- 制造厂商:AD
- 产品类别:功率控制
- 技术类目:离线功率因数校正(PFC)控制器
- 功能描述:具备有源 PFC 功能的离线隔离型反激式 LED 控制器
- (AD代理渠道,提供当日发货、严格的质量标准,满足您的目标价格)
LT3799-1 是一款具有功率因数校正功能的隔离型反激式控制器,专为驱动 LED 而特别设计。该控制器采用临界导通模式运作,因而允许使用一个小的变压器。这款控制器运用一种新颖的电流检测方案,能够向副端输送经过良好调节的电流,而无需采用光耦合器。此器件内置了一个强大的栅极驱动器,用于驱动外部高电压 MOSFET。LT3799-1 采用了一个内置乘法器,通常可实现 0.97 的功率因数。FAULT 引脚负责告知开路和短路 LED 情况。LT3799-1 的电压调节性能优于 LT3799,但并非专为与 TRIAC 调光器配合使用而设计。
LT3799-1 运用微功率迟滞启动,以在采用离线输入电压时实现高效运作,并利用第三个绕组为器件供电。一个内部 LDO 负责为器件的内部电路和栅极驱动器提供经过良好调节的电源。
应用
- 离线 4W 至 100W+ LED 应用
- 高 DC VIN LED 应用
- 具最少外部组件的隔离型 PFC LED 驱动器
- VIN 和 VOUT 仅受限于外部组件
- 有源功率因数校正 (典型 PFC > 0.97)
- 低谐波成分
- 无需光耦合器
- 准确的已调 LED 电流 (典型值为 ±5%)
- 开路 LED 和短路 LED 保护
- 耐热性能增强型 16 引脚 MSOP 封装
LT3799EMSE-1#PBF,封装:16-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-40 to 125C,AD官网报价:3.11(100-499个);2.54(1000+个)
LT3799EMSE-1#TRPBF,封装:16-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:3.11(100-499个);2.54(1000+个)
LT3799IMSE-1#PBF,封装:16-Lead MSOP w/ EP,包装形式及数量:管装,37,工作温度:-40 to 125C,AD官网报价:3.58(100-499个);2.92(1000+个)
LT3799IMSE-1#TRPBF,封装:16-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:3.58(100-499个);2.92(1000+个)
DC1947A:LT3799EMSE-1 Demo Board | Offline Isolated Flyback LED Driver with PFC
DC1947A: Demo Board for the LT3799-1 Offline Isolated Flyback LED Controller with Active PFC.
DC1816B:LT3799EMSE-1 Demo Board I Offline Isolated Flyback LED Driver with PFC, 90VAC ≤ VIN ≤ 305VAC, VOUT = 36V(nom) @ 3A
Demonstration circuit 1816B is an off-line isolated flyback LED driver featuring LT3799-1. The demo board provides a single constant current output of 3A over an LED string voltage from 22V to 38V. It is optimized to operate over a wide AC input voltage range (90VAC to 305VAC, 47Hz to 63Hz). LED current typically stays within ±5% over the whole input voltage range. It provides a high power factor (>0.9) enabling a single design to be used worldwide. It is also designed to comply with the IEC 61000-3-2 Class C harmonics standard and the EN55015B conducted EMI standard.