LT3791HFE#PBF

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Analog Devices

60V 4-SWITCH SYNCHRONOUS BUCK-BOOST LED DRIVER CONTROLLER

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LT3791HFE#PBF

Active

Analog Devices

60V 4-SWITCH SYNCHRONOUS BUCK-BOOST LED DRIVER CONTROLLER

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DocumentsR518 Reliability Data Datasheet

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Technical Specifications

Parameters and characteristics for this part

Specification	LT3791HFE#PBF

Applications	Lighting
Dimming	Analog, PWM
Frequency [Max]	700 kHz
Frequency [Min]	200 kHz
Internal Switch(s)	False
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-40 °C
Package / Case	38-TFSOP
Supplier Device Package	38-TSSOP-EP
Topology	Step-Down (Buck), Step-Up (Boost)
Type	DC DC Controller
Voltage - Output [Max]	60 VDC
Voltage - Output [Min]	0 VDC
Voltage - Supply (Min) [Min]	4.7 V

LT3791 Series

60V 4-Switch Synchronous Buck-Boost LED Driver Controller

Part	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Frequency [Min]	Frequency [Max]	Package / Case	Applications	Grade	Type	Supplier Device Package	Mounting Type	Voltage - Output [Max]	Voltage - Output [Min]	Voltage - Supply (Min) [Min]	Number of Outputs	Dimming	Frequency - Switching [Max]	Frequency - Switching [Min]	Output Configuration	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Output Phases	Output Type	Control Features	Function
Analog Devices LT3791HFE	150 °C	-40 °C	Step-Down (Buck) Step-Up (Boost)	200 kHz	700 kHz	38-TFSOP	Lighting	Automotive	DC DC Controller	38-TSSOP-EP	Surface Mount	60 VDC	0 VDC	4.7 V	1	Analog PWM
Analog Devices LT3791HFE#PBF	150 °C	-40 °C	Step-Down (Buck) Step-Up (Boost)	200 kHz	700 kHz	38-TFSOP	Lighting		DC DC Controller	38-TSSOP-EP	Surface Mount	60 VDC	0 VDC	4.7 V	1	Analog PWM
Analog Devices LT3791IFE-1	125 °C	-40 °C	Buck-Boost			38-TFSOP				38-TSSOP-EP	Surface Mount				2		700 kHz	200 kHz	Positive	4.7 V	60 V	2	Transistor Driver	Enable Frequency Control Soft Start	Step-Up/Step-Down
Analog Devices LT3791EFE#PBF	125 ¯C	-40 °C	Step-Down (Buck) Step-Up (Boost)	200 kHz	700 kHz	38-TFSOP	Lighting		DC DC Controller	38-TSSOP-EP	Surface Mount	60 VDC	0 VDC	4.7 V	1	Analog PWM

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 16.48
		10	$ 11.83
		25	$ 10.63
		100	$ 9.30
		250	$ 8.65
		500	$ 8.26
		1000	$ 8.19

Description

General part information

LT3791 Series

The LT3791 is a synchronous 4-switch buck-boost LED driver controller. The controller can regulate LED current up to 52V of LED string with input voltages above, below, or equal to the output voltage. The constant-frequency, forced-continuous current mode architecture allows its frequency to be adjusted or synchronized from 200kHz to 700kHz. No top MOSFET refresh switching cycle is needed in buck or boost operation. With 60V input, 60V output capability and seamless transitions between operating regions, the LT3791 is ideal for LED driver applications in automotive, industrial, and even battery-powered systems.For new designs we recommend the LT8391: 60V synchronous 4-switch, buck-boost LED controller due to its numerous performance improvements over the LT3791.FeaturesLT3791OPEN LED PinLT3791-1Replaces OPEN LED Pin With C/10 Pin Termination FlagApplicationsAutomotive Head Lamps/Running LampsGeneral Purpose Lighting