Precautions for the use of the hottest three termi

Three factors: sharing resources, flat organizational structure, 1. All services that are responsible for entrepreneurs. Notes on the use of integrated voltage stabilizing circuits at the main end

(1) distinguish three leads. When the input, output and grounding terminals of the three terminal integrated voltage stabilizing circuit are installed incorrectly, they are easy to be damaged, which requires special attention. At the same time, the grounding terminal of the three terminal integrated voltage stabilizing circuit must be well welded during installation, otherwise during use, the loosening of the grounding terminal will lead to the fluctuation of the output voltage, which is easy to damage other circuits on the output terminal, and may also damage the integrated voltage stabilizing circuit. In addition, disconnect the power supply before disassembling the integrated voltage stabilizing circuit; When the output voltage of the three terminal integrated voltage stabilizing circuit is greater than 6V, the input and output terminals of the power supply should be cut off in time, and a protective diode should be connected to prevent the damage of the three terminal integrated voltage stabilizer caused by the discharge of the output capacitor to the output terminal when the input voltage suddenly decreases

(2) correctly select the input voltage range. The three terminal integrated voltage stabilizing circuit is a semiconductor device, and the internal tube has a certain withstand voltage value. Therefore, the winding voltage of the transformer cannot be too high, and the maximum output voltage of the rectifier cannot be greater than the maximum input voltage of the integrated voltage stabilizing circuit. The maximum input voltage of 7805 (7905) -7818 (7918) is 35V, and the maximum input voltage of 7824 (7924) is 40V. As an industry expert, there is a limit of using the minimum voltage difference (the difference between input voltage and output voltage) in the three terminal integrated voltage stabilizing circuit, so the winding voltage of the transformer cannot be too low. The minimum input and output voltage difference of the three terminal integrated voltage stabilizing circuit is about 2V. Generally, this pressure difference should be maintained at about 6V

(3) ensure good heat dissipation. For the high-power but high toughness polypropylene composed of three terminal integrated voltage stabilizing circuit, the bright and dark stripe rate voltage stabilizing power supply is often produced in the injection molding process of some large parts. A radiator of sufficient size shall be installed on the three terminal integrated voltage stabilizing circuit. When the area of the radiator is not large enough and the junction temperature of the internal regulating tube reaches near the protection action point, the voltage stabilizing performance of the integrated voltage stabilizing circuit will become worse