Smart Watch

Solution Proposal

These documents explain the key points of recommended semiconductor products and their features. Please use them for product selection.

Name

Overall block diagram

Overall block diagram example

Sub block diagram

Power supply circuit (USB type)
Example of the power management and ESD protection circuit when USB is in use
Application / Smart Watch
Power supply circuit (Battery type)
Example of the power management and the reverse current prevention circuit when the battery is in use
Application / Smart Watch
Camera input circuit
Example of peripheral circuit of camera module (power supply and interface)
Application / Smart Watch
Display output circuit
Configuration example of an interface circuit corresponding to a display signal
Application / Smart Watch
Motor control for vibrators
Example of motor drive circuit and example of protection circuit for regenerative current of coil
Application / Smart Watch
Pulse detection circuit (Light emission side)
Example of an LED driving circuit used in an optical pulse wave sensor
Application / Smart Watch
Pulse detection circuit (Light detection side)
Example of a circuit for detecting an optical signal of an optical pulse wave sensor
Application / Smart Watch
Atmospheric pressure sensor circuit
Example of the atmospheric pressure sensor circuit using a resistance bridge
Application / Smart Watch
Temperature sensor circuit
Example of the temperature sensor circuit using an NTC thermistor
Application / Smart Watch

Documents

Name Date

Reference Design

PCB photo example of Power multiplexer circuit
Power Multiplexer Circuit Using Common-Drain MOSFET
This power multiplexer circuit with 2 inputs and 1 output is realized on a small board. A new power multiplexer circuit usign common-drain MOSFET has been added to the already developed power multiplexer circuit reference design. These reference circuits allow switching between BBM and MBB modes by combining optimal devices such as MOSFET gate driver ICs and zener diodes from our diverse product lineup.
Power multiplexer circuit / 2 input and 1 output
PCB photo example of Power multiplexer circuit
Power multiplexer circuit
In this reference design, a Power multiplexer circuit with 2 input and 1 output is implemented on a small PCB. MOSFET gate driver ICs, eFuse ICs, zener diodes and small package MOSFETs selected from Toshiba's diverse lineup are used create ideal diode like characteristics with BBM and MBB switching.
Power multiplexer circuit / 2 input and 1 output
Power supply circuit example of LDO regulator TCR3UG series application for power supply of IoT devices.
LDO Regulator TCR3UG Series Application for Power Supply of IoT Devices
This reference design provides document with low consumption current, PSRR, and dynamic response.The LDO has small package, low consumed power, and fast load transient response.
LDO Regulator / TCR3UG
Power supply circuit example of LDO regulator TCR15AG (fixed output voltage type) application & circuit.
LDO Regulator TCR15AG (fixed output voltage type) Application & Circuit
This reference design provides document with PSRR, dynamic response and controlling output voltage.The LDO has very small package and fixed output voltage for consumer application.
LDORegulator / TCR15AG
Power supply circuit example of LDO regulator TCR15AGADJ application & circuit.
LDO Regulator TCR15AGADJ Application & Circuit
This reference design provides document with PSRR, dynamic response and controlling output voltage. The LDO has very small package and adjustable output for consumer application.
LDO Regulator / Design / Support / Reference Design Center

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