CN103248224A - UC3843 based and 12 V to 20 V efficient boost circuit - Google Patents
UC3843 based and 12 V to 20 V efficient boost circuit Download PDFInfo
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Abstract
本发明公开一种基于UC3843的12V转20V高效boost电路。现有移动电源的输出电压为5V，难以满足人们对于大功率电子产品的充电需求。该电路包括温度和过放保护电路、输出电路、单片机控制电路；温度和过放保护电路的输出端与输出电路的输入端信号连接、输入端与单片机控制电路的输入端信号连接，12V电源给温度和过放保护电路、输出电路、单片机控制电路提供电源。该电路在12V输入时，采用boost电路拓扑结构，使输出可达20V；采用双并联续流二极管结构及电流检测环电路，提高了输出电路转化效率，使电路在20V输出时，转换效率在90%以上；采用温度和过放保护电路确保电路安全稳定工作。
The invention discloses a 12V to 20V high-efficiency boost circuit based on UC3843. The output voltage of the existing mobile power supply is 5V, which is difficult to meet people's charging needs for high-power electronic products. The circuit includes a temperature and over-discharge protection circuit, an output circuit, and a single-chip microcomputer control circuit; the output terminal of the temperature and over-discharge protection circuit is connected to the input terminal signal of the output circuit, and the input terminal is connected to the input terminal signal of the single-chip microcomputer control circuit. 12V power supply Temperature and over-discharge protection circuits, output circuits, and single-chip microcomputer control circuits provide power. When the circuit is input at 12V, it adopts a boost circuit topology to make the output up to 20V; it adopts a double-parallel freewheeling diode structure and a current detection loop circuit to improve the conversion efficiency of the output circuit, so that the conversion efficiency of the circuit is 90% when the circuit is output at 20V. More than %; temperature and over-discharge protection circuits are used to ensure safe and stable operation of the circuit.
Description
Technical field
The invention belongs to the portable power source technical field, be specifically related to a kind of 12V based on UC3843 and turn the efficient boost circuit of 20V.
Background technology
Along with the fast development of electron trade, the kind of portable power source is more and more, and the output voltage of most portable power sources is 5 volts (V), is difficult to meet the charging demand of people for high-power electronic product.
Summary of the invention
The objective of the invention is for the deficiencies in the prior art, provide a kind of 12V based on UC3843 to turn the efficient boost circuit of 20V.
The present invention includes temperature and over-discharge protection circuit, output circuit, single chip machine controlling circuit; The output of temperature and over-discharge protection circuit is connected with the input end signal of output circuit, input is connected with the input end signal of single chip machine controlling circuit, and the 12V power supply provides power supply to temperature and over-discharge protection circuit, output circuit, single chip machine controlling circuit.
Described temperature and over-discharge protection circuit comprise relay R elay, metal-oxide-semiconductor Q1, diode D1, resistance R 1; After being connected with the negative electrode of the 3rd pin, the first diode D1, the 1st pin of relay R elay is connected with the 12V power supply, the 2nd pin is connected with the anode of the first diode D1, the drain electrode of metal-oxide-semiconductor Q1, the 3rd pin is connected with normally-closed contact the 5th pin, the 4th pin is unsettled, and the 5th pin is as the output Vmain of temperature and over-discharge protection circuit; The grid of metal-oxide-semiconductor Q1 is connected with an end of the first resistance R 1, source ground, and the other end of the first resistance R 1 is as the signal end Control of temperature and over-discharge protection circuit;
Described output circuit comprises 20V output main circuit, 20V output control circuit;
Described 20V output main circuit comprises N-channel MOS pipe Q2, PNP triode Q3, inductance L 1, current transformer T1A, resistance R 2, diode D2～D3, capacitor C 1～C4, one end of the positive pole of the first capacitor C 1 and the second capacitor C 2, after connecting, one end of the first inductance L 1 is connected with the output Vmain of temperature and over-discharge protection circuit 1, the other end of the negative pole of the first capacitor C 1 and the second capacitor C 2, the collector electrode of PNP triode Q3, the source electrode of N-channel MOS pipe Q2, the negative pole of the 3rd capacitor C 3, ground connection after one end of the 4th capacitor C 4 connects, the end of the other end of the first inductance L 1 and the first current transformer T1A, the anodic