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Various types of power tools are marketed for a wide range of applications from household to professional use. Recently, the adoption of high-capacity lithium-ion batteries leads to a shift to cordless types that are compact, light, easy-to-carry, and easy-to-work-with, not only for household use but also for professional use such as hammer drills, impact wrenches, nailers, staplers, and round saws. The capability of cordless power tools to operate for longer time periods with a single charge is one of the major qualities for users when choosing the goods. Toshiba’s lineup of MOSFET, motor control drivers, photocouplers, and other products that use the newest technologies helps designers make efficient use of limited battery capacities.
By using a dedicated Toshiba TC78B016FTG motor driver, three-phase brushless motors with inverter control can be easily driven. Large-capacity brushless motors can also be driven by using a Toshiba TB6634FNG external driver-type motor-controlled driver. Low heat generation and low power dissipation can be achieved when using Toshiba’s MOSFETs: TPWR8004PL, TPHR8504PL with low on-resistance and high heat dissipation efficiency as a driver. In addition, the use of small package products makes it easier to reduce the board area without sacrificing power.
Operational Amplifiers like the Toshiba TC75S67TU are useful for current monitoring circuits for the system power supply and the detection of abnormalities in the equipment. Op-amps are also great for battery protection circuits when combined with temperature sensors. In addition, Toshiba’s LDO family and TAR5SB are useful for the system power supply as it reduces noise generated by the motor drive section, allowing a stable system to be configured.
Recommended for 3-phase Brushless Motor Drive
Bipolar transistors (NPN/PNP) TMBT3906 and 2SC4116 can be used to configure MOSFET drivers for a brush-motor drive. Using low on-resistance, high-heat-dissipation products for MOSFET drivers causes low heat generation and low power dissipation. On the other hand, high-breakdown characteristics are also required in consideration of the counter electromotive forces in the motor. Therefore, suitable products such as Toshiba TPWR8004PL and TPHR8504PL should be selected for each application. In addition, the use of small package products makes it possible to reduce the board area.
Recommended for Brush Motor Drive
Since MOSFETs used in the PFC-circuit of AC-DC power supply require high breakdown voltage and low on-resistance, it’s important to select a MOSFET that meets both requirements. Toshiba offers the TK17A80W, in addition to a wide variety of other MOSFETs in small and large packages.
In voltage-feedback circuits, signal transmission over electrical isolation on the primary and secondary sides is achieved by using a photocoupler like the TLP385.
Protection is similarly important in any power supply circuit. The Toshiba TCKE8xx Series eFuse IC is designed for battery power supply lines where unexpected surges may occur. Overall system quality and reliability are improved with an eFuse IC.
Recommended for Battery Charging
