Another important concern is the balance of currents that flow in multiple strings. We know that two or three strings of LEDs will have different combined forward voltages. The LED driver will deliver ...

Linear constantcurrent drivers, for instance, offer low EMI, low cost, and use only a few components. Many designers favor them for low-current applications where power loss is a minor concern. If ...

A common method for drivingmultiple power LEDs is throughtwo parallel strings. This inexpensiveand less critical driver circuit can providea lower voltage. However, the driver circuitmust deliver ...