bonding of the second diode D2, the positive pole of the negative electrode of the second diode D2 and the 3rd capacitor C 3, after connecting, exports the other end of the 4th capacitor C 4 the output 20V-OUT of main circuit as 20V, the other end of the first current transformer T1A is connected with the drain electrode of N-channel MOS pipe Q2, the emitter of the grid of N-channel MOS pipe Q2 and PNP triode Q3, the negative electrode of the 3rd diode D3 connects, the base stage of the anode of the 3rd diode D3 and PNP triode Q3, one end of the second resistance R 2 connects, the other end of the second resistance R 2 is as the input PWM of 20V output main circuit, described the first capacitor C 1, the 3rd capacitor C 3 are electrochemical capacitor,
Described 20V output control circuit comprises the first chip U1, NPN triode Q4, current transformer T1B, resistance R 3～R10, capacitor C 5～C8, diode D4, the 1st pin of the first chip U1 and an end of the 5th capacitor C 5, one end of the 5th resistance R 5 connects, the other end of the 2nd pin and the 5th capacitor C 5, the other end of the 5th resistance R 5, one end of the 3rd resistance R 3, one end of the 4th resistance R 4 connects, one end of the 3rd pin and the 8th resistance R 8, one end of the 6th capacitor C 6, one end of the tenth resistance R 10 connects, one end of the 4th pin and the 9th resistance R 9, one end of the 7th capacitor C 7, the base stage of NPN triode Q4 connects, ground connection after the 5th pin is connected with an end of the 8th capacitor C 8, the 6th pin is connected with the input PWM of 20V output main circuit, the 7th pin connects the 12V power supply, the other end of the 8th pin and the 8th capacitor C 8, the other end of the 9th resistance R 9, the collector electrode of NPN triode Q4 connects the output V1 as the 20V output control circuit, the emitter of NPN triode Q4 is connected with the other end of the tenth resistance R 10, the other end ground connection of the 7th capacitor C 7, one end of the other end of the 8th resistance R 8 and the 7th resistance R 7, the negative electrode of the 4th diode D4 connects, one end of the anode of the 4th diode D4 and the 6th resistance R 6, the end of the second current transformer T1B connects, the other end of the other end of the second current transformer T1B and the 6th resistance R 6, the other end of the 7th resistance R 7, ground connection after the other end of the 6th capacitor C 6 connects, after the output 20V-OUT of the other end of the 3rd resistance R 3 and 20V output main circuit is connected as the feedback signal interface, the other end ground connection of the 4th resistance R 4, the model of described the first chip U1 is UC3843,
Described single chip machine controlling circuit 3 comprises singlechip chip U2, operational amplifier U3, resistance R 11～R18, capacitor C 9～C11, the 1st pin of singlechip chip U2 and an end of the 11 resistance R 11, one end of the 12 resistance R 12 connects, one end of the 4th pin and the 13 resistance R 13, one end of the 9th capacitor C 9 connects, the 6th pin is connected with the signal end Control of temperature and over-discharge protection circuit 1, one end of the 7th pin and the tenth capacitor C 10, the 1st pin of the first operational amplifier U3, the 2nd pin of the first operational amplifier U3 connects, one end of the 10th pin and the 11 capacitor C 11, the 5th pin of the first operational amplifier U3, the 7th pin of the first operational amplifier U3 connects, the 14th pin ground connection, the 2nd, 3, 5, 8, 9, 11, 12, 13 pins are unsettled, the 3rd pin of the first operational amplifier U3 is connected with an end of the 14 resistance R 14, an end of the 15 resistance R 15, the 4th pin ground connection, and the 6th pin is connected with an end of the 16 resistance R 16, and the 8th pin is connected with the output V1 of 20V output control circuit, the other end of the 16 resistance R 16 is connected with an end of the 17 resistance R 17, an end of the 18 resistance R 18, the other end of the other end of the 11 resistance R 11, the other end of the 13 resistance R 13, the 15 resistance R 15, the other end of the 17 resistance R 17 all connect the 12V power supply, the other end of the other end of the 12 resistance R 12, the other end of the 14 resistance R 14, the 18 resistance R 18, the other end of the 9th capacitor C 9, the other end of the tenth capacitor C 10, the equal ground connection of the other end of the 11 capacitor C 11, the model of described singlechip chip U2 is PIC16F616T-I/SL, and the model of the first operational amplifier U3 is LM358.
