LM3561TMX/NOPB Integrated Circuits (ICs)

Voltage - Output:	--
Base Part Number:	LM3561
Supplier Device Package:	12-µSMD (1.22x1.62)
Package / Case:	12-WFBGA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Applications:	Camera Flash
Dimming:	I²C
Frequency:	2MHz
Current - Output / Channel:	600mA (Flash)
Series:	--
Voltage - Supply (Max):	5.5V
Voltage - Supply (Min):	2.5V
Number of Outputs:	1
Internal Switch(s):	Yes
Topology:	Step-Up (Boost)
Type:	DC DC Regulator
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LM3561TMX/NOPB Application Field and Working Principle

PMIC (power management integrated circuits) - LED drivers are specialized integrated circuits used to control the luminosity of a single or array of LEDs. They provide an alternative to active components such as resistors and capacitors, lessening the number of separate components necessary to achieve a given brightness in an LED. One the most advanced devices in the field of PMIC-LED drivers is the LM3561TMX/NOPB. The following will discuss its application field and working principle.

The Application Field of LM3561TMX/NOPB

The LM3561TMX/NOPB LED driver is ideally suited for a variety of LED applications in consumer, industrial, and automotive systems. Due to its high frequency integrated pulse width modulation (PWM) dimming capability, it makes it particularly ideal for cell phones and other portable devices. The device also provides carefully regulated current to a single or multi-channel LED array.The LM3561TMX/NOPB is designed to operate over a range of voltage and frequencies, making it well-suited for a broad range of LED lighting applications. It has integrated near-doubling circuits to allow maximum LED brightness with fewer components, while also providing a high switching frequency to minimize fan-noise and LED flicker. The LED driver also features integrated LED fault protection, which includes open LED detection, continuous LED shortcircuit protection and over temperature protection.

The Working Principle of LM3561TMX/NOPB

The LM3561TMX/NOPB LED driver is based on a switching regulator architecture which contains an integrated PWM dimmer. The circuit makes use of voltage feedback as input to control the current flow to the LED. In normal operating mode, the PWM signal is used to regulate the current that is provided to the LED. The PWM frequency is then determined by the user and is adjustable with a potentiometer.In order to ensure the desired current flow to the LED, the sensed output current is compared to a reference current and the PWM signal is generated to match the two values. The current is then regulated based on the difference between the two currents. This type of feedback control ensures that the output current matches the desired level.Additionally, the LM3561TMX/NOPB features user-adjustable open/short circuit protection and near-doubling current flow capabilities, enabling optimum brightness with fewer components. In addition, there are also adjustable over-temperature protection settings, allowing the user to set their own level of protection for the LED array.

Conclusion

The LM3561TMX/NOPB is a very advanced, efficient and compact LED driver device, offering a comprehensive range of features for a variety of LED applications. Its integrated near-doubling circuits, adjustable temperature protection settings and feedback controlled current regulation makes it an ideal choice for a variety of LED lighting systems.

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