收藏本站

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
n
External Components
n
n
n
n
n
n
n
n
APPLICATIONS
n
n
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
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
LT3956EUHE#PBF IC LED DVR BUCK BOOST 36-VQFN
LTC3201EMS#TRPBF IC LED DRVR WHITE BCKLGT 10-MSOP
LTC3202EDD#PBF IC LED DRIVR WHITE BCKLGT 10-DFN
LTC3205EUF#TRPBF IC LED DRVR WT/RGB BCKLGT 24-QFN
LTC3206EUF#TRPBF IC LED DRVR WT/RGB BCKLGT 24-QFN
LTC3207EUF-1#TRPBF IC LED DRIVR QVGA DISPLAY 24-QFN
LTC3208EUH#TRPBF IC LED DRIVR QVGA DISPLAY 32-QFN
LTC3209EUF-2#TRPBF IC LED DRIVR QVGA DISPLAY 20-QFN
相关代理商/技术参数
LT3799IMSE#PBF 制造商:Linear Technology 功能描述:IC LED DRVR MSOP-16 制造商:Linear Technology 功能描述:IC, LED DRVR, MSOP-16
LT3799IMSE#TRPBF 功能描述:IC LED DRIVER TRIAC DIM 16-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
LT3799IMSE-1#PBF 功能描述:IC LED CTLR ISO ACT PFC 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
LT3799IMSE-1#TRPBF 功能描述:IC LED CTLR ISO ACT PFC 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
LT3799IMSEPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:Offline Isolated Flyback LED Controller with Active PFC
LT38 制造商:Thomas & Betts 功能描述:3/8 BLACK STRAIGHT LIQUIDTIGHT FTG
LT-380 制造商:Citizen Systems America Corporation 功能描述:Thermal mech/80mm/24Volts/8dots,mm/2.5in.sec
LT3800 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage, Current Mode Switching Regulator Controller