LT3964IUHE#TRPBF

Voltage - Output:	--
Base Part Number:	LT3964
Supplier Device Package:	36-QFN (6x5)
Package / Case:	36-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Applications:	Automotive, General Purpose, Industrial, Medical
Dimming:	I²C, PWM
Frequency:	2MHz
Current - Output / Channel:	--
Series:	--
Voltage - Supply (Max):	36V
Voltage - Supply (Min):	4V
Number of Outputs:	2
Internal Switch(s):	Yes
Topology:	Step-Down (Buck)
Type:	DC DC Controller
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LT3964IUHE#TRPBF Application Field and Working PrinciplePMIC – LED Drivers Although light-emitting diode (LED) lighting has been around for some time, the emergence of energy efficient LED lighting systems has seen it emerge as a viable alternative for many commercial, residential and industrial lighting applications. Driven by PMIC (Power Management Integrated Circuit) LED drivers, LED lighting can be designed and deployed to light-emitting diode a specific quality and intensity of light.LT3964IUHE#TRPBF is one such driver IC and is an ideal choice for designers working on general lighting applications. It integrates a precision and simple high-voltage dimming control, as well as having good efficiency, providing small solution size and good EMI (electro-magnetic interference) performance all in one package. Principle Overview The LT3964IUHE#TRPBF is an adaptive high-voltage controller and operates on a DC supply between 13V and 140V. This power supply can be used to drive a WLED string in the application circuit. The IC is based on a versatile charge pump with a fixed frequency oscillator that works with a feedback control loop and adaptive dimming across all conditions to ensure the efficiency is maintained regardless of line and load changes.Application The LT3964IUHE#TRPBF is used in various applications such as Low-power LED lighting, Applications with a power supply voltage range as high as 140V, and lighting applications that require excellent EMI performance. It is also used in general lighting applications such as recessed downlighting and decorative lighting.Working Principles The LT3964IUHE#TRPBF is designed to drive a WLED (White Light Emitting Diode) string in the application circuit. The WLED string is connected to the IC through the two outputs A&B. The output voltage of the IC is adjustable through the external dimming network. The IC works on a fixed frequency of 2.3MHz and its output voltage is adjustable. It is a robust design as it is integrated with an adaptive dimming control loop that ensures consistent performance even in presence of certain external conditions such as line and load changes.Protection Features The IC is equipped with various protection features to ensure durability. This includes open LED and short LED protection, which enables the IC to detect the number and type of LED connected to it and provide the appropriate protection. It also has thermal protection that prevents the IC from operating beyond a certain temperature. Short circuit protection is also available, which prevents current overload. Conclusion The LT3964IUHE#TRPBF is a robust and powerful IC, providing small solution size and good EMI performance. It integrates a precision and simple high-voltage dimming control with an adaptive dimming control loop and excellent efficiency. This makes it an ideal choice for general lighting applications such as recessed downlighting and decorative lighting.

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