The lash-up lamp with this unifinication energy-saving electron, because use already energy-saving lamp regards the electron that finished product changes as lamp holder, have the following profit: 1. Use local materials, the supermarket is supplied in great quantities; 2. Section report benefit is apparent, omit report than incandescent lamp head 70 ％ ～ 80 ％ ; 3. DC ／ DC change-over circuit is contractible bulk. This lamp by 12V accumulator power supply, suit illume of lash-up of power cut area with, also can provide portable lash-up light for individual business booth and rural specialist, in order to replace tube of " of " benzine, kerosene, very advantageous to environmental protection.
Working principle: Principle of this lamp report is shown like plan institute, the transformer of DC of ／ of push-pull type DC that is a model, by switch control of wide modulation of ICl arteries and veins implement and amplifier of periphery double operation the composition such as A1 and A2, its oscillation frequency is decided by the ⑥ of ICl and the time resistor on ⑦ foot and time capacitance, make an appointment with 35kHz left and right sides. Work roughly the process is as follows: By ICl ⑾ and ⒁ foot output two groups of phasic and contrary square wave pulse to be in charge of via power field effect Q1 and Q2 magnify and passages through which vital energy circulates develops transformer step up, output makes an appointment with the high frequency voltage of 230V, however the bridge-type commutate that by D1 one D4 comprises turns into to shed high pressure continuously, classics L1 store can inductance is being loaded last to be defeated
Give capacitance C5 to carry load current. Process of stabilized voltage feedback is: Feedback signal is pressed by R8 and R9 cent and send voltage to follow implement A2, on the ① foot that sends ICl again and ② foot fiducial make quite, the feedback that finish is controlled, achieve output to be value of 300V stabilized voltage thereby. Voltage comparator A1 is owed for batteries press a directive, when the input batteries drops to when 10.8V is the following, voltage comparator retroflexions, output is tall n and illume LEDl, batteries is received to must charge outside informing.
Yuan requirement of parts of an apparatus and assemble: Integrated circuit ICl is SG3524 of controller of switch power source, double carry puts A1 and A2 to be LM358, all insert continuously for biserial. Resistor capacitance all is groovy series, among them oscillation capacitance C4 should choose CBB filmy capacitance. Punch of arteries and veins implement T1 uses core of magnetism of body of E128 swage oxygen, primary with Φ0. Crewel of 6ram enamel-insulated wire circles 14T, central take a percentage of a deal; Sub circle 270T with Φ0.27mm enamel-insulated wire, mat insulation film should be added between the layer. The ring of high frequency magnetism that L1 inductance takes a diameter to be 18ram is strung together with Φ0.31mm enamel-insulated wire circle 50T can. The attention when assembling matchs on pipe of two field effect with small-sized radiator, there is finished product on the market. Debug very simple: Receive on 12V accumulator should work normally, wait for batteries to drop to LO.8V when, corrective potentiometer Wl makes LEDl just illumed can.
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