LP3944ISQX

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

LP3944ISQX belong to a PMIC - LED drivers family. It is a high efficiency, simple to use, and adjustable LED driver. The device can reduce the power consumption of a variety of low-, medium- and high-power LED applications, simplifying the design of compact power supply for LED lighting systems.

Introduction of LP3944ISQX

LP3944ISQX is a dual-channel electronic current regulator that can drive up to 200 mA of current and has maximum output voltage of 25V. It offers flexibility through current regulation and dimming control, supports wide operating voltage range, and offers high efficiency up to 90%. It is available in a very small and low profile WLP-14 package.

Application field and features of LP3944ISQX

LP3944ISQX has various applications, such as LED lighting systems with AC, DC, Lithium ion battery, USB and other sources, LED displays, indicator panels, and automotive, medical and sensing applications. It offers the following features:

• Wide operating voltage range: from 6V to 25V
• Supports up to two channels for dual-channel current regulation
• Output current up to 200mA per channel
• High Efficiency up to 90%
• Low operating current: 2.5 mA
• Two dimming control modes: OpenLoop and ClosedLoop
• Internal thermal and short circuit protection
• AV input up to 25V

Working principle of LP3944ISQX

The LP3944ISQX works based on the concept of current regulation. It uses two channels of feedback operational amplifiers in order to regulate the current through a LED. The device operates using two main components: the main oscillator, and the dimming loop controller. The main oscillator produces a fixed frequency signal, which is fed to the dimming loop controller. The dimming loop controller modulates the frequency of the first oscillator and passes voltage signals through current regulation and pulse width modulation (PWM). Each channel can be programmed to set particular desired levels of current up to 200mA, while maintaining the average light power output above the given current or below.

Moreover, the LP3944ISQX can be configured to operate in two modes: open-loop and closed-loop. In the open-loop mode, the LED current is regulated by changing the switching frequency. However, in the closed-loop mode, the LED current is regulated by varying the gain of the feedback loop. It ensures that the LED brightness remains constant irrespective of the input voltage or LED temperature.

Conclusion

In conclusion, LP3944ISQX is an advanced device from PMIC - LED drivers family. It is a flexible and efficient device that can be used to drive up to 200mA of current with an output voltage of 25V. Its wide operating voltage range and high efficiency make it suitable for many applications, such as LED lighting systems, LED displays, indicator panels, and automotive, medical and sensing applications. Moreover, It has two modes of dimming control, OpenLoop and ClosedLoop which will help to keep the LED brightness constant.

The specific data is subject to PDF, and the above content is for reference