IR2520DSPBF

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The IR2520DSPBF is an integrated circuit that belong to PMIC - Lighting, Ballast Controllers. This device is a 1A constant-current, selectable peak-current-limit LED driver suitable for driving LEDs in constant-current applications. The device contains two selectable peak-current-limit settings of approximately 120mA for one LED or 450mA for two LEDs.

IR2520DSPBF can be used in multiple applications when paired with external power MOSFETs, such as LED lighting control, ballast lighting control and other constant current applications that have a need to limit the current levels offered by the LED. IR2520DSPBF has low quiescent current that allows very low power consumption. The long LED lifecycle, precision current regulation at the LED, and easy programming are some of the advantages that make this device suitable for these applications.

The basic working principle of IR2520DSPBF is quite simple. It is a linear regulator that works on the principle of voltage control. It takes input voltage and compares it with a reference voltage and produces a corresponding error signal. An amplifier is then used to amplify this error signal and used to drive the external power MOSFET. This helps to adjust the current limit rating of the device, thereby allowing the device to maintain a constant current output.

The IR2520DSPBF is ideal for applications that require a low power current source suitable for single to multiple LEDs. The device enables for both single and two-channel constant-current LED applications with a low quiescent current, thus leaving the maximum amount of power for the LEDs. The device provides a selectable peak current limit setting of 120mA for single LED or 400mA for dual LED. It also has an accurate output current path and adjustable peak current limit, allowing precise adjustment of the wanted current level.

When using the IR2520DSPBF with external power MOSFETs, the device can be used to control the brightness of the LED. The external power MOSFETs can be adjusted to limit the current output of the LEDs to the desired level. It enables accurate control of current and voltage levels, resulting in consistent and reliable LED performance. The device is also suitable for colour mixing applications due to the accurate control of the LED current.

Additionally, IR2520DSPBF provides an adjustable low voltage start-up, which enables the device to be enabled at a specific voltage level. This reduces the energy consumption as the LED does not require to be powered at full power before the device starts working. It also enables efficient multi-LED start-up and protection from overloading and short-circuiting.

In conclusion, IR2520DSPBF is an ideal device for driving single to multiple LEDs for various application fields such as LED lighting control, colour mixing and more. The device can be used with external power MOSFETs to enable precise LED current control and efficient start-up.

The device also has other features such as adjustable peak current limit, low quiescent current, low voltage start-up, and overloading and short-circuiting protection, making it an ideal choice for LED applications.

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