UCC27518DBVR Integrated Circuits (ICs)

UCC27518DBVR Application Field and Working Principle

UCC27518DBVR is a low-side gate driver which has been developed by Texas Instruments [1]. It is a monolithic device that includes two High-Side and two Low-Side n-channel MOSFET gate drivers. It is designed based on the company\'s advanced digital isolation technology, with the architecture of silicon-based electrical channel isolation characteristics, and is designed to meet the demands of various of digital control systems. Compared to the traditional electro-mechanical and opto-electrical isolation, UCC27518DBVR is less costly and far more efficient. It is primarily used as a level shifter and opto/electro-isolator, and can also be used as a general purpose digital isolator in various digital control systems. This device can be classified as a PMIC – Gate Driver.

UCC27518DBVR has two input channels, one corresponding to a High-Side MOSFET gate driver and one corresponding to a Low-Side MOSFET gate driver. Each of the channels has an input, ENA, which is used to enable the respective gate drivers when low-active is present, and an output, V_OUT, which is used to enable the respective gate drivers when high-active is present. It also has two enable/disable control signals, ENA1 and ENA2. This device has a wide operating voltage range of 2.5V-18V, allowing it to be used in high-voltage applications. Moreover, it features an internal pull-up voltage of 1.2V and an internal pull-down voltage of 0.2V, allowing it to be used with various high-side and low-side MOSFETs with different operating voltages.

Working Principle of UCC27518DBVR

UCC27518DBVR works based on the conventional digital isolation principle that every digital control system requires an isolated power supply to provide an isolated interface between the system and the external environment. When electricity is passed through a silicon material, electrical charges can be shifted from one end of the material to the other end due to the silicon material\'s characteristics. The electrical charges are then separated by an additional layer of isolation material, such as a polymer film, and directed to the two gate driver outputs, V_OUT and NV_OUT. By applying a digitally controlled signal from the input, ENA, the V_OUT output will be inverted at the same time, and its corresponding output, NV_OUT, will be active. This process can be used for both High-Side and Low-Side MOSFET gate driver applications.

Application Field

UCC27518DBVR is mainly used in digital control system applications, such as automotive powertrain systems, electric vehicle control systems, industrial system controls, and consumer appliances. This device can be used as a level shifter and opto/electro-isolator, or as a general purpose digital isolator. It is designed to meet the needs of various digital control systems and can be used to isolate signals between different parts of a system.

Moreover, UCC27518DBVR is an ideal choice for applications that require fast switching, such as in motor control systems, powertrain systems, and industrial control systems. This device can be used to switch the gate driver signals in real-time, with a switching time of less than 8µs (microseconds). This enables faster response times for motor control as well as improved system efficiency. It is also suitable for applications where a large voltage difference needs to be shifted between two sources, as the device can shift levels up to 18V.

Conclusion

UCC27518DBVR is a low-side gate driver developed by Texas Instruments, and is mainly used in digital control system applications. It is based on the conventional digital isolation principle, and provides an isolated interface between the system and the outside environment. It features a wide operating voltage range of 2.5V-18V, allowing it to be used in high-voltage applications. It is also suitable for applications requiring fast switching, as it can switch gate driver signals in real-time, with a switching time of less than 8µs. This device can be classified as a PMIC – Gate Driver.