STMicroelectronics AEK-POW-PDUMINI PDU Board

STMicroelectronics AEK-POW-PDUMINI Power Distribution Unit (PDU) Board manages low-voltage power distribution in vehicles by consolidating connections and protecting circuits in a compact design. This board supports 12V and 48V systems and replaces traditional fuses with eFuses. The AEK-POW-PDUMINI board acts as a secondary power distribution unit positioned closer to the loads, reducing overall wiring length within the zone control unit. This board serves as a building block for complex primary PDUs. The AEK-POW-PDUMINI board includes a Power Rail Switch unit (PRS), connecting multiple power sources. This board features two power supplies (5V and 3.3V), provided by a DC-DC converter for higher current capability. The AEK-POW-PDUMINI board is ideal for smart power distribution.

Features

Compact and MCU-controllable Power Distribution Unit (PDU) dedicated to 12V board net
E-fuse-protected high-side drivers with current capability from 5A to 27A are present:
- A pair of 2-channel VNF9D1M5Q, featuring 27A per channel
- A 2-channel VNF9D5SF, featuring 13A per channel
- A 4-channel VNF9Q20SF, featuring 5 A per channel
Advanced system standby features are achievable by switching off main STi2Fuse channels and delegating the remaining standby supply to the eight companion P-channels with 400 mA capability belonging to the smart and SPI-controllable L99SP08 dedicated IC
All the devices on the board are SPI-controlled by an MCU linked by the automotive unified connector, a standardized 96-pin plug-and-play connector present on the board featuring MCU peripheral and supply pins
For improved standby performance, the MCU can be switched off during PDU parking mode condition, delegating the channel control to the L99SP08 and the wake-up features of the on-board SPSB081 PMIC, featuring, in addition, a CAN-FD physical layer for wake-up from CAN
The board has a dedicated channel for MCU supply via the automotive unified connector managed by a VN7140AJ high-side driver and useful to power the MCU board from 12V (V_BAT) after a wake-up condition

To facilitate the debug, a set of disconnectable status LEDs is present on the board. The same LEDs can be disconnected by removing dedicated resistors when measuring the advanced standby performances
Emergency pins for rapid switch-off of the output channels in case of critical events in normal operation mode, bypassing SPI control
A dedicated ‘assembly mode’ jumper is present on the board to simulate the assembly mode of the PDU in the car maker factory
The typical MCU companion board is the AEK-MCU-C4MLIT3 featuring PDU remote access via CAN-FD or the soon-available AEK-MCU-C4MLIT2 able to implement PDU additional remote access via 100BASETX or 10BASET1S
120mm x 100mm compact size
Included in the AutoDevKit ecosystem