CN2678230Y - Charger for battery of mobile phone - Google Patents
Charger for battery of mobile phone Download PDFInfo
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- CN2678230Y CN2678230Y CN 03206802 CN03206802U CN2678230Y CN 2678230 Y CN2678230 Y CN 2678230Y CN 03206802 CN03206802 CN 03206802 CN 03206802 U CN03206802 U CN 03206802U CN 2678230 Y CN2678230 Y CN 2678230Y
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Abstract
The utility model discloses a battery charger for mobile phones, comprising a voltage converting circuit composed of a bridge rectifier, a pi type wave filter, a switch module and an isolation transformer, and a pulse wave board regulator composed of an interchange box module, an starting module, a current limitation module, an error amplifier module, an overheat stop module, a regulated voltage module and an oscillator module. One input end of the pulse wave board regulator is connected with a main winding of a transformer, and the other end is connected with a rectification circuit of an auxiliary winding of the transformer. A third input is connected with a back feed loop through a photoelectric coupler. After the structure is adopted, the pulse wave board regulator of the utility model continuously regulates the output voltage according to the detection signal of the back feed loop in the working process, which means that the entire working process of the transformer is in a closed cycle control state. Not only the accurate stability of the output voltage of the charger is ensured, but also the energy can be economized.
Description
Technical field
The utility model relates to a kind of charger, particularly a kind of battery charger for mobile phone.
Background technology
Along with more prevalentization of mobile phone and globalization, people are having higher requirement aspect volume, charge efficiency, the power consumption to battery charger for mobile phone.But because the defective in some designs of the existence of present battery charger for mobile phone, can not well satisfy the efficient height simultaneously, volume is little, power is high and possesses power and imitate just design objectives such as (PFC), the tangible especially charger electric energy that charger consumes when underloading or zero load is still very big.If can be by improving the charger for mobile phone effect, reducing charger at underloading or zero load time institute's consuming electric power, save the 1.2W power calculation with every mobile phone, if the whole nation has 200,000,000 mobile phone mains chargers approximately, must consume 5W power during every charger charging, suppose every start charging every day 4 hours again, then the whole nation every day must power consumption 400 ten thousand degree.If these 200,000,000 mobile phones all improve its effect with mains charger, just can save the energy resource consumption of 100 ten thousand degree every day for country, be equivalent to 1.2 hours gross generation of 800,000 kilowatts of power plant (Ge Zhou Ba generating set energy output is 800,000 kilowatts) running approximately, its environmental protection and energy saving benefit is as seen general.
The utility model content
The utility model purpose is to provide a kind of output voltage accurate more, stable, and charger enters the battery charger for mobile phone of battery saving mode automatically when underloading or zero load.
The utility model is achieved in that a kind of battery charger for mobile phone, form voltage conversion circuit by bridge rectifier, pi type filter, alteration switch assembly, isolating transformer, AC-input voltage is a high-voltage dc voltage behind bridge rectifier and pi type filter, direct voltage is cut into square-wave signal by switch module, after isolating transformer, pi type filter conversion, obtain output voltage again, a feedback loop detecting output voltage signal is arranged, feed back to voltage conversion circuit; A pulse wave width modulation device is arranged, comprise exchange alteration switch module, start module, electric current limiting module, error amplifier module, overheated shutdown module, Voltage stabilizing module and oscillator module; Pulse wave width modulation device one input links to each other with the transformer main winding, is alteration switch, startup return circuit module input; Another input connects the auxiliary winding rectification circuit of described transformer, is the common input end of Voltage stabilizing module and oscillator module; The 3rd input is connected with feedback loop by a photoelectrical coupler, is connected with oscillator module and error amplifier; Described alteration switch module links to each other with electric current limiting module and startup return circuit module respectively, and overheated shutdown module links to each other with Voltage stabilizing module and error amplifier, and error amplifier links to each other with startup return circuit module and electric current limiting module respectively.
Described alteration switch module comprises a field effect transistor, and it has drain electrode, source electrode and grid, and described drain electrode is connected with pulse wave width modulation device one input, promptly links to each other with described transformer main winding, startup return circuit module; Source electrode is connected with the electric current limiting module; Grid passes through to be connected with the startup return circuit module behind two divider resistances.
Described startup module comprises a diode, connects with two resistance and a voltage stabilizing didoe successively; Drain electrode is connected described diode anode with alteration switch module field effect transistor, described two resistance links link to each other with oscillator module, described resistance and voltage stabilizing didoe cathode connection terminal, be connected described divider resistance and voltage stabilizing didoe plus earth with error amplifier module, two divider resistance branches of alteration switch module fet gate pressure side respectively.
