KR100608709B1 - Battery protection circuit of mobile phone - Google Patents

Battery protection circuit of mobile phone Download PDF

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KR100608709B1
KR100608709B1 KR1020010043435A KR20010043435A KR100608709B1 KR 100608709 B1 KR100608709 B1 KR 100608709B1 KR 1020010043435 A KR1020010043435 A KR 1020010043435A KR 20010043435 A KR20010043435 A KR 20010043435A KR 100608709 B1 KR100608709 B1 KR 100608709B1
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battery
protection circuit
resistor
cmos
control signal
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KR1020010043435A
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KR20030008610A (en
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김상우
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엘지전자 주식회사
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/108—Normal resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/30—Fuel cells in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Protection Of Static Devices (AREA)

Abstract

본 발명은 휴대폰의 배터리 보호회로에 관한 것으로서, 과전류, 과전압, 과열 등으로 부터 배터리를 보호하기 위한 회로를 각각 분리 시켜 구성한 휴대폰의 배터리 보호회로에 관한 것이다. 이를 위하여 본 발명은 배터리의 온도를 감지하기 위한 더미스터와, 아답타에서 입력되는 과전압/역전압으로 부터 배터리를 보호하기 위한 과전압/역전압 보호회로와, 상기 과전압/역전압 보호회로로 부터 입력 받은 전원을 도통 제어하는 제2씨모스와, 상기 제2씨모스에서 입력되는 전원이 과전류이면 과전류검출 제어신호를 출력하는 과전류 보호회로와, 상기 과전류 보호회로의 출력 전원을 입력 받고 배터리의 전류가 누설되는 것을 방지하는 제2다이오드와, 상기 제2씨모스의 출력 전원을 입력 받아 구동되고 상기 더미스터의 출력 신호를 입력 받아 상기 배터리가 과열되면 과열검출 제어신호를 출력하는 온도 보호회로와, 상기 제2다이오드의 출력 전원을 입력 받아 휴대폰을 구동시키고, 상기 과전류 보호회로의 과전류검출 제어신호와 온도 보호회로의 과열검출 제어신호를 입력 받아 상기 배터리의 충전을 위한 충전 제어신호를 출력하는 충전제어회로와, 상기 충전제어회로의 충전 제어신호에 의해 도통제어를 받아 상기 제2다이오드를 통한 전원을 상기 배터리에 충전하는 제3씨모스와, 상기 제3씨모스로 입력 되는 전원을 감시하여 정전압/정전류가 아니면 상기 제2씨모스를 턴오프 시키는 제어신호를 출력하는 정전압/정전류 감시회로로 구성된다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery protection circuit of a mobile phone, and more particularly to a battery protection circuit of a mobile phone configured by separating circuits for protecting a battery from overcurrent, overvoltage, overheating, and the like. To this end, the present invention is a dummyster for sensing the temperature of the battery, an overvoltage / reverse voltage protection circuit for protecting the battery from the overvoltage / reverse voltage input from the adapter, and received from the overvoltage / reverse voltage protection circuit A second CMOS for controlling the conduction of the power supply, an overcurrent protection circuit for outputting an overcurrent detection control signal when the power input from the second CMOS is overcurrent, and an output power of the overcurrent protection circuit is input, and a current of the battery is leaked. A second diode configured to prevent the battery from being turned on, a temperature protection circuit driven by receiving the output power of the second CMOS, and receiving an output signal of the dummyster and outputting an overheat detection control signal when the battery is overheated; The mobile phone is driven by receiving the output power of 2 diodes, and the overcurrent detection control signal and temperature compensation of the overcurrent protection circuit A charge control circuit that receives an overheat detection control signal of a circuit and outputs a charge control signal for charging the battery, and receives a conduction control by a charge control signal of the charge control circuit to supply power through the second diode to the battery; And a constant voltage / constant current monitoring circuit for monitoring a power source inputted to the third CMOS, and outputting a control signal for turning off the second CMOS when it is not a constant voltage / constant current.

Description

휴대폰의 배터리 보호회로{CIRCUIT TO PROTECT BATTERY FOR MOBILE PHONE}Battery protection circuit for mobile phone {CIRCUIT TO PROTECT BATTERY FOR MOBILE PHONE}

도 1은 종래의 휴대폰 배터리 보호 회로를 보인 회로도.1 is a circuit diagram showing a conventional mobile phone battery protection circuit.

도 2는 본 발명 휴대폰 배터리 보호 회로를 보인 회로도.Figure 2 is a circuit diagram showing a mobile phone battery protection circuit of the present invention.

*** 도면의 주요 부분에 대한 부호의 설명 ****** Explanation of symbols for the main parts of the drawing ***

10 : 아답타 120 : 과전압/역전압 보호회로
130 : 과전류 보호회로 140 : 충전제어회로
150 : 온도보호회로 160 : 정전압/정전류 감시회로10: adapter 120: overvoltage protection circuit
130: overcurrent protection circuit 140: charge control circuit
150: temperature protection circuit 160: constant voltage / constant current monitoring circuit

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삭제delete

본 발명은 휴대폰의 배터리 보호 회로에 관한 것으로, 특히 배터리에 흐르는 과전류, 과전압, 과열 등으로 부터 배터리를 보호하는 휴대폰의 배터리 보호회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery protection circuit of a mobile phone, and more particularly, to a battery protection circuit of a mobile phone that protects a battery from overcurrent, overvoltage, overheating, etc. flowing through the battery.

