STEVAL-TLL001V1开发板套件编程器的评估板-LED驱动器规格书PDF中文资料

STEVAL-TLL001V1属于开发板套件编程器的评估板-LED驱动器。由意法半导体集团制造生产的STEVAL-TLL001V1评估板 - LED 驱动器LED 驱动器评估板是带有元器件的电路板，用于提供特定电路或器件的工作实例。该系列评估板提供一个 LED 驱动器实例，用于可调节闪烁、模拟亮度、背光、双极开关、升压转换器、亮度控制、相机闪光灯、可调光、恒流和 RGB 控制，以及更多其他应用。

Description

This evaluation board is based on the STLD40D that is a boost converter that operates from 3.0 V to 5.5 V and can provide an output voltage as 37 V and can drive up to 10 white LEDs in series. The converter is a PFM (pulse frequency modulation) inductor switches and can work in discontinuous (DCM) mode operation. A minimum OFF time of the embedded boost switch TSW is fixed internally and allows limiting the switching frequency. The output current capability is 20 mA with an output voltage of 37 V. The regulation is done by sensing the led current through the resistor RLED. The device can be turned ON/OFF through the logic enable signal pin EN. Applying a low frequency PWM signal the LEDs can be dimmed. The maximum peak inductor current can be programmed.

Features

■ Inductor switches boost controller

■ PFM mode control

■ High efficiency over wide range of input voltage from 3.0 V to 5.5 V

■ Over-voltage protection with automatic restart

■ Adjustable peak current limit

■ Enable pin with possibility of PWM dimming control

■ Low shutdown current