COB LED CHIP10 series 3 and what does it mean?
In the application process of high-power COB LED CHIP products and devices, heat dissipation, electrostatic protection, and welding have a great impact on their characteristics, which need to be highly valued by application customers.
LED high power COB LED CHIP lamp beads 10 series 3 parallel
(1) The first connection method is called three parallel and ten series, that is to say, it is 3 lamp beads in parallel first and then 10 groups in series. The second connection method is called ten strings and three parallels, that is, ten lamp beads are connected in series first, and then connected in parallel into three groups.
(2) It is also 30 lamp beads. If the power supply is used to drive the required current, voltage and power consumption, the power consumption is basically the same.
LED High Power COB LED CHIP Lamp Beads
(3) If there is poor quality: For example, when only one lamp bead is damaged, the first connection method, if the lamp bead is open, only the faulty lamp bead does not light up, and the rest of the lamp beads are still normal. The second connection method can not light at least the 10 lamp beads connected in series with the open circuit lamp bead.
As another example, what if one of the lamp beads is short-circuited. The first connection method will cause the three lamp beads in parallel to not light up, while the second connection method: the short-circuited lamp beads will cause the voltage of the positive and negative terminals of the series of lamp beads to decrease, which will cause them to be connected in parallel. The voltage of the other two groups (20 lamp beads) of the terminal decreases, which eventually causes the 20 lamp beads to fail to start (not light) due to insufficient voltage.
However, in the group with short-circuited lamp beads, except for the short-circuited lamp bead, the other lamp beads will be brighter than normal operation (that is because the other two groups cannot be started, so the other 9 lamps in the group with short-circuited lamp beads cannot be turned on). The lamp bead current will increase), and over time, the remaining 9 lamp beads will also be damaged.