도 1은 종래의 휴대폰 배터리 보호 회로를 보인 회로도로서, 이에 도시된 바와 같이 소프트웨어적으로 배터리를 보호하는 전원관리부(20)와, 아답타(10)로 부터 입력 받은 전원을 상기 전원관리부(20)로 출력하는 제1노드(N1)와, 상기 전원관리부(20)의 제어신호에 의해 상기 제1노드(N1)의 출력 전류를 입력 받아 도통제어되는 제1씨모스(Q1)와, 상기 제1씨모스(Q1)의 출력 전류를 저항(R)을 통하여 입력 받는 다이오드(D)와, 상기 다이오드(D)의 출력 전압을 입력 받아 상기 전원관리부(20)로 출력하는 제2노드(N2)와, 상기 제2노드(N2)의 출력 전원을 입력 받아 휴대폰에 전원을 공급하기 위한 휴대폰 전원공급단자(30)와, 상기 제2노드(N2)의 출력 전원을 입력 받아 상기 전원관리부(20)의 제어신호에 의해 도통제어되는 제2씨모스(Q2)와, 상기 제2씨모스(Q2)의 출력 전원을 입력 받아 충전되는 배터리(50)와, 상기 배터리(50)의 온도를 검출하여 상기 전원관리부(20)로 전기적인 신호를 출력하는 더미스터(51)와, 상기 전원관리부(20)의 출력신호를 입력 받아 상기 전원관리부(20)로 배터리(50)를 보호하기 위한 제어신호를 출력하는 엠에스엠(40)(Mobile Station Modem)으로 구성된다.1 is a circuit diagram showing a conventional mobile phone battery protection circuit, as shown in the power management unit 20 to protect the battery in software, and the power input from the adapter 10 to the power management unit 20 A first node Q1 that is output, a first CMOS Q1 that is electrically controlled by receiving the output current of the first node N1 by a control signal of the power management unit 20, and the first seed A diode (D) receiving the output current of the MOS (Q1) through the resistor (R), a second node (N2) receiving the output voltage of the diode (D) and outputting it to the power management unit (20), Control of the power management unit 20 by receiving the output power of the second node (N2) receives the output power of the mobile phone power supply terminal 30 for supplying power to the mobile phone and the output power of the second node (N2) Output power of the second CMOS Q2 and the second CMOS Q2 that are electrically controlled by a signal; A battery 50 to be charged and charged, a dummyster 51 which detects a temperature of the battery 50 and outputs an electrical signal to the power management unit 20, and an output signal of the power management unit 20. It is composed of an MS 40 (Mobile Station Modem) receiving the input and outputs a control signal for protecting the battery 50 to the power management unit 20.

상기 전원관리부(20)는 하나의 칩으로 구현되어 있으며 상기 제1노드(N1)의 출력 전압을 입력 받아 아답타(10)에서 출력되는 전압을 감지하기 위한 아답타전압 감지단자(P1)와, 상기 제1씨모스(Q1)로 제어신호를 출력하여 배터리(50)로 입력되는 전원이 정전압/정전류가 아니면 제1씨모스(Q1)를 턴 오프시키는 정전압/정전류 제어단자(P2)와, 상기 저항(R)의 양단에 걸리는 전압을 감지하여 배터리(50)에 충전되는 전류를 감지하기 위한 배터리 충전전류 감지단자(P3,P4)와, 제2노드(N2)의 출력전압을 입력 받아 배터리(50)에 충전되는 전압을 감지하기 위한 배터리 충전전압 감지단자(P5)와, 상기 제2씨모스(Q2)로 제어신호를 출력하여 배터리(50)에 공급되는 전원을 온/오프시키는 배터리충전 제어단자(P6)와, 상기 더미스터(51)의 출력 신호를 입력 받아 배터리(50)의 온도를 감지하기 위한 온도감지단자(P7)와, 상기 엠에스엠(40)과 제어신호를 교환하기 위한 엠에스엠단자(P8)로 구성된다.The power management unit 20 is implemented as a single chip, and receives an output voltage of the first node N1 and an adapter voltage sensing terminal P1 for sensing a voltage output from the adapter 10 and the first voltage. A constant voltage / constant current control terminal P2 for outputting a control signal to the first CMOS Q1 to turn off the first CMOS Q1 when the power input to the battery 50 is not a constant voltage / constant current; The battery 50 receives input voltages of the battery charging current detection terminals P3 and P4 and the output voltages of the second node N2 for sensing the voltage applied to both ends of R) to detect the current charged in the battery 50. Battery charge control terminal (P5) for sensing the voltage charged in the battery charge control terminal for outputting a control signal to the second CMOS (Q2) to turn on / off the power supplied to the battery ( P6) and the temperature of the battery 50 by receiving the output signal of the dummy (51) It consists of a temperature detection terminal (P7), and a MSM terminal (P8) for the exchange of the MSM 40 and a control signal for detection.

