AndiceLabs:PowerCape

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Description

PowerCape

The Power Cape is an advanced power supply and control cape for the BeagleBone. It combines a dynamic power path manager and lithium battery charger with a buck/boost regulator and power supervisor to enable a variety of operating scenarios. For example, you can power the BeagleBone from the single-cell Lithium battery, a DC power source, or a combination of the two (think solar). You can have the BeagleBone power up on DC power restore, configurable timeout, or an external signal. When the BeagleBone powers off, DC power is cut completely to prevent additional power draw for a lower power "off" state.

In addition to the power supervisor duties, the AVR provides a real-time clock function as well as configurable watchdogs for power-up and power-down of the system. System software can track the battery voltage and current via the INA219 power monitor on the battery interface.

Revision Changes

Revision A0

Initial release of BeagleBone Power Cape

Revision A1

  • Molex connector removed from opto-isolator so that it's not the same as the DC input connector.
  • UART1_TXD and UART1_RXD resistors are de-populated. These signals were tri-stated (available for other capes) on the A0.
  • The cape now has access to the power button (PWR_BUT) and system reset (SYS_RESETn).

Getting Started

Standard setup:

  • An AndiceLabs Power Cape
  • A BeagleBone Black or BeagleBone White
  • A 5V DC power supply (recommended 5V @ 2A)
  • A single-cell (3.7V) LiPo battery

Specifications

Electrical Specifications

DC input voltage 5VDC to 14VDC
Cape supplied power on DC 5V @ 2A to BeagleBone
Cape supplied power on battery 5V @ 1.2A to BeagleBone
Battery charge current 350mA typical
Battery charge timeout 3 hours typical
Battery full voltage 4.2V
System quiescent power draw on DC input 1.2mA typical
System quiescent power draw on battery input 100uA typical
Indicators 2 green LEDs controlled by ATmega328p

Connectors

DC Power Input Molex MicroFit3 connector
Battery Input JST PH (found on AdaFruit and SparkFun LiPo packs)
External Signal Input Right-angle MTA-100 connector

Signal Usage

The BeagleBone Power Cape uses the following signals:

  • DGND
  • VDD_3V3B
  • VDD_5V
  • PWR_BUT (A1 only)
  • SYS_RESETn (A1 only)
  • I2C2_SCL
  • I2C2_SDA

EEPROM

EEPROM Support Yes
Board Name PowerCape
Version 00A1
Manufacturer AndiceLabs
Part Number POWERCAPE-00A1

Documentation

Open Source Partial
System Reference Manual FAQ
Schematics PDF
Firmware GitHub

Vendors

Product Images


To go back to the cape list, please click BeagleBone Capes