CN106451706A - Lcd display charger circuit - Google Patents

Lcd display charger circuit Download PDF

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Publication number
CN106451706A
CN106451706A CN201611187897.9A CN201611187897A CN106451706A CN 106451706 A CN106451706 A CN 106451706A CN 201611187897 A CN201611187897 A CN 201611187897A CN 106451706 A CN106451706 A CN 106451706A
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CN
China
Prior art keywords
resistance
electric capacity
pin
circuit
chip
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201611187897.9A
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Chinese (zh)
Inventor
吴潮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangxi Beston Electronics Technology Co Ltd
Original Assignee
Jiangxi Beston Electronics Technology Co Ltd
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Application filed by Jiangxi Beston Electronics Technology Co Ltd filed Critical Jiangxi Beston Electronics Technology Co Ltd
Priority to CN201611187897.9A priority Critical patent/CN106451706A/en
Publication of CN106451706A publication Critical patent/CN106451706A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302Overcharge protection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304Overcurrent protection

Abstract

The invention discloses an LCD display charger circuit. The LCD display charger circuit comprises a primary rectifying circuit, a rectifying and filter circuit and a master control circuit which are sequentially connected, wherein the master control circuit is connected with the input end of a transformer, the output end of the transformer is connected to the secondary rectifying and filter circuit, the secondary rectifying and filter circuit is connected with an LCD display control circuit, and a clamping circuit is arranged in the master control circuit and used for absorbing the reverse interference of the transformer. The LCD display charger circuit has the advantages that a SP5613 chip in the LCD display control circuit integrates an quasi-resonance primary-side controller with ultralow standby power consumption, a 650V high-avalanche-ability intelligent-power MOSFET and an OTP over-temperature protector, performance is increased, and the circuit is simplified; the SP5613 chip is in a primary-side feedback working mode, an optocoupler and TL431 are omitted, and the quasi-resonance and multi-mode technologies are used to increase efficiency and eliminate audio noise; the SP5613 chip has an extremely comprehensive intelligent protection function; a CSU8RP3426 chip in the LCD display control circuit is a high-performance programmable single-chip microcomputer, the battery charging state can be monitored by using the IC, and multiple protecting functions are added.

Description

LCD shows charger circuit
Technical field
The present invention relates to charging circuit field, and in particular to LCD shows charger circuit.
Background technology
Mains charger is a kind of housed device that commonly uses in people's daily life, a lot of families such as mobile phone, computer, electric motor car Electrical appliance can be all used to charger;The pattern of existing charger and had nothing in common with each other using object, but adopt existing charger more Discrete component, the use of a large amount of discrete components cause high processing costs, complex process to cause the repair rate of product higher, in addition electricity Line structure is complex, and circuit reliability is not high, and circuit linearity, load regulation are poor, also compares power consumption, and existing battery Charger cannot show charged state mostly, and circuit is fairly simple, unprotected circuit, increased loss and the resource of battery Waste.
Content of the invention
It is an object of the invention to provide the high and low-power consumption of a kind of low production cost, circuit reliability and charging shape can be shown State, the LCD for having protection circuit shows charger circuit.
The present invention is achieved through the following technical solutions:LCD shows charger circuit, including the primary rectifier electricity being sequentially connected Road and current rectifying and wave filtering circuit and main control circuit, the main control circuit is connected to the input of transformator, the transformator Outfan be connected to secondary commutation filter circuit, the secondary commutation filter circuit connects LCD display control circuit;Described LCD display control circuit includes the 3rd chip, IC power circuit, LED lamp circuit, battery charge control circuit, cell voltage inspection Slowdown monitoring circuit, LED display, electrification reset circuit, thermal-shutdown circuit and battery discharging circuit;The secondary commutation filter circuit Connect IC power circuit, LED lamp circuit and battery charge control circuit respectively;The battery charge control circuit is also respectively connected with To battery discharging circuit and the 3rd chip;The battery discharging circuit is respectively connecting to battery voltage detection circuit and the 3rd core Piece, the 3rd chip is also respectively connected with LED display, thermal-shutdown circuit, battery discharge on-off circuit, electrification reset circuit And battery voltage detection circuit;The IC power circuit includes the second chip, the 12nd electric capacity, the 11st electric capacity, described second The VI foot of chip is connected with secondary commutation filter circuit, and the VO foot of second chip is grounded one end of 12 electric capacity, and described the One end of 12 electric capacity is also connected with one end of the 11st electric capacity, and one end of the 11st electric capacity is also connected with+5V power supply, and described The GND foot of two chips, the other end of the 12nd electric capacity and the other end of the 11st electric capacity all connect output ground;The LED lamp circuit Including the 9th diode, light emitting diode, the 30th resistance, the 31st resistance and the first battery, the VI of second chip Foot is respectively connecting to one end of the 30th resistance and the positive pole of the 9th diode, and the other end connection of the 30th resistance is luminous The positive pole of diode, the negative pole of the 9th diode connects one end of the 31st resistance, the negative pole of the light emitting diode The other end of the 31st resistance is connected to, the other end of the 31st resistance is also connected with the positive pole of the first battery, described The negative pole of the first battery connects output ground;The battery charge control circuit includes the N ditch of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor composition The double metal-oxide-semiconductors in road, the 5th pin of the double metal-oxide-semiconductors of the N-channel, the 6th pin, the 7th pin and the 8th pin are all connected with each other simultaneously And secondary commutation filter circuit is connected to, the second pin of the double metal-oxide-semiconductors of the N-channel connects the tenth pin of the 3rd chip, institute The 4th pin for stating the double metal-oxide-semiconductor of N-channel connects the 9th pin of the 3rd chip, the first pin