NR4018T220M

The LT3591 driver can drive up to ten white LEDs from a supply.

The unique feature of the LT3591 driver that allows it to function as a "one wire current source" is the high side LED current sense .

The typical application of the LT3591 white LED driver is to drive up to ten white LEDs in series from a Li-Ion cell. This allows for uniform brightness and eliminates the need for ballast resistors. The device features a high side LED current sense that enables it to function as a "one wire current source," simplifying the LED connection. It also has a high switching frequency that allows the use of tiny inductors and capacitors, and requires few external components. The driver has features such as one pin dimming and shutdown, 80:1 True Color PWMTM dimming range, open LED protection, and a 1MHz switching frequency. It operates with a VIN range of 2.5V to 12V and requires only a 2.2µF output capacitor. The LT3591 comes in a low profile 8-lead DFN package.