
Zetex => Diodes
Summary
The ZXLD383 is a single or multi cell LED driver designed for applications requiring step-up voltage conversion from a very low input voltage. The IC generates constant current pulses that are ideal for driving single or multiple LEDs over a wide range of operating voltages. It includes an on/off enable input that can be driven directly from a photocell array or an open collector/drain logic output. The enable input features an ultra-low voltage drop diode to ground, eliminating the need for a photocell array isolation diode in Garden Light applications.
FEATUREs
• 85% efficiency
• User adjustable output current
• Single cell operation
• Low saturation voltage
• TSOT23-5 package
• Available also in die form
• Simple application circuit
APPLICATIONs
• Garden lights
• Door/pathway illumination
• LED flashlight and torches
• LED backlights
• White LED driver
• Gated boost supply generator