ALED7707中文资料6排85 mA LED驱动器，具有升压调节器，用于LCD面板背光数据手册ST规格书

描述 Description

The ALED7707 device consists of an automotive grade (AEC Q100 compliant) monolithic boost converter and six controlled current generators (rows) specifically designed to supply LED arrays used in the backlighting of LCD panels. The device can manage an output voltage up to 36 V (i.e.: 10 white LEDs per row).

The generators can be externally programmed to sink up to 85 mA and can be dimmed via a PWM signal (1% dimming duty cycle at 1 kHz can be managed). The device allows to detect and manage the open and shorted LED faults and to let unused rows floating. Basic protections (output overvoltage, internal MOSFET overcurrent and thermal shutdown) are provided.

特性 Features

• AEC-Q100 qualification
• Boost section
•4.5 V to 36 V input voltage range
•Internal power MOSFET
•Internal +5 V LDO for device supply
•Up to 36 V output voltage
•Constant frequency peak current-mode control
•250 kHz to 1 MHz adjustable switching frequency
•External synchronization for multi-device application
•Pulse skip power saving mode at light load
•Programmable soft-start
•Programmable OVP protection
•Stable with ceramic output capacitors
•Thermal shutdown
• Backlight driver section
•Six rows with 85 mA maximum current capability (adjustable)
•Rows disable option
•Less than 10 μs minimum dimming on-time
•± 3% current matching between rows
•LED failure (open and short-circuit) detection

简介

ALED7707属于集成电路（IC）的LED驱动器。由制造生产的ALED7707LED 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。