The invention has the beneficial effects as follows:
Circuit of the present invention, when 12V inputs, adopts the boost circuit topological structure
,make output can reach 20V, can solve at present that portable power source can not be to the charging problem of the high-power electronic products such as notebook computer on the market
.adopt two-in-parallel fly-wheel diode structure and current detecting loop circuit, improved the output circuit transformation efficiency, make circuit when 20V exports, conversion efficiency is more than 90%.Adopt temperature and over-discharge protection circuit to guarantee the circuit safety steady operation.
The accompanying drawing explanation
Fig. 1 is system configuration schematic diagram of the present invention;
The circuit diagram that Fig. 2 is temperature and over-discharge protection circuit;
The circuit diagram that Fig. 3 is 20V output main circuit;
The circuit diagram that Fig. 4 is the 20V output control circuit;
The circuit diagram that Fig. 5 is single chip machine controlling circuit.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further analyzed.
As shown in Figure 1, the present invention includes temperature and over-discharge protection circuit 1, output circuit 2, single chip machine controlling circuit 3; The output of temperature and over-discharge protection circuit 1 is connected with the input end signal of output circuit 2, input is connected with the input end signal of single chip machine controlling circuit 3, and the 12V power supply provides power supply to temperature and over-discharge protection circuit 1, output circuit 2, single chip machine controlling circuit 3.
As shown in Figure 2, described temperature and over-discharge protection circuit 1 comprise relay R elay, metal-oxide-semiconductor Q1, diode D1, resistance R 1; After being connected with the negative electrode of the 3rd pin, the first diode D1, the 1st pin of relay R elay is connected with the 12V power supply, the 2nd pin is connected with the anode of the first diode D1, the drain electrode of metal-oxide-semiconductor Q1, the 3rd pin is connected with normally-closed contact the 5th pin, the 4th pin is unsettled, and the 5th pin is as the output Vmain of temperature and over-discharge protection circuit 1; The grid of metal-oxide-semiconductor Q1 is connected with an end of the first resistance R 1, source ground, and the other end of the first resistance R 1 is as the signal end Control of temperature and over-discharge protection circuit 1;
Described output circuit 2 comprises 20V output main circuit, 20V output control circuit;
As shown in Figure 3, described 20V output main circuit comprises N-channel MOS pipe Q2, PNP triode Q3, inductance L 1, current transformer T1A, resistance R 2, diode D2～D3, capacitor C 1～C4, one end of the positive pole of the first capacitor C 1 and the second capacitor C 2, after connecting, one end of the first inductance L 1 is connected with the output Vmain of temperature and over-discharge protection circuit 1, the other end of the negative pole of the first capacitor C 1 and the second capacitor C 2, the collector electrode of PNP triode Q3, the source electrode of N-channel MOS pipe Q2, the negative pole of the 3rd capacitor C 3, ground connection after one end of the 4th capacitor C 4 connects, the end of the other end of the first inductance L 1 and the first current transformer T1A, the anodic bonding of the second diode D2, the positive pole of the negative electrode of the second diode D2 and the 3rd capacitor C 3, after connecting, exports the other end of the 4th capacitor C 4 the output 20V-OUT of main circuit as 20V, the other end of the first current transformer T1A is connected with the drain electrode of N-channel MOS pipe Q2, the emitter of the grid of N-channel MOS pipe Q2 and PNP triode Q3, the negative electrode of the 3rd diode D3 connects, the base stage of the anode of the 3rd diode D3 and PNP triode Q3, one end of the second resistance R 2 connects, the other end of the second resistance R 2 is as the input PWM of 20V output main circuit, described the first capacitor C 1, the 3rd capacitor C 3 are electrochemical capacitor,
