STDA053 October   2026 DP83TC813R-Q1 , DP83TC813S-Q1 , DP83TC815-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Problem Statement on Current Legacy Parts Communication Topology and Ethernet Advantage
  6. 3The Ethernet Advantage
  7. 4The Critical Hurdle: Power Delivery in the Ethernet Shift
  8. 5The Answer: Power Over Data Line (PoDL)
  9. 6Implementation Challenges and Mitigation
  10. 7Conclusion

1 Introduction

As the automotive industry transitions from Advanced Driver Assistance Systems (ADAS) Level 2+ to fully autonomous Level 3 and 4, the demand for high-resolution imaging radar is required. This evolution necessitates a move away from legacy communication protocols toward automotive Ethernet. However, the shift to high-bandwidth data creates secondary challenges: an increase in the number of radars used in a car and an increase in the power demand per radar, and the resulting physical power loss of wiring.

This article explores how power over data line (PoDL) serves as the critical enabler for the Ethernet to radar transition. By converging power and high-speed data onto a single twisted pair, PoDL addresses the core constraints of modern vehicle design: weight, cost constraints, thermal management, and architectural scalability.