TPS2812DR

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TPS2812DR is a 3-phase gate driver for N-channel MOSFETs, designed for synchronous rectification applications in AC/DC electronic power systems. It is a low-cost and low-voltage product from Texas Instruments that provides system designers with a high level of flexibility and reliability for high-current applications. The TPS2812DR is a cost-effective and low-power device that is ideal for powering gates of large MOSFETs in automotive and industrial electronics applications.

Applications of TPS2812DR

The TPS2812DR is ideal for use in applications that require low-voltage, high-current gate driving. Some common applications of TPS2812DR include:

• Switched-mode power supplies (SMPS)
• AC/DC motor drives
• DC/AC inverters
• Battery charging systems
• AC/DC adapter modules
• High-power motor controllers
• Industrial motor controllers
• AC/DC power switches
• Electric vehicles
• Robotics

Working Principle of TPS2812DR

The TPS2812DR gate driver is a monolithic integrated circuit that can use an external reference voltage of 3.3 to 50V to drive MOSFETs. The internal isolator is galvanically isolated from the system and has a CMOS output structure. The internal operating frequency of the TPS2812DR is set at 250KHz with an adjustable maximum load current up to 1.8A. The output of the device drives N-Channel MOSFETs with a maximum gate voltage up to 55V.

The device operates on supply voltage of up to 50V. The minimum operating voltage of the TPS2812DR is 7V, providing efficient output current storage and fast recovery. The device supports a wide inputvoltage range of 3.3 V to 50 V and provides a high common-mode rejection ratio (CMRR) of 100 dB.

When an acknowledgement signal on the IN1 pin is received, a start signal is sent to the MOSFETs. When the start signal is sent, the output will turn on and current will flow to the MOSFETs. If the current increases beyond the device’s limit, the internal protection circuit overrides the start signal and the output will be turned off. The internal operating frequency of TPS2812DR is set at 250KHz with an adjustable maximum load current of up to 1.8A.

The device uses a comparator for the high-side and low-side outputs, an operational amplifier for the adjustment of the output-drive strength. The device also features protection circuits such as over-voltage, over-current, and under-voltage protection. The TPS2812DR is capable of driving up to 30 N-channel MOSFETs without any external power or driver.

Conclusion

The TPS2812DR is a cost-effective and low-power device that is ideal for powering gates of large MOSFETs in automotive and industrial electronics applications. Its low-voltage operation and high-current gate drive capability make it a suitable choice for a wide range of applications, such as switched-mode power supplies, AC/DC motor drives, DC/AC inverters, battery charging systems, AC/DC adapter modules, high-power motor controllers, industrial motor controllers, AC/DC power switches, electric vehicles and robotics.

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