As shown in Figure 4, described 20V output control circuit comprises the first chip U1, NPN triode Q4, current transformer T1B, resistance R 3～R10, capacitor C 5～C8, diode D4, the 1st pin of the first chip U1 and an end of the 5th capacitor C 5, one end of the 5th resistance R 5 connects, the other end of the 2nd pin and the 5th capacitor C 5, the other end of the 5th resistance R 5, one end of the 3rd resistance R 3, one end of the 4th resistance R 4 connects, one end of the 3rd pin and the 8th resistance R 8, one end of the 6th capacitor C 6, one end of the tenth resistance R 10 connects, one end of the 4th pin and the 9th resistance R 9, one end of the 7th capacitor C 7, the base stage of NPN triode Q4 connects, ground connection after the 5th pin is connected with an end of the 8th capacitor C 8, the 6th pin is connected with the input PWM of 20V output main circuit, the 7th pin connects the 12V power supply, the other end of the 8th pin and the 8th capacitor C 8, the other end of the 9th resistance R 9, the collector electrode of NPN triode Q4 connects the output V1 as the 20V output control circuit, the emitter of NPN triode Q4 is connected with the other end of the tenth resistance R 10, the other end ground connection of the 7th capacitor C 7, one end of the other end of the 8th resistance R 8 and the 7th resistance R 7, the negative electrode of the 4th diode D4 connects, one end of the anode of the 4th diode D4 and the 6th resistance R 6, the end of the second current transformer T1B connects, the other end of the other end of the second current transformer T1B and the 6th resistance R 6, the other end of the 7th resistance R 7, ground connection after the other end of the 6th capacitor C 6 connects, after the output 20V-OUT of the other end of the 3rd resistance R 3 and 20V output main circuit is connected as the feedback signal interface, the other end ground connection of the 4th resistance R 4, the model of described the first chip U1 is UC3843,
As shown in Figure 5, described single chip machine controlling circuit 3 comprises singlechip chip U2, operational amplifier U3, resistance R 11～R18, capacitor C 9～C11, the 1st pin of singlechip chip U2 and an end of the 11 resistance R 11, one end of the 12 resistance R 12 connects, one end of the 4th pin and the 13 resistance R 13, one end of the 9th capacitor C 9 connects, the 6th pin is connected with the signal end Control of temperature and over-discharge protection circuit 1, one end of the 7th pin and the tenth capacitor C 10, the 1st pin of the first operational amplifier U3, the 2nd pin of the first operational amplifier U3 connects, one end of the 10th pin and the 11 capacitor C 11, the 5th pin of the first operational amplifier U3, the 7th pin of the first operational amplifier U3 connects, the 14th pin ground connection, the 2nd, 3, 5, 8, 9, 11, 12, 13 pins are unsettled, the 3rd pin of the first operational amplifier U3 is connected with an end of the 14 resistance R 14, an end of the 15 resistance R 15, the 4th pin ground connection, and the 6th pin is connected with an end of the 16 resistance R 16, and the 8th pin is connected with the output V1 of 20V output control circuit, the other end of the 16 resistance R 16 is connected with an end of the 17 resistance R 17, an end of the 18 resistance R 18, the other end of the other end of the 11 resistance R 11, the other end of the 13 resistance R 13, the 15 resistance R 15, the other end of the 17 resistance R 17 all connect the 12V power supply, the other end of the other end of the 12 resistance R 12, the other end of the 14 resistance R 14, the 18 resistance R 18, the other end of the 9th capacitor C 9, the other end of the tenth capacitor C 10, the equal ground connection of the other end of the 11 capacitor C 11, the model of described singlechip chip U2 is PIC16F616T-I/SL, and the model of the first operational amplifier U3 is LM358.
The course of work:
As shown in Figure 2, the course of work of described temperature and over-discharge protection circuit 1 is: the 12V power supply provides operating voltage for temperature and over-discharge protection circuit 1, when temperature surpasses 65 degrees centigrade, the 6th pin of singlechip chip U2 is connected with the input Control of temperature and over-discharge protection circuit 1, control relay Relay breaking circuit, carry out temperature protection; When voltage, during lower than 8.5V, the 6th pin of singlechip chip U2 is connected with the input Control of temperature and over-discharge protection circuit 1, and control relay Relay breaking circuit, carry out Cross prevention, prevents that circuit from continuing externally electric discharge.
As shown in Figure 3; the course of work of described 20V output main circuit is: the positive pole of the first capacitor C 1 is connected with the output Vmain of temperature and over-discharge protection circuit 1; for it provides the operating voltage of 12V; through BOOST topology booster circuit, by the negative electrode of the second diode D2, be connected the output 20V-OUT that exports main circuit as 20V with the positive pole of the 3rd capacitor C 3.
