining the ON state of the MOSFET switch at one side and a gate- So that the gate voltage of one MOSFET switch and the MOSFET switch of the other MOSFET are raised to a voltage higher than the battery voltage, and the wireless signal transmitting function. 5. The electronic device according to claim 4, wherein the rod section is connected to both ends of the MOSFET switch on the other side by a MOSFET switch of one side and a MOSFET switch of less resistance than the MOSFET switch of the other side, . delete delete The wireless communication device according to any one of claims 1 to 4, further comprising a current controller for controlling the rise time of the initial driving current to be delayed when the switching unit is operated by the inverter function. Lt; / RTI &gt; An electronic device including a wireless power receiving function and a wireless signal transmitting function, wherein the electronic device including the wireless power receiving function and the wireless signal transmitting function according to claim 1 or 2 is configured as one on-chip.

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