이와 같이 구성된 종래의 휴대폰 배터리 보호 회로에 있어서, 전원관리부(20)는 아답타전압 감지단자(P1)를 통하여 아답타(10)의 출력 전압을 감지하고, 배터리 충전전류 감지단자(P3,P4)를 통하여 배터리(50)를 충전시키는 전류의 세기를 감지하고, 배터리 충전전압 감지단자(P5)를 통하여 배터리(50)를 충전시키는 전압의 크기를 감지한다. 또한, 전원관리부(20)는 온도감지단자(P7)를 통하여 배터리(50)의 온도를 감지하게 된다. 이와 같이 전원관리부(20)는 아답타전압, 배터리 충전전류, 배터리 충전전압, 배터리 온도를 디지털신호로 변환 입력받아 소프트웨어적으로 처리하고, 이 소프트웨어적으로 처리된 디지털신호를 엠에스엠(40)으로 전송한다. 상기 엠에스엠(40)은 아답타전압, 배터리 충전전류, 배터리 충전전압, 배터리 온도에 이상이 있을 시 상기 전원관리부(20)로 제어신호를 출력하여, 그 전원관리부(20)의 소프트웨어적인 제어로 제1씨모스(Q1)와 제2씨모스(Q2)를 턴오프시켜 아답타(10)의 전원공급을 차단시키거나 배터리 충전 전원을 차단시켜 배터리(50)를 보호하게 된다.In the conventional mobile phone battery protection circuit configured as described above, the power management unit 20 detects the output voltage of the adapter 10 through the adapter voltage detection terminal (P1), and through the battery charging current detection terminals (P3, P4) The strength of the current charging the battery 50 is sensed, and the magnitude of the voltage charging the battery 50 is sensed through the battery charge voltage detection terminal P5. In addition, the power management unit 20 detects the temperature of the battery 50 through the temperature detection terminal (P7). As such, the power management unit 20 converts the adapter voltage, the battery charging current, the battery charging voltage, and the battery temperature into a digital signal, processes the software, and transmits the digitally processed digital signal to the MS 40. do. The MS 40 outputs a control signal to the power manager 20 when there is an abnormality in the adapter voltage, the battery charge current, the battery charge voltage, or the battery temperature, and is controlled by software control of the power manager 20. The first CMOS Q1 and the second CMOS Q2 are turned off to cut off the power supply of the adapter 10 or to cut off the battery charging power to protect the battery 50.

따라서, 종래에는 하나의 칩으로 구현되어 있으며 엠에스엠의 제어신호를 입력 받아 소프트웨어적으로 전원관리부를 제어하여 과전류, 과전압과 과열로 부터 배터리를 보호하는 장치를 사용하고 있다.Therefore, in the related art, a single chip is used and a device which protects the battery from overcurrent, overvoltage and overheating by controlling the power management unit by receiving the control signal of the MS is software.

그러나, 상기와 같은 종래의 기술에 있어서, 전원관리부가 하나의 칩으로 구현되어 있기 때문에 아답타로 부터 이상전원 공급 등의 이유로 전원관리부의 자체 불량 또는 고장이 발생될 경우 소프트웨어적으로 제어가 불가능하게 되어 배터리가 손상되는 문제점이 있다. 예를 들어, 전원관리부가 동작을 못하게 되면 도 1의 제1씨모스, 저항, 다이오드, 제2씨모스를 통하여 직접 충전이 되기 때문에 과전류에 의해 배터리의 온도가 상승되어 배터리가 손상된다.However, in the conventional technology as described above, since the power management unit is implemented as a single chip, software failure to control itself is not possible when a failure or failure of the power management unit occurs due to abnormal power supply from the adapter. There is a problem that the battery is damaged. For example, if the power management unit fails to operate, the battery is directly charged through the first CMOS, the resistor, the diode, and the second CMOS of FIG. 1, thereby increasing the temperature of the battery due to overcurrent, thereby damaging the battery.

따라서, 상기와 같은 문제점을 감안하여 창안한 본 발명은, 과전류, 과전압, 과열상태 등을 하드웨어적으로 각기 직접 검출하고, 그 각 검출상태에 따라 배터리를 보다 신속하고 안정되게 보호하기 위한 하드웨어 구성의 휴대폰의 배터리 보호회로를 제공함에 그 목적이 있다.Accordingly, the present invention devised in view of the above-described problems is a hardware configuration for directly detecting an overcurrent, an overvoltage, an overheat state, and the like in hardware, and protecting the battery more quickly and stably in accordance with each detected state. The purpose is to provide a battery protection circuit of the mobile phone.

상기와 같은 목적을 달성하기 위한 본 발명은, 배터리의 온도를 감지하기 위한 더미스터와, 아답타에서 입력되는 과전압/역전압으로 부터 배터리를 보호하기 위한 과전압/역전압 보호회로와, 상기 과전압/역전압 보호회로로 부터 입력 받은 전원을 도통 제어하는 제2씨모스와, 상기 제2씨모스에서 입력되는 전원이 과전류이면 과전류검출 제어신호를 출력하는 과전류 보호회로와, 상기 과전류 보호회로의 출력 전원을 입력 받고 배터리의 전류가 누설되는 것을 방지하는 제2다이오드와, 상기 제2씨모스의 출력 전원을 입력 받아 구동되고 상기 더미스터의 출력 신호를 입력 받아 상기 배터리가 과열되면 과열검출 제어신호를 출력하는 온도 보호회로와, 상기 제2다이오드의 출력 전원을 입력 받아 휴대폰을 구동시키고, 상기 과전류 보호회로의 과전류검출 제어신호와 온도 보호회로의 과열검출 제어신호를 입력 받아 상기 배터리의 충전을 위한 충전 제어신호를 출력하는 충전제어회로와, 상기 충전제어회로의 충전 제어신호에 의해 도통제어를 받아 상기 제2다이오드를 통한 전원을 배터리에 충전하는 제3씨모스와, 상기 제3씨모스로 입력되는 전원을 감시하여 정전압/정전류가 아니면 상기 제2씨모스를 턴오프시키는 제어신호를 출력하는 정전압/정전류 감시회로로 구성된 것을 특징으로 한다.The present invention for achieving the above object, the dummyster for sensing the temperature of the battery, an overvoltage / reverse voltage protection circuit for protecting the battery from the overvoltage / reverse voltage input from the adapter, and the overvoltage / reverse A second CMOS for controlling conduction of the power input from the voltage protection circuit; an overcurrent protection circuit for outputting an overcurrent detection control signal when the power input from the second CMOS is overcurrent; and an output power supply of the overcurrent protection circuit. A second diode to prevent leakage of the current from the battery and an output power of the second CMOS; and an overheat detection control signal when the battery is overheated by receiving the output signal of the dummy amplifier. The mobile terminal is driven by receiving the temperature protection circuit and the output power of the second diode, and checking the overcurrent of the overcurrent protection circuit. A charge control circuit that receives a control signal and an overheat detection control signal of a temperature protection circuit and outputs a charge control signal for charging the battery; and a second diode under the conduction control by a charge control signal of the charge control circuit. A third voltage for charging the battery through the third CMOS and a constant voltage / constant current monitoring circuit for monitoring a power input to the third CMOS and outputting a control signal for turning off the second CMOS if it is not a constant voltage / constant current. Characterized in that configured.