of the double metal-oxide-semiconductors of the N-channel and the Two pins are connected to battery discharging circuit and battery voltage detection circuit, and the battery voltage detection circuit includes the 24th electricity Resistance, the 29th resistance, the second battery, the 3rd battery, the 18th resistance, the 19th resistance, the 15th electric capacity, the 16th electric capacity With the 17th electric capacity, the positive pole of the N-channel double metal-oxide-semiconductors the first pin the second battery of connection, the negative pole of second battery connects Output ground, the positive pole of second battery is also connected with one end of the 24th resistance, and the other end of the 24th resistance is even Connect one end of the 16th electric capacity, one end of the 16th electric capacity is also connected with the 17th pin of the 3rd chip, the described 16th Another termination output ground of electric capacity;3rd pin of the double metal-oxide-semiconductors of the N-channel connects the positive pole of the 3rd battery, the 3rd electricity The negative pole in pond connects output ground, and the positive pole of the 3rd battery is also connected with one end of the 29th resistance, the 29th resistance The other end connect one end of the 17th electric capacity, one end of the 17th electric capacity is also connected with the 18th pin of the 3rd chip, Another termination output ground of the 17th electric capacity 7;The negative pole of the 3rd chip is also associated with one end of the 18th resistance, institute The one end for stating the 18th resistance is also connected with one end of the 19th resistance, the 19th electricity of other end connection of the 18th resistance The other end of resistance, the other end of the 18th resistance is also connected with one end of the 15th electric capacity, one end of the 15th electric capacity It is also connected with the 14th pin of the 3rd chip, another termination output ground of the 15th electric capacity;The battery discharging circuit bag Include the 20th resistance, the 21st resistance, the 22nd resistance, the 23rd resistance, the 25th resistance, the 26th electricity Resistance, the 27th resistance, the 28th resistance, the 4th audion and the 5th audion;In the battery voltage detection circuit One end of 24 resistance connects one end of the 22nd resistance, the 29th resistance in the battery voltage detection circuit One end connects one end of the 27th resistance, and one end of the 22nd resistance is also connected with one end of the 21st resistance, institute The one end for stating the 21st resistance is also connected with one end of the 20th resistance, another termination+5V power supply of the 20th resistance, institute The other end of the other end and the 21st resistance of stating the 22nd resistance is connected with each other and is connected to the current collection of the 4th audion Pole, the emitter stage of the 4th audion connects output ground, and the base stage of the 4th audion connects one end of the 23rd resistance, The other end for connecing the 23rd resistance is connected to the 11st pin of the 3rd chip, and one end of the 27th resistance is also Connect one end of the 26th resistance, one end of the 26th resistance is also connected with one end of the 25th resistance, described Another termination+5V power supply of 25 resistance, the other end of the 27th resistance and the other end phase of the 26th resistance Connect and be connected to the colelctor electrode of the 5th audion, the emitter stage of the 5th audion connects output ground, the five or three pole The base stage of pipe connects one end of the 28th resistance, and the other end of the 28th resistance connects the 12nd of the 3rd chip and draws Foot;20th pin of the 3rd chip is connected with one end of the 14th electric capacity, and another termination of the 14th electric capacity is defeated Go out ground, one end of the 14th electric capacity is additionally coupled to+5V power supply;8th pin of the 3rd chip is connected with the 13rd electricity One end of resistance, the other end of the 13rd resistance is connected to the LED- pin of LED display, and the 7th of the 3rd chip draws Foot is connected to the CS pin of LED display, and the 6th pin of the 3rd chip is connected to the WR pin of LED display, described 5th pin of the 3rd chip is connected to the DATA pin of LED display, and the GND pin of the LED display meets output ground, institute The VDD pin for stating LED display connects+5V power supply;The battery discharge on-off circuit includes the 12nd resistance and switch, described One end of 19th pin the 12nd resistance of connection of three chips, one end of the other end connecting valve of the 12nd resistance, Another termination output ground of the switch;The electrification reset circuit includes the 17th resistance and the 13rd electric capacity, the described 3rd 4th pin of chip connects one end of the 13rd electric capacity, another termination output of the 13rd electric capacity, the described 13rd One end of electric capacity is also connected with one end of the 17th resistance, another termination+5V power supply of the 17th resistance;The overheat protector Circuit includes the 14th resistance, the 15th resistance, the first audion, the 16th resistance and temperature detection resistance, the 3rd core 13rd pin of piece connects the colelctor electrode of the first audion, and the colelctor electrode of first audion is also connected with the 14th resistance One end, the other end of the 14th resistance connects one end of the 15th resistance, a termination+5V electricity of the 15th resistance Source, the other end of the 15th resistance connects one end of the 16th resistance, the other end connection first of the 16th resistance The base stage of audion, one end of the 16th resistance is also connected with one end of temperature detection resistance, the sending out of first audion The other end of emitter-base bandgap grading and temperature detection resistance all connects output ground;The secondary commutation filter circuit include the 7th diode, the 8th Diode, the 7th electric capacity, the 8th electric capacity, the 11st resistance and the tenth electric capacity, the 7th pin connection of the transformator outfan The positive pole of the 8th diode, the negative pole of the 8th diode connects one end of the tenth electric capacity, the other end of the tenth electric capacity Output ground is connect, one end of the tenth electric capacity is also connected with the VI foot of the second chip;5th pin of the transformator outfan connects Output ground, the 6th pin of the transformator outfan connects the positive pole of the 7th diode, and the negative pole of the 7th diode is even Connect one end of the 7th electric capacity, one end of the 7th electric capacity is also connected with one end of the 11st resistance, the one of the 11st resistance End is also connected with one end of the 8th electric capacity, the other end of the 7th electric capacity, the other end of the 11st resistance and the 8th electric capacity another One end all connects output ground;One end of 8th electric capacity be additionally coupled to the 5th pin of the double metal-oxide-semiconductor