DESCRIPTION
The LT®3593 is a step-up DC/DC converter designed to drive up to ten white LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors. The device features a unique high side LED current sense that enables the part to function as a “one wire current source” where the low side of the LED string can be returned to ground anywhere. Additional features include output disconnect in shutdown, open LED protection and 1-pin shutdown/LED current control. The CTRL pin is toggled to adjust the LED current via an internal counter and a 5-bit DAC. Constant frequency switching results in low input noise and a small output capacitor. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. FEATURES
n n n n n n n n n n Drives Up to Ten White LEDs from a 3V Supply One Pin Shutdown and Current Programming LEDs Disconnected...
Linear Technology
