DOB LEDs, which are circular in shape and work with direct city electricity, 220 volts of Iranian electricity, and there is no need for a source between LEDs and city electricity, ie they no longer need an LED driver.
The problem of placement and multi-occupation of drivers for LED products has led to the production of these products. At the same time, capacitors are temperature sensitive. We must minimize these thermal stresses by connecting the drivers separately, otherwise the heat carrier generated by the electrode will move and be damaged.
DOB products use smaller ICs in DOB or driverless products to replace capacitors to reduce production costs, but over time it has become clear that DOBs are not a good solution because on the other hand they are very important components in noise cancellation and Are circuit breaker components.