Introduction

Power Management HAT(B) is a Raspberry Pi power management control board, which can provide a set of extremely powerful power management for Raspberry Pi, such as timing switches, measuring working voltage and current, etc. The load transient response function enables fast switching among multiple power supplies.

Feature

• Onboard MCU (RP2040), powerful and easy to use
• Onboard PCF8523 RTC chip, provides precise RTC information
• Onboard MP28167-A buck-boost DC chip for fast load transient response
• Protection circuits such as power supply anti-reverse, counter-current proof, etc. ensure stable and safe operating
• Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
• Onboard user-defined button, can be used for Raspberry Pi start-up, safe shutdown, or other customized function
• It can detect the input power supply voltage and the working current, and it can be programmed to cut off the power supply immediately to ensure the working life of the lithium battery.
• Voltage/current monitoring circuit, monitors the Raspberry Pi operating voltage and current in real-time

Parameters

• Main chip: RP2040
• Communication interface: UART + GPIO
• Download interface: USB + SWD(Debug)
• Baud rate: default 115200bps (configurable)
• Power supply: USB/PH2.0 connector
• USB port voltage: 5V
• PH2.0 connector voltage: 3.3-4.2V (3.7V Li battery)
• Built-in circuits: battery anti-reverse, counter current proof, voltage/current monitoring
• Dimensions: 56.5mm x 65mm
• Fixed hole diameter: 3.0mm

Hardware Connection

User Guide

Precautions

Working Principle & Demo

GPIO Protocol (Configurable Protocol)

• Based on software compilation, this protocol requires RP2040 and Raspberry Pi to run the demo.
• As the GPIO headers of RP2040 and Raspberry Pi are connected, the running state of Raspberry Pi can be detected and its shutdown can be prompted.=Working With Raspberry Pi=

Configure Pico Compile Environment

1. Download the installation script.

   cd ~
   wget https://raw.githubusercontent.com/raspberrypi/pico-setup/master/pico_setup.sh
   

2. Give run permission and run:

   chmod +x pico_setup.sh
   ./pico_setup.sh
   

3. Restart the Raspberry Pi:

   sudo reboot
   

openocd

• Power Management HAT(B) has connected SWD (debug) to the Raspberry Pi interface, you can directly use the debug interface to download programs or debug.

1. Download the library source code required for OpenOCD

   cd ~/pico
   sudo apt install automake autoconf build-essential texinfo libtool libftdi-dev libusb-1.0-0-
   dev
   

2. Download the OpenOCD source code.

   git clone https://github.com/raspberrypi/openocd.git --recursive --branch rp2040 --depth=1
   

3. Compile and install:

   cd openocd
   ./bootstrap
   ./configure --enable-ftdi --enable-sysfsgpio --enable-bcm2835gpio
   make -j3
   sudo make install

Document

• Power_Management_Hat_(B).pdf

Demo

• Power-example.7z

Datasheet

• Rp2040 datasheet.pdf
• Ina219.pdf
• PCF85063A.pdf
• MP28167GQ-A.pdf

To：

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