@misc{10481/106109,
year = {2025},
month = {9},
url = {https://hdl.handle.net/10481/106109},
abstract = {This paper presents a novel technique for thermally compensating the power output of a DC-DC converter that supplies automotive lighting/signaling systems with multiple LED branches. The method ensures stable bias voltage for the current drivers controlling each branch, maintaining consistent power consumption across a wide temperature range. This issue has been minimally addressed in existing literature, providing few solutions which are too complex for industrial production. The approach proposed is simple and involves incorporating a temperature-sensitive thermistor into the DC-DC converter’s control loop, enabling the output voltage to adjust with ambient temperature. Different control loop configurations are explored, demonstrating that a simple resistor-thermistor network can approximate the desired voltage response under diverse thermal conditions. The power dissipated in the current drivers is kept within a controlled range, improving system efficiency and reducing heat loss. Additionally, it minimizes the need for additional current drivers, lowering the cost of these systems, improving battery life of the DC-DC converter, and decreasing CO2 emissions. For the case studies analyzed, an optimized configuration with appropriate resistor values and thermistor models achieves a 75% relative reduction in power dissipation by the current driver and a 50% improvement in the relative efficiency of the LED branch system.},
organization = {Valeo-UGR Chair},
organization = {MCIN/AEI/10.13039/501100011033 IJC2020-043307-I},
organization = {“European Union NextGenerationEU/PRTR”},
publisher = {MDPI},
keywords = {Automotive lighting},
keywords = {LED},
keywords = {Temperature},
title = {Dynamic Thermal Voltage Adaptation for LED Branches in Automotive Applications},
doi = {10.3390/s25175392},
author = {Martínez Pérez, José Ramón and Carvajal Rodríguez, Miguel Ángel and Santaella, Juan José and Escobedo Araque, Pablo and López Ruiz, Nuria and Martínez Olmos, Antonio},
}