JSM2548S3V3

DC-DC converters are power conversion electronic components used to convert a voltage from one level to another. Among them, DC-DC switching converters, as the most common power conversion electronic components in modern electronic equipment, have a wide range of applications.

The JSM2548S3V3 is a monolithic DC-DC switching converter that integrates a high-efficiency switching transformer and output inductor into a single IC package. It operates from an input supply of 3V to 3.6V and produces a regulated output voltage of 3V, suitable for powering small-current 3V integrated circuits.

Application Field

The JSM2548S3V3 is suitable for various applications, such as central processing unit (CPU) voltage regulators, portable audio, consumer digital audio, portable DVD, LCD TVs, digital cameras, and cellular base stations. It can also be used in embedded systems like automotive electronic equipment, global positioning system (GPS), medical equipment and instrumentation, consumer electronics, etc.

Working Principle

The JSM2548S3V3 is an electronic switching converter that uses pulse-width modulation (PWM) control to regulate the output voltage. Its switching frequency is between 90kHz and 400kHz, making it suitable for high-frequency applications. The converter converts the input voltage into an alternating voltage through the primary side of the transformer using a MOSFET switch driven by the PWM control circuit. This alternating voltage is then rectified and filtered on the secondary side of the transformer to produce a regulated DC output voltage.

The converter also includes an internal frequency compensation circuit that eliminates the external components that would otherwise be required for frequency compensation. An internal oscillator generates a symmetrical triangle waveform with an adjustable frequency, which controls the duty cycle of the PWM signal that drives the MOSFET switch. The recommended duty cycle range is between 20% and 80%.

Output Power Limitation

The JSM2548S3V3 can deliver up to 3A output current. The maximum output power is limited to 8W. If the output power needs to be increased, an external power switch can be used in combination with the JSM2548S3V3

Conclusion

The JSM2548S3V3 is a high efficiency DC-DC switching converter integrated with a switching transformer and output inductor in a single IC package. It is suitable for a multitude of applications such as CPUs, audio equipment and instrumentation. The device operates from an input supply of 3V to 3.6V and produces a regulated output voltage of 3V, suitable for powering small-current 3V integrated circuits. The maximum output power is limited to 8W but can be increased with the use of an external power switch.