of interconnective N-channel, the Six pins, the 7th pin and the 8th pin;The main control circuit includes the first chip, auxiliary current rectifying and wave filtering circuit, sampling compensation Circuit, clamp circuit and the frequency control circuit that opens the light;The auxiliary current rectifying and wave filtering circuit includes the 7th resistance, the second diode and Three electric capacity, the first pin of first chip connects one end of the 3rd electric capacity, another termination power of the 3rd electric capacity, One end of 3rd electric capacity is also connected with one end of the 7th resistance, and the other end of the 7th resistance connects the negative of the second diode Pole, the positive pole of second diode is connected to the 3rd pin of the input of transformator, and the sampling compensation circuit includes Eight resistance, the 9th resistance and the 6th electric capacity, the 3rd pin of first chip connects one end of the 6th electric capacity, the 6th electricity One end of appearance is also connected with one end of the 9th resistance, and the other end of the 6th electric capacity and the 9th resistance all connects power supply ground, and described the One end of nine resistance is also connected with one end of the 8th resistance, and the other end of the 8th resistance is also connected with the of the input of transformator Three pins;The clamp circuit includes the 5th resistance, the 5th electric capacity and the first diode, the 5th pin of first chip and 6th pin is connected with each other and is connected to the second pin of input of transformator and the positive pole of the first diode, and described first The negative pole of diode is also connected with one end of the 5th electric capacity, and one end of the 5th electric capacity is also connected with one end of the 5th resistance, described The other end connection of the other end of the 5th electric capacity and the 5th resistance, the other end of the 5th electric capacity is additionally coupled to the defeated of transformator Enter first pin at end, the other end of the 5th resistance is additionally coupled to current rectifying and wave filtering circuit;The frequency control circuit that opens the light Including second resistance, 3rd resistor and the 4th electric capacity, the first pin of first chip is also connected with one end of second resistance, institute State second resistance the other end be connected to transformator input the first pin, the second pin connection the of first chip One end of four electric capacity, another termination power ground of the 4th electric capacity, the 4th pin connection 3rd resistor of first chip One end, another termination power ground of the 3rd resistor, the 7th pin of first chip and the 8th pin all connect power supply Ground;The current rectifying and wave filtering circuit includes the first inductance, first resistor, the first electric capacity and the second electric capacity, the 5th resistance another One end is connected to one end of the first inductance, and one end of first inductance is also connected with one end of first resistor, the first resistor One end be also associated with one end of the second electric capacity, the other end of the first resistor connects one end of the first electric capacity, described first The other end of electric capacity and the second electric capacity all connects power supply ground, and the other end of the first resistor is also connected with the other end of the first inductance, The other end of first inductance is connected to primary rectifier circuit;The primary rectifier circuit includes that live wire input, zero line are defeated Enter end, safe electric capacity, electric fuse, bridge rectifier block, the first AC resistance and the second AC resistance, the live wire input passes through Electric fuse is connected to one end of the first AC resistance, and the other end of first AC resistance connects the one of the second AC resistance End, the zero line input is connected to the other end of the second AC resistance;One end of first AC resistance is additionally coupled to peace One end of plenary capacitance, the other end of second AC resistance is additionally coupled to the other end of safe electric capacity, the safe electric capacity One end is also connected with the 3rd pin of bridge rectifier block, and the other end of the safe electric capacity is also connected with the second of bridge rectifier block and draws Foot, the 3rd pin of the bridge rectifier block connects power supply ground, and the first pin of the bridge rectifier block connects the another of the first inductance One end;Model SP5613 of first chip;Model CSU8RP3426 of the 3rd chip, second chip Model 78L05;The transformator is TRANS5.
The present invention includes the primary rectifier circuit being sequentially connected and current rectifying and wave filtering circuit and main control circuit, the master control Circuit processed is connected to the input of transformator, and the outfan of the transformator is connected to secondary commutation filter circuit, the secondary Current rectifying and wave filtering circuit connects LCD display control circuit, is provided with clamp circuit for absorbing transformator in the main control circuit Reverse interference is so as to prevent from being interfered in power supply transformation, and wherein LCD display control circuit kind is using model SP5613 First chip and the 3rd chip of model CSU8RP3426, SP5613 integrated chip super-low standby power consumption quasi-resonance primary-side-control Device and the high avalanche capacity intelligent power MOSFET of 650V and and OTP overtemperature protector, improve performance and simplify circuit;SP5613 core Piece is also primary side feedback mode of operation, to eliminate optocoupler and TL431, improves efficiency using quasi-resonance and Multi mode technique and eliminates Audio-frequency noise, makes system meet 6 grades of Energy Efficiency Standards;SP5613 chip has extremely comprehensive intelligent protection function, comprising by week Phase overcurrent protection, overvoltage protection, open loop protection, overheat protector, output short circuit protection and CS open/short circuit protection;CSU8RP3426 Chip is the single-chip microcomputer of high performance programmable, not only the charged state of battery is monitored using this IC, also add many Plant defencive function:Battery overheat protector, voltage overcharge the function of automatically shutting down when protection and cell voltage saturation.
The invention has benefit that:1)Circuit reduction practicality, simple structure, reliability is improved;2)Improve circuit line Property and load regulation, reducing energy consumption;3)Increasing protection circuit is used for protecting, and prevents the loss of battery and the waste of resource;4) The state that battery charges can be shown;5)Automatically disconnect when the voltage that power charging circuit is present overcharges too high with battery temperature.
Description of the drawings
Fig. 1 is the circuit theory diagrams of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings with specific embodiment, the invention will be further described.