As shown in Figure 4, the course of work of described 20V output control circuit is: the 6th pin of the first chip U1 is connected with the input PWM of 20V output main circuit, for the PNP triode Q3 in Fig. 3 provides switching signal, the 7th pin connects the 12V power supply, for the first chip U1 provides operating voltage, the 4th pin is connected with an end of the 9th resistance R 9, an end of the 7th capacitor C 7, is the first chip U1 configuration switch frequency, and the model of described the first chip U1 is UC3843.
As shown in Figure 5, the course of work of described single chip machine controlling circuit is: the 12V power supply is connected with an end of the 11 resistance R 11, an end of the 12 resistance R 12, the other end ground connection of the 12 resistance R 12, form a potential-divider network circuit, and for singlechip chip, U2 provides operating voltage; The 14th pin ground connection of singlechip chip U2, the 1st pin of the first operational amplifier U3 is connected with the 7th pin of singlechip chip U2, for it provides 12V supply voltage sampled signal, the first operational amplifier U3 the 7th pin is connected with the 10th pin of singlechip chip U2, for it provides the temperature sampling amplifying signal, the model of described singlechip chip U2 is PIC6F616T-I/SL, and the model of the first operational amplifier U3 is LM358.
Claims (1)
1. the 12V based on UC3843 turns the efficient boost circuit of 20V, it is characterized in that this circuit comprises temperature and over-discharge protection circuit, output circuit, single chip machine controlling circuit; The output of temperature and over-discharge protection circuit is connected with the input end signal of output circuit, input is connected with the input end signal of single chip machine controlling circuit, and the 12V power supply provides power supply to temperature and over-discharge protection circuit, output circuit, single chip machine controlling circuit;
Described temperature and over-discharge protection circuit comprise relay R elay, metal-oxide-semiconductor Q1, diode D1, resistance R 1; After being connected with the negative electrode of the 3rd pin, the first diode D1, the 1st pin of relay R elay is connected with the 12V power supply, the 2nd pin is connected with the anode of the first diode D1, the drain electrode of metal-oxide-semiconductor Q1, the 3rd pin is connected with normally-closed contact the 5th pin, the 4th pin is unsettled, and the 5th pin is as the output Vmain of temperature and over-discharge protection circuit; The grid of metal-oxide-semiconductor Q1 is connected with an end of the first resistance R 1, source ground, and the other end of the first resistance R 1 is as the signal end Control of temperature and over-discharge protection circuit;
Described output circuit comprises 20V output main circuit, 20V output control circuit;
Described 20V output main circuit comprises N-channel MOS pipe Q2, PNP triode Q3, inductance L 1, current transformer T1A, resistance R 2, diode D2～D3, capacitor C 1～C4, one end of the positive pole of the first capacitor C 1 and the second capacitor C 2, after connecting, one end of the first inductance L 1 is connected with the output Vmain of temperature and over-discharge protection circuit 1, the other end of the negative pole of the first capacitor C 1 and the second capacitor C 2, the collector electrode of PNP triode Q3, the source electrode of N-channel MOS pipe Q2, the negative pole of the 3rd capacitor C 3, ground connection after one end of the 4th capacitor C 4 connects, the end of the other end of the first inductance L 1 and the first current transformer T1A, the anodic bonding of the second diode D2, the positive pole of the negative electrode of the second diode D2 and the 3rd capacitor C 3, after connecting, exports the other end of the 4th capacitor C 4 the output 20V-OUT of main circuit as 20V, the other end of the first current transformer T1A is connected with the drain electrode of N-channel MOS pipe Q2, the emitter of the grid of N-channel MOS pipe Q2 and PNP triode Q3, the negative electrode of the 3rd diode D3 connects, the base stage of the anode of the 3rd diode D3 and PNP triode Q3, one end of the second resistance R 2 connects, the other end of the second resistance R 2 is as the input PWM of 20V output main circuit, described the first capacitor C 1, the 3rd capacitor C 3 are electrochemical capacitor,
