Pololu TPS2116 Power Multiplexer Carrier with USB Type-C Connector (non-USB priority)

The TPS2116 Power Multiplexer Carrier offers efficient power management by allowing seamless switching between two power sources with voltages ranging from 1.6 V to 5.5 V and a current capacity of up to 2.5 A. It features an adjustable switching threshold that minimizes output voltage droop during transitions. The internal MOSFET switch design eliminates the voltage drop commonly associated with diode-based power switching, ensuring efficient performance. The board is user-friendly, with 2.54 mm-spaced pins compatible with standard solderless breadboards, and includes a USB Type-C connector for easy integration of a USB power source.

This versatile multiplexer is perfect for applications requiring automatic power source selection, such as devices that switch between USB and external power supplies. The board can be set to prioritize one power source over the other, based on the configuration of the MODE and PR1 pins. For example, in priority mode, the non-USB power source (VIN1) is preferred, making it ideal for projects where a stable external power source should take precedence over USB power.

The carrier's design makes it suitable for a range of projects, from simple DIY electronics to more complex systems requiring reliable power management. Its ability to handle up to 2.5 A of continuous current makes it a robust choice for high-power applications. The board's compact form factor and mounting holes also make it easy to incorporate into various setups.

Incorporating the TPS2116 into a project is straightforward, with a clear pinout and the option to manually control power source selection. The board's MODE and PR1 pins offer flexibility in switching behavior, allowing users to fine-tune their power management needs. For instance, connecting a resistor to PR1 can set a specific switching threshold, enabling precise control over power source transitions.

When using the board without USB, simply connect your power sources to VIN1 and VIN2, ensuring that the load does not exceed 2.5 A. For USB applications, the board's Type-C connector provides an easy way to integrate USB power, with VIN2 tied to the USB VBUS line. This setup allows for seamless power switching between USB and an external source, with the external source as the preferred power supply in priority mode.

To ensure optimal performance, especially when dealing with higher currents or longer power leads, it is advisable to add additional capacitance to the input lines. This helps prevent voltage spikes that could damage the TPS2116. Moreover, adding extra capacitance on the output can mitigate voltage drops during power source transitions, ensuring a stable output voltage.