AndiceLabs:PowerCape

Description
The Power Cape provides flexible power supply and control options by combining a lithium battery charging circuit with a buck/boost regulator. If DC power is insufficient or unavailable, the BeagleBone will be supplied by the lithium battery. When sufficient DC power is available, the battery will be charged to 4.2V whether the system is on or not. The cape also has an INA219 power monitor on the battery input so that voltage and charge/discharge rates can be monitored by software.

The on-board AVR microcontroller acts as a "power supervisor" and provides system power on user-definable events (DC power good, timeout, external signal, or cape button press). The AVR's firmware is field-upgradeable over the I2C bus. Additional functionality such as real-time clock (RTC) and watchdog functions are also provided by the power supervisor.

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

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

Vendors

 * AndiceLabs

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