LT3491

所属类别：LED驱动
产品名称：采用 SC70 和 2mm x 2mm DFN 封装、具有集成肖特基二极管的白光 LED 驱动器
厂商：LT
生产批号：11+
封装：DFN
库存状态：有库存
库存量：10000
最低订购量：1
详细资料：

Product Introduction

The LT3491 is a white LED driver with an integrated Schottky diode in an SC70 and 2mm x 2mm DFN package

peculiarity Up to 6 white LEDs can be driven from a single 3V power supply High-end detection enables "single-wire current source" Internal Schottky diode Utilize a pin for dimming and shutdown functions 27V LED Open Circuit Protection 2.3MHz switching frequency ± 5% benchmark accuracy VIN range: 2.5V to 12V Only a 1μF output capacitor is required Wide True Color PWMTM dimming range of 300:1 8-pin SC70 package Flat 6-pin DFN package (2mm x 2mm x 0.75mm

description

®The LT 3491 is a fixed-frequency boost DC/DC converter designed to drive up to 6 tandem white LEDs from a single lithium-ion battery. The use of LED series provides equal LED current, resulting in uniform display brightness and eliminating the need for additional ballast resistors. The device uses a unique high-end LED current sense that allows it to act as a "single-wire current source"; One end of the LED string can be connected back to ground at any position, allowing for a simpler, single-wire LED connection. Traditional LED drivers use a ground resistor to sense the LED current, requiring a two-wire connection to the LED string.

The 2.3MHz switching frequency allows for the use of slim inductors and capacitors. A single pin performs shutdown and accurate LED dimming control. Minimal external components are required: LED open-circuit protection and Schottky diodes are integrated in a compact SC70 and 2mm x 2mm DFN package. With such a high level of integration, the LT3491 provides a high-efficiency LED driver solution with a minimal footprint.

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The ICs associated with the LT3491 include:

Model	Manufacturers	lot number	encapsulation	illustrate
ADM3491ARUZ	Analog Devices	15+	SMD	ADM3491ARUZ
ADM3491ARU	Analog Devices	15+	SMD	ADM3491ARU
ZT3491LEEN	Zywyn Corporation	15+	SMD	ZT3491LEEN
ADM3491ARZ-REEL	Analog Devices	15+	SMD	ADM3491ARZ-REEL
ISL83491IB	Intersil	15+	SMD	ISL83491IB
MAX3491EESA	Maxim Integrated	15+	SMD	MAX3491EESA
MAX3491ECSA	Maxim Integrated	15+	SMD	MAX3491ECSA
MAX3491CSA	Maxim Integrated	15+	SMD	MAX3491CSA
MAX3491ESA	Maxim Integrated	15+	SMD	MAX3491ESA
ADM3491EARZ	Analog Devices	15+	SMD	ADM3491EARZ
SP3491CN-L/TR	XR	15+	smd	New original imported integrated circuit
LT3491	LT	11+	DFN	White LED driver with integrated Schottky diode in SC70 and 2mm x 2mm DFN package
SP3491CN-L	NXP	10+		+3.3V Low Power Full Duplex RS-485 Transceivers with 10Mbps Data Rate
SP3491CN	SIPEX	10+11+	SOP8	Hong Kong spot, imported original
MAX3491EESD+T	MAXIM	10+11+	SOP16	Hong Kong spot, imported original
MAX3491CSD	MAXIM	10+11+	SOP14	Hong Kong spot, imported original
LM34910SD/NOPB		10+11+		Hong Kong spot, imported original
ISL83491IBZ	INTERSIL	10+	N/A	Brand new original import, Hong Kong spot
LM34914SD	NSC	10+11+	LLP-10	The ultra-compact 1.25A step switching regulator features intelligent current limiting
LM34917ATLX	NSC	10+	TSSOP14	High voltage 1A step-down switching regulator

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