AL5814中文资料60V LINEAR DIMMABLE LED CONTROLLER数据手册Diodes规格书

描述 Description

The AL5814 is an 8-terminal adjustable linear LED driver-controller offering excellent temperature stability and output current capability. It works with a wide input voltage range from 4.5V to 60V. With an external LED driving power device, its internal power dissipation is minimized compared with traditional linear LED drivers. This makes it ideal for medium to high current LED circuits.The AL5814 has internal output drive capability up to 15mA, which enables it to drive external Bipolar transistors or MOSFETs. It also provides the capability to drive longer LED chains with low drop-out voltage and multiple LED channels.VSET pin is used to directly set output current feedback level. Using a resistor divider between REF pin and VSET pin, the output current can be set. Additionally, the use of an NTC resistor allows the creation of an accurate and configurable thermal fold-back behavior.The AL5814 provides an LED-open detection feature through its VFAULT pin. If VFAULT is brought lower than 2.5V (by any one of the multiple LED channels going open) the AL5814’s output will go low turning off the external transistors. The device will recover when the open condition is removed. This ability of VFAULT to turn off the external transistors also allows PWM dimming of the LED current by adding PWM control signal on VFAULT pin.The AL5814 uses application of power to enable the LED strings. If a separate enable pin is needed the AL5817 should be used.The AL5814 is available in the thermally enhanced MSOP-8EP package.

特性 Features

•Wide Input Voltage Range from 4.5V to 60V
•Configurable LED Current Setting
•4% Reference Voltage Tolerance 
•Low Temperature Drift
•15mA Output Drive Capability for MOSFET or Bipolar Transistor
•LED Open Protection Detected by VFAULT Pin
•LED Thermal Fold-back Configured by VSET
•OverTemperature Protection (OTP)
•Input Under Voltage Lock-Out
•PWM Dimming Realized Through VFAULT pin

应用 Application

•Automotive Rear Combination Light
•LED Signs
•Instrumentation Illumination
•Refrigerator Lights

简介

AL5814属于集成电路（IC）的LED驱动器。由制造生产的AL5814LED 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。