Playing host: DFP controller monitors USB devices

20th January 2016
Mick Elliott

The TPS25810 USB Type-C downstream-facing port (DFP) controller from Texas Instruments (TI) is now being shipped by distributor Mouser Electronics. The highly integrated TPS25810 controller provides all the functionality necessary to support a USB Type-C DFP (host) in a system that does not have USB Power Delivery (PD) source capabilities.

The controller is ideal for systems such as a USB Type-C host port in notebook computers for sleep charging, LCD monitor/docking station and charging cradles, and USB Type-C wall chargers.

It monitors the two configuration channel (CC) pins to determine when a USB device is attached as well as the device orientation. The controller also identifies when Type-C audio or debug accessories are attached. The TPS25810 integrates a 3A, 34-mOhm power switch, which has two selectable fixed current limits (1.5A or 3A) that align with the Type-C current levels.

It applies power to VBUS when it detects an upstream-facing port (UFP), and applies power to VCONN when it detects a powered cable.

The controller also offers overcurrent or over-temperature protection, as well as power management to multiple high-current Type-C ports when all ports cannot simultaneously provide high current.

The TPS25810 draws less than 0.7µA (typical) when no device is attached. The controller offers additional system power savings in low-power states (S4/S5) by running from an auxiliary supply (AUX) which can lower the supply voltage from 5.5V to 3.3V.

The controller is supported by the TPS25810EVM-745 Evaluation Module, which contains inputs and outputs as well as several test points and jumpers for easy configuration and evaluation of the TPS25810 features.

Featured products

Upcoming Events

View all events
Latest global electronics news