이하, 본 발명에 의한 휴대폰에 있어서 배터리 보호 회로의 작용 및 효과를 첨부한 도 2를 참조하여 설명한다.Hereinafter, the operation and effect of the battery protection circuit in the mobile phone according to the present invention will be described with reference to FIG.

도 2는 본 발명 휴대폰의 배터리 보호 회로를 보인 회로도로서, 이에 도시된 바와 같이 배터리(170)의 온도를 전기적인 신호로 감지하기 위한 더미스터(TH)와, 아답타(10)로 부터 전원을 입력 받고 상기 아답타(10)의 과전압 및 역전압으로 부터 상기 배터리(170)를 보호하기 위한 과전압/역전압 보호회로(120)와, 상기 과전압/역전압 보호회로(120)를 통해 입력 받은 전원을 도통 제어하는 제2씨모스(C2)와, 상기 제2씨모스(C2)의 출력전원을 입력 받아 출력하고 상기 배터리(170)의 과전류충전을 방지하기 위한 과전류검출 제어신호를 출력하는 과전류 보호회로(130)와, 상기 과전류 보호회로(130)의 출력 전원을 입력 받아 출력하고 상기 배터리(170)의 전류가 누설되는 것을 방지하는 제2다이오드(D2)와, 상기 제2씨모스(C2)의 출력 전원을 입력 받고 상기 배터리(170)의 온도를 검출하는 더미스터(TH)의 출력 신호를 입력 받아 배터리(170)가 과열되는 것을 방지하기 위한 과열검출 제어신호를 출력하는 온도 보호회로(150)와, 상기 제2다이오드(D2)의 출력 전원을 입력 받아 휴대폰을 구동시키고, 상기 과전류 보호회로(130)의 과전류검출 제어신호와 온도 보호회로(150)의 과열검출 제어신호를 입력 받아 상기 배터리(170)의 충전을 위한 충전제어신호를 출력하는 충전제어회로(140)와, 상기 충전제어회로(140)의 충전제어신호에 의해 도통 제어를 받아 상기 제2다이오드(D2)를 통한 전원을 상기 배터리(170)에 충전하는 제3씨모스(C3)와, 상기 제3씨모스(C3)로 출력되어 배터리(170)를 충전시키는 전압과 전류를 감시하여 정전압/정전류가 아니면 상기 제2씨모스(C2)를 턴오프시키는 제어신호를 출력하여 배터리 충전 전원을 차단하는 정전압/정전류 감시회로(160)로 구성된다.FIG. 2 is a circuit diagram illustrating a battery protection circuit of the mobile phone according to the present invention. As shown therein, a dummyster TH for sensing a temperature of the battery 170 as an electrical signal and a power input from the adapter 10 are input. Conducting power supplied through an overvoltage / reverse voltage protection circuit 120 and the overvoltage / reverse voltage protection circuit 120 to protect the battery 170 from overvoltage and reverse voltage of the adapter 10. An overcurrent protection circuit for receiving and outputting the second CMOS C2 to be controlled and the output power of the second CMOS C2 and outputting an overcurrent detection control signal for preventing overcurrent charging of the battery 170 ( 130, a second diode D2 for receiving and outputting the output power of the overcurrent protection circuit 130, and preventing the current of the battery 170 from leaking, and an output of the second CMOS C2. Turn on the battery 170 after receiving power A temperature protection circuit 150 for outputting an overheat detection control signal for preventing the battery 170 from being overheated by receiving an output signal of the dummyster TH detecting the power supply; and output power of the second diode D2. Receives the input to drive the mobile phone, and receives the overcurrent detection control signal of the overcurrent protection circuit 130 and the overheat detection control signal of the temperature protection circuit 150 to output a charge control signal for charging the battery 170 A third CMOS C3 that receives conduction control by a charge control circuit 140 and a charge control signal of the charge control circuit 140, and charges the battery 170 with power through the second diode D2. ), And outputs a control signal for monitoring the voltage and current output to the third CMOS C3 to charge the battery 170 and turning off the second CMOS C2 when the voltage is not constant / constant. Constant voltage to cut off the charging power It consists of a current monitoring circuit (160).

