Overview
Medical and laboratory equipment has stricter power requirements than most products: the supply must provide reinforced isolation and low leakage current to protect patients and operators, and it must deliver a low-noise rail for sensitive measurement circuits. Hawun supplies medical-grade and precision supplies that meet those requirements, and BeiLuo supplies them as an authorized Hawun distributor with FAE support for safety and noise design.
Medical Safety Requirements
A medical power supply must provide the isolation and the low leakage that the safety standard requires, and it must come with the documentation that supports the product's safety case. A supply such as the HW-MED-15W-24 provides reinforced isolation and low leakage for patient-contact equipment, in an enclosed package that simplifies integration. Because the requirements are stricter than for a general-purpose supply, the isolation test data and the certification matter as much as the electrical specification, and the layout and the enclosure must respect the creepage and clearance the standard demands.
Leakage and Patient Contact
Leakage current is critical in equipment that touches a patient, because even a small leakage can be hazardous. The supply's isolation and its leakage rating must meet the standard for the application, and the design must keep the leakage low across the conditions the equipment will meet.
Low-Noise Precision Power
A measurement or precision analog system is affected by the noise on its rail, because that noise appears directly in the result. A precision supply such as the HW-PREC-50W-12 combines careful filtering with reinforced isolation to deliver a stable, low-noise rail for laboratory and measurement equipment. Where even the residual noise of a switching supply is too high, a downstream linear regulator provides the final clean rail, and the measurement should be made with the real load and the real layout because both affect the result.
Measuring the Noise
Supply noise should be measured with the real load, using a low-noise probe and a bandwidth that matches the application. A figure measured into a resistive load on the bench can understate the noise the product will see, so the measurement must reflect the real conditions.
Documentation and Compliance
Medical and laboratory products are audited, so the documentation matters. The isolation test data, the safety certification and the compliance documents support the product's safety case, and BeiLuo ships the import, origin and RoHS documents with every order so the paperwork is ready for the audit.
Why BeiLuo
We hold mainstream Hawun medical and precision supplies in regional stock and ship them with import, origin and RoHS documentation. Our engineers support supply selection, isolation and noise design and safety documentation review from concept through production, and we can measure the supply in our lab.
Validating for Medical and Laboratory Use
Before production, measure the isolation, the leakage and the output noise with the real load and the real layout, and confirm the documentation supports the safety case. These measurements decide whether the product is safe and accurate, and they are cheaper to take before the equipment is built than after.
Next Steps
Send your isolation, leakage and noise requirements and we will propose a supply set, confirm availability, and supply samples for validation.