EMC Oriented ISR Design

EMC Oriented ISR Design

van der Heijden, Wouter (TU Delft Electrical Engineering, Mathematics and Computer Science)

Verhoeven, C.J.M. (mentor)
Raiteri, Daniele (mentor)
van Dongen, Marijn (mentor)

Delft University of Technology

Electrical Engineering | Microelectronics

2017-10-03

Electromagnetic Compatibility (EMC) is a growing issue in the automotive industry. Integrated Circuits (IC's) must adhere to strict Electromagnetic Emission (EME) and Electromagnetic Susceptibility (EMS) regulations to ensure safety in the automotive vehicle. The Internal Supply Regulator (ISR) plays a critical role in the EMC performance of an IC.

In this thesis, four types of linear regulator topologies are defined, based on the output stage: NMOS series, PMOS series, NMOS shunt, and PMOS shunt. Several important parameters are defined to describe the performance of a regulator. These are used to compare the four topologies. Only shunt regulators were found able to have good performance in both emission and Power Supply Rejection (PSR). Unfortunately, they come with some disadvantages, especially in power efficiency.

A dual loop concept is proposed in order to alleviate these disadvantages. The concept is analyzed on system level and specifications are determined for the system blocks. The system blocks were then implemented on circuit level. Simulations have been performed on each system block. They confirm an improvement in terms of emission and PSR compared to the ISR that is currently used within NXP. Especially the performance in emission shows great improvement; The attenuation for all frequencies in the band of
interest is approximately 30dB. A power efficiency that is only slightly larger than the series topologies has been achieved.

EMC
LDO
ISR
Dual loop
adaptive biasing

http://resolver.tudelft.nl/uuid:1a293ace-400d-4e79-a294-d5e907cce477

2020-10-05

Student theses

master thesis

© 2017 Wouter van der Heijden