For more details please read our User Manual
The Lite DCDC System Basis Chip Shield with TLE9471-3ES for Arduino is based the new Infineon Lite SBC. The device is designed for various CAN automotive applications as main supply for the microcontroller and as interface for a CAN bus network including the CAN Partial Networking feature. To support these applications, the System Basis Chip (SBC) provides the main functions, such as a 5 V lowdropout voltage regulator (Buck SMPS) for e.g. a microcontroller supply, another 5 V low-dropout voltage regulator with off-board protection for e.g. sensor supply, a HS-CAN transceiver supporting CAN FD and CAN Partial Networking (incl. FD tolerant mode) for data transmission, a high-voltage GPIO with embedded protective functions and a 16-bit Serial Peripheral Interface (SPI) to control and monitor the device. Also implemented are a configurable timeout / window watchdog circuit with a reset feature, one Fail Output and an undervoltage reset feature. The device offers low-power modes in order to minimize current consumption on applications that are connected permanently to the battery. A wake-up from the low-power mode is possible via a message on the buses, via the bi-level sensitive monitoring/wake-up input as well as via cyclic wake.
- Supply voltage range 9 to 12 V
- 9 WS2812B LEDs powered by the integrated buck converter of the Lite SBC
- Microchip MCP2515 SPI-CAN protocol handler for CAN communication
- Power mosfets driven by the integrated charge pump of the Lite SBC to switch loads up to 2.5 amps. An external freewheeling diode allows switching of inductive loads
- High voltage level input for wake signalization and/or standard high voltage input
- Switchable 120 Ohm CAN termination
- Switchable SBC test mode and Arduino reset
The WK input has an ESD protection and also a passive pull-down. The easiest way to connect a switch is a switchable connection to the positive input supply rail. But also any signal with a logic high level of over 4 volts can be applied here. The SW output can drive directly a connected load (e.g. light-bulbs, small motors, etc). The load must be externally connected to GND. The GNDs of the other CAN communication nodes and the GND of the shield should be connected together.
Two code examples for the shield are offered
- CAN-PN demonstration
- General code example to demonstrate CAN communication, Control of LEDs, SW output and the WK input
A more detailled description can be found in the Shield User Manual.
All code examples are based on the Lite SBC Microcontroller Library.
The picture shows the shield with an external load of 2.5 amps. The power mosfets on the board heat up to approx. 60 degrees at ambient temperature.
