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Microcontrollers for Water Heaters

Water heaters are broadly categorized into gas, electric and solar-powered heaters. Hot water is circulated to bathrooms and floor heating systems. The water is adjusted to a temperature specified via a remote controller (PLC communication) by mixing hot and cold water at a mixing valve. Many manufacturers now offer water heaters that use an energy-efficient electric heat pump called EcoCute.

 Note: PLC: Power-Line-Communication

The Basic Concept of The Product

5V Microcontrollers for General Applications (with Multi-purpose Timers)
The microcontroller contains multiple AD converters that achieve high-speed conversion to handle data from various sensors to measure water volume and temperature, and to detect fire. Toshiba offer microcontrollers with 5V operation (M370, M380 Group(Note)) for controlling a pump motor and a fan motor, incorporating multi-purpose timers that can control the temperature of a heater without increasing the CPU load.
5V 8-bit Microcontrollers for General Applications
Cutting-edge flash technology (NANO FLASH™) is employed in the 8-bit microcontroller to realize high-speed and low-power consumption. A microcontroller built in a remote controller controls a display panel, sound ICs and communication ICs. Since microcontrollers used for water heaters need to be highly reliable, we have 5V microcontrollers featuring a high level of noise tolerance, to prevent malfunctions caused by lightning or noises from devices such as a motor and a switch.

Note: Arm® Cortex®-M3 Microcontrollers : TX03 Series

* Arm and Cortex are registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

* All other company names, product names, and service names mentioned herein may be trademarks of their respective companies.

System Block Diagram

System Block of Microcontrollers for Water Heaters Go to Microcontroller Lineup for Main ControlGo to Microcontroller Lineup for Heat Pump ControlGo to Microcontroller Lineup for Remote ControlGo to Microcontroller Lineup for Remote Control

Features

Features of Microcontrollers for Water Heaters Main ContorlHeat Pump ControlRemote Controller

Main Control

  • Sensor A/D converter
  • Serial I/O for communications with heat pump
  • I/O for various actuator control

Heat Pump Control

  • Sensor A/D converter
  • Vector engine
  • Programmable motor driver
  • Serial I/O for communications with hot-water tank

Remote Controller

Recommended products >> TMP89FW20A / TMP89FW24A

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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.