TC78S121FTG,EL Integrated Circuits (ICs)

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TC78S121FTG,EL application field and working principle

TC78S121FTG, EL is a motor driver and controller that is classified under the Power Management IC (PMIC) category. It is a highly-integrated device providing features such as current regulation, over temperature protection, adjustable dead time, etc. This integrated product performs PWM conversion, current limits and protection, voltage regulation and user-adjustable functions.

Application of TC78S121FTG,EL

The TC78S121FTG,EL is suitable for a wide range of applications like battery-powered applications, brushless DC motors and commercial/industrial applications. It can be used as an amplifier for audio systems, and in wind turbines for controlling the shaft speed. With its built-in features such as current regulation and over temperature protection, it is also ideal for use in 3-phase motor drives, LED lighting systems and fans.

Working Principle of TC78S121FTG,EL

The TC78S121FTG,EL contains three independent current-mode half-bridge drivers in 6mmx6mm QFN package and requires an external PWM signal to control the motor speed. The device utilizes a three-stage driver logic to deliver a simplified and more efficient power stage design with power up to 40A for each channel. The TC78S121FTG,EL offers a high switching frequency, adjustable dead time, over-current and over-temperature protection to ensure maximum system reliability.

The TC78S121FTG,EL is controlled by a fast and linear current loop that provides constant current operation and generates a stable output voltage while maximizing efficiency. With the built-in Current Limit Tolerance (CLT) feature, this device can further improve efficiency and reduce component size. The output voltage can be adjusted through the MCU SPI or analog input.

Conclusion

The TC78S121FTG,EL is a powerful motor driver and controller that can be used in a wide range of applications. Its features such as current regulation, over temperature protection and adjustable dead time allow it to meet the needs of many applications. With its built-in features and the ability to adjust the output voltage, it makes TC78S121FTG,EL the perfect choice for motor control applications.

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