ALED6001数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The ALED6001 is an automotive-grade (AECQ100 compliant) LED driver that combines a boost controller and high-side current sensing circuitry optimized for driving one string of high-brightness LEDs. The device is compatible with multiple topologies such as boost, SEPIC and floating load buck-boost. PWM dimming of the LED brightness is achieved by means of an external MOSFET in series with the LED string and directly driven by a dedicated pin. The pin that manages the LED current setting, usually connected to an external resistor, can also be used as analog control if a microcontroller is located in the LED module. The high-side current sensing, in combination with a P-channel MOSFET, provides effective protection in case the positive terminal of the LED string is shorted to ground. The high precision current sensing circuitry allows an LED current regulation reference within ± 4% accuracy over the entire temperature range and production spread. A fault output (open-drain) informs the host system of faulty conditions: device overtemperature, output overvoltage (disconnected LED string) and LED overcurrent.

特性 Features

• AECQ100 qualification
• Switching controller section
•5.5 V to 36 V input voltage range
•Very low shutdown current: ISHDN < 10 μA
•Internal +5 V LDO for gate driver supply
•Internal +3.3 V LDO for device supply
•Fixed frequency peak current mode control
•Adjustable (100 kHz to 1 MHz) switching frequency
•External synchronization for multi-device applications
•High performance external MOSFET driver
•Cycle-by-cycle external MOSFET OCP
•Fixed internal soft-start
•Programmable output OVP
•Boost, buck-boost and SEPIC topologies supported
•Thermal shutdown with autorestart
•Output short-circuit detection
• LED control section
•Up to 60 V output voltage
•Constant current control loop
•High-side output current sensing circuitry
•30 to 300 mV differential sensing voltage
•± 4% output current reference accuracy
•Output overcurrent protection
•Sensing resistor failure protection
•PWM dimming with auxiliary series switch
•Analog dimming

简介

ALED6001属于集成电路（IC）的LED驱动器。由制造生产的ALED6001LED 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。