LT3519EMS-1#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:	1MHz
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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Introducing LT3519EMS-1#TRPBF

LT3519EMS-1#TRPBF is a high precision power management Integrated Circuit (PMIC) from Linear Technology that is specifically designed to provide highly efficient and high density LED driver solutions for optoelectronic applications. It is a monolithic solution that features adjustable switching frequencies (up to 500kHz), wide input voltage operations (from 4.75V up to 200V), low noise and tight LED-matching of up to 98%. It is also offered in a thermally enhanced 16-lead MLP surface mount package that is Pb-free and RoHS compliant. LT3519EMS-1#TRPBF is part of the LT3519 family of PMICs, which is designed to provide simple management and control of a single channel LED Driver.

LT3519EMS-1#TRPBF Application field

LT3519EMS-1#TRPBF’s high level of efficiency and low input ripple make it well-suited for driving a wide range of single channel LEDs for a variety of applications including battery-powered applications, automotive applications, medical equipment, retail displays, LCD projectors, cell phone frontlighting and other high-brightness LED applications. Its wide input voltage range and low noise features make it an ideal solution for both general purpose portable applications and automotive applications. LT3519EMS-1#TRPBF is a highly efficientLED driver that can provide uniform brightness regulation over the entire dimming range by self-adjusting its internal loop gain based on attributes such as the temperature of the part. Its integrated current sense functions enable it to compensate for variations in LED brightness due to environmental factors such as changes in ambient temperature. Its advanced control loops also continually monitor input voltage ripple, switching frequency and output current to ensure steady LED performance.

LT3519EMS-1#TRPBF Working Principle

The LT3519EMS-1#TRPBF is based on a synchronous fixed frequency, pulse width modulation (PWM) high precision LED driver. It operates on the principle of controlling the load current by varying either the duty cycle or the switching frequency. In the LT3519EMS-1#TRPBF, a high-performance switch is used to incorporate both features. It ensures improved efficiency and performance, while simplifying the design process. The pulse width modulation technique used in the LT3519EMS-1#TRPBF is based on a non-overlap constant frequency drive and is able to provide higher accuracy and efficiency, while reducing the line and load current ripple. The switching frequency, on the other hand, is adjustable through both the external component selection and board layout. This makes the LT3519EMS-1#TRPBF an ideal solution for applications where high efficiency and low noise are desired. The LT3519EMS-1#TRPBF is capable of operating with a single input voltage source, hence providing a compact solution for driving a single LED or multiple LEDs. It is also capable of driving an inductive step-down DC-to-DC converter for applications with multiple string LEDs. The LT3519EMS-1#TRPBF provides an integrated short-circuit protection and thermal shutdown function, hence providing user-friendly operation with less external components.

Conclusion

The LT3519EMS-1#TRPBF is a high-precision PMIC designed to provide effective and efficient single-channel LED driver solutions for optoelectronic applications. It is a good solution for applications where efficiency and low noise are desired, due to its adjustable switching frequencies and wide input voltage capabilities. It is a monolithic solution that features an adjustable switching frequency, wide input voltage operations and low noise levels, enabling uniform brightness regulation over the entire dimming range with the help of its integrated current sense function. Its advanced control loops also ensure steady LED performance. This makes it an ideal solution for a wide range of single channel LED applications, such as battery-powered applications, automotive applications, medical equipment, retail displays, LCD projectors, cell phone frontlighting and other high-brightness LED applications.

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