상기 과전압/역전압 보호회로(120)는 아답타(110)의 출력전원을 순방향 입력받아 출력하는 제1다이오드(D1)와, 상기 제1다이오드(D1)에 역방향 바이어스 연결되어 상기 제1다이오드(D1)의 출력 전원을 입력 받아 과전압이 되면 도통되는 제너다이오드(ZD1)와, 상기 제너다이오드(ZD1)의 타단에 연결되어 접지된 제1저항(R1)과, 상기 제1다이오드(D1)의 출력 전원을 콜렉터로 입력 받아 상기 제너다이오드(ZD1)에 과전압이 인가되면 상기 제1저항(R1)에 걸리는 전압을 제어신호로 입력 받아 도통되는 제1트랜지스터(TR1)와, 상기 제1트랜지스터(TR1)의 에미터에 연결되고 타단이 접지된 제2저항(R2)과, 상기 제2저항(R2)에 걸리는 전압을 제어신호로 입력 받아 상기 제1다이오드(D1)의 출력 전원을 도통 제어하여 상기 제2씨모스(C2)로 출력하는 제1씨모스(C1)로 구성된다.The overvoltage / reverse voltage protection circuit 120 has a first diode D1 that receives the output power of the adapter 110 in a forward direction, and outputs the first diode D1 in a reverse bias connection to the first diode D1. The output power of the first diode R1 connected to the other end of the zener diode ZD1, the zener diode ZD1 connected to the ground, and the first diode R1 connected to the other end of the zener diode ZD1 when the output power of the When the over voltage is applied to the zener diode ZD1 through the collector, the first transistor TR1 and the first transistor TR1 are connected to receive the voltage applied to the first resistor R1 as a control signal. The second resistor R2 connected to the emitter and grounded at the other end and the voltage applied to the second resistor R2 are inputted as a control signal to control conduction of the output power of the first diode D1. It consists of the 1st CMOS C1 output to the CMOS C2.

상기 과전류 보호회로(130)는 상기 제2씨모스(C2)의 출력 전원을 제3저항(R3)을 통하여 입력 받고 타단이 접지되어 기준전압을 생성하는 제4저항(R4)과, 상기 제2씨모스(C2)의 출력 전원을 입력 받아 상기 제2다이오드(D2)로 출력하는 제5저항(R5)과, 상기 제5저항(R5)의 출력 전원을 제6저항(R6)을 통하여 입력 받고 타단이 접지된 제7저항(R7)과, 상기 제4저항(R4)에 걸리는 전압을 비반전단자로 입력 받고 상기 제7저항(R7)에 걸리는 전압을 반전단자로 입력받아, 그 입력받은 두 전압을 비교하여 상기 충전제어회로(140)로 과전류검출 제어신호를 출력하는 제1비교기(IC1)로 구성된다.The overcurrent protection circuit 130 receives a fourth resistor (R4) for receiving the output power of the second CMOS (C2) through a third resistor (R3) and the other end is grounded to generate a reference voltage, and the second The fifth resistor R5 receives the output power of the CMOS C2 and outputs it to the second diode D2, and the output power of the fifth resistor R5 is input through the sixth resistor R6. The seventh resistor R7 having the other end grounded and the voltage applied to the fourth resistor R4 are input to the non-inverting terminal, and the voltage applied to the seventh resistor R7 is input to the inverting terminal. The first comparator IC1 compares the voltage and outputs an overcurrent detection control signal to the charge control circuit 140.

상기 온도 보호회로(150)는 상기 제2씨모스(C2)의 출력 전원을 구동전압과 인에이블 신호로 입력 받는 레귤레이터(190)와, 상기 레귤레이터(190)의 출력 전원을 입력 받아 상기 배터리(170)에 부착된 더미스터(TH)로 출력하는 제9저항(R9)과, 상기 레귤레이터(190)의 출력 전원을 제10저항(R10)을 통하여 입력 받고 타단이 접지된 제11저항(R11)과, 상기 제11저항(R11)에 걸리는 전압을 반전 단자에 입력 받고 상기 배터리(170)에 부착된 더미스터(TH)에 걸리는 전압을 비반전 단자에 입력받아, 그 입력받은 두 전압을 비교하여 상기 충전제어회로(140)로 과열검출 제어신호를 출력하는 제2비교기(IC2)로 구성된다.The temperature protection circuit 150 receives a regulator 190 which receives the output power of the second CMOS C2 as a driving voltage and an enable signal, and receives the output power of the regulator 190 and the battery 170. And a ninth resistor R9 outputting to the dummyster TH attached to the second resistor, an output power of the regulator 190 through the tenth resistor R10, and an eleventh resistor R11 having the other end grounded. The voltage applied to the eleventh resistor R11 is input to the inverting terminal, the voltage applied to the dummyster TH attached to the battery 170 is input to the non-inverting terminal, and the two input voltages are compared. The second comparator IC2 outputs an overheat detection control signal to the charge control circuit 140.

상기 충전제어회로(140)는 상기 제2다이오드(D2)의 출력 전원을 입력 받아 휴대폰을 구동시키기 위한 전원을 출력하고 배터리(170)를 충전하기 위한 전원을 상기 제3씨모스(C3)로 출력하는 휴대폰 구동단자(180)와, 상기 휴대폰 구동단자(180)의 출력 전원을 입력 받는 제12저항(R12)과, 상기 과전류 보호회로(130) 및 온도 보호회로(150)에서 각각 출력되는 과전류검출 및 과열검출 제어신호와 상기 제12저항(R12)의 출력전원을 제어신호로 입력받아 도통 제어되고 상기 제2다이오드(D2)의 출력 전원을 제8저항(R8)을 통하여 콜렉터에 입력 받으며 에미터가 접지된 제2트랜지스터(TR2)로 구성된 것으로, 이와같이 구성된 본 발명의 동작을 설명한다.The charging control circuit 140 receives the output power of the second diode (D2) and outputs power for driving the mobile phone and outputs power for charging the battery 170 to the third CMOS (C3) The mobile terminal driving terminal 180, the twelfth resistor R12 for receiving the output power of the mobile terminal driving terminal 180, and the overcurrent detection output from the overcurrent protection circuit 130 and the temperature protection circuit 150, respectively And an overheat detection control signal and an output power of the twelfth resistor R12 as a control signal, and are electrically controlled. The output power of the second diode D2 is input to the collector through an eighth resistor R8. Is composed of a second transistor TR2 grounded, and the operation of the present invention configured as described above will be described.

