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| 型号： | LT3799IMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER TRIAC DIM 16-MSOP |
| 产品培训模块： | LT3799 Offline Isolated Flyback LED Controller |
| 标准包装： | 37 |
| 拓扑： | 交直流离线开关，反激式，PFC |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 通用 |
| 频率： | 25kHz ~ 300kHz |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TFSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 16-MSOP，裸露焊盘 |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
| 配用： | 732-2898-ND - IND TOROID LT3799 NCL30000 750UH |
LT3799
Offline Isolated Flyback
LED Controller with Active PFC
Isolated PFC LED Driver with Minimum Number of
TRIAC Dimmable
V IN and V OUT Limited Only by External Components
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
Offline 4W to 100W+ LED Applications
High DC V IN LED Applications
FEATURES
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External Components
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APPLICATIONS
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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
TRIAC Dimmable 20W LED Driver
DESCRIPTION
The LT ? 3799 is an isolated flyback controller with power
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 typically achieves power factors
of 0.97. The FAULT pin provides notification of open and
short LED conditions.
The LT3799 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.
LED Current vs Input Voltage
1.20
90V
TO 150V
AC
0.1μF
0.22μF
200
499k
499k
100k
100k
20
4.7pF
10μF
2k
4:1:1
1.15
1.10
1.05
1.00
V IN
DCM
100k
1A
0.95
6.34k
V IN_SENSE
LT3799
FB
4.99k
560μF
×2
0.90
0.85
100k
32.4k
40.2k
V REF
CTRL3
CTRL2
GATE
SENSE
20
20W
LED
POWER
0.80
90
100
110
120 130
V IN (V AC )
140
150
3799 TA01b
100k
NTC
16.2k
CTRL1
INTV CC
GND
4.7μF
0.05
2.2nF
FAULT
FAULT CT COMP +
COMP –
3799 TA01a
0.1μF
0.1μF
3799fa
1
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相关代理商/技术参数 |
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| LT38 | 制造商:Thomas & Betts 功能描述:3/8 BLACK STRAIGHT LIQUIDTIGHT FTG |
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| LT3800EFE#PBF | 功能描述:IC REG CTRLR INV PWM CM 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
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