This document is about LT3593, LT3593 is a white LED driver that supports 1-Wire current programming. It can drive up to 10 white LEDs in series from a single lithium-ion cell, ensuring matched LED current and eliminating the need for ballast resistors. The device has an internally compensated step-up DC/DC converter that switches at 1MHz, so it can be used with tiny, low profile external components. The LT3593 features an internal 5-bit DAC, allowing the LED current to be programmed using only one pin. The device features true output disconnect in shutdown as well as a unique high side current sense allowing it to function as a "1-wire" current source where the low side of the LEDs can be connected to the power supply, without the need for external resistors.
The LT3593 is an internally compensated step-up DC/DC converter that switches at 1MHz. It features an internal 5-bit DAC allowing LED current to be programmed using only one pin, eliminating the need for ballast resistors. The device supports true output disconnect in shutdown and functions as a '1-wire' current source.
The LT3593 is designed to drive up to ten white LEDs in series from a single lithium-ion cell.
The full-scale current for the programmed LED output is 20mA.
An open fault is triggered when the output voltage Vcap reaches 38V.