Introduction
The
AEK-MOT-TK200G1
evaluation board has been developed to drive the opening/closing systems of the car power lift gates,
ensuring high levels of safety and reliability.
The board offers the possibility of driving three different motors. Two motors raise and lower the car tailgate, while the third
motor locks the trunk.
The board also allows driving two different high input capacity loads, that is, two strings of LEDs. One string lights up the interior
of the trunk when it is open, while the other one lights up the car license plate.
The
AEK-MOT-TK200G1
evaluation board can be used as a small ECU that meets the typical requirements of a car lift gate.
The board hosts:
•
a Chorus 1M ASIL-B microcontroller (
SPC582B60E1
), which communicates with the multimotor driver (
L99DZ200G
)
through the SPI;
•
an
L99DZ200G
device that controls all the loads connected to the board;
•
a CAN connector that allows a domain controller to interact remotely with the
AEK-MOT-TK200G1
.
Moreover, to support DC motor positioning and increase actuation safety, a circuitry for the current sensing of the
L99DZ200G
H-bridges outputs has been added. On the board, this circuit is coupled by two connectors dedicated to Hall sensor feedback
coming from the motors. These two features can be combined or used alternatively.
To achieve a higher level of safety, a service key mechanism is provided. This mechanism consists of a continuous
communication interaction between the MCU and the
L99DZ200G
chip. This safety feature is concurrent with all the other
communications between the MCU and the
L99DZ200G
.
For a proper management of the
L99DZ200G
, the service key mechanism must be satisfied within a configurable temporal
window. When the service key fails, the
L99DZ200G
switches off all the outputs and enters the fail-safe mode. The service key
temporal window can be configured in real-time, too.
Warning:
The
AEK-MOT-TK200G1
evaluation board has not to be used in a vehicle as it is designed for R&D
laboratory use only.
Figure 1.
AEK-MOT-TK200G1 evaluation board
Getting started with the AEK-MOT-TK200G1 evaluation board for car opening/
closing systems
UM2995
User manual
UM2995
-
Rev 1
-
May 2022
For further information contact your local STMicroelectronics sales office.
www.st.com
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