50 w solar street light quotation

More than rated current for a long time, can greatly shorten the service life of the LED lamp bead. 3, solar street lamp power supply voltage: generally recommended voltage is 30 - LED 35 v, after the test, the most in 32 v, so according to the calculation formula of the 32 v is quite reasonable. 4, what is the current solar street lamp power supply

1, LED lighting, the characteristics of raw materials decision-making and its environmental hazard, such as temperature rise, LED the power flow increases, the working voltage of the ascension, LED the electrical flow also increases. Long-term beyond the rated voltage, can greatly shorten the LED LED lamp bead lifetime. And LED constant current power supply is in the environment elements such as temperature and voltage shift, ensure the current will not change.

2, solar lamp switch power supply constant current power supply precision: sales market with constant current power supply switch power supply precision is poor, as up to date on market at present is strongly recommend plans such as constant current power supply plan, deviation do & plusmn; 8%, constant current power supply deviation is very large. General provisions in & plusmn; 3% is ok. According to 3% of the design, production and manufacturing to carry out adjustment switch power supply can do & plusmn; Deviation of 3%.

3, the working voltage of solar energy lamp switch power supply: general LED strongly recommend working voltage is 3. 0 - 3. 9 v, after the examination, the vast majority of the 3. 2 v, so the press 3. Measure 2 v type is more effective. N = 3 LED lamp bead string of total working voltage. 2*N。

4, how much solar energy lamp switch power flow of electricity is the best: such as the LED the rated voltage of 350 mah, some factories use do from the start, the design scheme of 350 mah, electrical flow distributed hot is very serious, in fact this several comparison experiment, the design scheme to 320 mah is comparatively ideal. Try to avoid heat value and make a large amount of electromagnetic energy come not visible light energy.

5, solar lamp power supply board series and parallel with wide working voltage more wide: to the work in the type of LED solar light switch power supply voltage AC85 - category is relatively wide category 269 v, the LED lamp board series and parallel method is very important. As far as possible should not be used wide working voltage, can be divided into AC220V, AC110V classified as far as possible, so can guarantee the credibility of switch power supply.

because at this stage of the switching power supply is not commonly protective blood pressure constant current power supply, the prescribed working voltage 110 v, output voltage need not more than 70 v, string for no more than 23 string. Type the working voltage of 220 v output voltage can reach 156 v. In other words, series number less than 45 series. Serial number need not too much, otherwise electric flow is very big, and hot switch power supply is more serious. Plans, there is also a wide working voltage APFC digital power amplifier output power compensation is first the working voltage up to 400 with L6561/7527 v, followed by a drop in blood pressure, is equal to 2 power transformer. Can this plan under special conditions.