See that Fig. 1, LCD show charger circuit, including the primary rectifier circuit that is sequentially connected and current rectifying and wave filtering circuit and Main control circuit, the main control circuit is connected to the input of transformator T1, and the outfan of the transformator T1 is connected to time Level current rectifying and wave filtering circuit, the secondary commutation filter circuit connects LCD display control circuit;The LCD display control circuit bag Include the 3rd chip U3, IC power circuit, LED lamp circuit, battery charge control circuit, battery voltage detection circuit, LED display K1, electrification reset circuit, thermal-shutdown circuit and battery discharging circuit;The secondary commutation filter circuit connects IC power supply respectively Circuit, LED lamp circuit and battery charge control circuit;The battery charge control circuit is further connected to battery discharging circuit With the 3rd chip U3;The battery discharging circuit is respectively connecting to battery voltage detection circuit and the 3rd chip U3, and the described 3rd Chip U3 is also respectively connected with LED display K1, thermal-shutdown circuit, battery discharge on-off circuit, electrification reset circuit and battery Voltage detecting circuit;The IC power circuit includes the second chip U2, the 12nd electric capacity C12, the 11st electric capacity C11, described The VI foot of two chip U2 is connected with secondary commutation filter circuit, and the VO foot of the second chip U2 is grounded the one of 12 electric capacity C12 End, one end of the 12nd electric capacity C12 is also connected with one end of the 11st electric capacity C11, and one end of the 11st electric capacity C11 is also Connection+5V power supply, the GND foot of the second chip U2, the other end of the 12nd electric capacity C12 and the 11st electric capacity C11 another End all connects output ground;The LED lamp circuit include the 9th diode D9, LED 1, the 30th resistance R30, the 3rd The VI foot of 11 resistance R31 and the first battery BT1, the second chip U2 be respectively connecting to the 30th resistance R30 one end and The positive pole of the 9th diode D9, the positive pole of the other end connecting luminous diode LED1 of the 30th resistance R30, the described 9th The negative pole of diode D9 connects one end of the 31st resistance R31, and the negative pole of the LED 1 is connected to the 30th The other end of one resistance R31, the other end of the 31st resistance R31 is also connected with the positive pole of the first battery BT1, and described first The negative pole of battery BT1 connects output ground;The battery charge control circuit includes the first metal-oxide-semiconductor Q2A and the second metal-oxide-semiconductor Q2B composition The double metal-oxide-semiconductor Q2 of N-channel, the 5th pin of the double metal-oxide-semiconductor Q2 of the N-channel, the 6th pin, the 7th pin and the 8th pin all phases Connect and be connected to secondary commutation filter circuit, the second pin of the double metal-oxide-semiconductor Q2 of the N-channel connects the 3rd chip U3's Tenth pin, the 4th pin of the double metal-oxide-semiconductor Q2 of the N-channel connects the 9th pin of the 3rd chip U3, the double MOS of the N-channel First pin of pipe Q2 and second pin are connected to battery discharging circuit and battery voltage detection circuit, the battery voltage detection Circuit include the 24th resistance R24, the 29th resistance R29, the second battery B2, the 3rd battery B3, the 18th resistance R18, 19th resistance R19, the 15th electric capacity C15, the 16th electric capacity C16 and the 17th electric capacity C17, the double metal-oxide-semiconductor Q2 of the N-channel the One pin connects the positive pole of the second battery B2, and the negative pole of the second battery B2 connects output ground, the positive pole of the second battery B2 One end of the 24th resistance R24 is also connected with, the other end of the 24th resistance R24 connects the one of the 16th electric capacity C16 End, one end of the 16th electric capacity C16 is also connected with the 17th pin of the 3rd chip U3, and the 16th electric capacity C16's is another One termination output ground;3rd pin of the double metal-oxide-semiconductor Q2 of the N-channel connects the positive pole of the 3rd battery B3, the 3rd battery B3 Negative pole connect output ground, the positive pole of the 3rd battery B3 is also connected with one end of the 29th resistance R29, the 29th electricity The other end of resistance R29 connects one end of the 17th electric capacity C17, and one end of the 17th electric capacity C17 is also connected with the 3rd chip U3 The 18th pin, the 17th electric capacity C17 another termination output ground;The negative pole of the 3rd chip U3 is also associated with One end of 18 resistance R18, one end of the 18th resistance R18 is also connected with one end of the 19th resistance R19, and the described tenth The other end of eight resistance R18 connects the other end of the 19th resistance R19, and the other end of the 18th resistance R18 is also connected with the One end of 15 electric capacity C15, one end of the 15th electric capacity C15 is also connected with the 14th pin of the 3rd chip U3, and described Another termination output ground of 15 electric capacity C15;The battery discharging circuit includes the 20th resistance R20, the 21st resistance R21, the 22nd resistance R22, the 23rd resistance R23, the 25th resistance R25, the 26th resistance R26, the 27th Resistance R27, the 28th resistance R28, the 4th audion Q4 and the 5th audion Q5;Second in the battery voltage detection circuit One end of 14 resistance R24 connects one end of the 22nd resistance R22, the 29th resistance in the battery voltage detection circuit One end of R29 connects one end of the 27th resistance R27, and one end of the 22nd resistance R22 is also connected with the 21st One end of resistance R21, one end of the 21st resistance R21 is also connected with one end of the 20th resistance R20, the 20th electricity Another termination+5V power supply of resistance R20, the other end of the 22nd resistance R22 and the other end phase of the 21st resistance R21 Connect and be connected to the colelctor electrode of the 4th audion Q4, the emitter stage of the 4th audion Q4 connects and ground is exported, the described 4th The base stage of audion Q4 connects one end of the 23rd resistance R23, and the other end for meeting the 23rd resistance R23 is connected to the 11st pin of three chip U3, one end of the 27th resistance R27 is also connected with one end of the 26th resistance R26, institute The one end for stating the 26th resistance R26 is also connected with one end of the 25th resistance R25, and the 25th resistance R25's is another Termination+5V power supply, the other end of the 27th resistance R27 and the other end of the 26th resistance R26 are connected with each other and connect The colelctor electrode of the 5th audion Q5 is connected to, the emitter stage of the 5th audion Q5 connects output ground, the 5th audion Q5's Base stage connects one end of the 28th resistance R28, and the other end of the 28th resistance R28 connects the tenth of the 3rd chip U3 the Two pins;20th pin of the 3rd chip U3 is connected with one end of the 14th electric capacity C14, the 14th electric capacity C14 Another termination output ground, one end of the 14th electric capacity C14 is additionally coupled to+5V power supply;The 8th of the 3rd chip U3 Pin is connected with one end of the 13rd resistance R13, and the other end of the 13rd resistance R13 is connected to LED display K1's LED- pin, the 7th pin of the 3rd chip U3 is connected to the CS pin of LED display K1, and the of the 3rd chip U3 Six pins are connected to the WR pin of LED display K1, and the 5th pin of the 3rd chip U3 is connected to LED display K1's DATA pin, the GND pin of the LED display K1 connects output ground, and the VDD pin of the LED display K1 connects+5V power supply; The battery discharge on-off circuit includes