AL5814Q中文资料Automotive Compliant 60V LED Linear Dimmable LED Controller数据手册Diodes规格书

描述 Description

The AL5814Q is an 8-terminal adjustable linear LED 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 automotive LED lighting applications.

The AL5814Q 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 dropout 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 AL5814Q 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 AL5814Q’s output goes low turning off the external transistors. The device recovers 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.AL5814Q is available in the thermally enhanced MSOP-8EP package and is automotive-compliant, qualified to AEC-Q100 Grade 1, supporting PPAP documentation.

特性 Features

• Qualified to AEC-Q100 Grade 1
• Wide Input Voltage Range from 4.5V to 60V
• Configurable LED Current Setting
• 5% Reference Voltage Tolerance Across Operating Temperature
• Low Temperature Drift
• 15mA Output Drive Capability for MOSFET or Bipolar Transistor
• LED Open Protection Detected by VFAULT Pin
• PWM Dimming Realized Through VFAULT Pin
• LED Thermal Foldback Configured by VSET
• Overtemperature Protection (OTP)
• Input Undervoltage Lockout

应用 Application

• Automotive Rear Lamps
• Automotive Interior Lamps
• Automotive Instrumentation Illumination
• Automotive Position Lamps
• Automotive License Plate Illumination

简介

AL5814Q属于集成电路（IC）的LED驱动器。由制造生产的AL5814QLED 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。