The work presents a single-chip integrated rotor coil driver (RCD) that can be used in automotive alternators. It integrates the power switch with the control circuitry and the diagnostics; with respect to the state of the art, new functionalities are integrated such as full reverse polarity protection and programmable output slope control against in-rush currents and current spike transients. The paper will discuss the driver IC design from the choice of the architecture to the real silicon implementation. The proposed innovative RCD has been implemented in a 0.35 μm HV-CMOS technology and has been embedded in a mechatronic brush-holder regulator system-on-chip for an automotive alternator. The simulation results and experimental measurements prove the effectiveness of the proposed RCD facing the harshest automotive conditions.
This letter presents a smart driver for LEDs, particularly for automotive lighting applications, which avoid ringing and overshoot phenomena. To this aim, advanced Soft Start and Current Slope Control techniques are integrated on-chip. This letter discusses the driver design integrating in high voltage CMOS technology, the digital circuitry for programming and electronic control units interfacing, and the power devices up to 10 W. Experimental characterizations with LEDs of different power levels and with different types of connections are showed. The smart driver sustains automotive temperature and voltage requirements; moreover it has high power efficiency, it is programmable, and can be configured to work as a linear regulator (for low current LEDs) or in switch mode (for higher power LEDs)
Abstract-In this paper, a proposed methodology to identify the substrate coupling effects in smart power integrated circuits is presented. This methodology is based on a tool called AUTOMICS to extract substrate parasitic network. This network comprises diodes and resistors that are able to maintain the continuity of minority carrier concentration. The contribution of minority carriers in the substrate noise is significant in high-voltage and high temperature applications. The proposed methodology along with conventional latch-up problem identification for a test case automotive chip AUTOCHIP1 are presented. The time of the proposed methodology is significantly shorter than the conventional one. The proposed methodology could significantly shorten the time-to-market and ameliorate the robustness of the design.
This work aims to present an High Voltage High Power and High Frequency CMOS DC-DC converter able to work in both Flyback and Boost configurations, designed for automotive applications. The system, implemented in Austriamicrosystems 0.35um HVCMOS technology, is able to manage input voltages from 2.5V up to 36V and generates a programmable output voltage from 6 to 36V with an output current up to 900mA. To improve EMC/EMI system performances, dithering of switching frequency and slope controlling of the gate driver have been implemented.
The paper addresses the problem of inductive load drivers for automotive applications. The design integrates single-chip in a 0.35 μm low-cost HVMOS technology both the digital circuitry for control and communication with SPI/CAN vehicle networks and the multi-channel drivers optimized for inductive loads. To face ISO26262 requirements also a diagnostic block is embedded. As proved by experimental measurements on fabricated test-chip each channel can sustain up to 650 mA DC current, 1.1 A pulsed current with clamped energy up to 100 mJ, being compliant with automotive harsh operating conditions of ESD up to 4 kV and temperature range from −40 to 150 °C
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