FSL306LRN

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FSL306LRN Application Field and Working Principle

FSL306LRN is an isolated, offline Flyback converter, high-efficiency AC/DC converter solution that is suitable for many low-power applications. It is offered in a range of packages and pinouts, and can provide up to 400mA of continuous and 600mA of continuous output current. The solution uses a wide input voltage range from 85Vac to 305Vac and a constant on time (CT) operating control system. The operating frequency range is from 45kHz to 250kHz and the system efficiency is as high as 88%.

Application Field

The FSL306LRN is suitable for many low-power applications and is most commonly used in battery-operated or portable devices, such as mobile phones, cordless phones, media players, wearables, and other consumer and industrial systems. This device is also a suitable solution for supplying low-noise auxillary power in applications such as LCD panels, optical networks, industrial UPSs and automotive electronics. This device is also ideal for powering PoE systems, industrial automation components, LED lighting, and medical equipment.

Working Principle

The FSL306LRN is a constant on time (CT) operated converter. This type of topology can provide current-mode control using a transformer and an inductor. The transformer is used to couple the primary and secondary sides, and to isolate the input power source from the controller. A low voltage winding (LVW) is also provided, to supply bias voltage to the controller. The controller is responsible for providing pulse-width modulated (PWM) control signals to the FETs, enabling the charging and discharging of the inductor. The inductor acts as a low pass filter and provides the output load with filtered and regulated AC/DC power.

The FSL306LRN utilizes integrated protections such as over-temperature protection, over-current protection, over-voltage protection, and under-voltage protection. These protections help to provide reliable operation and extend the lifetime of the system. An external digital programming terminal is also provided, allowing users to program the system\'s operating parameters such as output voltage, output current, and frequency.

Conclusion

The FSL306LRN is an isolated, offline Flyback converter, high-efficiency AC/DC converter solution. It is suitable for many low-power applications and is most commonly used in battery-operated or portable devices, such as mobile phones, cordless phones, media players, wearables, and other consumer and industrial systems. This device uses a wide input voltage range from 85 Vac to 305 Vac and a constant on time (CT) operating control system. The operating frequency range is from 45kHz to 250kHz and the system efficiency is as high as 88%. An external digital programming terminal is also provided, allowing users to program the system\'s operating parameters such as output voltage, output current, and frequency.

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