Described electric current limiting module comprises electric capacity and two resistance that are connected successively, be connected with the error amplification module by online between electric capacity and first resistance, the link of two resistance links to each other with the source electrode of alteration switch module field effect transistor, the link ground connection of the electric capacity and second resistance.
Described error amplifier module comprises a NPN transistor, emitter ground connection, and base stage is connected with the electric current limiting module, and collector electrode is connected with the startup module via resistance and shunt capacitance; Also have a PNP transistor, collector electrode is connected with collector electrode with the base stage of described NPN transistor respectively with base stage, and emitter connects with the startup module and is connected.
Described overheated shutdown module comprises a NPN transistor, emitter ground connection, and collector electrode is connected with the error amplifier module, and base stage is via resistance and shunt capacitance ground connection; A diode is arranged, and negative electrode is connected with described transistor base, and anode by a thermistor ground connection, is connected with Voltage stabilizing module with a resistance respectively.
Described Voltage stabilizing module comprises a NPN transistor, and described emitter is connected with overheated shutdown module, and another input of collector electrode and pulse bandwidth promptly is connected with the auxiliary winding rectification circuit of described transformer; Have a resistance to be connected between described transistor collector and the base stage, described base stage is connected the voltage stabilizing didoe plus earth with a voltage stabilizing didoe negative electrode.
Described oscillator module contains an electric capacity, and another input of described electric capacity one end and pulse bandwidth promptly is connected with the auxiliary winding rectification circuit of described transformer, and the other end is via two series resistance ground connection; Between described electric capacity and first resistance by an electric capacity with start module and be connected second resistance parallel connection one bypass electric capacity.
After adopting said structure, the utility model constantly detects the current/voltage situation of output at the use feedback loop, and send signal to the pulse wave width modulation device and adjust output voltage, the conducting of control alteration switch module or the concussion frequency of closing are to obtain stable output voltage and to decide Current Feedback Control, if when underloading, can reduce turn-on frequency, reduce the exchange damage of high frequency alteration switch, and reach the pattern of energy saving standby.Be that the entire work process of transformer is in and closes the loop control state, guaranteed accuracy, the stability of charger output voltage, underloading or Light Condition, the pulse wave width modulation device is adjusted the charger power output, saves electric energy.
Description of drawings
Fig. 1 is the utility model theory diagram;
Fig. 2 is that the utility model pulse wave width modulation device is adjusted circuit theory diagrams;
Fig. 3 is the utility model feedback loop circuitry schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
As shown in Figure 1; battery charger for mobile phone; comprise bridge rectifier 1, pi type filter 2, pulse wave width modulation device 3, isolating transformer 4; pi type filter 5 and output voltage protection loop 7; AC-input voltage is a high-voltage dc voltage behind bridge rectifier 1 and pi type filter 2; described direct voltage is cut into square-wave signal by the alteration switch module 31 in the pulse wave width modulation device 3; after isolating transformer 4, pi type filter 5 conversions, obtain output voltage again, give battery of mobile phone 8 chargings.Input a, the b of voltage feedback loop 6 is connected to detecting resistance R 22 two ends between isolating transformer 4, the pi type filter 5, and the voltage output end of input c charger connects; The voltage of its output d is connected with pulse wave width modulation device 3 by optical coupler 10.Described pulse wave width modulation device 3 comprises exchange alteration switch module 31, starts module 32, electric current limiting module 33, error amplifier 34, overheated shutdown module 35, Voltage stabilizing module 36 and oscillator module 37.The first terminals e of pulse wave width modulation device 3 is connected to the I/O end of auxiliary winding rectification circuit of transformer and optical coupler, is its commutating voltage input, and it is the common input end of Voltage stabilizing module 36 and oscillator module 37; Its second terminals f is connected with the transformer main winding, is drain electrode of alteration switch module 31 inner grid pipes and startup return circuit module input; Its 3rd terminals g is the Voltage Feedback input of pulse wave width modulation device 3, is connected with optical coupler 10 jointly with oscillator module 37 and error amplifier 34.Alteration switch module 31 links to each other with electric current limiting module 33 and startup return circuit module 32 respectively in the pulse wave width modulation device 3; overheated shutdown module 35 links to each other with Voltage stabilizing module 36 and error amplifier 34, and error amplifier module 34 links to each other with startup module 32 and electric current limiting module 33 respectively.
