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EKM002 - Power Supply HAT for Raspberry Pi 5

Part.no: 41022175 hero This expansion board will supply power to Raspberry Pi (3, 4, 5) using any regulated DC power supply between 6 and 32V (12 - 24V recommended).

No configuration is required for regular use. To enable maximum power output from the USB-ports, a simple change is required in config.txt.

The board comes fully assembled with hardware included for mounting it to the Raspberry Pi board.

Included hardware

  • 4x 15mm M2.5 spacers
  • 8x M2.5 screws
  • 1x 40-pin riser header

First use requires the user to plug the riser header into the 40-pin connector on the Power Supply HAT and attach the spacers using the included screws.

Functions

  • Supplies power to most Raspberry Pi's from a wide voltage range
  • High efficiency switching design
  • Ready to use. No soldering required!
  • Expansion headers for serial interfaces
  • Well ventilated design. Works with Raspberry Pi Active Cooler

Specifications

  • Supply voltage: 6 - 32VDC
  • Output voltage: 5.1V
  • Efficency: Up to 92%
  • Maximum current output: 5A
  • Quiescent current: <50µA
  • Onboard connectors: I2C, UART, 2x SPI, 5 V ut, GPIO, QWIIC

Connections

Power input

pinout-input

The Power Pi V can be supplied with a regulated DC voltage between 6 and 32VDC using either the mounted, pluggable terminal block OR via the pads located immediately to the left. The pads and the terminal block are connected directly and must not be fed from different sources simultaneously. It is possible to use the additional pads as a way to splice the incoming power for powering other peripherals using the same power supply. The pads feature two different sets of holes, 2.54mm and 3.5mm pitch, that will accomodate most screw terminals, pin headers or by soldering wires directly to the board.

Please note that the markings on Rev 01 (4-40VDC) is the maximum allowed voltage range for the onboard regulator. Supplying the board with higher voltages will result in damage. Recommended voltage range is 6 - 32VDC. The board is designed for use with 12, 15 or 24VDC power supplies. The onboard regulator is a step-down (buck) only and will not convert a lower voltage to a higher. The lowest possible voltage for powering a Raspberry Pi therefore is 6VDC.

The mounted pluggable connector (pn. WAGO 2060-452) is intended for permanent installations. The locking tabs are only rated for a limited number of uses! Single-core wires and other relatively stiff cables can be plugged in without tools. For more flexible and multi-stranded wires, the locking tab must be depressed in order to fit the wires without kinks. The connector works with wire gauge from 0.2mm² to 0.75mm² (AWG24 to AWG18). Recommended strip length 7 - 9mm.

The input is protected against reversed polarity and will withstand the rated voltage for any length of time.

Power output

pinout-output

These pads have the same pitch and will work with the same connectors as the power input. These pads are not used in most cases.

The output is connected to the same net as the 5V supplied to the Raspberry Pi and can be used as an easy way to connect some peripheral device.

Maximum current draw is limited by the maximum current from the regulator (5A) minus whatever current the Pi draws (which varies depending on use).

The regulated 5V output is protected against reversed polarity and back-feed, which allows the Raspberry Pi to be supplied via USB-C and the Power Pi HAT simultaneously.


I2C / UART header pinout

pinout-uart 

    GND ->  GND
    3V3 ->  3.3V regulated output from Pi (~50mA max)
    SDA ->  I2C data (GPIO2, Pin 3)
    SCL ->  I2C clock (GPIO3, Pin 4)
    TX  ->  UART Transmit (GPIO14, Pin 8)
    RX  ->  UART Receive (GPIO15, Pin 10)

SPI header pinout

pinout-spi 

GND ->  GND
3V3 ->  3.3V regulated output from Pi (~50mA max)
SDO ->  SPI MOSI (GPIO10, Pin 19)
SDI ->  SPI MISO (GPIO9, Pin 21)
SCK ->  SPI Clock (GPIO11, Pin 23)
CS0 ->  SPI Chip Select 0, active low (GPIO 8, Pin 24)
CS1 ->  SPI Chip Select 1, active low (GPIO 7, Pin 26)

QWIIC pinout

pinout-qwiic 

GND ->  GND
3V3 ->  3.3V regulated output from Pi (~50mA max)
SDA ->  I2C data (GPIO2, Pin 3)
SCL ->  I2C clock (GPIO3, Pin 4)

Software configuration

When powering a Raspberry Pi from the GPIO header, a small change in config.txt must be made.
The following change will enable maximum current from USB ports and remove the warning at boot:

1: Locate and open "/boot/firmware/config.txt" in a text editor

2: Add the following lines: 

  PSU_MAX_CURRENT=5000
  usb_max_current_enable=1
3: Save the file and reboot

The first line will tell the OS that the power supply is capable of supplying 5A current.

The second line will enable more current to be drawn from the USB ports.

Mechanical dimensions

dimensional-drawing

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