LT3909EDD#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	DC DC Regulator
Topology:	Step-Up (Boost)
Internal Switch(s):	Yes
Number of Outputs:	2
Voltage - Supply (Min):	2.9V
Voltage - Supply (Max):	40V
Voltage - Output:	40V
Current - Output / Channel:	50mA
Frequency:	2MHz
Dimming:	Analog, PWM
Applications:	Automotive
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	12-WFDFN Exposed Pad
Supplier Device Package:	12-DFN (3x3)
Base Part Number:	LT3909

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PMIC - LED Drivers: LT3909EDD#TRPBF Application Field and Working PrincipleThe LT3909EDD#TRPBF is a 6-channel high-side dimmable LED driver that is designed specially for lighting applications and provides excellent performance and reliability. This driver has a wide operating range and uses a low-voltage buck-boost controller that operates from input voltages of 6V to 24V and is able to output up to 18V maximum.The LT3909EDD#TRPBF is extremely versatile and can be used in any application requiring illumination, such as automotive and seismic applications. It is also extremely flexible and can be combined with hardware such as buttons, dimmers, and controllers to give users full control over the LED lighting application. The driver also features non-dimming and pulsed dimming modes, allowing it to be used in applications where dimming requirements are low.The LT3909EDD#TRPBF is especially useful in applications where long-life and reliability are key, as it features a built-in Diagnostic Over Voltage Protection (DOV) circuit that protects the system from input overvoltage conditions such as battery outages or surges. Furthermore, the driver has integrated over-temperature protection and open circuit protection to protect both the LEDs and the driver itself.The LT3909EDD#TRPBF also offers short-circuit and open-lamp protection to ensure the LED driver and the application are safe. It also features an integrated output-inhibit pin that allows the user to switch off the output voltage to the LEDs in order to turn off the application. This can be beneficial in both safety and power saving applications.The LT3909EDD#TRPBF driver has a proprietary current regulation technology that helps maintain consistent current across all channels and provides accurate dimming performance. This technology also helps improve efficiency by limiting current ripple, which results in improved light quality and higher power efficiency.The working principle of the LT3909EDD#TRPBF is relatively simple. The device consists of a microcontroller, a power switch, and an inductor. The microcontroller is responsible for controlling the timing of the power switch and for maintaining the drive current to the LEDs. This is done by using a reference voltage, which is set by the user, and a feedback loop that checks the output of the power switch. When the feedback voltage exceeds the reference voltage the power switch turns off, preventing the power from flowing to the LEDs and thereby providing dimming.The LT3909EDD#TRPBF driver is a versatile and reliable device that offers excellent performance in lighting applications. It is suitable for a wide range of applications and can combine with other hardware to give users full control over the LED lighting application. With its powerful and reliable features, this device is ideal for automotive, seismic, and any other application where long-life and accuracy are key requirements.

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