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HVAC | Cypress Semiconductor

Block Diagram

Design Considerations

Typical HVAC systems consist of a series ASICs or MCUs which control several brushless DC motors, fans, AC compressor, and heating coils. Additionally, semi and fully-automatic HVAC systems will integrate system/user-interface and graphical display as well as temperature and humidity sensing.

PSoC 3 provides a very versatile HVAC solution. Integrated user-interface, motor control, precision analog sensing, and communication make PSoC 3 the ideal platform.

 •  Industry leading CapSense technology to create a sleek user interface
 •  Highly configurable analog and digital resources allow for flexible motor control over a wide range of configurations
 •  Eliminate costly Hall-Effect sensors and reduce mechanical/electrical complexity
 •  Full CAN 2.0A/B to integrate the system with the entire automotive electronic ecosystem
 •  LIN 2.0 to create local networks for other nodes

Application Notes

  • This application note introduces the basic concepts of CAN (Controller Area Network) and demonstrates how CAN bus communication is implemented using PSoC® 3 and PSoC 5LP.

  • AN58304 provides an overview of the analog routing matrix in PSoC® 3 and PSoC 5LP. This matrix is used to interconnect analog blocks and GPIO pins. A good understanding of the analog routing and pin connections can help the designer make selections to achieve the best possible analog performance. Topics such as LCD and CapSense routing are not covered in this application note.

  • AN58827 discusses how internal trace and switch resistance can affect the performance of a design and how these issues can be avoided by understanding a few basic details about the PSoC® 3 and PSoC 5LP internal analog architecture.

  • The special input/output (SIO) pins provide differential input buffer and a means to regulate the high-level output voltage (VOH). The SIO pins are tolerant to input voltages higher than the I/O supply voltage and can sink up to 25 mA current. This application note explains the following applications of SIO pins: comparator, charge pump, Salen-key filter, level shifter, half wave rectifier, peak detector, and sleep wakeup using SIO comparator.

Development Kits/Boards

  • The CY8CKIT-001 PSoC® Development Kit (DVK) provides a common development platform where you can prototype and evaluate different solutions using any one of the PSoC 1, PSoC 3, PSoC 4, or PSoC 5 architectures.

  • The CY8CKIT-017 CAN/LIN Expansion Board Kit (EBK) is an expansion board that is used with the CY8CKIT-001 PSoC® Development Kit (DVK) or the CY8CKIT-030 PSoC 3 Development Kit (DVK).

  • The CY8CKIT-029 PSoC® LCD Segment Drive Expansion Board Kit allows you to evaluate PSoC's LCD drive capability using LCD segment component in Cypress's PSoC Creator™.

Software and Drivers

  • PSoC Creator

    PSoC Creator is a state-of-the-art software development IDE combined with a revolutionary graphical design editor to form a uniquely powerful hardware/software co-design environment.

  • PSoC Designer

    PSoC Designer is the revolutionary Integrated Design Environment (IDE) that you can use to customize PSoC to meet your specific application requirements. PSoC Designer software accelerates system bring-up and time-to-market.