the 19th pin connection of the 12nd resistance R12 and switch S1, the 3rd chip U3 One end of 12nd resistance R12, one end of the other end connecting valve S1 of the 12nd resistance R12, the switch S1's is another One termination output ground;The electrification reset circuit includes the 17th resistance R17 and the 13rd electric capacity C13, the 3rd chip U3 The 4th pin connect the 13rd electric capacity C13 one end, the 13rd electric capacity C13 another termination output ground, the described tenth One end of three electric capacity C13 is also connected with one end of the 17th resistance R17, another termination+5V power supply of the 17th resistance R17; The thermal-shutdown circuit include the 14th resistance R14, the 15th resistance R15, the first audion Q1, the 16th resistance R16 and Temperature detection resistance TR1, the colelctor electrode of the 13rd pin first audion Q1 of connection of the 3rd chip U3, the described 1st The colelctor electrode of pole pipe Q1 is also connected with one end of the 14th resistance R14, the 15th electricity of other end connection of the 14th resistance R14 One end of resistance R15, a termination+5V power supply of the 15th resistance R15, the other end connection the of the 15th resistance R15 One end of 16 resistance R16, the base stage of the other end first audion Q1 of connection of the 16th resistance R16, the described 16th One end of resistance R16 is also connected with one end of temperature detection resistance TR1, the emitter stage of the first audion Q1 and temperature detection electricity The other end of resistance TR1 all connects output ground;The secondary commutation filter circuit include the 7th diode D7, the 8th diode D8, Seven electric capacity C7, the 8th electric capacity C8, the 11st resistance R11 and the tenth electric capacity C10, the 7th pin of the transformator T1 outfan is even The positive pole of the 8th diode D8 is connect, the negative pole of the 8th diode D8 connects one end of the tenth electric capacity C10, the tenth electric capacity Another termination output ground of C10, one end of the tenth electric capacity C10 is also connected with the VI foot of the second chip U2;The transformator T1 5th pin of outfan connects output ground, and the 6th pin of the transformator T1 outfan connects the positive pole of the 7th diode D7, The negative pole of the 7th diode D7 connects one end of the 7th electric capacity C7, and one end of the 7th electric capacity C7 is also connected with the 11st electricity One end of resistance R11, one end of the 11st resistance R11 is also connected with one end of the 8th electric capacity C8, and the 7th electric capacity C7's is another The other end of one end, the other end of the 11st resistance R11 and the 8th electric capacity C8 all connects output ground;One end of the 8th electric capacity C8 It is additionally coupled to the 5th pin, the 6th pin, the 7th pin and the 8th pin of the double metal-oxide-semiconductor Q2 of interconnective N-channel;The master Control circuit includes the first chip U1, auxiliary current rectifying and wave filtering circuit, sampling compensation circuit, clamp circuit and the FREQUENCY CONTROL electricity that opens the light Road;The auxiliary current rectifying and wave filtering circuit includes the 7th resistance R7, the second diode D2 and the 3rd electric capacity C3, the first chip U1's First pin connects one end of the 3rd electric capacity C3, another termination power of the 3rd electric capacity C3, the 3rd electric capacity C3's One end is also connected with one end of the 7th resistance R7, and the other end of the 7th resistance R7 connects the negative pole of the second diode D2, described The positive pole of the second diode D2 is connected to the 3rd pin of the input of transformator T1, and the sampling compensation circuit includes the 8th electricity Resistance R8, the 9th resistance R9 and the 6th electric capacity C6, the 3rd pin of the first chip U1 connects one end of the 6th electric capacity C6, described One end of 6th electric capacity C6 is also connected with one end of the 9th resistance R9, and the other end of the 6th electric capacity C6 and the 9th resistance R9 all connects Power supply ground, one end of the 9th resistance R9 is also connected with one end of the 8th resistance R8, and the other end of the 8th resistance R8 also connects Connect the 3rd pin of the input of transformator T1;The clamp circuit includes the 5th resistance R5, the 5th electric capacity C5 and the one or two pole 5th pin of pipe D1, the first chip U1 and the 6th pin be connected with each other and be connected to transformator T1 input Two pins and the positive pole of the first diode D1, the negative pole of the first diode D1 is also connected with one end of the 5th electric capacity C5, described One end of 5th electric capacity C5 is also connected with one end of the 5th resistance R5, and the other end of the 5th electric capacity C5 and the 5th resistance R5's is another One end connects, and the other end of the 5th electric capacity C5 is additionally coupled to the first pin of the input of transformator T1, the 5th electricity The other end of resistance R5 is additionally coupled to current rectifying and wave filtering circuit;The frequency control circuit that opens the light includes second resistance R2,3rd resistor First pin of R3 and the 4th electric capacity C4, the first chip U1 is also connected with one end of second resistance R2, second resistance R2 The other end be connected to transformator T1 input the first pin, the second pin of the first chip U1 connects the 4th electric capacity One end of C4, another termination power ground of the 4th electric capacity C4, the 4th pin connection 3rd resistor of the first chip U1 One end of R3, another termination power ground of 3rd resistor R3, the 7th pin of the first chip U1 and the 8th pin are all Connect power supply ground;The current rectifying and wave filtering circuit includes the first inductance L1, first resistor RL1, the first electric capacity C1 and the second electric capacity C2, institute The other end for stating the 5th resistance R5 is connected to one end of the first inductance L1, and one end of the first inductance L1 is also connected with first resistor One end of RL1, one end of first resistor RL1 is also associated with one end of the second electric capacity C2, first resistor RL1 another One end of the first electric capacity C1 of end connection, the other end of the first electric capacity C1 and the second electric capacity C2 all connects power supply ground, and described first The other end of resistance RL1 is also connected with the other end of the first inductance L1, and the other end of the first inductance L1 is connected to primary rectifier Circuit;The primary rectifier circuit includes that live wire input L, zero line input N, safe electric capacity CX1, electric fuse FR1, bridge-type are whole Stream block BD1, the first AC resistance RX1 and the second AC resistance RX2, the live wire input L is connected to the by electric fuse FR1 One end of one AC resistance RX1, the other end of the first AC resistance RX1 connects one end of the second AC resistance RX2, described Zero line input N is connected to the other end of the second AC resistance RX2;One end of the first AC resistance RX1 is additionally coupled to peace One end of plenary capacitance CX1, the other end of the second AC resistance RX2 is additionally coupled to the other end of safe electric capacity CX1, the peace One end of plenary capacitance CX1 is also connected with the 3rd pin of bridge rectifier block BD1, and the other end of the safe electric capacity CX1 is also connected with bridge The second pin of formula rectifying block BD1, the 3rd pin of the bridge rectifier block BD1 connects power supply ground, the bridge rectifier block BD1's First pin connects the other end of the first inductance L1;Model SP5613 of the first chip U1;The 3rd chip U3's Model CSU8RP3426, model 78L05 of the second chip U2;The transformator T1 is TRANS5.
