Toshiba Electronic Devices and Storage Corporation

Discrete Thermostat Solution

Toshiba's discrete thermostat improves operating life and increases the functionality and performance of smart home devices

Image of Toshiba's Discrete Thermostat SolutionToshiba's discrete thermostat solution improves operating life and increases the functionality and performance of smart home devices while reducing power consumption and space requirements. Energy efficiency savings, smart controlling, and reduction in per-unit energy costs are a few of the underlining parameters where these devices shine. Toshiba offers products that meet these important requirements and more with their LDO technologies and photo relays, which have garnered success in thermostats and other similar designs.

Power Supply Circuit Block Diagram

Image of Toshiba's Power Circuit Block Diagram

Various power supply voltages are required for thermostat sensors and high-frequency circuits to increase functionality and reduce power consumption. Therefore, it is especially important to choose an LDO regulator for power supply stabilization and voltage conversion. For LDO regulators, TCR3UM and TAR5SB are recommended. Low stand-by current reduces total system power consumption, and overtemperature/overcurrent protection provides stability to avoid unexpected system power events.

Interface Circuit Block Diagram

Image of Toshiba's Interface Circuit Block Diagram

In Europe and North America, central heating and forced air systems are standard. Modern systems for heating, cooling, and ventilation (HVAC) have evolved, and thermostats are an integral part. This system is connected to a motor or something similar, which means that the thermostat is always exposed to the risk of motor noise or abnormality. Isolation from the system is essential to avoid this risk. The photorelays shown below are preferred for such isolation due to low ON-resistance (RON), a wide range of allowable on-current (ION), and are available in small packages designed to shrink the footprint and improve design flexibility.

Resources

Application details

Features
  • Keeps low stand-by current for low-power operation
  • Increases heat dissipation capabilities with efficient packaging
  • Optical coupling over an isolated barrier
  • Application notes, reference designs and other material to help with design
  • Wide portfolio of products

LDO Regulators

ImagemNúmero de peça do fabricanteDescriçãoAvailable QuantityPreçoVer detalhes
IC REG LINEAR 5V 200MA SMVTAR5SB50(TE85L,F)IC REG LINEAR 5V 200MA SMV4500 - Immediate$0.31Ver detalhes

Isolation/Switch (Photorelays)

ImagemNúmero de peça do fabricanteDescriçãoAvailable QuantityPreçoVer detalhes
SSR RELAY SPST-NO 4A 0-60VTLP3107A(TP,FSSR RELAY SPST-NO 4A 0-60V7346 - Immediate$3.43Ver detalhes
SSR RELAY SPST-NO 3A 0-100VTLP3109A(TP,FSSR RELAY SPST-NO 3A 0-100V0 - Immediate$4.07Ver detalhes
SSR RELAY SPST-NO 3A 0-60VTLP3555A(TP1,FSSR RELAY SPST-NO 3A 0-60V26507 - Immediate$2.64Ver detalhes
SSR RELAY SPST-NO 3A 0-100VTLP3823F(TP4,FSSR RELAY SPST-NO 3A 0-100V0 - Immediate$6.80Ver detalhes
SSR RELAY SPST-NO 1.5A 0-200VTLP3825F(TP4,FSSR RELAY SPST-NO 1.5A 0-200V592 - Immediate$6.80Ver detalhes

Associated Product

ImagemNúmero de peça do fabricanteDescriçãoAvailable QuantityPreçoVer detalhes
MOSFET P-CH 20V 250MA VESMSSM3J35AMFV,L3FMOSFET P-CH 20V 250MA VESM6527 - Immediate$0.18Ver detalhes
MOSFET N-CH 20V 500MA VESMSSM3K36MFV,L3FMOSFET N-CH 20V 500MA VESM394313 - Immediate$0.29Ver detalhes
MOSFET N-CH 20V 1.4A CST3SSM3K56ACT,L3FMOSFET N-CH 20V 1.4A CST380000 - Immediate$0.33Ver detalhes
MOSFET P-CH 20V 1.4A CST3SSM3J56ACT,L3FMOSFET P-CH 20V 1.4A CST326741 - Immediate$0.35Ver detalhes
MOSFET P-CH 20V 10A 6UDFNBSSM6J501NU,LFMOSFET P-CH 20V 10A 6UDFNB33834 - Immediate$0.53Ver detalhes
MOSFET N-CH 30V 15A 6UDFNBSSM6K513NU,LFMOSFET N-CH 30V 15A 6UDFNB1658 - Immediate$0.61Ver detalhes
MOSFET N-CH 40V 12A 6UDFNBSSM6K514NU,LFMOSFET N-CH 40V 12A 6UDFNB0 - Immediate$0.63Ver detalhes
MOSFET P-CH 60V 3.5A SOT-23FSSM3J351R,LFMOSFET P-CH 60V 3.5A SOT-23F40461 - Immediate$0.48Ver detalhes
IC CMOS 1 CIRCUIT UFVTC75S67TU,LFIC CMOS 1 CIRCUIT UFV9934 - Immediate$0.24Ver detalhes
Published: 2020-07-02

Related Product Highlight

TCR3U Series LDO Regulators Toshiba's TCR3U series of LDO regulators help improve battery life in mobile devices by offering very low bias current.
Smart Speaker Solutions Toshiba's high-performance and small package discrete components are suitable when space, complicated noise issues, and cost sensitive designs are needed.
Powertool Solution Toshiba's MOSFETs, drivers, and photocouplers for cordless power tools have long battery life and high power.

Related Articles and Blogs

Como usar fusíveis eletrônicos para projetar soluções compactas de proteção térmica, contra curto-circuito e sobretensão Use fusíveis eletrônicos (eFuses) para proporcionar proteção ajustável, rearmável e de alta velocidade para circuitos, com alta precisão que atendam as normas IEC/UL62368-1 e UL2367.

Related Product Training Modules

General Purpose Discrete Items Overview of the general purpose discrete items including diodes, MOSFETs, bipolar transistors, and transistors with built-in resistors.