SLLA646 August   2024 ISO6520 , ISO6521

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Where are Digital Isolators Commonly Used?
    2. 1.2 What is Functional Isolation?
    3. 1.3 Key Benefits of Functional Isolation
  5. 2Application Use Cases
    1. 2.1 Telecom Power Supplies
      1. 2.1.1 48V Isolated DC-DC
      2. 2.1.2 48V Non-Isolated DC-DC
    2. 2.2 Server Power Supply
      1. 2.2.1 Totem-Pole Power Factor Correction Stage
      2. 2.2.2 Half-Bridge LLC Stage
    3. 2.3 AC - DC Power Supply in Pluggable Wall-Chargers
      1. 2.3.1 Introduction
      2. 2.3.2 Topology Details
      3. 2.3.3 Using ISO65xx for Reliable PWM Signaling
    4. 2.4 Semiconductor Test and Measurement
  6. 3Conclusion
  7. 4References

2.1 Telecom Power Supplies

An uptick in investments towards Telecom infrastructure is being observed due to increase in demand for mobile data. This includes 5G and 6G infrastructure rollout that requires efficient, light, compact designs.

Historically, standard bus voltages Telecom equipment is -48V, generally derived from mains or battery backup. From a system perspective, -48V battery intrinsically increases system longevity by minimizing battery corrosion.

Most of the subsequent circuitry, however, is powered off a positive rail. Therefore, an isolated and a non-isolated DC-DC power stage becomes critical in telecom-power supply systems.