In present embodiment, the primary rectifier circuit and current rectifying and wave filtering circuit and main control circuit are sequentially connected, and use In the alternating voltage for being input into the power supply input circuit is converted into DC voltage and defeated by the outfan of the high frequency transformer Go out, the clamp circuit is used for absorbing the drain-source end peak voltage inside main control IC chip U1, and can prevent reversely Interference, the outfan of the transformator is connected to secondary commutation filter circuit, and the secondary commutation filter circuit connection LCD shows Control circuit, solves existing power charging circuit and cannot show charged state, and circuit is fairly simple, unprotected circuit, Loss and the wasting of resources of battery is increased, and when the voltage for existing overcharges too high with battery temperature, it is impossible to disconnect, battery The problem that charged state cannot show.
In present embodiment, LCD shows charger circuit based on SP5613 chip and CSU8RP3426 chip, SP5613 core The integrated super-low standby power consumption quasi-resonance primary controller of piece and the high avalanche capacity intelligent power MOSFET of 650V and and OTP excess temperature Protector.Performance is high, peripheral component is simplified.SP5613 is primary side feedback mode of operation, eliminates optocoupler and TL431.Using Quasi-resonance improves efficiency with Multi mode technique and eliminates audio-frequency noise so that system meets 6 grades of Energy Efficiency Standards.SP5613 chip has There is extremely comprehensive intelligent protection function, short comprising Cycle by Cycle overcurrent protection, overvoltage protection, open loop protection, overheat protector, output Road protection and CS open/short circuit protection.CSU8RP3426 chip is the single-chip microcomputer of high performance programmable, using this IC not only to battery Charged state monitored, also add multi-protective function:Battery overheat protector, voltage overcharge protection and battery The function of automatically shutting down during voltage saturation.
Protection scope of the present invention includes but is not limited to embodiment of above, and protection scope of the present invention is with claims It is defined, any replacement is readily apparent that by those skilled in the art that this technology is made, deformation, improvement each fall within the present invention's Protection domain.

Claims (8)

1.LCD shows charger circuit, it is characterised in that:Including the primary rectifier circuit that is sequentially connected and current rectifying and wave filtering circuit with And main control circuit, the main control circuit is connected to transformator(T1)Input, the transformator(T1)Outfan even Secondary commutation filter circuit is connected to, the secondary commutation filter circuit connects LCD display control circuit;The LCD display control Circuit includes the 3rd chip(U3), IC power circuit, LED lamp circuit, battery charge control circuit, battery voltage detection circuit, LED display(K1), electrification reset circuit, thermal-shutdown circuit and battery discharging circuit;The secondary commutation filter circuit divides Lian Jie not IC power circuit, LED lamp circuit and battery charge control circuit;The battery charge control circuit is further connected to Battery discharging circuit and the 3rd chip(U3);The battery discharging circuit is respectively connecting to battery voltage detection circuit and the 3rd core Piece(U3), the 3rd chip(U3)It is also respectively connected with LED display(K1), thermal-shutdown circuit, battery discharge on-off circuit, Electrification reset circuit and battery voltage detection circuit;The IC power circuit includes the second chip(U2), the 12nd electric capacity (C12), the 11st electric capacity(C11), second chip(U2)VI foot be connected with secondary commutation filter circuit, second core Piece(U2)VO foot be grounded 12 electric capacity(C12)One end, the 12nd electric capacity(C12)One end be also connected with the 11st electric capacity (C11)One end, the 11st electric capacity(C11)One end be also connected with+5V power supply, second chip(U2)GND foot, 12 electric capacity(C12)The other end and the 11st electric capacity(C11)The other end all connect output ground;The LED lamp circuit includes Nine diodes(D9), light emitting diode(LED1), the 30th resistance(R30), the 31st resistance(R31)With the first battery (BT1), second chip(U2)VI foot be respectively connecting to the 30th resistance(R30)One end and the 9th diode(D9)'s Positive pole, the 30th resistance(R30)Other end connecting luminous diode(LED1)Positive pole, the 9th diode(D9) Negative pole connect the 31st resistance(R31)One end, the light emitting diode(LED1)Negative pole be connected to the 31st electricity Resistance(R31)The other end, the 31st resistance(R31)The other end be also connected with the first battery(BT1)Positive pole, described One battery(BT1)Negative pole connect output ground;The battery charge control circuit includes the first metal-oxide-semiconductor(Q2A)With the second metal-oxide-semiconductor (Q2B)The double metal-oxide-semiconductors of the N-channel of composition(Q2), the double metal-oxide-semiconductors of the N-channel(Q2)The 5th pin, the 6th pin, the 7th pin All it is connected with each other with the 8th pin and secondary commutation filter circuit is connected to, the double metal-oxide-semiconductors of the N-channel(Q2)Second pin Connect the 3rd chip(U3)The tenth pin, the double metal-oxide-semiconductor of the N-channel(Q2)The 4th pin connect the 3rd chip(U3)? Nine pins, the double metal-oxide-semiconductors of the N-channel(Q2)The first pin and second pin be connected to battery discharging circuit and cell voltage inspection Slowdown monitoring circuit, the