onsemi Medical Ventilator Solution

The block diagram provides a targeted list of relevant onsemi devices and provides an overall understanding of the solution.

Complexity can differ greatly but common variables in a medical ventilator system are:

• The measurement of oxygen the ventilator is delivering during inspiration (or phase)
• Respiration rate per minute 
• Tidal volume, which is the volume of each breath delivered
• Sensitivity, or how much inspiratory or trigger effort is required from the ventilator to recognize a patient's attempt at inhalation. A trigger would prevent a ‘mechanical breath’, or a breath initiated by the ventilator
• Peak flow, or the flow of breaths

onsemi's team of experts has worked diligently to provide a high-level system architecture for medical ventilators. Let’s dive into the many capabilities our components can offer these life-saving devices.

The architecture shown above is able to control one high-performance BLDC Air Pump (or more with the multiples of the same BLDC drivers), which is the "heart" of every medical ventilator. Each valve drive module implemented into the end customer application device can drive up to six valves simultaneously, even if only three valve types are displayed in the customer's proposal. 

Design resources