Renesas Electronics Ventilator System
Renesas Electronics Ventilator System is a reference design to provide a portable ventilator used in hallway or non-ICU use cases. This design 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 demand for ventilators is so high that 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.
The Renesas Electronics Ventilator System uses the FS1023 flow sensor to 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 controlled by the MCU manages the oxygen ratio. The pressure control mode allows a certain pressure to the patient with each inhale. There is one proximal air pressure sensor connected to the mask that monitors inhale pressure, sending that data to the RX23W MCU. Additionally, the RX23T MCU manages the motor control board that is driven by the blower. The blower provides pressure and blows air into the system. The RX23T MCU communicates using I2C to the RX23W. The system is using two MCUs for higher safety, so these devices can monitor and reset each other. A humidifier is added to the system to supply moist gas to the patient.
Features
- Secure system using two MCUs to monitor each other
- System available for assist control mode and pressure control mode
- Hardware is capable of providing low tidal volume, peak pressure, disconnect, and apnea alarms
- Both gas volume and flow rate are monitored by the FS1023
- The oxygen ratio is controlled by the valve, which is controlled by the MCU, and monitored by the flow sensor
- The exhale pressure is controlled by MCU through the exhale valve
- The oxygen sensor is used to test FiO2 (fraction of inspired oxygen)
- The blower is controlled via pressure/flow sensor feedback
- The LCD brightness is controlled by the light sensor monitoring ambient light
- Features a battery balance monitor to extend battery lifetime
FEATURED PRODUCTS
Renesas Electronics RX23W 32-bit Microcontrollers
32-bit RXv2 core microcontroller with integrated wireless BLUETOOTH® 5.0 (BT5) connectivity.
Renesas Electronics ISL85410 1A Buck Regulators
Synchronous buck regulator featuring an input range of 3V to 36V.
Renesas Electronics ISL94202 Li-ion Battery Pack Monitor
Charge/discharge path Li-ion battery monitor IC that supports from 3 to 8 series connected cells.
Renesas Electronics 4-Switch Synchronous Buck-Boost Controllers
Feature peak and average current sensing and monitoring at both ends.
Renesas Electronics HIP2103 & HIP2104 Half-Bridge Drivers
Designed for applications using DC motors, three-phase brushless DC motors, or other similar loads.
Renesas Electronics ISL28191 & ISL28291 Operational Amplifiers
Offer ultra-low noise and low distortion rail-to-rail output, in a tiny size.
Renesas Electronics ISL80410 Linear Regulators
Offers high voltage, adjustable VOUT, and low quiescent current for always on applications.
Renesas Electronics RX23T 40MHz 32-bit RX MCUs
Allows easy programming in complex inverter control algorithms with the built-in FPU.
SYSTEM BLOCK DIAGRAM
