MCP14A0452T-E/RW

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PMIC - Gate Drivers : MCP14A0452T-E/RW Application field and Working Principle

MCP14A0452T-E/RW is a power management integrated circuit (PMIC) designed by a specialist semiconductor producer, Microchip Technology. This part is an example of the large family of PMIC Gate Drivers, specifically designed to drive external high-side or low-side N-channel MOSFETs or IGBTs. This type of device is included in a large group of switch mode power supply (SMPS) platforms, automotive ADAS (Advanced Driver Assistance System) systems and DC-DC converter platforms. Here we\'ll take a look at the application field and working principle of MCP14A0452T-E/RW.

Application Field

The drivers supplied by MCP14A0452T-E/RW are perfect for driving the Gate of N-channel MOSFETs or Bipolar IGBTs integrated in high-performance, high-efficiency power supplies, displays, motor control and DC-DC applications. This IC is capable of supporting drain currents up to 10 A and can operate between a wide input voltage of 4.5 V and 28 V. This part is attractively priced for cost-sensitive applications. MCP14A0452T-E/RW is available in tiny SOIC-8 package.

The circuit can be configured to operate in a single shot PULSE mode, continuous PULSE mode, or single shot PMW mode. As mentioned, the circuit also contains a 2.5 V (typical) low power startup voltage regulator, which is voltage-based and active all the time, thereby avoiding any ON time losses in the gate driver circuit. The device is protected against any outside interference, making it very reliable

Working Principle

MCP14A0452T-E/RW incorporates all the necessary circuitry to successfully drive an external load. The external load can either be an N-channel MOSFET, Bipolar IGBT or other type of high current switch. The operating philosophy behind this device is quite simple. The Gate signal is driven through a constant on-time (COT) signal, which allows for continuous and stable Gate driving. This ensures that the device is always in control of the full power range of the external load.

The COT signal is determined by the internal comparator and is derived by sensing the voltage across the Gate and Drain. By controlling the Gate drive via the COT signal and using a low-power startup voltage regulator, the circuit is able to achieve clean and reliable Gate driving. The COT signal also makes sure that the external load is protected from any overvoltage or overcurrent conditions. Furthermore, the circuit has ESD protection and overcurrent protection.

Apart from that, it comes with thermal shutdown protection, making sure that the device never gets into any thermal overload situations. This protection is especially needed when the device is utilized at higher current levels. Lastly, the circuit also includes built-in slew rate control, meaning that the Gate voltage transition can be accurately controlled.

Conclusion

In this article we explored the application field and working principle of the MCP14A0452T-E/RW PMIC, a Gate Driver designed to drive external high-side or low-side N-channel MOSFETs or IGBTs. This type of IC is especially useful for driving external loads in a variety of power supplies, automotive, and DC-DC applications. Thanks to its COT (constant on-time) signal, thermal shutdown protection and ESD protection, MCP14A0452T-E/RW is able to deliver reliable, stable and safe Gate driving for a range of external loads.

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