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Semiconductors for Ultrasound Slide 20

This portion of the presentation will focus on the different power options that are available for the different solutions. There will be a discussion of the concerns and the different types of products that the customer might be designing and what the power source is going to be. The power will be broken out by the different types of products that are being designed, whether it’s a premium, mid-range, portable or ultra-portable. Beginning with portable, the key concerns are likely to be small size, high efficiency, integration, which translate to small product size, long battery life. The key products to consider are going to be PMICs, otherwise known as PMUs or multi-output DC/DC converters. These DC/DC converters, are switching regulators with integrated FETs. If the device is to be plugged into a wall receptacle, there will be different concerns. High efficiency is still a concern because the user does not want to generate excessive heat or waste power in the system, but they may be focused on the ease of use as well. The types of power products to consider in this instance would be DC/DC controllers with external FETs, which are going to offer high efficiency but provide the flexibility to design the system to the customer’s exact needs. TI also offers DC/DC converters for those, which incorporate the FETs and give the customer easier design and low bit, small design. These PMICs, depending on the types of power rails required, can include linear regulators or LDOs, low dropout regulators. TI also offers power modules which are an off-the-shelf power solution that will allow the customer to purchase the power supply and all that must be done is to add a capacitor on the input and output and a couple additional parts around it. Other concerns the designer may have are the different levels or types of systems which are going to have different noise characteristics or sensitivities. If any of the rails have a low noise requirement, they are going to want to focus on linear regulators or low dropout regulators.

PTM Published on: 2013-04-30