ICL7667CBA-T

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Modern electronic systems require many transistors to switch voltages and currents at various points in the system. This is why the use of gate drivers as a power management integrated circuit (PMIC) is important. Gate drivers are essential interface circuits between a device’s main logic signals and the external transistors used to control operating power, load energy, and temperature. The ICL7667CBA-T PMIC offers a limited set of features and is used in various applications. In this article, we will discuss the ICL7667CBA-T and its application in gate driving and its underlying working principle.

Overview of ICL7667CBA-T

The ICL7667CBA-T is a 10-pin quad supply, vector-controlled, gate driver PMIC from Intersil Corporation. This device is specifically designed to gate drive NMOS power transistors in a number of applications, including battery-operated systems and power supplies. One of the notable features of this PMIC is its low operating power, which helps extend battery life, reduce heat dissipation, and optimize system performance.

The ICL7667CBA-T PMIC is capable of delivering ±7A peak peak current into the NMOS power transistors. It can operate in any supply voltage range of 4V to 15V with a ±2V voltage range. It includes protection features such as output fault detecting, thermal protection, an electronic shutdown, and a locking current strength. The PMIC operates over a temperature range of -40°C to +125°C and is available in a compact 10-lead XDFN package, making it suitable for applications requiring tight space envelopes.

ICL7667CBA-T Application Field

The ICL7667CBA-T is most commonly used in battery-operated systems because of its low operating power requirements and its ability to deliver high peak current. It can also be used in automotive ignition systems, lighting control systems, and industrial machinery. Additionally, it can be used in applications that require the accurate regulation of loads, such as voltage regulators and switched-mode power supplies.

The ICL7667CBA-T is designed to provide high performance gate drive, making it ideal for applications that require soft switching and high efficiency. It also has a robust fault detection scheme to protect the system from any overcurrent, overvoltage, and over temperature conditions. Its wide operating temperature range, voltage range, and low power requirements make it suitable for a variety of applications.

Working Principle of ICL7667CBA-T

The ICL7667CBA-T is a vector-controlled PMIC, meaning that it has the ability to control its load current with a set of control inputs. This allows the PMIC to respond to changing input conditions and maintain its peak performance. The device’s operation is based on a technique known as on-time modulation. This is a method of controlling the output current by modulating the gate voltage such that the power transistor is not overstressed by excessive current.

The ICL7667CBA-T is capable of driving up to seven NMOS power transistors. The device has four internal current sources that compensate for the gate leakage current. These current sources are used to control the gate voltage of each power transistor independently. The PMIC also includes a logic-level translate circuit that translates logic signals into precise asymmetrical PWM or charge-controlled signals that can be used to control the power transistors.

The ICL7667CBA-T is capable of delivering a wide range of peak-peak frequencies up to about 500kHz. The PMIC also provides protection for the system against overcurrent, overvoltage, and over temperature conditions. Additionally, it has a shutdown line that can be used to disable the device in emergencies.

Conclusion

The ICL7667CBA-T PMIC is a vector-controlled gate driver that is designed to drive up to seven NMOS power transistors. It has a low operating power, which helps extend battery life, reduce heat dissipation, and optimize system performance. It is commonly used in battery-operated systems, automotive ignition systems, lighting control systems, and industrial machinery. The ICL7667CBA-T is capable of delivering a wide range of peak-peak frequencies up to 500kHz, and includes protection features against overcurrent, overvoltage, and over temperature conditions. Its wide operating temperature range and low power requirements make it suitable for a variety of applications.

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