RENESAS CONFIDENTIAL

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VENTILATOR SYSTEM: OVERVIEW

The Covid-19 pandemic is has created havoc globally, putting more and more people in the hospitals. The demand of for ventilators is so

high that our doctors are creating makeshift ventilators to meet the demand. Many companies are contributing to the cause in various

ways, including opening up their IPs. Renesas is also helping this global cause, by designing ready-to-assemble electronic boards for

ventilators. This is a ventilator system reference design to provide a portable ventilator used in hallway or non-ICU use cases. This

machine can provide high pressure oxygen to patients in assist control and pressure control modes. The assist control mode provides a

certain tidal volume of gas to a patient with each inhale. The flow sensor (FS1023) would monitor the gas flow rate at the inhale tube and

the tidal volume would be calculated by the MCU using the rate integrated with time. The Oxygen valve would be controlled by the MCU

and manage the oxygen ratio. The pressure control mode provides a certain pressure to the patient with each inhale There is one proximal

air pressure sensor connected to the mask to monitor the inhale pressure and send that information to the RX23W. The blower, which

provides pressure and blows air into the system, is driven by a motor control board controlled by the RX23T MCU and it uses I

communication with the RX23W. To provide moist gas to patient, a humidifier is added to the system

The system is using two MCUs for higher safety, so these devices can monitor and reset each other.