LT3519IMS-2#TRPBF

Voltage - Output:	--
Base Part Number:	LT3519
Supplier Device Package:	16-MSOP
Package / Case:	16-TFSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Applications:	Lighting
Dimming:	Analog, PWM
Frequency:	2.2MHz
Current - Output / Channel:	750mA (Switch)
Series:	--
Voltage - Supply (Max):	30V
Voltage - Supply (Min):	3V
Number of Outputs:	1
Internal Switch(s):	Yes
Topology:	SEPIC, Step-Down (Buck), Step-Up (Boost)
Type:	DC DC Regulator
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

LT3519IMS-2#TRPBF is a LED Driver, which is a part of Power Management Integrated Circuit (PMIC). It is a highly integrated LED driver that provides 7 channels for current control and steady state current regulation, enabling linear dimming and color control. It operates from 5V to 40V power supply, saving power loss and saving cost by eliminating the need for costly data DC-DC converters. This integrated circuit is also used to provide constant light output from LEDs, irrespective of input voltage or temperature fluctuations. It is also used to support various output configurations like single-ended, multiplexed and pulse-width-modulated (PWM).

Application Areas

LT3519IMS-2#TRPBF is ideally suited for automotive, general-purpose, and industrial applications requiring high power, constant voltage and wide input voltage range. It is used for LED backlight applications in television, signage, automotive, retail, etc. It is also used for LED lighting applications used in various home and commercial lighting systems. Furthermore, it is used in medical equipment like ambulatory monitors that monitor patients’ vital signs or dental drills and equipment that use LED light sources which require constant light output to operate correctly. It is also used in LED pixel-mapping applications which require precise color control and linear dimming.

Working Principle

The working principle of LT3519IMS-2#TRPBF is based on the principle of current control, wherein the current is regulated according to a given voltage mode. The integrated circuit uses an internal reference voltage to compare the output voltage set by the user. When the input voltage is applied, the output of the circuit will increase in proportion to the value of the reference voltage. This results in the output voltage corresponding to the set current given the power supply and its corresponding input voltage. The LT3519IMS-2#TRPBF can also be configured for constant-current operation by adjusting the gain of the amplifier. Another feature of the LT3519IMS-2#TRPBF is its ability to monitor the temperature of the output power device. This helps to ensure that the output voltage provided is always within the range of specified limits.

The LT3519 also uses an on-chip startup circuit. This is used to provide an adjustable soft-start time when the power supply is initially applied, to ensure that the output power device starts up cleanly. This is especially useful for high-power applications that require a soft start to ensure the best possible performance. Finally, the LT3519IMS-2#TRPBF provides a current limit protection, which protects the circuit from over-current conditions.

Conclusion

The LT3519IMS-2#TRPBF integrated circuit is a versatile, high-performance power management device designed to provide constant voltage and current control in a variety of applications. It is capable of driving output currents up to 2A with 7 channels for current control and steady-state current regulation. Its wide input voltage range and precise current regulation help to ensure constant light output from LEDs and pixel-mapping applications. Additionally, its startup circuit and current limit protection help it to protect itself from possible damages due to over voltage or over current conditions. The LT3519IMS-2#TRPBF is an ideal choice for applications requiring constant voltage and reliable current control.

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