JSM2524S15

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DC DC Converters: JSM2524S15 Application Field and Working Principle

DC-DC converters are essential components for system designs employing multiple power rails. Specifically, the JSM2524S15, a dual-output non-isolated switching regulator, offers large power density and excellent performance as well as easy layout. This document explains the application field and working principle of the JSM2524S15, and its benefits.

Application Field

The JSM2524S15 is a perfect choice for a wide variety of applications. It features current-mode control, enables high-efficiency output voltage of 1.2V-3.6V, and outputs up to 18A load current. This is suitable for PCs, servers, networking equipment, digital home appliances, automotive electronics, and more. In particular, the JSM2524S15 features excellent output transient-response characteristics, making it an ideal selection for high-performance computing applications.

Working Principle

The JSM2524S15 works through an advanced PWM architecture. It is a current-mode topology with two current paths, from input to each output. In addition, the output loop includes a low power output voltage feedback circuit and a synchronous rectifier circuit, as well as a pre-conditioning circuit for either output. Functionally, the JSM2524S15 acts as a DC-DC converter that can draw two outputs of a desired voltage level, up to 18A. The two outputs can be adjusted independently, allowing for multiple power conversion scenarios.

In summary, the JSM2524S15 operates its two output voltage levels through two sets of current paths, each path (also referred to as a “phase”) consisting of a PWM generation block, a Synchronous Rectifier (SR) circuit, and a low power voltage feedback circuit. Here, the PWM generation block is responsible for generating a Pulse Width Modulated output for driving the external output switch (MOSFET) of either output, and the SR is responsible for regulating the current of each output during transient conditions.

Benefits

Advantages of the JSM2524S15 include high power density and efficiency, as well as excellent electrical characteristics. The chip has a wide range of voltage adjustability, and is capable of regulating both outputs exactly the same or separately. It also features low power standby mode for reduced power consumption, making it highly power efficient.

The JSM2524S15 offers superior performance, featuring exceptional transient-response characteristics, high voltage accuracy, and excellent thermal management. It includes built-in, short-circuit protections such as output current limit and hiccup-mode self-protection, both of which are essential in today’s high-power systems. In addition, the chip supports a wide temperature range of -40°C to +85°C, and is highly reliable, with an expected lifetime of more than 25,000 hours.

Conclusion

The JSM2524S15 is a dual-output current-mode non-isolated switching regulator offering high power density and excellent performance. It is suitable for many applications, especially for high-performance computing applications. The chip offers a wide range of adjustable voltage levels, excellent electrical characteristics, high efficiency, low power standby mode, short-circuit protections, and a wide temperature range, making it a great choice for today’s power-hungry systems.

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