먼저, 과전압/역전압 보호회로(120)는 아답타(10)에서 출력되는 전원의 역전압을 방지하기 위해 구비된 제1다이오드(D1)를 통하여 입력 받아 제1씨모스(C1)를 통하여 제2씨모스(C2)로 전원을 공급하게 된다. 만약, 제1다이오드(D1)를 통하여 과전압이 입력되면 제너다이오드(ZD1)가 도통되어 제1저항(R1)에 전압이 걸리게 되고, 상기 제1저항(R1)에 걸린 전압에 의해 제1트랜지스터(TR1)는 도통된다. 상기 제1트랜지스터(TR1)가 도통되어 제2저항(R2)에 전압이 걸리게 되고 상기 제1씨모스(C1)의 게이트에 하이 신호가 입력되어 제1씨모스(C1)는 턴 오프되어 제2씨모스(C2)로 공급되는 전원을 차단시킨다. 따라서, 배터리(170)에 공급되는 전원이 차단된다.First, the overvoltage / reverse voltage protection circuit 120 receives an input through the first diode D1 provided to prevent the reverse voltage of the power output from the adapter 10 and receives the second voltage through the first CMOS C1. The power is supplied to the CMOS (C2). If an overvoltage is input through the first diode D1, the zener diode ZD1 is turned on, and a voltage is applied to the first resistor R1, and the first transistor R1 is applied by the voltage applied to the first resistor R1. TR1) is conductive. The first transistor TR1 is turned on to apply a voltage to the second resistor R2, and a high signal is input to the gate of the first CMOS C1 so that the first CMOS C1 is turned off to the second transistor. Shut off the power supplied to the CMOS (C2). Therefore, the power supplied to the battery 170 is cut off.

과전류 보호회로(130)는 상기 제2씨모스(C2)의 출력 전원을 제5저항(R5)을 통하여 입력 받아 제2다이오드(D2)로 출력시킨다. 제3저항(R3)과 제4저항(R4)에 의해 분배된 전압은 기준전압이고, 상기 기준전압 보다 높게 제6저항(R6)과 제7저항(R7)에 의해 분배된 전압을 비교전압으로 설정하면 제1비교기(IC1)에서 하이 신호가 출력된다. 만약, 상기 제5저항(R5)에 과전류가 흐르게 되면 상기 제5저항(R5)의 양단에 걸리는 전압 차이가 커지게 되고 제6저항(R6)과 제7저항(R7)에 의해 분배된 비교전압은 낮아지게 된다. 상기 비교전압이 제3저항(R3)과 제4저항(R4)에 의한 기준전압보다 낮아지게 되면 제1비교기(IC1)의 출력은 과전류검출 제어신호인 로우 신호를 출력시키게 된다. 상기 제1비교기(IC1)의 로우 신호를 입력 받은 제2트랜지스터(TR2)는 턴 오프되고, 그에 따라 제3씨모스(C3)는 턴 오프되어 배터리(170)로 공급되는 전원이 차단된다.The overcurrent protection circuit 130 receives the output power of the second CMOS C2 through the fifth resistor R5 and outputs it to the second diode D2. The voltage divided by the third resistor R3 and the fourth resistor R4 is a reference voltage, and the voltage divided by the sixth resistor R6 and the seventh resistor R7 is higher than the reference voltage as the comparison voltage. When set, the high signal is output from the first comparator IC1. If an overcurrent flows through the fifth resistor R5, a voltage difference across both ends of the fifth resistor R5 increases, and the comparison voltage divided by the sixth resistor R6 and the seventh resistor R7 is increased. Will be lowered. When the comparison voltage becomes lower than the reference voltages of the third resistor R3 and the fourth resistor R4, the output of the first comparator IC1 outputs a low signal that is an overcurrent detection control signal. The second transistor TR2 receiving the low signal of the first comparator IC1 is turned off, and accordingly, the third CMOS C3 is turned off to cut off power supplied to the battery 170.

온도 보호회로(150)는 레귤레이터(190)의 전압을 제10저항(R10)과 제11저항(R11)으로 분압하여 기준전압으로 하고 제9저항(R9)과 더미스터(TH)에 의해 분배된 전압을 비교전압으로 한다. 정상 상태에서 비교전압은 기준전압보다 높게 설정된다. 제2비교기(IC2)는 상기 기준전압과 비교전압을 입력 받아 하이 신호를 출력하여 상기 제2트랜지스터(TR2)에 하이 신호를 출력하게 된다. 상기 배터리(170)에 부착된 더미스터(TH)는 배터리(170)의 온도가 상승하면 그 더미스터(TH)의 저항값이 감소하여 양단에 걸리는 전압은 낮아진다. 상기 더미스터(TH)의 전압이 낮아지면 비교전압이 기준전압보다 낮아지게 되고 제2비교기(IC2)는 과열검출 제어신호인 로우 신호를 출력하게 된다. 상기 제2비교기(IC2)의 로우 신호를 입력 받은 제2트랜지스터(TR2)는 턴 오프되고, 그에 따라 제3씨모스(C3)는 턴 오프되어 배터리(170)로 공급되는 전원이 차단된다.The temperature protection circuit 150 divides the voltage of the regulator 190 into the tenth resistor R10 and the eleventh resistor R11 to be a reference voltage, and is divided by the ninth resistor R9 and the dummyster TH. Let voltage be comparative voltage. In steady state, the comparison voltage is set higher than the reference voltage. The second comparator IC2 receives the reference voltage and the comparison voltage, outputs a high signal, and outputs a high signal to the second transistor TR2. When the temperature of the battery 170 increases, the dummyster TH attached to the battery 170 decreases the resistance value of the dummyster TH, and thus the voltage across both ends becomes low. When the voltage of the dummyster TH decreases, the comparison voltage becomes lower than the reference voltage, and the second comparator IC2 outputs a low signal that is an overheat detection control signal. The second transistor TR2 receiving the low signal of the second comparator IC2 is turned off, and accordingly, the third CMOS C3 is turned off to cut off power supplied to the battery 170.

