Datasheet > LT3799-1

LT3799-1

更新时间： 2023-12-20 18:45:27

品牌	Logo	应用领域
亚德诺 - ADI		控制器功率因数校正
页数	文件大小	规格书
20页	836K
描述
具备有源 PFC 功能的离线隔离型反激式 LED 控制器

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LT3799-1 数据手册

LT3799-1

Offline Isolated Flyback

LED Controller with Active PFC

FeaTures

DescripTion

TheLT^®3799-1isanisolatedflybackcontrollerwithpower

factor correction specifically designed for driving LEDs.

The controller operates using critical conduction mode

allowing the use of a small transformer. Using a novel

current sensing scheme, the controller is able to deliver a

well regulated current to the secondary side without using

an opto-coupler. A strong gate driver is included to drive

an external high voltage MOSFET. Utilizing an onboard

multiplier, the LT3799-1 typically achieves power factors

of 0.97. The FAULT pin provides notification of open and

short LED conditions. The LT3799-1 offers improved line

regulation over the LT3799, but is not designed for use

with a TRIAC dimmer.

Isolated PFC LED Driver with Minimum Number of

External Components

V and V

Limited Only by External Components

OUT

Active Power Factor Correction (Typical PFC > 0.97)

Low Harmonic Content

No Opto-Coupler Required

Accurate Regulated LED Current (±±5 Typical)

Open LED and Shorted LED Protection

Thermally Enhanced 16-Lead MSOP Package

applicaTions

Ofﬂine 4W to 100W+ LED Applications

High DC V LED Applications

The LT3799-1 uses a micropower hysteretic start-up to

efficiently operate at offline input voltages, with a third

winding to provide power to the part. An internal LDO

provides a well regulated supply for the part’s internal

circuitry and gate driver.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

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

property of their respective owners. Patents pending.

Typical applicaTion

20W LED Driver

LED Current vs Input Voltage

1.20

1.15

100k

90V

TO 150V

20Ω

1.10

4:1:1

0.22µF

499k

4.7pF

1.05

1.00

10µF

DCM

100k

0.95

0.90

0.85

0.80

170V

IN_SENSE

4.99k

560µF

× 2

LT3799-1

6.34k

40.2k

REF

100

110

120

130

140

150

20W

20Ω

33V

LED

100k

IN AC

)

32.4k

CTRL3

CTRL2

CTRL1

GATE

37991 TA01b

POWER

SENSE

INTV

0.05Ω

100k

NTC

4.7µF

15.8k

2.2nF

GND

–

FAULT

FAULT CT COMP COMP

37991 TA01a

0.1µF

37991fa

For more information www.linear.com/LT3799-1

12 3 4 5 6 7...20

下载PDF

与LT3799-1相关器件

型号	品牌	描述	获取价格	数据表
LT3799EMSE#PBF	Linear	LT3799 - Offline Isolated Flyback LED Controller with Active PFC; Package: MSOP; Pins: 16;	获取价格
LT3799EMSE-1#PBF	Linear	LT3799-1 - Offline Isolated Flyback LED Controller with Active PFC; Package: MSOP; Pins: 1	获取价格
LT3799EMSE-1#TRPBF	Linear	LT3799-1 - Offline Isolated Flyback LED Controller with Active PFC; Package: MSOP; Pins: 1	获取价格
LT3799EMSEPBF	Linear	Offline Isolated Flyback LED Controller with Active PFC	获取价格
LT3799IMSE#PBF	Linear	LT3799 - Offline Isolated Flyback LED Controller with Active PFC; Package: MSOP; Pins: 16;	获取价格
LT3799IMSE#TRPBF	Linear	LT3799 - Offline Isolated Flyback LED Controller with Active PFC; Package: MSOP; Pins: 16;	获取价格