battery voltage detection circuit includes the 24th resistance(R24), the 29th resistance(R29), the second battery (B2), the 3rd battery(B3), the 18th resistance(R18), the 19th resistance(R19), the 15th electric capacity(C15), the 16th electric capacity (C16)With the 17th electric capacity(C17), the double metal-oxide-semiconductors of the N-channel(Q2)First pin connects the second battery(B2)Positive pole, institute State the second battery(B2)Negative pole connect output ground, second battery(B2)Positive pole be also connected with the 24th resistance(R24)'s One end, the 24th resistance(R24)The other end connect the 16th electric capacity(C16)One end, the 16th electric capacity (C16)One end be also connected with the 3rd chip(U3)The 17th pin, the 16th electric capacity(C16)Another termination output Ground;The double metal-oxide-semiconductors of the N-channel(Q2)The 3rd pin connect the 3rd battery(B3)Positive pole, the 3rd battery(B3)Negative Pole connects output ground, the 3rd battery(B3)Positive pole be also connected with the 29th resistance(R29)One end, described 29th electricity Resistance(R29)The other end connect the 17th electric capacity(C17)One end, the 17th electric capacity(C17)One end be also connected with the 3rd Chip(U3)The 18th pin, the 17th electric capacity(C17)Another termination output ground;3rd chip(U3)Negative Pole is also associated with the 18th resistance(R18)One end, the 18th resistance(R18)One end be also connected with the 19th resistance (R19)One end, the 18th resistance(R18)The other end connect the 19th resistance(R19)The other end, the described tenth Eight resistance(R18)The other end be also connected with the 15th electric capacity(C15)One end, the 15th electric capacity(C15)One end also connect Connect the 3rd chip(U3)The 14th pin, the 15th electric capacity(C15)Another termination output ground;The battery discharge electricity Road includes the 20th resistance(R20), the 21st resistance(R21), the 22nd resistance(R22), the 23rd resistance(R23)、 25th resistance(R25), the 26th resistance(R26), the 27th resistance(R27), the 28th resistance(R28), the 4th Audion(Q4)With the 5th audion(Q5);24th resistance in the battery voltage detection circuit(R24)One end connection 22nd resistance(R22)One end, the 29th resistance in the battery voltage detection circuit(R29)One end connection the 27 resistance(R27)One end, the 22nd resistance(R22)One end be also connected with the 21st resistance(R21)One End, the 21st resistance(R21)One end be also connected with the 20th resistance(R20)One end, the 20th resistance(R20) Another termination+5V power supply, the 22nd resistance(R22)The other end and the 21st resistance(R21)Other end phase Connect and be connected to the 4th audion(Q4)Colelctor electrode, the 4th audion(Q4)Emitter stage connect output ground, described 4th audion(Q4)Base stage connect the 23rd resistance(R23)One end, described connect the 23rd resistance(R23)Another End is connected to the 3rd chip(U3)The 11st pin, the 27th resistance(R27)One end be also connected with the 26th electricity Resistance(R26)One end, the 26th resistance(R26)One end be also connected with the 25th resistance(R25)One end, described 25 resistance(R25)Another termination+5V power supply, the 27th resistance(R27)The other end and the 26th resistance (R26)The other end be connected with each other and be connected to the 5th audion(Q5)Colelctor electrode, the 5th audion(Q5)Transmitting Pole connects output ground, the 5th audion(Q5)Base stage connect the 28th resistance(R28)One end, described 28th electricity Resistance(R28)The other end connect the 3rd chip(U3)The 12nd pin;3rd chip(U3)The 20th pin connection There is the 14th electric capacity(C14)One end, the 14th electric capacity(C14)Another termination output ground, the 14th electric capacity (C14)One end be additionally coupled to+5V power supply;3rd chip(U3)The 8th pin be connected with the 13rd resistance(R13)'s One end, the 13rd resistance(R13)The other end be connected to LED display(K1)LED- pin, the 3rd chip (U3)The 7th pin be connected to LED display(K1)CS pin, the 3rd chip(U3)The 6th pin be connected to LED Display screen(K1)WR pin, the 3rd chip(U3)The 5th pin be connected to LED display(K1)DATA pin, institute State LED display(K1)GND pin connect output ground, the LED display(K1)VDD pin connect+5V power supply;The battery Discharge switching circuit includes the 12nd resistance(R12)And switch(S1), the 3rd chip(U3)The 19th pin connection the 12 resistance(R12)One end, the 12nd resistance(R12)Other end connecting valve(S1)One end, the switch (S1)Another termination output ground;The electrification reset circuit includes the 17th resistance(R17)With the 13rd electric capacity(C13), institute State the 3rd chip(U3)The 4th pin connect the 13rd electric capacity(C13)One end, the 13rd electric capacity(C13)The other end Connect output ground, the 13rd electric capacity(C13)One end be also connected with the 17th resistance(R17)One end, the 17th resistance (R17)Another termination+5V power supply;The thermal-shutdown circuit includes the 14th resistance(R14), the 15th resistance(R15), One audion(Q1), the 16th resistance(R16)And temperature detection resistance(TR1), the 3rd chip(U3)The 13rd pin Connect the first audion(Q1)Colelctor electrode, first audion(Q1)Colelctor electrode be also connected with the 14th resistance(R14)'s One end, the 14th resistance(R14)The other end connect the 15th resistance(R15)One end, the 15th resistance(R15) One termination+5V power supply, the 15th resistance(R15)The other end connect the 16th resistance(R16)One end, the described tenth Six resistance(R16)The other end connect the first audion(Q1)Base stage, the 16th resistance(R16)One end be also connected with temperature Degree detection resistance(TR1)One end, first audion(Q1)Emitter stage and temperature detection resistance(TR1)The other end all Connect output ground.