또한, 정전압/정전류 감시회로(160)는 상기 제2다이오드(D2)에서 출력되는 전압과 전류가 일정하게 유지되지 않으면 상기 제2씨모스(C2)로 하이 신호를 출력하여 제2씨모스(C2)를 턴 오프시켜 아답타(10)의 전원공급을 차단시킨다.In addition, the constant voltage / constant current monitoring circuit 160 outputs a high signal to the second CMOS C2 when the voltage and current output from the second diode D2 are not kept constant, thereby providing a second CMOS C2. ) To turn off the power supply of the adapter (10).

이상에서 상세히 설명한 바와 같이 본 발명은 과전류, 과전압, 과열상태 등으로 부터 배터리를 보호하기 위한 회로를 각각 분리 시켜 하드웨어적으로 구성했기 때문에 각 과전류, 과전압 및 과열검출 배터리 보호회로가 모두 고장나는 경우는 발생되지 않아, 종래의 휴대폰 배터리 보호회로 보다 신속하고, 안정적으로 배터리를 보호 할 수 있는 효과가 있다.As described in detail above, since the present invention is configured in hardware by separately separating circuits for protecting the battery from overcurrent, overvoltage, overheating, etc., each of the overcurrent, overvoltage, and overheating detection battery protection circuits fails. There is no effect, it is faster than the conventional mobile phone battery protection circuit, there is an effect that can protect the battery stably.

Claims (5)

