TPS28226DRBT

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Texas Instruments\' TPS28226DRBT device is a gate driver, an example of the high-side integrated switch family, which is based on a state-of-the-art advanced process and includes a full high-current driver with enhanced slew rate control. The device works with 3.2 V to 6.5 V VDD, a 0.25 μA standby current, and a total differential output current of 5 A. It is also important to note that, while the device is capable of a 5 A peak current, the power dissipation at the point of load (power from the input pins to the output pins) is 1.5 A continuous, with a maximum peak of 5 A.

The TPS28226DRBT application field and working principle can be broken down into the following components:

Gate Driver

The TPS28226DRBT gate driver is an integrated switch which utilizes a high-side MOSFET through which the power for the load being driven is provided. This high side switch reduces losses due to the lower gate drive resistance of the device, as the MOSFET is closer to the source of the gate signal (Vdd). Furthermore, the integrated switch includes gate drive logic, which ensures that the upper MOSFET is enabled in order to turn on the circuit while the lower MOSFET remains off. This ensures that power is delivered to the output side of the circuit.

Power Dissipation

In addition to the gate driver, the TPS28226DRBT calculator includes a power dissipation feature which ensures that the maximum power dissipation is kept within the limits of the device. This power dissipation feature works by monitoring the current draw from the input pins to the output pins and acting on the gate drive logic to turn off the upper MOSFET if the peak power dissipation exceeds 1.5A. This feature allows for the use of the device in applications which require higher power transfer.

Current Sense Resistors

The TPS28226DRBT also includes current sense resistors, which measure the current being drawn through the integrated switch. This value can then be used to monitor the power dissipation and ensure that the peak power dissipation remains below the 1.5A limit. The device includes one resistor per power switch, with a typical value of 6.0 mΩ.

Slew Rate Control

The device also features slew rate control, which improves the overall switching performance of the integrated switch. This feature works by limiting the rise and fall times of the MOSFETs in order to reduce any ringing or noise that may be present in the circuit. This feature allows for higher switching frequencies, as it helps to reduce power consumption, lower the EMI signature of the device, and decreases the switching time of the device.

Applications

Given its wide range of features and benefits, the TPS28226DRBT is well-suited for a variety of applications. These include automotive, audio, and consumer applications such as DC/DC converters, switching regulators, power control modules, motor controllers, and high-voltage lighting systems.

Conclusion

The TPS28226DRBT device is a powerful and versatile gate driver, offering wide ranging features and benefits suitable for a variety of application needs. The device offers a high-side integrated switch with a full high-current drive and enhanced slew rate control, in addition to the power dissipation sensing, current sense resistors, and slew rate control features. With these features, the TPS28226DRBT device is a great choice for a wide variety of applications.

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