ISL6520BIR

PMIC - Voltage Regulators - DC DC Switching Controllers

The ISL6520BIR is an integrated dual-channel DC-to-DC controller and driver solution for advanced Point-of-Load (POL) converters. This device can be used to regulate current and voltage across multiple outputs simultaneously, and is intended for high voltage applications such as on-board DC-DC switching converters. This controller is optimized for synchronous rectification, allowing for increased efficiency in high-current applications with improved heat dissipation.

Application Field

The ISL6520BIR can be used in a variety of applications, such as server and data center POLs, where both low power and high power output voltages are required. Additionally, the device can be used in distributed power architectures, where it can provide efficient power distribution across multiple outputs. The device is also suitable for automotive applications, such as Advanced Driver Assistance Systems (ADAS), where its fault-protection features enable extra safety control.

Working Principle

The ISL6520BIR operates as a standard DC-DC converter which uses a power MOSFET switch and transformer to provide regulated output voltage. The device uses Pulse Width Modulation (PWM) control to regulate the pulse width of the MOSFET switch and thus the output voltage. The controller can also operate in PWM-controlled Burst Mode (BM), where the switching MOSFET is turned on for a fixed time each cycle, reducing switching losses as well as ripple on the output voltage. The output voltage can be adjusted through an external feedback pin for easy system integration.

The device also integrates a synchronous rectifier, allowing for increased efficiency in high current applications. The integrated synchronous rectifier ensures conversion efficiency higher than 95%, while also reducing heat dissipation and thus improving power density. Additionally, the controller integrates a fault protection system which will shut down the output if an overload, short circuit, or over temperature condition is encountered.

Conclusion

The ISL6520BIR is an advanced dual-channel DC to DC controller, capable of regulating dc-volts and currents simultaneously. This controller has a wide application field, such as server and data center power distribution, distributed power architectures, or automotive applications. In addition to its wide usage, it also offers high performance, efficiency and integrated fault protection.