배터리의 온도를 감지하기 위한 더미스터와, 아답타에서 입력 되는 과전압/역전압으로 부터 배터리를 보호하기 위한 과전압/역전압 보호회로와, 상기 과전압/역전압 보호회로를 통해 입력 받은 전원을 도통 제어하는 제2씨모스와, 상기 제2씨모스에서 입력되는 전원을 다음단으로 출력함과 아울러 그 전원이 과전류인가를 검출하여 과전류검출 제어신호를 출력하는 과전류 보호회로와, 상기 과전류 보호회로의 출력 전원을 입력 받고 배터리의 전류가 누설되는 것을 방지하는 제2다이오드와, 상기 제2씨모스의 출력 전원을 입력 받아 구동되고 상기 더미스터의 출력 신호를 입력 받아 상기 배터리가 과열되면 과열검출 제어신호를 출력하는 온도 보호회로와, 상기 제2다이오드의 출력 전원을 입력 받아 휴대폰을 구동시키고, 상기 과전류 보호회로의 과전류검출 제어신호와 온도 보호회로의 과열검출 제어신호를 입력 받아 상기 배터리의 충전을 위한 충전제어신호를 출력하는 충전제어회로와, 상기 충전제어회로의 충전제어신호에 의해 도통제어를 받아 상기 제2다이오드를 통한 전원을 상기 배터리에 충전하는 제3씨모스와, 상기 제3씨모스로 입력되는 전원을 감시하여 정전압/정전류가 아니면 상기 제2씨모스를 턴 오프시키는 제어신호를 출력하는 정전압/정전류 감시회로로 구성된 것을 특징으로 하는 휴대폰의 배터리 보호회로.A dummyster for sensing the temperature of the battery, an overvoltage / reverse voltage protection circuit for protecting the battery from the overvoltage / reverse voltage input from the adapter, and conducting control of the power input through the overvoltage / reverse voltage protection circuit. An overcurrent protection circuit for outputting a second CMOS, a power input from the second CMOS to the next stage, and detecting whether the power supply is an overcurrent and outputting an overcurrent detection control signal; an output power supply of the overcurrent protection circuit And a second diode to prevent leakage of the current of the battery and the output power of the second CMOS, and are driven and the output signal of the dummyster is input to output the overheat detection control signal when the battery is overheated. A temperature protection circuit, and an input power supply of the second diode to drive a mobile phone. A charging control circuit for receiving a current detection control signal and an overheat detection control signal of a temperature protection circuit and outputting a charging control signal for charging the battery; and receiving a conduction control by the charging control signal of the charging control circuit. A constant voltage / constant current outputting a third CMOS for charging the battery through a diode and a power signal input to the third CMOS, and outputting a control signal for turning off the second CMOS when not being a constant voltage / constant current. Battery protection circuit of a mobile phone, characterized in that consisting of a monitoring circuit. 제1항에 있어서, 과전압/역전압 보호회로는 아답타의 전원을 순방향 입력 받아 출력하는 제1다이오드와, 상기 제1다이오드에 역방향 바이어스 연결된 제너다이오드와, 상기 제너다이오드의 타단에 연결된 접지된 제1저항과, 상기 제1저항에 걸리는 전압을 제어신호로 입력 받아 도통되는 제1트랜지스터와, 상기 제1트랜지스터의 에미터에 연결되고 타단이 접지된 제2저항과, 상기 제2저항에 걸리는 전압을 제어신호로 입력 받아 도통되어 상기 제1다이오드의 출력 전원을 상기 제2씨모스로 출력하는 제1씨모스로 구성된 것을 특징으로 하는 휴대폰의 배터리 보호회로.The overvoltage / reverse voltage protection circuit of claim 1, wherein the overvoltage / reverse voltage protection circuit includes a first diode configured to receive an adapter power forward and output, a zener diode reversely biased to the first diode, and a grounded first connected to the other end of the zener diode. A first transistor connected to receive a resistor and a voltage applied to the first resistor as a control signal, a second resistor connected to an emitter of the first transistor and grounded at the other end thereof, and a voltage applied to the second resistor. A battery protection circuit of a mobile phone, comprising: a first CMOS inputted as a control signal and conducting the output signal of the first diode to the second CMOS; 제1항에 있어서, 과전류 보호회로는 제2씨모스의 출력 전원을 제3저항을 통하여 입력 받고 타단이 접지되어 기준전압을 생성하는 제4저항과, 상기 제2씨모스의 출력 전원을 입력 받아 상기 제2다이오드로 출력하는 제5저항과, 상기 제5저항의 출력 전원을 제6저항을 통하여 입력 받고 타단이 접지된 제7저항과, 상기 제4저항에 걸리는 전압을 비반전단자로 입력 받고 상기 제7저항에 걸리는 전압을 반전단자로 입력 받아, 그 입력받은 두 전압을 비교하여 상기 충전제어회로로 과전류검출 제어신호를 출력하는 제1비교기로 구성된 것을 특징으로 하는 휴대폰의 배터리 보호회로.2. The overcurrent protection circuit of claim 1, wherein the overcurrent protection circuit receives a fourth resistor for inputting the output power of the second CMOS through a third resistor and the other end is grounded to generate a reference voltage, and the output power of the second CMOS. Receiving a fifth resistor outputting the second diode, an output power of the fifth resistor through a sixth resistor, a seventh resistor having the other end grounded, and a voltage applied to the fourth resistor as a non-inverting terminal; And a first comparator for receiving a voltage applied to the seventh resistor as an inverting terminal and comparing the two input voltages to output an overcurrent detection control signal to the charge control circuit. 제1항에 있어서, 온도 보호회로는 상기 제2씨모스의 출력 전원을 구동전압과 인에이블 신호로 입력 받는 레귤레이터와, 상기 레귤레이터의 출력 전원을 입력 받아 상기 더미스터로 출력하는 제9저항과, 상기 레귤레이터의 출력 전원을 제10저항을 통하여 입력 받고 타단이 접지된 제11저항과, 상기 제11저항에 걸리는 전압을 반전 단자에 입력 받고 상기 더미스터에 걸리는 전압을 비반전 단자에 입력 받아, 그 입력받은 두 전압을 비교하여 상기 충전제어회로로 과열검출 제어신호를 출력하는 제2비교기로 구성된 것을 특징으로 하는 휴대폰의 배터리 보호회로.The temperature protection circuit of claim 1, wherein the temperature protection circuit includes: a regulator configured to receive the output power of the second CMOS as a driving voltage and an enable signal, a ninth resistor configured to receive the output power of the regulator and output the received power to the dummyster; The output power of the regulator is input through a tenth resistor, an eleventh resistor having the other end grounded, a voltage applied to the eleventh resistor is input to an inverting terminal, and a voltage applied to the dummyster is input to a non-inverting terminal. And a second comparator configured to compare two input voltages and output an overheat detection control signal to the charge control circuit. 제1항에 있어서, 충전제어회로는 상기 제2다이오드의 출력 전원을 입력 받아 휴대폰을 구동시키기 위한 전원을 출력하고 배터리를 충전하기 위한 전원을 상기 제3씨모스로 출력하는 휴대폰 구동단자와, 상기 휴대폰 구동단자의 출력 전원을 입력 받는 제12저항과, 상기 과전류 보호회로와 온도 보호회로에서 각각 출력되는 제어신호와 상기 제12저항의 출력전원을 베이스에 제어신호로 입력받아 도통 제어되고 상기 제2다이오드의 출력 전원을 제8저항을 통하여 콜렉터에 입력 받으며 에미터가 접지된 제2트랜지스터로 구성된 것을 특징으로 하는 휴대폰의 배터리 보호회로.The mobile phone driving terminal of claim 1, wherein the charge control circuit is configured to output power for driving the mobile phone by receiving the output power of the second diode, and output power for charging the battery to the third CMOS device; The second resistor receives the output power of the mobile phone driving terminal, the control signal output from the overcurrent protection circuit and the temperature protection circuit, respectively, and the output power of the twelfth resistor as a control signal, and is electrically controlled. A battery protection circuit of a mobile phone, characterized in that the output of the diode is input to the collector through an eighth resistor and the emitter is grounded.
KR1020010043435A 2001-07-19 2001-07-19 Battery protection circuit of mobile phone KR100608709B1 (en)

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KR100972991B1 (en) * 2009-12-10 2010-07-30 주식회사 이젠 Ryu and died to have highlighted the ohtakbangjijangchi
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KR100988895B1 (en) * 2003-07-16 2010-10-20 주식회사 팬택앤큐리텔 Mobile communication terminal with overvoltage application warning
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