2. LCD according to claim 1 shows charger circuit, it is characterised in that:The secondary commutation filter circuit bag Include the 7th diode(D7), the 8th diode(D8), the 7th electric capacity(C7), the 8th electric capacity(C8), the 11st resistance(R11)With Ten electric capacity(C10), the transformator(T1)7th pin of outfan connects the 8th diode(D8)Positive pole, the described 8th 2 Pole pipe(D8)Negative pole connect the tenth electric capacity(C10)One end, the tenth electric capacity(C10)Another termination output ground, described Tenth electric capacity(C10)One end be also connected with the second chip(U2)VI foot;The transformator(T1)5th pin of outfan connects Output ground, the transformator(T1)6th pin of outfan connects the 7th diode(D7)Positive pole, the 7th diode (D7)Negative pole connect the 7th electric capacity(C7)One end, the 7th electric capacity(C7)One end be also connected with the 11st resistance(R11) One end, the 11st resistance(R11)One end be also connected with the 8th electric capacity(C8)One end, the 7th electric capacity(C7)Another One end, the 11st resistance(R11)The other end and the 8th electric capacity(C8)The other end all connect output ground;8th electric capacity(C8) One end be additionally coupled to the double metal-oxide-semiconductor of interconnective N-channel(Q2)The 5th pin, the 6th pin, the 7th pin and the 8th draw Foot.
3. LCD according to claim 1 shows charger circuit, it is characterised in that:The main control circuit includes first Chip(U1), auxiliary current rectifying and wave filtering circuit, sampling compensation circuit, clamp circuit and the frequency control circuit that opens the light;The auxiliary rectification filter Wave circuit includes the 7th resistance(R7), the second diode(D2)With the 3rd electric capacity(C3), first chip(U1)First draw Foot connects the 3rd electric capacity(C3)One end, the 3rd electric capacity(C3)Another termination power ground, the 3rd electric capacity(C3)'s One end is also connected with the 7th resistance(R7)One end, the 7th resistance(R7)The other end connect the second diode(D2)Negative Pole, second diode(D2)Positive pole be connected to transformator(T1)Input the 3rd pin, sampling compensation electricity Road includes the 8th resistance(R8), the 9th resistance(R9)With the 6th electric capacity(C6), first chip(U1)The 3rd pin connection 6th electric capacity(C6)One end, the 6th electric capacity(C6)One end be also connected with the 9th resistance(R9)One end, described 6th electricity Hold(C6)With the 9th resistance(R9)The other end all connect power supply ground, the 9th resistance(R9)One end be also connected with the 8th resistance (R8)One end, the 8th resistance(R8)The other end be also connected with transformator(T1)Input the 3rd pin;The pincers Position circuit includes the 5th resistance(R5), the 5th electric capacity(C5)With the first diode(D1), first chip(U1)The 5th draw Foot and the 6th pin are connected with each other and are connected to transformator(T1)The second pin of input and the first diode(D1)'s Positive pole, first diode(D1)Negative pole be also connected with the 5th electric capacity(C5)One end, the 5th electric capacity(C5)One end It is also connected with the 5th resistance(R5)One end, the 5th electric capacity(C5)The other end and the 5th resistance(R5)The other end connection, 5th electric capacity(C5)The other end be additionally coupled to transformator(T1)Input the first pin, the 5th resistance(R5) The other end be additionally coupled to current rectifying and wave filtering circuit;The frequency control circuit that opens the light includes second resistance(R2), 3rd resistor (R3)With the 4th electric capacity(C4), first chip(U1)The first pin be also connected with second resistance(R2)One end, described Two resistance(R2)The other end be connected to transformator(T1)Input the first pin, first chip(U1)Second draw Foot connects the 4th electric capacity(C4)One end, the 4th electric capacity(C4)Another termination power ground, first chip(U1)'s 4th pin connects 3rd resistor(R3)One end, the 3rd resistor(R3)Another termination power ground, first chip (U1)The 7th pin and the 8th pin all connect power supply ground.
4. LCD according to claim 3 shows charger circuit, it is characterised in that:The current rectifying and wave filtering circuit includes One inductance(L1), first resistor(RL1), the first electric capacity(C1)With the second electric capacity(C2), the 5th resistance(R5)The other end It is connected to the first inductance(L1)One end, first inductance(L1)One end be also connected with first resistor(RL1)One end, described First resistor(RL1)One end be also associated with the second electric capacity(C2)One end, the first resistor(RL1)Other end connection the One electric capacity(C1)One end, first electric capacity(C1)With the second electric capacity(C2)The other end all connect power supply ground, described first electricity Resistance(RL1)The other end be also connected with the first inductance(L1)The other end, first inductance(L1)The other end be connected to primary Rectification circuit.
5. LCD according to claim 4 shows charger circuit, it is characterised in that:The primary rectifier circuit includes fire Line input(L), zero line input(N), safe electric capacity(CX1), electric fuse(FR1), bridge rectifier block(BD1), the first exchange Resistance(RX1)With the second AC resistance(RX2), the live wire input(L)By electric fuse(FR1)It is connected to the first alternating current Resistance(RX1)One end, first AC resistance(RX1)The other end connect the second AC resistance(RX2)One end, described zero Line input(N)It is connected to the second AC resistance(RX2)The other end;First AC resistance(RX1)One end be also connected with To safe electric capacity(CX1)One end, second AC resistance(RX2)The other end be additionally coupled to safe electric capacity(CX1)Another One end, the safe electric capacity(CX1)One end be also connected with bridge rectifier block(BD1)The 3rd pin, the safe electric capacity(CX1) The other end be also connected with bridge rectifier block(BD1)Second pin, the bridge rectifier block(BD1)The 3rd pin connect power supply Ground, the bridge rectifier block(BD1)The first pin connect the first inductance(L1)The other end.
6. LCD according to claim 3 shows charger circuit, it is characterised in that:First chip(U1)Model For SP5613.
7. LCD according to claim 1 shows charger circuit, it is characterised in that:3rd chip(U3)Model For CSU8RP3426, second chip(U2)Model 78L05.
8. LCD according to claim 1 shows charger circuit, it is characterised in that:The transformator(T1)For TRANS5.
CN201611187897.9A 2016-12-21 2016-12-21 Lcd display charger circuit Pending CN106451706A (en)

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Application publication date: 20170222