ZXLD383中文资料low-voltage-dc-dc-led-drivers数据手册Diodes规格书

描述 Description

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. The ZXLD383 uses a PFM control technique to drive an internal switching transistor which exhibits a low saturation resistance. This ensures high efficiency, even for input voltages as low as 1.0V. The IC can start up under full load and operates down to an input voltage of below 0.9V. The ZXLD383 is offered in the space saving TSOT25 package or in die form, offering an excellent cost vs performance solution for single cell LED driving applications.

特性 Features

85% efficiency
User adjustable output current
Single cell operation
Low saturation voltage
TSOT25 package
Available also in die form
Simple application circuit

应用 Application

Garden lights
Door/pathway illumination
LED flashlight and torches
LED backlights
White LED driver
Gated boost supply generator

简介

ZXLD383属于集成电路（IC）的LED驱动器。由制造生产的ZXLD383LED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。