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Home > News > Company News > ON Semi launches USB Type-C au.....

ON Semi launches USB Type-C audio switch and current sense amplifiers

  • Author:Ella Cai
  • Release on:2018-07-24
ON Semiconductor has launched a USB Type-C analog audio switch with integrated protection, and the NCS21x series of current sense amplifiers.

TheUSB Type-C port multimedia switch, designated FSA4480, supports analog audio headsets allowing a common USB Type-C port to pass USB2.0 signals, analog audio and analog microphone signals.

The device, which supports an audio sense path, is a fully integrated and optimised solution that eases design-in and minimises overall solution footprint.

It includes integrated high voltage protection up to 20 volts (V) DC, and 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 node pins and the unplugging of any audio device is automatically detected.

With its integrated I2C interface, the FSA4480 is controlled by a host processor and audio ‘pop and click’ is highly reduced as the change is made.

Housed in a WLCSP chipscale package measuring 2.24 mm x 2.28 mm x 0.5 mm, the device is suitable for space-constrained mobile applications such as smartphones, tablets, digital cameras and speakers. It can also be utilised in computing devices including laptops, desktops and hybrid notebooks.

The NCS21x family of bi-directional current sense amplifiers which include integrated, highly matched precision resistors, that offer an accurate, compact system design for measuring small differential voltages.

The devices are able to detect common mode voltages in the range -0.3 to 26 V, making them ideal 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 significantly improves efficiency and makes them ideal for power conscious, battery-powered applications.

The 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.