Datasheet Linear Technology LT3741

Manufacturer	Linear Technology
Series	LT3741

High Power, Constant Current, Constant Voltage, Step-Down Controller

Datasheets

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PDF, 639 Kb, Language: en, File uploaded: Mar 27, 2018, Pages: 24
High Power, Constant Current, Constant Voltage, Step-Down Controller

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Prices

Packaging

	LT3741EFE#PBF	LT3741EFE#TRPBF	LT3741EUF#PBF	LT3741EUF#TRPBF	LT3741IFE#PBF	LT3741IFE#TRPBF	LT3741IUF#PBF	LT3741IUF#TRPBF
N	1	2	3	4	5	6	7	8
Package	TSSOP-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing	4x4 QFN-20 Package Outline Drawing	4x4 QFN-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing	4x4 QFN-20 Package Outline Drawing	4x4 QFN-20 Package Outline Drawing
Package Code	FE	FE	UF	UF	FE	FE	UF	UF
Package Index	05-08-1663 (CB)	05-08-1663 (CB)	05-08-1710	05-08-1710	05-08-1663 (CB)	05-08-1663 (CB)	05-08-1710	05-08-1710
Pin Count	20	20	20	20	20	20	20	20

Parametrics

Parameters / Models	LT3741EFE#PBF	LT3741EFE#TRPBF	LT3741EUF#PBF	LT3741EUF#TRPBF	LT3741IFE#PBF	LT3741IFE#TRPBF	LT3741IUF#PBF	LT3741IUF#TRPBF
Architecture	Average Output Current Control	Average Output Current Control	Average Output Current Control	Average Output Current Control	Average Output Current Control	Average Output Current Control	Average Output Current Control	Average Output Current Control
Demo Boards	DC1602A	DC1602A	DC1602A	DC1602A	DC1602A	DC1602A	DC1602A	DC1602A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Dimming	External Circuit	External Circuit	External Circuit	External Circuit	External Circuit	External Circuit	External Circuit	External Circuit
Export Control	no	no	no	no	no	no	no	no
Features	Output Current Regulation, Resistor Set Frequency, External Synchronization	Output Current Regulation, Resistor Set Frequency, External Synchronization	Output Current Regulation, Resistor Set Frequency, External Synchronization	Output Current Regulation, Resistor Set Frequency, External Synchronization	Output Current Regulation, Resistor Set Frequency, External Synchronization	Output Current Regulation, Resistor Set Frequency, External Synchronization	Output Current Regulation, Resistor Set Frequency, External Synchronization	Output Current Regulation, Resistor Set Frequency, External Synchronization
Frequency, kHz	1000	1000	1000	1000	1000	1000	1000	1000
Ishutdown, µA	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Isupply, mA	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8
Max Number of LEDs	10	10	10	10	10	10	10	10
Monolithic	no	no	no	no	no	no	no	no
Number of Outputs	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	25	25	25	25	25	25	25	25
Switch Current, A	25	25	25	25	25	25	25	25
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes
Topology	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver
Vin Max, V	36	36	36	36	36	36	36	36
Vin Min, V	6	6	6	6	6	6	6	6
Vout Max, V	34	34	34	34	34	34	34	34

Eco Plan

	LT3741EFE#PBF	LT3741EFE#TRPBF	LT3741EUF#PBF	LT3741EUF#TRPBF	LT3741IFE#PBF	LT3741IFE#TRPBF	LT3741IUF#PBF	LT3741IUF#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Other Options

LT3741-1 LT3741-1

Articles

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Accurate Constant-Current, Constant-Voltage 20A Power Supply Ensures Safe Charging of Supercaps and Li-Ion Batteries &mdash LT Journal
PDF, 974 Kb, File published: Oct 27, 2010
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design features Accurate Constant-Current, Constant-Voltage
20A Power Supply Ensures Safe Charging of
Supercaps and Li-Ion Batteries
Josh Caldwell Many applications require a power supply that can
accurately regulate a voltage and accurately limit output
current, but there are remarkably few solutions that can
do both with a single IC. System designers must typically
trade off accuracy in one feature for accuracy in the
other by choosing between a high gain, high accuracy
voltage regulator with a crude current limit or a high
accuracy current regulator with a crude voltage clamp. SINGLE-CELL LITHIUM-ION
BATTERY CHARGER PROVIDES
10A OF CHARGING CURRENT Safety concerns and thermal limitations
of charging lithium-ion batteries mean
the charger must be able to carefully
control charging currents and voltages.
Ideally, a microcontroller can accurately
throttle back the charging current during
the initial and top-off charging phases.
This forces the use of a current regulation scheme that has precision adjustable
current control, thermal limiting capabilities, and an accurate voltage limit. The LTВ®3741 simplifies the design of
constant-current, constant-voltage regulators by combining an accurate current
regulator and an accurate voltage regulator in a single IC, thus eliminating power …

Model Line

Series: LT3741 (8)

LT3741EFE#PBF LT3741EFE#TRPBF LT3741EUF#PBF LT3741EUF#TRPBF LT3741IFE#PBF LT3741IFE#TRPBF LT3741IUF#PBF LT3741IUF#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > External Power Switch Buck Controllers
Power Management > LED Driver ICs > Step-Down (Buck) LED Drivers