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Thermal Management | Cypress

Block Diagram

Thermal management is a mission-critical function for system reliability. The race to build higher performance systems is fueling the need to dissipate more heat per square inch of board space. The demand for energy efficient products and “always-on” cloud computing systems is driving the need to provide more advanced features such as hardware-based fan control, automatic noise reduction, and predictive fan failure algorithms.

Cypress’s Programmable System-on-Chip (PSoC) is a unique programmable architecture that allows system designers to do more with less. PSoC offers the best-in-class performance - hardware and/or firmware control for up to 16 fans, support for the largest number of analog and digital temperature sensors, thermal zone management algorithms, EEPROM based fault logging and predictive fan failure algorithms - perfect for designing systems to meet ever-increasing reliability standards. PSoC’s ability to integrate disparate analog and digital functions allows all this and more, while lowering your BOM costs.

Design Considerations

Design Challenges

The race to build higher performance systems is posing new challenges to designers.

  1. Mission-critical systems cannot tolerate Thermal Management failures
    • When fans wear out or become blocked, or
    • When SMBus interfaces to the Host Processor go down
  2. Fans create noise and consume significant power at maximum rpm
    • They must be driven at the minimum feasible rpm to minimize noise and power
    • They require a microcontroller running Thermal Algorithms to calculate minimum feasible rpm
  3. Every design requires difficult, time-consuming customization for
    • Different numbers of fans
    • Different types of Temperature Sensors
    • Specialized analog ICs for each Temperature Sensor
    • Microcontroller-based firmware algorithms to correct and linearize sensor outputs

PSoC solves these problems

  • PSoC monitors the fan rpm for failures and supports redundant SMBus interfaces to the Host Processor
  • The PSoC kit includes Thermal Algorithms that run on the PSoC microcontroller to minimize fan noise and power
  • One PSoC can control and monitor up to 16 fans and support up to 32 Temperature Sensors
  • PSoC integrates the specialized analog ICs for each Temperature Sensor, including the expensive ADC and IDAC Components
  • PSoC Temperature Sensor Components and User Modules provide firmware algorithms for accurate sensor conversion
  • PSoC Component and User Module Configuration Tools create customized Thermal Management configurations in minutes

PSoC provides a fail-safe, customized, one-chip Thermal Management subsystem solution

Getting Started

  1. Select the right PSoC for your application (see table below)
    Key Features
    PSoC 5
    PSoC 3
    PSoC 1
    Number of fans that can be controlled
    up to 16
    up to 16
    up to 8
    Number of temperature sensor inputs
    up to 32
    up to 32
    up to 24
    Temperature sensors supported
    Diode, RTD, Thermocouple, Thermistor
    Diode, RTD, Thermocouple, Thermistor
    Diode, RTD, Thermocouple, Thermistor
    ADC based voltage and current monitoring accuracy
    0.26%
    0.26%
    2%
    Redundant SMBus interface
    Yes
    Yes
    Yes
    Support temperature sensors with I2C interfaces
    Yes
    Yes
    Yes
  2. Watch a PSoC Thermal Management Training Video
  3. Download and Install the PSoC Integrated Design Environment
  4. Download the PSoC Thermal Management Application Note
  5. Purchase the PSoC Thermal Management Kit and Prototype the Example Project Design (bundled with kit)
  6. Configure your Design using Thermal Management Components or User Modules (Refer to the Thermal Management Application Note)

Integrate Additional Functions with PSoC

Apart from the standard Thermal Management functionality PSoC enables integration of additional functions. This could enable further BOM integration and cost savings (some examples below)

Power Supervision: AN76474 (PSoC 3 and PSoC 5), AN78646 (PSoC 1)

Temperature Sensing: Temperature Sensing & Control Solution

Miscellaneous Functions: I2C Mux, I2C Expander, I2C Level Translator, I2C Bridge, Reset control logic, MDIO Mux, MDIO Expander, LED Test & Drive, USB-UART Maintenance Ports, SGPIO Backplane & Enclosure Management. Contact your local Sales Representative

Application Notes

Application Note
PSoC 5
PSoC 3
PSoC 1
Thermal Management Solution

Development Kits/Boards

Kit
PSoC 5
PSoC 3
PSoC 1
PSoC Development Kit
PSoC Thermal Management Kit

Application Notes

Development Kits/Boards

Video

  • use for camtasia screencasts

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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.