Described 20V output control circuit comprises the first chip U1, NPN triode Q4, current transformer T1B, resistance R 3～R10, capacitor C 5～C8, diode D4, the 1st pin of the first chip U1 and an end of the 5th capacitor C 5, one end of the 5th resistance R 5 connects, the other end of the 2nd pin and the 5th capacitor C 5, the other end of the 5th resistance R 5, one end of the 3rd resistance R 3, one end of the 4th resistance R 4 connects, one end of the 3rd pin and the 8th resistance R 8, one end of the 6th capacitor C 6, one end of the tenth resistance R 10 connects, one end of the 4th pin and the 9th resistance R 9, one end of the 7th capacitor C 7, the base stage of NPN triode Q4 connects, ground connection after the 5th pin is connected with an end of the 8th capacitor C 8, the 6th pin is connected with the input PWM of 20V output main circuit, the 7th pin connects the 12V power supply, the other end of the 8th pin and the 8th capacitor C 8, the other end of the 9th resistance R 9, the collector electrode of NPN triode Q4 connects the output V1 as the 20V output control circuit, the emitter of NPN triode Q4 is connected with the other end of the tenth resistance R 10, the other end ground connection of the 7th capacitor C 7, one end of the other end of the 8th resistance R 8 and the 7th resistance R 7, the negative electrode of the 4th diode D4 connects, one end of the anode of the 4th diode D4 and the 6th resistance R 6, the end of the second current transformer T1B connects, the other end of the other end of the second current transformer T1B and the 6th resistance R 6, the other end of the 7th resistance R 7, ground connection after the other end of the 6th capacitor C 6 connects, after the output 20V-OUT of the other end of the 3rd resistance R 3 and 20V output main circuit is connected as the feedback signal interface, the other end ground connection of the 4th resistance R 4, the model of described the first chip U1 is UC3843,
Described single chip machine controlling circuit 3 comprises singlechip chip U2, operational amplifier U3, resistance R 11～R18, capacitor C 9～C11, the 1st pin of singlechip chip U2 and an end of the 11 resistance R 11, one end of the 12 resistance R 12 connects, one end of the 4th pin and the 13 resistance R 13, one end of the 9th capacitor C 9 connects, the 6th pin is connected with the signal end Control of temperature and over-discharge protection circuit 1, one end of the 7th pin and the tenth capacitor C 10, the 1st pin of the first operational amplifier U3, the 2nd pin of the first operational amplifier U3 connects, one end of the 10th pin and the 11 capacitor C 11, the 5th pin of the first operational amplifier U3, the 7th pin of the first operational amplifier U3 connects, the 14th pin ground connection, the 2nd, 3, 5, 8, 9, 11, 12, 13 pins are unsettled, the 3rd pin of the first operational amplifier U3 is connected with an end of the 14 resistance R 14, an end of the 15 resistance R 15, the 4th pin ground connection, and the 6th pin is connected with an end of the 16 resistance R 16, and the 8th pin is connected with the output V1 of 20V output control circuit, the other end of the 16 resistance R 16 is connected with an end of the 17 resistance R 17, an end of the 18 resistance R 18, the other end of the other end of the 11 resistance R 11, the other end of the 13 resistance R 13, the 15 resistance R 15, the other end of the 17 resistance R 17 all connect the 12V power supply, the other end of the other end of the 12 resistance R 12, the other end of the 14 resistance R 14, the 18 resistance R 18, the other end of the 9th capacitor C 9, the other end of the tenth capacitor C 10, the equal ground connection of the other end of the 11 capacitor C 11, the model of described singlechip chip U2 is PIC16F616T-I/SL, and the model of the first operational amplifier U3 is LM358.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101598982A CN103248224A (en) | 2013-05-02 | 2013-05-02 | UC3843 based and 12 V to 20 V efficient boost circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101598982A CN103248224A (en) | 2013-05-02 | 2013-05-02 | UC3843 based and 12 V to 20 V efficient boost circuit |
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| CN103248224A true CN103248224A (en) | 2013-08-14 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120319611A1 (en) * | 2011-06-16 | 2012-12-20 | Shenzhen China Star Optoelectronics Technology Co. Ltd | Boost Circuit for LED Backlight Driver Circuit |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120319611A1 (en) * | 2011-06-16 | 2012-12-20 | Shenzhen China Star Optoelectronics Technology Co. Ltd | Boost Circuit for LED Backlight Driver Circuit |
Non-Patent Citations (2)
| Title |
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| 刘占军等: "基于PIC16F676的电动车智能充电管理器的设计", 《电子世界》, no. 19, 31 October 2012 (2012-10-31), pages 34 - 35 * |
| 张世辉等: "《基于UC3843升压式程控开关稳压电源的设计》", 《电脑开发与应用》, vol. 24, no. 2, 28 February 2011 (2011-02-28), pages 49 - 51 * |
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Application publication date: 20130814 |