AC-input voltage is the direct voltage of a high pressure via bridge rectifier 1 and π type filtering 2 directly, in the direct again feed-in pulse wave width modulation device 3 of this voltage, alteration switch module 31 operates in the high frequency state of several KHz to hundreds of KHz, the direct voltage that is to say high pressure can be cut into high-frequency square-wave signal, voltage quasi position via the 42 acquisition expections of isolating transformer 4 secondary sides is filtered into required VD through pi type filter 5 again; Simultaneously, feedback loop detecting output voltage signal, and signal fed back to the pulse wave width modulation device through photoelectrical coupler 10, via error amplification module 34 signals control the conducting of alteration switch module 31 or the concussion frequency of closing to obtain stable output voltage and to decide Current Feedback Control; If unusual condition takes place, as overload, short circuit or feed back unusually etc., this controller can see through overheated shutdown module 35 of inner setting and 33 actions of electric current limiting module, reach stoppage protection and security regulations; If this controller can reduce turn-on frequency when underloading, reduces the exchange damage of high frequency alteration switch, and reaches the pattern of energy saving standby.
As shown in Figure 2, described alteration switch module comprises field effect transistor Q2; The error amplifier module comprises NPN transistor Q3 and PNP transistor Q5, resistance R 6 and capacitor C 4; Heat is shut down module and is comprised NPN transistor Q4, diode D4, capacitor C 6, resistance R 13, R9 and thermistor R12; Voltage stabilizing module comprises transistor Q1, voltage stabilizing didoe ZD1 and resistance R 1; Start module and comprise resistance R 2, R4, voltage stabilizing didoe ZD2 and diode D1; Oscillator module comprises resistance R 8, R11, capacitor C 3, C5, C1; The electric current limiting module comprises resistance R 10, R14, capacitor C 7; Resistance R 14 and R10 are connected to the source electrode of alteration switch module field effect transistor Q2.
Its drain electrode of described alteration switch module field effect transistor Q2 is connected to the second terminals f of pulse wave width modulation device, and starts the anode of return circuit module diode D1; Source electrode is connected to electric current limiting module resistance R 14 and R10; Grid is crimped to startup return circuit module resistance R 4 and voltage-stabiliser tube ZD2 by crossing resistance R 5 and R7 branch.
Described startup module comprises resistance R 2, R4, voltage stabilizing didoe ZD2 and diode D1; The anode of diode D1 and alteration switch module field effect transistor Q2, its drain electrode is connected to the first terminals e of pulse wave width modulation device; The negative electrode of diode D1 is connected the capacitor C 3 of receiving oscillator module again by resistance R 2 with resistance R 4; Resistance R 4 is connected with the negative electrode of voltage-stabiliser tube ZD2, is connected with capacitor C 4 common ground with resistance R 6 with the emitter of the transistor Q3 of resistance R 5 and R7 dividing point and error amplifier module again; The anode of voltage-stabiliser tube ZD2 is connected back ground connection with resistance R 7.
Described electric current limiting module resistance R 14 and R10 are connected to the source electrode of alteration switch module field effect transistor Q2; Ground connection after resistance R 14 is connected with capacitor C 7; Resistance R 10 and capacitor C 7 are connected to the 3rd terminals g of pulse wave width modulation device jointly.
The emitter of described error amplifier module transistor Q3 and resistance R 6 and capacitor C 4 are connected with R7 with voltage-stabiliser tube ZD2 and resistance R 5 with startup return circuit module resistance R 4 jointly; The base stage of Q3 is connected with capacitor C 4 with Q5 collector electrode and resistance R 6, is connected to the collector electrode of overheated shutdown module transistor Q4 again; The collector electrode of Q3 and the base stage of Q5 are connected to electric current limiting module resistance R 10 and capacitor C 7 and oscillator module resistance R 11, are connected to the 3rd terminals g of pulse wave width modulation device simultaneously; The grounded emitter of Q5.
The emitter of described overheated shutdown module transistor Q4 and resistance R 13 and thermistor R12 and capacitor C 6 ground connection; The base stage of transistor Q4 is connected with diode D4 negative electrode with capacitor C 6 with resistance R 13; Diode D4 anode is connected with thermistor R12 with resistance R 9; Resistance R 9 is connected to the emitter of Voltage stabilizing module Q1.
