STEVAL-ILL022V1 STMicroelectronics, STEVAL-ILL022V1 Datasheet - Page 5

• Manufacturer Part Number: STEVAL-ILL022V1
• Description: BOARD & REF DESIGN
• Manufacturer: STMicroelectronics
• Series: -r

Specifications of STEVAL-ILL022V1

• Design Resources: STEVAL-ILL022V1 Schematic STEVAL-ILL022V1 BOM
• Main Purpose: Reference Design, Solar Charger, LED Driver
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: STM32F101R
• Primary Attributes: 25W LED Driver, 80W Battery Charger
• Secondary Attributes: Automatic day/night/weather detection, automatic battery/mains switch over
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

UM0512
2
General description
The solar-LED streetlight controller is the key element of the system, also comprising the
solar panel, battery and LED streetlight (lamp).
Figure 2.
Each block’s function is described below.
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The solar-LED streetlight controller plays the key role in the system for electricity (solar
energy) storage control and LED lamp light-on/-off control.
The sunlight delivers pockets of photons (solar energy) to the solar panel (also called
photovoltaic or PV module). The photons (energy) are absorbed by the PV module and
electrons are released.
The electrons flow along the metal contact of the PV module and create electricity. The
battery charger then converts the electrical energy and charges the battery.
The battery stores the electricity supplied by the battery charger. The controller
monitors the status of the battery.
The LED lamp (LED streetlight) is activated by the LED driver. The LED light controller
monitors the system and controls the light-on and light-off in daytime and nighttime.
When the battery goes low, the controller sends an enable signal to the mains switch
and the AC offline power supply is enabled.
The AC offline power supply (not covered in this document) acts as a backup source to
power the LED streetlight.
System block diagram
Doc ID 14469 Rev 2
Figure 2
shows the structure of the system.
General description
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