Analog, mixed-signal

 

Innovative chips til USB-C applikationer

Innovative chips til USB-C applikationer

ON Semiconductor lancerer ny multimedia analog audio switch samt højpræcions current sense forstærker til USB-C applikationer (in english).

ON Semiconductor has announced two new products that can be used together in USB-C (Type-C) applications while offering benefits in other modern power-oriented applications. The new devices are the FSA4480, a USB Type-C analog audio switch with integrated protection, and the NCS21x series of current sense amplifiers.

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 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 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 ideally suited to 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 and low offset drift. 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.

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 noted presence in the power management, motor control and signal conditioning blocks.

7/8 2018
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