LT3756EMSE#PBF

Series:	--
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	DC DC Controller
Topology:	Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost)
Internal Switch(s):	No
Number of Outputs:	1
Voltage - Supply (Min):	6V
Voltage - Supply (Max):	100V
Voltage - Output:	100V
Current - Output / Channel:	--
Frequency:	100kHz ~ 1MHz
Dimming:	Analog, PWM
Applications:	--
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	16-TFSOP (0.118", 3.00mm Width) Exposed Pad
Supplier Device Package:	16-MSOP-EP
Base Part Number:	LT3756

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Application field and working principle of LT3756EMSE#PBF

PMIC - LED Drivers have recently become a popular choice for applications that require the control and regulation of electrical currents or voltages. One such product is the LT3756EMSE#PBF, which is an integrated power management, current regulation, and safety control IC for LED driver applications.The LT3756EMSE#PBF is a highly efficient, high-voltage/high-current, full-featured PMIC with controller loop outputs. It is comprised of two independently controlled, identical DC/DC converters, one preset to operate in buck mode and the other preset to operate in buck-boost mode.The LT3756EMSE#PBF is designed to provide a power supply for LED lighting applications such as in automobile traffic signals, dome lighting fixtures, automotive headlamps, industrial lighting diagrams, and many other applications. Its special output current and voltage characteristics make it suitable for controlling multiple parallel LEDs, where each group of current-controlled LEDs demands different voltage levels.The LT3756EMSE#PBF features a summing circuit which sums the output current of the two converters to obtain a single, unified output current. This current can be used as the reference current of the two converters, so that the cascading current sharing effect can make each LED output a constant current.In order to control the output voltage and current of the two converters, the LT3756EMSE#PBF uses a series of analog and digital control circuitry. The device uses its integrated external FETdrive stage in order to accurately control the buck and buck-boost converters. This FETdrive stage can drive high-side N-channel MOSFETs or low-side P-channel MOSFETs with low total gate charge, which minimizes switching losses in buck and buck-boost operation.In addition to its converter control capabilities, the LT3756EMSE#PBF also incorporates advanced analog circuitry for dimming or brightness control of the LED load. The control contains a built-in high frequency oscillator, which creates a square wave signal with variable duty cycle and amplitude. This signal can be further shaped by adjustable, electronic pulse-width modulation (PWM) dimming.The LT3756EMSE#PBF also has comprehensive algorithms for protection and fault detection, including an adjustable line voltage brown-out protector, a frequency monitor to prevent over-clocking, an adjustable overtemperature warning and shutoff circuit, a maximum output current limiting circuit, and an output short circuit protector.With its superior efficiency ratings and highly flexible features, the LT3756EMSE#PBF is an ideal choice for regulating and controlling current and voltage levels in a variety of LED driver applications. Its combination of advanced analog and digital circuitry and its range of protection algorithms make it suitable for a variety of applications, from automotive headlamps and traffic signals to industrial lighting fixtures and more.

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