Low Noise Low Ripple Fully Integrated Isolated DCDC Converters for Signal Chain Applications

Project: Research project

Project Details

Description

Low Noise Low Ripple Fully Integrated Isolated DCDC Converters for Signal Chain Applications Low Noise, Low Ripple Fully Integrated Isolated DCDC Converters for Signal Chain Applications Low Noise, Low Ripple Fully Integrated Isolated DCDC Converters for Signal Chain Applications Bertan Bakkaloglu, Sayfe Kiaei / Arizona State University Isolated converters are required to provide electrical isolation between two supply domain systems. Isolation between the power source and the load is required in several applications in order to meet safety specifications, or for protecting an IC that is not rated to operate at a high voltage. As an example, safety specifications such as UL1459 necessitate 500V of isolation for telecom applications1. Isolation must be provided between all the input and output stages of the power converter, including control, ground and analog feedback points. In state of the art isolated power supplies, the power stage isolation is generally achieved by using transformer. Although there are several commercial products utilizing transformer based isolation approaches for high power isolated converter applications, there is an increasing need for fully integrated isolated converters that can interface low power signal chains from very high voltage inputs to ground referenced digital signal processing modes as shown in Figure 1. The goal of this 3 year project is to develop enabling techniques for isolated DC-DC converters for low power integrated applications such as current-shunt monitors, sensors, GaAs, GaN FET drivers, where primary side can be as high as 500V to 1500V, and the voltage across its secondary side should be referenced to a nominal CMOS operating voltages from 1V to 3.5V. The proposed approach would use fully integrated transformers and would not need any external components. Successful outcome of this project will enable direct connection of signal chains and drivers directly to high voltage inputs and interface with low voltage digital processors. Proposed isolated converter topology will enable precise DC voltage level control, while suppressing and spreading noise associated with the switch mode regulation in a high dynamic range mixed signal environment.
StatusFinished
Effective start/end date2/1/137/31/16

Funding

  • SRCCO Inc.: $165,000.00

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