Datasheet > LT3597

LT3597

更新时间： 2023-12-20 18:46:11

品牌	Logo	应用领域
亚德诺 - ADI		驱动驱动器
页数	文件大小	规格书
24页	395K
描述
60V、三通道降压型 LED 驱动器

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LT3597 数据手册

LT3597

60V Triple Step-Down

LED Driver

FeaTures

DescripTion

Three 100mA Buck Regulators, Each Drives Up to

The LT^®3597 is a 60V triple step-down LED driver capable

ofachieving 10,000:1 digitalPWM dimming at 100Hzwith

fast NPN current sources driving up to 10 LEDs in each

channel. LED dimming can also be achieved via analog

control of the CTRL1-3 pin.

10 LEDs with Fast NPN Current Sources

Fast Current Sources for <1µs Pulse Widths

(10,000:1 True Color PWM™ Dimming at 100Hz)

LEDs Disconnected in Shutdown

Adaptive V

for Increased Efﬁciency

OUT

The step-down switching frequency is programmed be-

tween200kHzand1MHz.Thefrequencyisalsosynchroniz-

able to an external clock. The LT3597 provides maximum

LED brightness while adhering to manufacturers’ speci-

ﬁcations for thermal derating. The derate temperature is

programmedbyplacinganegativetemperaturecoefﬁcient

(NTC) resistor on the master control pin.

6V to 60V Input Voltage Range

2% LED Current Matching

External Resistor Sets LED Current for Each Channel

Internal Compensation and Soft-Start

Programmable Switching Frequency (200kHz to 1MHz)

Synchronizable to External Clock

Open LED Detection and Reporting

The LT3597 adaptively controls V

in order to achieve

Shorted LED Pin Protection and Reporting

Programmable LED Thermal Derating

Programmable Temperature Protection

5mm × 8mm Thermally Enhanced QFN Package

with a 0.6mm High Voltage Pin Spacing

OUT

optimal efﬁciency. Other features include: 2% LED cur-

rent matching between channels, open LED reporting,

shorted LED protection, programmable LED current, and

programmable temperature protection.

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

PWM is a trademark of Linear Technology Corporation. All other trademarks are the property of

their respective owners.

applicaTions

LED Billboards and Signboards

Mono, Multi, Full-Color LED Displays

Large Screen Display LED Backlighting

Automotive, Industrial, and Medical Displays

Typical applicaTion

Triple Step-Down RGB Single Pixel LED Driver, 100mA Current

48V

BOOST2

270k

91k

10,000:1 PWM Dimming at 100Hz

10µF

0.1µF

10k

100µH

OUT2

EN/UVLO

BOOST1

SW1

SW2

3.3µF 97k

9.1k

DA2

100µH

3.3µF

OUT1

0.1µF

FB2

97k

PWM

2V/DIV

DA1

OUT2

LED2

BOOST3

9.1k

FB1

LT3597

100µH

OUT3

SW3

DA3

FB3

OUT1

LED

50mA/DIV

LED1

BIAS

3.3µF 97k

9.1k

10µF

100k

3597 TA01b

200ns/DIV

FAULT

PWM1-3

CTRL1-3

SYNC

OUT3

LED3

REF

82.5k

SET

33.2k

CTRLM

GND

SET1

SET2

SET3

49.9k

3597 TA01a

100k

(1MHz)

20k

3597fa

12 3 4 5 6 7...24

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与LT3597相关器件

型号	品牌	描述	获取价格	数据表
LT3597EUHG#PBF	Linear	LT3597 - 60V Triple Step-Down LED Driver; Package: QFN; Pins: 52; Temperature Range: -40&a	获取价格
LT3597EUHG#TRPBF	Linear	LT3597 - 60V Triple Step-Down LED Driver; Package: QFN; Pins: 52; Temperature Range: -40&a	获取价格
LT3597IUHG#PBF	Linear	LT3597 - 60V Triple Step-Down LED Driver; Package: QFN; Pins: 52; Temperature Range: -40&a	获取价格
LT3597IUHG#TRPBF	Linear	LT3597 - 60V Triple Step-Down LED Driver; Package: QFN; Pins: 52; Temperature Range: -40&a	获取价格
LT3598	Linear	6-String 30mA LED Driver with 1.5% Current Matching	获取价格
LT3598	ADI	具 1.5% 电流匹配准确度的 6 串 30mA LED 驱动器	获取价格

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