Design and manufacture of power switch transistors for energy-saving lamps. Gao Zhengxin China Huajing Electronics Group's discrete device division, Wuxi 214061 transistor selection and design ideas. The reason why energy-saving lamps are thrifty is that electronic ballasts have replaced inductive ballasts. In the early 1960s, the design of electronic ballasts for energy-saving lamps appeared. However, until the late 1970s and early 1980s, due to the emergence of suitable power switching transistors, a truly practical electronic ballast was produced. The power device is also developed from the bipolar type tube to 1 minute 1; At present, the concept of green lighting is being popularized in China. China is gradually becoming the world's leading producer and exporter of energy-saving lamps, forming a giant power switch tube market and bipolar power. Switching crystal screw is becoming the main choice of China's energy-saving lamps and electronic ballast manufacturers due to its price advantage and reliability. This paper mainly introduces the selection and design ideas of the energy-saving lamp electronic ballast 1 power switch body tube. 2 The principle of energy saving of fluorescent lamps and the principle of energy saving for electronic ballasts 2.1 The main method of saving energy of fluorescent lamps is to increase the frequency of AC power supply. The research proves that when the power supply frequency of fluorescent lamps is increased from 50 to 50, the lighting effect is greatly increased. When the power supply frequency is increased from 50 to 20 volumes, the lighting effect is increased by 10. Under the premise of constant input, the lighting effect, 1 varies with frequency 0. At present, the frequency of electronic ballasts in China is as high as 25,0522 in the 25-received date of 20,052. It is maintained at 4, its principle and especially 1 and 0 constitute a resonant circuit, and 2, the composition of the starting road, from, 1 Claw 2 provides a feedback drive, ie a power switching transistor, in this circuit = 7. When the alternating current is 220, it is approximately 310 by ballasting. 970 therefore. The circuit is suitable for low-voltage power supply areas, such as the US and Japan, 120 power supply areas. 3.2 Half-bridge voltage-fed inverter As this circuit is suitable for China's power grid conditions, it has become a manufacturer of energy-saving lamps and electronic ballasts in China. Kushiro, so, make an appropriate analysis. 6. 3 electronic ballasts commonly used inverter circuit, 6 typical half-bridge type 1 pressure feed hiccups, the road is the inverter and the inverter is the base block. Also the most critical side and the middle of the passive side 1 consisting of 4, the load current is rectified. More than 20 kHz is still the frequency and current generated. There are many circuit forms, and the factory introduces two main inverter circuits and analyzes the requirements for transistors. 453.1 Current Push-Pull Inverter 2.2 Fluorescent Lamps The basic requirements for electronic ballasts 8 provide sufficient starting voltage to ensure the start-up of the lamp, and the ignition of the lamp provides a suitable stable operating current. Rating. So also keep, basically unchanged 1Ll2. 4. Must have a higher security personality, its 3.1 is to select and set a tube to be two points of illusion, the rear path is provided by lt; 3, 4, 2 and bidirectional trigger tube 2, called. The start-up circuit is composed of components in the oscillator and power switches. The resonant frequency of the series circuit composed of 0 also determines the quality of the circuit, which is ==L=. The transistor core and waveform in the steady-state circuit after ignition of the Thai lamp 0. Lamp current in China, the current export tube uses this circuit, and the domestic low-cost lamp uses the method of serially connecting capacitors on 24 to replace the trigger tube to reduce the cost, but the high-power lamp is not used. In this circuit, when the mains is 3, the voltage that the transistor is subjected to is . You, when the voltage is, =2382. 4 Electronic ballast power switch body tube design When the 1 and æ¿ are selected, the load curve can be drawn. Due to the inverting nature of the transistor, and the waveform does not change ideally with the input waveform. A few delays. Therefore, the switching speed is limited in the electronic ballast, the main reason for affecting the quality of the transistor is the off time r, ti, so the design is limited to a low limit and the energy saving lamp is taken as an example. The design requirement is 6 4.2 breakdown voltage from 3.13. In .2 we know that the power switch crystal of the inverter is 5. It is the key parameter. and. When 1 is 0120. The current push-pull inverter 6 4 is used as the mains voltage. When the mains is 220. Generally, a half-bridge voltage-fed inverter is used, =1.30, and from 81 and 32, in general, the voltage in the circuit is 380, therefore. For the body tube of my energy-saving lamp. The pipe of 7.1400 is selected as the example of the half-bridge voltage-fed inverter which is commonly used in China. 4.1 Switching time we know quickly. The working state of the crystal tube is the amplification cutoff and saturation. Its output curve is 8. When testing the transistor for the 30 boundary lamp, it is smaller. In fact, the analysis is combined with 8 because the design is too small and the linearity is too small, causing the tube to change too much, causing the tube to enter the saturation region. When used, the lamp power is small and the heat is generated. It even caused damage to the fuses because of the good results. 