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A 100 W LED street lamp power solution based on ST STLUX385A digital controller

Published time : 2019-04-23 LED,Digital controller
Digital control is the key to energy saving for outdoor lighting.The STLUX385A controller enables outstanding performance in 100 W street lighting not only at full load but also at idle.LED brightness can be reduced to very low current with maximum accuracy with daylight control.The communication interface can be controlled remotely.

Solution Introduction

Digital control is the key to energy saving for outdoor lighting.The STLUX385A controller enables outstanding performance in 100 W street lighting not only at full load but also at idle.LED brightness can be reduced to very low current with maximum accuracy with daylight control.The communication interface can be controlled remotely.

The solution could support power line modems and wireless communications links to connect modules to a smart grid, paving the way to a smart city.

Scene application diagram


Display photos


Scheme block diagram


Core technology advantages

[energy saving]

• 92% efficiency at full load

• consumption <200 mW in idle condition

• high precision of LED brightness control:

• 11-bit equivalent current resolution

• turn down to 10 mA current level

• remote control and connection to the smart grid

Project specifications

The STLUX385A digital controller has two stages of power conversion

• PFC

• zero voltage switching (ZVS)LC resonant stage

• primary side supervision LED current control

• analog and digital dimming accuracy is 2%

• communication interfaces are available

DALI (DALI)

• UART

•0-10 V isolation line

• supports PLM and wireless modules

The keyword

ST STLUX385A digital controller 100 W LED street lamp power supply

Key Components

No. Part Number Manufacturer
1 STLUX385ATR ST
2 STLUX385A ST