ISL6620CRZ

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PMIC, or Power Management Integrated Circuit, is often seen as the first line of protection in power-driven applications such as automotive, industrial, medical and aerospace. One of the most widely used PMICs is the Infineon ISL6620CRZ, which is a gate driver for integrated power switching devices. In this article, we will discuss the application field and working principle of the ISL6620CRZ.

Application field of the ISL6620CRZ

The ISL6620CRZ provides a high-current, low-noise and reliable output for switching applications in device power-up/down and boost/buck conversion operations. As a part of Infineon’s widely deployed family of switching power ICs, the ISL6620CRZ can be used in power converters and power systems to provide high-efficiency and superior thermal management. It is also suitable for a wide range of systems, such as motor control, battery management, automotive and industrial control, solar and wind power generation, lighting systems and smart platforms. The ISL6620CRZ provides excellent noise reduction while driving loads as low as 1Ω with low power loss.

Working Principles of the ISL6620CRZ

The ISL6620CRZ is designed to drive an external power switch. It operates in three modes: low-side drive, high-side drive and phase-shift. In low side drive mode, the device connects the ground for the bridge and drives the upper side power switch, while in high side drive mode it connects the power supply and drives the lower side switch. In phase-shift mode, the device first charges the gate capacitance and then shifts the voltage level to drive the switch with a certain phase shift. This enables the use of high-switch frequency for efficient power conversion, while also providing superior noise immunity.

The ISL6620CRZ also features a current limit function, which helps to protect the external power switch in the event of an over-current event. The device further features a thermal warning output which will indicate when the maximum junction temperature is reached. This ensures the maximum rated currents won’t be exceeded and improves reliability. It has an adjustable under-voltage lockout (UVLO) circuitry which will shut off the device in case of input voltage drops below a certain level. The device also comes with full protection against pulsing and overtemperature.

The ISL6620CRZ is also designed with a low quiescent current, which ensures minimal heat dissipation in stand-by mode. It is further designed to save board area and reduce solution cost. The device has a built-in combined blanking time control and 0.5µs turn-on/ -off delay which helps to reduce switching losses. With a maximum operating temperature of up to 105°C, this device can ensure reliable operation in extreme environment.

Conclusion

The ISL6620CRZ is designed to meet the stringent requirements of high-current switching power supplies and battery management. It is ideal for a wide range of applications, such as motor control, automotive and industrial control, solar and wind power generation, and lighting systems. It provides excellent noise reduction even at low resistive loads and can also provide superior thermal protection. With its built-in protection features, the ISL6620CRZ ensures reliable operation even in harsh environment.

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