The collector electrode of described Voltage stabilizing module transistor Q1 and resistance R 1 are connected to the second terminals f with oscillator module capacitor C 1; The base stage of transistor Q1 is connected with the negative electrode of resistance R 1 with voltage-stabiliser tube ZD1; The emitter of transistor Q1 is connected with overheated shutdown module resistance R 9; The anode ground connection of voltage-stabiliser tube ZD1.
Described oscillator module, the commutating voltage input of the second terminals f is connected with resistance R 8, capacitor C 3 by capacitor C 1; Capacitor C 3 comprises that with the startup module resistance R 2 is connected with R4; Resistance R 8 is connected with capacitor C 5 with R11; The resistance R 10 of the collector electrode of resistance R 11 and error amplifier module Q3 and the base stage of Q5 and electric current limiting module and capacitor C 7 are connected to the 3rd terminals g of pulse wave width modulation device jointly; Capacitor C 5 one end ground connection.
During normal the use, start the loop with alteration switch Q2 conducting, transformer 4 primary side main windings 41 places produce voltage, and make the auxiliary winding of positive feedback produce voltage by turn ratio, and through concussion loop charging generation concussion frequency, via resistance R 4, R5 makes alteration switch Q2 keep continuing opening, electric current when main winding 41 places that flow through arrives saturation condition, electric current limiting module 33 and error amplifier module 34 detect the slope source current of Q2 and decide ON time in the concussion cycle, produce voltage when ascending current flows through R14, make Q5 conducting ground connection, related Q3 conducting, and making alteration switch Q2 close, the electric current vertical motion stops; When ascending current stopped, energy was transferred to secondary side 42 by transformer primary side 41, again via Fig. 1 outlet side rectifier diode 11 rectifying and wave-filtering with pi type filter 5, and obtained direct voltage and provided to the output battery-end.
If when meeting overload or unusual condition; loop of voltage regulation produces source of stable pressure; offer overheated shutdown loop and do the detecting action; when thermistor R12 uprises because of temperature rising resistance; and make Q4 conducting ground connection; and see through error amplifier and make the Q3 conducting, make alteration switch Q2 close, and reach the protection security purpose.
As shown in Figure 3, feedback loop comprises R19, R21, R18, C11, R15, U2, R17, R16, R20, C10, Q6, forms a fixed voltage feedback loop and a fixed current loop.
In Fig. 3 feedback loop, the fixed voltage loop is that the output voltage bleeder circuit is made up of R19, R21, make voltage ratio via shunt regulator U2 and RC phase compensation R18, C11, when the transformer output voltage is too high, the negative electrode K voltage meeting step-down of U2, make the optical coupler conducting and control signal is fed back to the pulse wave width modulation device, control alteration switch, regulate to reach burning voltage.
The fixed current loop utilizes output current detecting resistance R 22, when making the VBE of transistor Q6 reach the conducting amount, utilizes optical coupler that control signal is fed back to the pulse wave width modulation device, and the control alteration switch is to reach balanced output current.
Claims (8)
1, a kind of battery charger for mobile phone, by bridge rectifier, pi type filter, switch module, isolating transformer is formed voltage conversion circuit, AC-input voltage is a high-voltage dc voltage behind bridge rectifier and pi type filter, direct voltage is cut into square-wave signal by switch module, again through isolating transformer, pi type filter conversion back obtains output voltage, a feedback loop detecting output voltage signal is arranged, feed back to voltage conversion circuit, it is characterized in that: a pulse wave width modulation device (3) is arranged, comprise alteration switch module (31), start module (32), electric current limiting module (3 3), error amplifier module (34), overheated shutdown module (35), Voltage stabilizing module (36) and oscillator module (37); Pulse wave width modulation device (3) one inputs (f) link to each other with transformer main winding (41), are alteration switch module (31), startup return circuit module (32) input; Another input (e) connects the auxiliary winding rectification circuit of described transformer, is the common input end of Voltage stabilizing module (36) and oscillator module (37); The 3rd input (e) is connected with feedback loop (6) by a photoelectrical coupler (10), is oscillator module (37) and error amplifier module (34) input; Described alteration switch module (31) links to each other with electric current limiting module (33) and startup return circuit module (32) respectively; overheated shutdown module (35) links to each other with Voltage stabilizing module (36) and error amplifier module (34), and error amplifier module (34) links to each other with startup return circuit module (32) and electric current limiting module (33) respectively.