4.4 scanning power core, due to factors, there is a cross power of 1 when the power transistor is turned off. 6. The larger, 1. The larger the frequency, the high-frequency current sometimes causes the transient power breakdown of the transistor, so the energy-saving lamp parent People have been paying attention to this in recent years, and they choose to use them as =200400. I suggest that the rectified output voltage should be about 3 stomachs and the temperature of the 30-zone lamp should be 4.5. The temperature is the same as the heat of the crystal. Features, compact energy-saving lamps or electronic choke chambers with higher temperatures, will cause up and down 10. and. Larger 12. This change causes the drift of the operating point and its own power loss, which is large. Causes a vicious ring. It even caused thermal breakdown of the tube. 5 improve the design of switching power transistor parameters and 1 art practical technology 5.1 choose to use single wafer and use the re-diffusion process material according to the yield and the whole lamp to the device requirements of the device or single-chip resistivity selected 3055, 1 diffusion diffusion When the deep 15019 resistivity and the thickness of the high-resistance layer are selected, the factors of the square plant and the pair should be taken into account. 5.2 The appropriate active area should be designed according to the requirements of the whole lamp. Under the conditions of guarantee, taking into account both AC and DC, and two factors, in the case of the definition of the main control and, in the case of not affecting the shirt, 5, can use the lower and at the same time also have a regulatory effect. 5.3 Reasonable terminal structure base broadening distinguishes the pressure ring X attention. According to different knot depth and expansion, concentration. Different width zones can be used, and the junction depth can be 15251. The 45 75 terminal design of the widening zone also adopts the glass countertop process, but it is rarely used because of its high temperature. The current domestic design uses a ring of 3 rings for the breakdown voltage and cost. The design should pay attention to the relationship between the depth of the knot and the design of the widened area. If the fire is too small for the deepening of the knot, the failure of the partial pressure ring will be weakened. 13 5.4 new type of power switch quality transistor with damper pole tube. This kind of similar technology is widely used in the production of color TV tubes. At present, many power switching transistors are also gradually adopting this technology. The middle pole tube is also called a freewheel tube, and the purpose is to prevent the transistor from being damaged due to reverse conduction. Version design 15. 6 Conclusion China's energy-saving lamp transistors are mainly bipolar power switching transistors. This paper introduces the main circuit used by the whole lamp manufacturer. Through the brief analysis of the circuit, the selection method of the main parameters of the power transistor switching transistor for energy-saving lamps is proposed. At the same time, it provides some experience and new progress in the actual work of the wooden man. Inlay and interim, the application circuit and device selection of the whole lamp are constantly changing. According to different occasions and device parameters, they have designed many circuit functions such as force and mouth circuit protection. Factor correction circuits, etc., are used to properly apply these devices, and as a device manufacturer. Since the process equipment condition +4 is different from the village material selection to the plate design process flow, and the choice of parameters is also different, here is the special law. but. At present, most of the power switching transistors used in my 1 small and medium power energy-saving lamps have adopted domestic brands. This is a happy thing, but from the development of new devices. Such as 纟105 Yang 6 Ding and so on are still in the test or sample stage, and the gap between Europe and the United States is very large, so it is still necessary to work hard to catch up. The comprehensive information of the company has been developed to adopt 18, design specifications of 25, 1 yang, 5 products , samples have been sold now. Recently, as the performance of information equipment such as high-end service workstations continues to increase, for the main memory that affects the performance of these systems, it requires a lot of history and faster speed. In this case, in order to facilitate the transmission of the next generation of Gugao data, 2. As a future development target, Betty seeks products with a larger capacity of 51 continents 1 and a higher speed of 2.708 grades. 1 cut 8 data transmission speed. Take a high speed of 0.1〃1. , 01 art and by making the clock 1 edge and the bottom edge to synchronize the data output, for the Shanghai, the clock frequency, the 21. coffee data transfer speed. In terms of the frequency measured by the external clock 13, the data transmission speed 1 can reach 26 circles. When the power supply voltage is 2.5, as a high-speed small-amplitude interface circuit, the most appropriate 6SSTL2256MbDDRSDRAM is used in a memory with a relatively fast transmission speed. . Implemented on the same chip, 0 30 Li and Yang in the latter half of the silicon circle wide 1 art, the realization of the use of metal mask. 501; The conversion of Song, such as the requirements of a factory in the factory can quickly violate the production volume, from April 201, began to batch production of 50,000 to 2000, half-year production of up to 50 7 water, wood The appearance of the product, the history of the history of the storage capacity required for the personal juice machine, etc.
With zinc as the base,the product is added 2 to 15% aluminium,with welding flux content of 10 to 20%
Wildely used in copper-aluminium,copper bus-aluminium foil,Aluminium-aluminium and aluminium alloy welding.
Welding Wire,Flux-Cored Copper Aluminum Welding Wire,Mig Welding Wire,Aluminium Welding Wires Shaoxing Tianlong Tin Materials Co.,Ltd. , https://www.tianlongspray.com