STEVAL-LLL002V1: 4*12 Smart LED Array for Automotive

Summary

The STEVAL-LLL002V1 is a LED array driver system evaluation board with local dimming and diagnostics for automotive applications. It is based on the ALED1262ZT 12-channel LED driver controlled through the STM8AF6266 microcontroller I²C interface. A 48 red LED matrix is driven by four ALED1262ZT LED drivers. The on-board A7986A DC-DC converter, accepting standard adapter input voltages with reverse polarity protection, provides the voltages and power for the board operation. The STEVAL-LLL002V1 evaluation kit jumpers simulate LED open circuit faults and the 4-pin SWIM connector is used to debug and develop the STM8AF6266 microcontroller firmware.

The evaluation kit can operate in bus driven mode (BDM), standalone mode (SAM) and GUI mode. In the bus driven mode, the board is controlled via on-board push buttons and potentiometers. Commands to the ALED1262ZT driver are sent by STM8A microcontroller over I²C bus. In the standalone mode, the STEVAL-LLL002V1 evaluation kit is not controlled by the MCU and you can select two possible output configurations using OTP ½ SPDT switch (SW2). In the GUI mode, the board is connected to a PC via USB-UART bridge and you can observe and control various features of the driver through the graphical user interface.

The STEVAL-LLL002V1 evaluation kit consists of the STEVAL-LLL002M1 main board and the STEVAL-LLL002D1 USB-UART bridge.

Specifications

Manufacturer	STMicroelectronics
Category	Lighting
Sub-Category	LED Drivers - DC In
Eval Board Part Number	497-19566-ND
Eval Board Supplier	STMicroelectronics
Eval Board	Normally In Stock
Voltage In	12 ~ 24 V
Topology	Step Down
Current Out	3 A
Voltage Out (Max)	2.9 V
Outputs and Type	12 Non-isolated
Efficiency @ Conditions	>90%, 5V in, 3.3V @ 0.15 ~ 1.1 A >85%, 24V in, 12V @ 1.1 ~ 2.6 A >80%, 5V in, 1.8V @ 0.15 ~ 1.2 A
Features	Dimming Control GUI / Design Software I²C Interface MCU Controlled Memory Available On-Board UART Interface
Switching Frequency	250 kHz ~ 1 MHz
Component Count + Extras	200 + 10
Design Author	STMicroelectronics
Application / Target Market	Automotive Lighting: LED Signage
Main I.C. Base Part	A7986A ALED1262ZT
Date Created By Author	2019-06
Date Added To Library	2019-12