ISL6127IR

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ISL6127IR Application Field and Working Principle

The ISL6127IR is a dual-phase, high current pulse-width modulation (PWM) voltage regulator controller with integrated drivers, optimally designed for demanding VR12.5 or VR13.3 compliant designs. It is a power supply controller, monitor and regulator, developed by Intersil, which is optimized for microprocessor core voltage applications. This article will discuss the application fields and working principle of the ISL6127IR.

Application Field

The ISL6127IR is a multi-phase voltage regulator controller designed for high power processor thermal demands. It can be used in many different types of applications such as power supplies, motherboards, server and personal computers and any device where high current PWM regulation is desired. In addition, the ISL6127IR can be used for VR12.5 and VR13.3 compliant designs, allowing it to be used in diverse application fields such as automotive and industrial, networking, servers and gaming.

The ISL6127IR uses a synchronous buck flyback topology to provide up to 8+2 phase current sharing, allowing it to deliver a total switching current of up to 1000 A. This topology enables the ISL6127IR to respond quickly to downstream load changes, minimizes output voltage ripple, reduces thermal stress and saves space. In addition, it can operate with a wide range of inductor values and power input voltage, making it a highly reliable and efficient solution. Furthermore, it comes with internal linear regulators, which help to reduce output voltage drift and enhance overall system reliability.

Working Principle

At the heart of the ISL6127IR design is a buck-flyback topology, which works by using a pair of integrated MOSFETs (input section) and a pair of power MOSFETs (output section) to convert a fixed DC source voltage into a regulated output voltage of 12 V or 13.3 V. The switching frequency of the device is adjustable and ranges from 100 kHz up to 500 kHz depending on the application. The integrated current and voltage sense amplifiers enable the device to perform adjustable current sharing, allowing it to quickly respond to downstream load changes and to reduce the overall system output voltage ripple.

The ISL6127IR is able to synchronize with the microprocessor clock, enabling it to generate the switching signal with a very high accuracy, thus ensuring the highest system efficiency possible. The device also features comprehensive protection circuitry which can monitor for over-voltage, over-current, under-voltage, thermal and power supply related faults. Furthermore, integrated VR faults can be detected and reported via a PMBus interruption.

Conclusion

In conclusion, the ISL6127IR offers a high current pulse-width modulation voltage regulator controller with integrated drivers, optimally designed for demanding VR12.5 or VR13.3 compliant designs. It provides a synchronous buck flyback topology to provide up to 8+2 phase current sharing, allowing it to deliver a total switching current of up to 1000 A. Additionally, it is able to synchronize with the microprocessor clock and features comprehensive protection circuitry which can monitor for over-voltage, over-current, under-voltage, thermal and power supply related faults.

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