UCC27538DBVR

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PMIC (Power Management Integrated Circuit) – Gate Drivers are specialized power management devices used to efficiently switch electrical loads, such as large inductors, ultracapacitors and motor controllers. They are typically used in high-side switching applications where current must be switched on and off rapidly. The UCC27538DBVR is commonly used in such applications.

The UCC27538DBVR is a dual FET half-bridge gate driver with integrated fast-discharge and low-voltage lockout. It is designed to drive high-side high-voltage Power MOSFETs in applications that require excellent transient response. The unit is housed in a compact 8 pin VDFN package, making it an ideal choice for space-constrained applications.

The UCC27538DBVR is commonly employed in applications such as battery management systems, hybrid vehicles, and industrial motor control. It is a highly integrated device, eliminating the need for external power connections, but offering a wide range of features. It offers fast switching frequency and low-jitter operation for high efficiency, precise control and low-noise operation. It is also voltage-controlled, allowing precise control of the gate voltage.

The UCC27538DBVR provides a straightforward method of driving output devices such as power MOSFETs, IGBTs and amplifiers. It features two independent FET half-bridge drivers, each with a separate control input to enable individual control of each channel. The unit also includes an adjustable fast-discharge network, which provides fast ramp-down of the gate voltage when the device is turned off. This ensures reliable switching of the output FETs without overshoot or ringing.

In addition, the UCC27538DBVR includes an integrated low-voltage lockout (LVO) feature. This blocks the output when the input voltage falls below a programmable level. This prevents pulsing and allows the device to operate from a battery, whilst protecting it from low-voltage conditions. It also allows the device to be ‘hot-plugged’, eliminating the need to power cycle the system.

The UCC27538DBVR is also equipped with a wide range of features designed to improve system reliability. These include an adjustable current limit, thermal shutdown, and undervoltage protection. It is also capable of operation to 100KHz, making it suitable for a variety of high-speed motor control applications. By providing this combination of features, the UCC27538DBVR offers an efficient and reliable way to control high-voltage MOSFETs.

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