TK4A60DA(STA4,Q,M)

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The TK4A60DA (STA4,Q,M) is a single MOSFET (metal oxide semiconductor field effect transistor) from Toshiba\'s U-MOS IV family of MOSFETs. This series of MOSFETs, introduced in 1990 by Toshiba, offer cost-effective, efficient performance and are suitable for use in a variety of applications. This article provides a brief overview of the TK4A60DA MOSFET and its specific application fields and working principles.

Usage and Application Fields

The TK4A60DA is a 30V MOSFET with a drain-source current of 4A. It has a maximum drain-source breakdown voltage of 40V and a gate-source threshold voltage of 2V. With a maximum power dissipation of 8.1W, this MOSFET is ideal for use in a variety of applications including battery-powered devices, power management, and power conversion. Furthermore, the device is suitable for use in switching, motor drive and lighting control.

This MOSFET is also used in automotive electronics including engine control, and is also suitable for use in monitoring chips such as the MAXIM MAX751A for providing over-voltage and over-current protection. The device is widely used in portable electronic products, like cell phone chargers, digital cameras, and game consoles, as well as in UPS systems, SMPS, and other industrial applications.

Features and Benefits

The TK4A60DA has a low on-resistance of 0.024Ω, making it suitable for use in high power applications. It also has excellent switching characteristics; with a low input capacitance of 92pF and a minimum gate charge of 2nC, this MOSFET can switch quickly with low noise and low power consumption. The device has a reverse recovery time of 25ns, allowing it to switch rapidly between its on and off states. In addition, the device is thermally enhanced, allowing it to dissipate heat quickly and efficiently.

The TK4A60DA also provides positive temperature coefficient (PCT), meaning that its on-resistance increases with an increase in temperature. This feature helps protect the device from excessive current, keeping it operating within its safe operational limits.

Working Principle

The TK4A60DA is a depletion-mode MOSFET, meaning that it operates with the gate-source voltage below the threshold voltage level. The device can be used as a switch, allowing it to switch currents on and off incircuits. When the gate-source voltage reaches the threshold voltage of 2V, the device turns on, allowing current to flowthrough the drain-source terminals. When the gate-source voltage drops below the threshold voltage, the device turns off and current flow stops.

The TK4A60DA is designed to help maintain constant current flow, useful in applications like motor drive and lighting control. The device can be used to regulate current and voltage in these applications by adjusting the gate-source voltage level. When the gate voltage is increased, the device turns on more, allowing more current to flow through the device. Similarly, when the gate voltage is decreased, the device turns off, reducing the flow of current.

Conclusion

The TK4A60DA (STA4,Q,M) is a single MOSFET from Toshiba’s U-MOS IV family of MOSFETs. This MOSFET is popular for its low on-resistance, excellent switching characteristics, and thermal characteristics. It is suitable for use in a variety of applications, such as motor drive, lighting control, and power management. Its working principle involves the use of gate-source voltage to regulate the flow of current through the device.

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