LT3964EUHE#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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LT3964EUHE#TRPBF application field and working principle

LT3964EUHE#TRPBF is a monolithic high-voltage power management IC (PMIC), specifically designed to drive multiple High Efficient LEDs (HELs). It is a cost-effective solution for designers who want to develop lighting products. With its wide input voltage range, adjustable output current and internal thermal shut down, LT3964EUHE#TRPBF is a high performance device that ensures long term reliability for LED lighting applications

This device specifically falls into the PMIC - LED drivers category, which is becoming increasingly popular due to the ease-of-use, wide range of features and wide input voltage. LT3964EUHE#TRPBF is able to offer four constant-current outputs, each of which can be set to be between 100mA and 600mA. This allows designers to effectively address various power supply designs, from single or multiple cells up to high-voltage systems. Furthermore, LT3964EUHE#TRPBF allows up to 16 LEDs to be concurrently driven, making it suitable for applications with multiple LEDs, such as general lighting, spotlights and display backlighting. The device also offers comprehensive protection features, such as thermal protection and short-circuit protection, to limit the risk of electromechanical damage. The short-circuit protection ensures that if a short occurs on an output, the driver reacts quickly to prevent an uninterrupted rise in temperature. The thermal protection shuts down the device if an overtemperature is reached, guaranteeing safe LED operation and also allowing reset when the device temperature has fallen below the predetermined limit.

LT3964EUHE#TRPBF utilizes a current-mode switching technique to drive multiple LEDs. The advantage of using this type of techinique is that it allows the user to predict and control the output current precisely. The device operates in a PWM dim mode or an analog dim mode, which both feature an analog dim input that is used to adjust the output current dimming range. During PWM dim, the duty cycle of the dim signal is directly proportional to the maximum current of the output, which enables the user to precisely control the light intensity. The analog dim mode uses a DC voltage to adjust the output current and dimming range.The device also offers a boosted current accuracy mode, which allows the user to adjust the output current more accurately. During this mode, the voltage across the current sense resistor is tracked, allowing the output current to be accurately regulated. The boosted current accuracy mode also allows the output current to be trimmed to two decimal places, allowing even greater control of the LED current.

Overall, LT3964EUHE#TRPBF is a great choice for designers looking to develop LED lighting products, as it offers a wide range of features and comprehensive protection for safe LED operation. It is cost-effective and reliable, making it one of the best solutions for LED drivers in the PMIC - LED drivers category.

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