The LM3421/23 Buck-Boost/Boost supports a wide input voltage range of up to 75V Input/Output, allowing for up to 18 LEDs to be connected in series for one LED driver, which has the benefit of reducing overall costs. Also, as the MOSFETs are external on the LM3421/23, the device is capable of driving large loads of up to 10A. Robust fault protection and indication features further protect and extend the lifetime of the LEDs.