Deriving Maximum Current from Multichannel LED Drivers
LED lighting is becoming increasingly prevalent in automotive applications, such as LCD backlighting in infotainment, where numerous LEDs must be driven in series and parallel. Typical multichannel LED drivers can drive nine series LEDs in four parallel strings, 36 LEDs maximum. In many applications, 36 LEDs may be sufficient. This paper describes how to increase the number of LED channels and how to drive LEDs at higher current levels than the individual current sink rating.