2, battery charger for mobile phone according to claim 1, it is characterized in that: described alteration switch module comprises a field effect transistor (Q2), it has drain electrode, source electrode and grid, described drain electrode is connected with pulse wave width modulation device one input (e), promptly links to each other with described transformer main winding (41), startup return circuit module (32); Source electrode is connected with electric current limiting module (3 3); Grid is connected with startup return circuit module (32) by two divider resistances (R5, R7) back.
3, battery charger for mobile phone according to claim 1 is characterized in that: described startup module comprises a diode (D2), connects with two resistance (R2, R4) and a voltage stabilizing didoe (ZD2) successively; Described diode (D1) anode is connected with the alteration switch module, described two resistance (R2, R4) link links to each other with oscillator module (37), described resistance (R4) and voltage stabilizing didoe (ZD2) cathode connection terminal, be connected described divider resistance (R7) and voltage stabilizing didoe (ZD2) anode link ground connection respectively with error amplifier module (34), alteration switch module (31).
4, battery charger for mobile phone according to claim 1, it is characterized in that: described electric current limiting module comprises electric capacity (C7) and two resistance that are connected successively, line is connected with error amplification module (34) between electric capacity (C7) and first resistance (R10), the link of two resistance (R10, R14) links to each other with alteration switch module (31), the link ground connection of described electric capacity (C7) and second resistance (R14).
5, battery charger for mobile phone according to claim 1, it is characterized in that: described error amplifier module comprises a NPN transistor (Q5), emitter ground connection, base stage is connected with the electric current limiting module, and collector electrode is connected with startup module (32) via resistance (R5) and shunt capacitance (C6) in parallel; Also have a PNP transistor (Q3), collector electrode is connected with collector electrode with the base stage of described NPN transistor respectively with base stage, and emitter connects with startup module (32) and is connected.
6, battery charger for mobile phone according to claim 1 is characterized in that; Described overheated shutdown module comprises a NPN transistor (Q4), emitter ground connection, and collector electrode is connected with error amplifier module (34), and base stage is via resistance (R13) and shunt capacitance (C6) ground connection; A diode (D4) is arranged, and negative electrode is connected with described transistor (Q4) base stage, and anode by a thermistor (R12) ground connection, is connected with Voltage stabilizing module (36) with a resistance (R9) respectively.
7, battery charger for mobile phone according to claim 1, it is characterized in that: described Voltage stabilizing module (36) comprises a NPN transistor (Q1), described transistor (Q1) emitter is connected with overheated shutdown module, another input of collector electrode and pulse bandwidth promptly is connected with auxiliary winding (42) rectification circuit of described transformer (4); Have a resistance (R1) to be connected between described transistor collector and the base stage, described base stage is connected the voltage stabilizing didoe plus earth with a voltage stabilizing didoe (ZD1) negative electrode.
8, battery charger for mobile phone according to claim 1, it is characterized in that: described oscillator module contains an electric capacity (C1), one input (f) of described electric capacity one end and pulse bandwidth, promptly be connected with auxiliary winding (42) rectification circuit of described transformer (4), the other end is via two series resistances (R8, R11) ground connection; Between described electric capacity (C1) and first resistance (R2) by an electric capacity (C3) with start module (32) and be connected, second resistance (R11) bypass electric capacity (C5) in parallel then is connected with an input (g) of pulse bandwidth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03206802 CN2678230Y (en) | 2003-08-01 | 2003-08-01 | Charger for battery of mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03206802 CN2678230Y (en) | 2003-08-01 | 2003-08-01 | Charger for battery of mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2678230Y true CN2678230Y (en) | 2005-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03206802 Expired - Fee Related CN2678230Y (en) | 2003-08-01 | 2003-08-01 | Charger for battery of mobile phone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2678230Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441690A (en) * | 2013-08-18 | 2013-12-11 | 浙江大学 | Method for controlling combined converter for achieving tight adjusting output with high-frequency alternating-current side connected in series |
| CN104882953A (en) * | 2015-05-29 | 2015-09-02 | 苏州工业职业技术学院 | Mobile phone charging control circuit |
-
2003
- 2003-08-01 CN CN 03206802 patent/CN2678230Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441690A (en) * | 2013-08-18 | 2013-12-11 | 浙江大学 | Method for controlling combined converter for achieving tight adjusting output with high-frequency alternating-current side connected in series |
| CN103441690B (en) * | 2013-08-18 | 2015-05-20 | 浙江大学 | Method for controlling combined converter for achieving tight adjusting output with high-frequency alternating-current side connected in series |
| CN104882953A (en) * | 2015-05-29 | 2015-09-02 | 苏州工业职业技术学院 | Mobile phone charging control circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |