LT3755IMSE-1#PBF

Voltage - Output:	75V
Base Part Number:	LT3755
Supplier Device Package:	16-MSOP-EP
Package / Case:	16-TFSOP (0.118", 3.00mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Applications:	--
Dimming:	Analog, PWM
Frequency:	100kHz ~ 1MHz
Current - Output / Channel:	--
Series:	--
Voltage - Supply (Max):	40V
Voltage - Supply (Min):	4.5V
Number of Outputs:	1
Internal Switch(s):	No
Topology:	Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost)
Type:	DC DC Controller
Part Status:	Active
Packaging:	Tube

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Introduction

The LT3755IMSE-1#PBF is a highly efficient, low power LED Driver from Linear Technology that is part of the PMIC - LED Drivers family. This highly efficient LED driver allows for dimming LED backlights or LED applications. The LT3755IMSE-1#PBF was designed to simplify driving LEDs that have a wide range of variable brightness and color temperatures while still providing a great deal of flexibility.

Application Fields

The LT3755IMSE-1#PBF is ideally suited for dimmable LED lighting applications including backlighting, monitors, televisions, lighting fixtures, displays, and signage. It is also suitable for indoor or outdoor applications due to its efficiency and low quiescent current, meaning it can operate in extreme temperatures. Its flexibility allows it to be used in a wide range of lighting management applications such as daylight harvesting, occupancy and motion sensors, and demand response. The LT3755IMSE-1#PBF is also ideal for automotive lighting applications including headlamps, headlights, fog lights, brake lights, and interior lighting. It is designed to meet the stringent automotive industry standards for power, durability, and safety. The LT3755IMSE-1#PBF can also be used in industrial applications such as robotics, refrigeration, and vending machines.

Advantages

The LT3755IMSE-1#PBF offers a host of advantages over other LED drivers. It features reverse polarity protection, short circuit protection, and over voltage protection, which makes it a reliable and safe driver for your LED lighting application. It also offers device flexibility, allowing customers to choose the optimal LED current and also select the desired boost topology. The LT3755IMSE-1#PBF also features adjustable peak current and internal soft start, which helps reduce EMI while providing dimming performance.Additionally, the LT3755IMSE-1#PBF is a low profile LED driver, meaning it can be used in a wide range of applications where space is limited. It is also extremely efficient, with a peak efficiency of up to 97%, and an ultra-low quiescent current of just 2.7 μA. Finally, the LT3755IMSE-1#PBF also offers comprehensive dimming performance and high saturation ripple immunity, making it ideal for dimmable applications.

Working Principle

The LT3755IMSE-1#PBF is a step-up LED driver for linear LED dimming. It is designed to produce a regulated LED current from a supply voltage of 4.5V to 45V. The LT3755IMSE-1#PBF features an Adjustable Peak Current option, allowing customers to select an optimal peak LED current. The output voltage is determined by the input voltage and output current, as specified by the appropriate selection of inductor and resistor values. The LT3755IMSE-1#PBF also features an Internal Soft-Start option, allowing customers to adjust the soft start time, thus preventing power spikes at startup while also reducing EMI. The device further features a three-level protection system including short circuit protection, over voltage protection, and reverse polarity protection.

Conclusion

The LT3755IMSE-1#PBF is a reliable and highly efficient LED driver from Linear Technology. It is designed specifically for dimmable LED lighting applications and automotive lighting applications. It offers flexibility, adjustable peak current, and internal soft start, making it ideal for difficult dimming applications. Furthermore, the LT3755IMSE-1#PBF also offers comprehensive protection, reverse polarity protection, short circuit protection, and over voltage protection. Finally, its low quiescent current and high efficiency make it an ideal choice for applications that require a low profile driver.

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