Synchronizing the Power Outputs in Bias Applications
Application Notes
Introduction
This application brief describes using the voltage output synchronization capabilities of modular power supplies in R&D multiple bias applications.
Description
During R&D and design validation stages, some tests begin with multiple, sequenced voltages to power the device under test (DUT). For example, an ATX PC motherboard requires a specific power-on sequence to power the board. It is important to power the board properly to avoid sub-assemblies drawing excessive current. An incorrect power start-up sequence may cause damage to integrated circuits. In turn, this can compromise the reliability and quality of the circuit board. R&D engineers must generate the correct power-up sequence to the board to prevent harming circuits and causing additional problems.
Design validation engineers sequence multiple voltages to evaluate how much margin exists in their designs. They adjust the timing between the power-on voltages until a problem occurs.