USB BC1.2 charging detector simplifies Type-C host and client designs

November 26, 2019 //By Nick Flaherty
The PI3USB9201 from Diodes enables designers to reduce the size and cost of adding a USB Type-C interface into laptops, tablets, smartphones, drones, and small home appliances.
The PI3USB9201 from Diodes enables designers to reduce the size and cost of adding a USB Type-C interface into laptops, tablets, smartphones, drones, and small home appliances.

Diodes Incorporated has launched a dual-role USB BC 1.2 battery charging detector, which incorporates both host and client circuitry in USB Type-C designs.

The PI3USB9201 enables designers to reduce the size and cost of adding a USB Type-C interface into laptops, tablets, smartphones, drones, and small home appliances.

Unlike current market solutions that require devices dedicated to either host or client mode, the PI3USB9201 enables developers to fully support the reversible and bidirectional flexibility of the USB Type-C interface with a single chip.

The PI3USB9201 reports detection results to the system via a 1MHz I2C interface. Four-pin selectable slave addresses help avoid bus conflict.

When configured as a host, the PI3USB9201 broadcasts the device status as standard downstream port (SDP), charging downstream port (CDP), or dedicated charging port (DCP) via the USB D+/D- pins, in accordance with BC 1.2. As a client, the PI3USB9201 monitors the D+/D- pins to detect the attached host type.

Differential pass-through USB switches allow the PI3USB9201 to support USB switch pass-through in host mode for system wakeup via mouse or keyboard. The chip also has a wide supply-voltage range of 2.7V to 5.5V, ensuring dependable operation in battery-powered equipment and energy-saving sub-1µA current in shutdown mode.

The PI3USB9201 is in production now in the 2mm x 2mm 12-pin QFN package. Pricing starts at $0.60 each in 3000 piece quantities.

www.diodes.com


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