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LCNZ

更新时间： 2022-12-17 09:22:14

品牌	Logo	应用领域
凌特 - Linear		驱动器
页数	文件大小	规格书
16页	216K
描述
48V Buck Mode LED Driver in SC70 and 2mm x 2mm DFN

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LCNZ 数据手册

LT3590

48V Buck Mode

LED Driver in SC70

and 2mm x 2mm DFN

DESCRIPTION

FEATURES

The LT^®3590 is a ﬁxed frequency buck mode converter

speciﬁcally designed to drive up to 10 LEDs in series from

a 48V DC source. Series connection of the LEDs provides

identical LED currents of up to 50mA, resulting in uniform

brightness and eliminating the need for ballast resistors.

A ﬁxed frequency, current mode architecture results in

stable operation over a wide range of input voltage and

output voltage.

■

4.5V to 55V Input Voltage Range

■

Up to 50mA LED Current

■

80mA, 55V Switch

Internal Schottky Diode

15μA Supply Current in Shutdown

■

500μA Supply Current Operating, Not Switching

■

Switching Frequency: 850kHz

■

200mV Feedback Voltage with 5ꢀ Accuracy

■

CTRL Input Performs Dimming and Shutdown

The high switching frequency of 850kHz permits the use

of tiny, low proﬁle inductors and capacitors. A single pin

performs both shutdown and accurate LED dimming

control. The power switch, Schottky diode and control

circuitry are all contained inside a space saving SC70

package or 2mm × 2mm DFN package to allow a small

converter footprint and lower parts cost.

■

91ꢀ Efﬁciency (10 LEDs, 50mA)

■

Requires Only 1μF Output Capacitor

■

8-Lead SC70 Package

■

6-Lead 2mm × 2mm DFN Package

APPLICATIONS

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

■

LED Fixed Signage

■

Trafﬁc Signs

■

Neon Sign Replacement

TYPICAL APPLICATION

Buck Mode Driver for Ten White LEDs

Conversion Efﬁciency

100

1μF

50mA

4Ω

48V

1μF

LED

470μH

CONTROL

CTRL

VREG

LT3590

GND

3590 TA01a

0.1μF

LED CURRENT (mA)

3590 TA01b

3590f

12 3 4 5 6 7...16

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