ON Semiconductor offers analog audio switch, current-sense amplifiers for USB-C

The FSA4480 is a high-performance USB Type-C port multimedia switch that supports analog audio headsets allowing a common USB Type-C port to pass USB 2.0 signals, analog audio, and analog microphone signals. The device, which supports an audio sense path, is a fully integrated and optimized solution that eases design-in and minimizes overall solution footprint. It includes integrated high-voltage protection up to 20 VDC, and it offers pinout support for both OMTP and CTIA—sometimes known as American Headset Jack (AHJ)—smartphone headset standards. There is overvoltage protection (OVP) on the common-mode pins, and the unplugging of any audio device is automatically detected.

With its integrated I²C interface, the FSA4480 is easily controlled by a host processor, and audio “pop and click” is highly reduced as the change is made. Housed in a small WLCSP chipscale package measuring just 2.24 mm x 2.28 mm x 0.5 mm, the device is suited to space-constrained mobile applications such as smartphones, tablets, digital cameras, and speakers. It can also be utilized in computing devices including laptops, desktops, and hybrid notebooks.

The NCS21x bidirectional current-sense amplifiers, which include integrated, highly matched precision resistors, offer an accurate, compact system design for measuring small differential voltages. The devices are able to detect common-mode voltages in the range of -0.3 to 26 V, making them suitable for both high-side and low-side current sensing. The zero-drift architecture of the NCS21xR provides a low input offset voltage (as low as 35 µV) and low offset drift (as low as 0.5 µV/°C). Together with integrated gain setting components, these devices are capable of sensing smaller voltage drops across the shunt, providing a higher gain accuracy and superior temperature performance.

Offered in 50/ 100/ 200, and 500/ gain options with a maximum gain error of ±1%, these devices consume a low quiescent current of 40 μA, which improves efficiency and makes them suitable for power conscious, battery-powered applications. The small SC-70 and UQFN packages make them suitable for monitoring charging and discharging current for battery management in handheld applications such as smartphones, tablets, and laptops. With the adoption of USB Type-C in rapid growth markets such as hybrid and electric vehicles and several consumer products, these current-sense amplifiers have presence in the power-management, motor-control, and signal-conditioning blocks.

“Our new multimedia switch and current-sense amplifiers play an important role in managing the USB Type-C interface in modern mobile devices,” said Wiren Perera, who heads IoT at ON Semiconductor. “The highly integrated designs, low-power operation, and small size mean they are ideal for tablets and smartphones where space is limited and power budgets are important. Furthermore, the current-sense amplifiers can be instrumental in controlling power in larger applications including white goods and electric vehicles.”

For more information, visit the company’s USB Type-C landing page.