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JA4429

更新时间： 2024-02-15 08:50:06
品牌 Logo 应用领域
凌特 - Linear 功率因数校正控制器
页数 文件大小 规格书
20页 1607K
描述
Offline Isolated Flyback LED Controller with Active PFC

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中文翻译

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JA4429 技术参数

是否Rohs认证：符合生命周期：Active
包装说明：ROHS COMPLIANTReach Compliance Code：compliant
ECCN代码：EAR99风险等级：2.21
Samacsys Confidence：4Samacsys Status：Released
Samacsys PartID：281331Samacsys Pin Count：8
Samacsys Part Category：Transistor BJT NPNSamacsys Package Category：Other
Samacsys Footprint Name：JA4429-AL-2Samacsys Released Date：2020-02-19 16:54:21
Is Samacsys：N其他特性：TURNS RATIO: 1: 0.24
高度：17.3 mm长度：21.1 mm
安装特点：SURFACE MOUNT初级绕组数量：2
次级绕组数量：1输出电压 1：24 V
输出电压2：24 V包装方法：TRAY
物理尺寸：L21.1XB21.1XH17.3 (mm)初级电感：400 µH
表面贴装：YES变压器类型：SMPS TRANSFORMER
宽度：21.1 mmBase Number Matches：1

JA4429 数据手册

 浏览型号JA4429的Datasheet PDF文件第2页浏览型号JA4429的Datasheet PDF文件第3页浏览型号JA4429的Datasheet PDF文件第4页浏览型号JA4429的Datasheet PDF文件第5页浏览型号JA4429的Datasheet PDF文件第6页浏览型号JA4429的Datasheet PDF文件第7页 
Electrical Specifications Subject to Change  
LT3799  
Offline Isolated Flyback  
LED Controller with Active PFC  
FEATURES  
DESCRIPTION  
ꢀhe Lꢀ®3799 is an isolated flyback controller with power  
factor correction specifically designed for driving LEDs.  
ꢀhe 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 MOSFEꢀ. Utilizing an onboard  
multiplier, the Lꢀ3799 typically achieves power factors  
of 0.97. ꢀhe FAULT pin provides notification of open and  
short LED conditions.  
n
Isolated PFC LED Driver with Minimum Number of  
External Components  
n
TRIAC Dimmable  
n
V and V  
Limited Only by External Components  
IN  
OUT  
n
n
n
n
n
n
Active Power Factor Correction (Typical PFC > 0.97)  
Low Harmonic Content  
No Opto-Coupler Required  
Accurate Regulated LED Current (±±5 ꢀypical)  
Open LED and Shorted LED Protection  
ꢀhermally Enhanced 16-lead MSOP Package  
APPLICATIONS  
ꢀhe Lꢀ3799 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.  
n
Offline 4W to 100W+ LED Applications  
High DC V LED Applications  
n
IN  
L, Lꢀ, LꢀC, LꢀM, Linear ꢀechnology and the Linear logo are registered trademarks and  
ꢀrue Color PWM is a trademark of Linear ꢀechnology Corporation. All other trademarks are the  
property of their respective owners. Patents pending.  
TYPICAL APPLICATION  
TRIAC Dimmable 20W LED Driver  
LED Current vs Input Voltage  
1.20  
1.15  
100k  
100k  
90V  
TO 150V  
AC  
20Ω  
0.22µF  
200Ω  
4:1:1  
1.10  
0.1µF  
499k  
499k  
4.7pF  
1.05  
1.00  
10µF  
2k  
DCM  
1A  
100k  
V
IN  
0.95  
V
FB  
IN_SENSE  
0.90  
4.99k  
560µF  
× 2  
LT3799  
6.34k  
40.2k  
0.85  
0.80  
V
REF  
20W  
20Ω  
90  
100  
110  
120  
(V  
130  
140  
150  
LED  
100k  
32.4k  
CTRL3  
CTRL2  
CTRL1  
GATE  
V
)
IN AC  
POWER  
3799 TA01b  
SENSE  
V
INTVCC  
0.05Ω  
100k  
NTC  
4.7µF  
16.2k  
2.2nF  
GND  
–
+
FAULT  
FAULT CT COMP COMP  
3799 TA01a  
0.1µF  
0.1µF  
3799p  
1
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中文翻译

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