ISL6522BCR

Integrated Silicon Solution（ISL）6522BCR is a high-efficiency, low-EMI, bidirectional DC/DC converter switching controller specially designed to maximize the battery lifetime in a high-performance system. It integrates a 5MHz low-noise high-speed 1A peak current amplifier and a patented high-efficiency control mode, making it ideal for use in both non-isolated and isolated DC/DC converters that are used in distributed power systems.

The ISL6522BCR is designed to manage and monitor an external resistance on the power path to provide a controlled current or power delivery to a load. It operates up to 2MHz with a 2μs settling time. It offers fast transient response, clean MOSFET switching, low switching losses, low ripple noise and low system cost. This product also supports asynchronous dual-mode pulse width modulation (PWM) with a wide frequency range and synchronous and asynchronous flyback topologies.

The ISL6522BCR is suitable for low-voltage and high-power applications such as 32V vehicles and point-of-load applications. The device includes a low-voltage reset feature that helps prevent output overloading if the input voltage drops below the normal operating range. It also includes protection against output short-circuit, over-voltage and inrush current. In addition, the integrated over-temperature protection shuts down the IC to avoid damage. The features including PGOOD indication, spread spectrum capability and cycle-by-cycle current limit, help minimize the EMI and reduce the external components count.

Working Principle

The ISL6522BCR is a pulse-width modulation (PWM) versatile switching controller, which operates similarly to the standard buck controllers. When its switch is turned on, the inductor current increases linearly and the local internal feedback loop modulates the on-time of the switch in order to maintain the output voltage. When the current reaches its peak value, the switch is turned off and the inductor current is resonantly clamped by the output capacitor. Afterward, the falling slope of the inductor current decays exponentially until the next switching cycle. The peak current control loop is used to limit the maximum inductor current and protect the external power switch from overcurrent.

Application Field

The ISL6522BCR is ideal for non-isolated and isolated DC/DC converters. It is most suitable for distributed power systems, as it is designed for low-voltage and high-power applications. The device integrates a 5 MHz low-noise high-speed 1A peak current amplifier and a patented high-efficiency control mode. It is suitable for asynchronous dual-mode PWM with a wide frequency range, as well as synchronous and asynchronous flyback topologies.

The ISL6522BCR can be used in high-performance systems while still achieving maximum battery lifetime due to its low-EMI and high efficiency. This device is ideal for applications where fast transient response, clean MOSFET switching, low switching losses, low ripple noise, and low system cost are essential.

The ISL6522BCR is used in applications such as point-of-load applications, DC/DC buck converters, LLC resonant converters, switched-capacitor converters, DC/AC inverters, and automotive applications. It can also be used in other applications that require tight control with low-EMI switching performance.

Conclusion

The ISL6522BCR is a high-efficiency, low-EMI, bidirectional DC/DC converter switching controller. It integrates a 5MHz low-noise high-speed 1A peak current amplifier and a patented high-efficiency control mode, and is ideal for use in both non-isolated and isolated DC/DC converters. It is suitable for asynchronous dual-mode pulse width modulation (PWM) with a wide frequency range and synchronous and asynchronous flyback topologies. In addition, the device also supports low-voltage reset, output short-circuit, over-voltage and inrush current protection, and includes features like PGOOD indication, spread spectrum capability, and cycle-by-cycle current limit to minimize the EMI and reduce external components count. The ISL6522BCR is used in applications like point-of-load applications, DC/DC buck converters, LLC resonant converters, switched-capacitor converters, DC/AC inverters, and automotive applications, and it is suitable for high-performance systems to maximize the battery lifetime.