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LT1509技术文档下载：
LT1509 - 典型应用图例：
LT1509 - 封装图解：
LT1509 - LT1509是Power Factor and PWM Controller
LT1509是Linear公司的一款离线式控制器 / PFC产品，LT1509是Power Factor and PWM Controller，本站介绍了LT1509的封装应用图解、特点和优点、功能等，并给出了与LT1509相关的凌力尔特元器件型号供参考。
LT1509 - Power Factor and PWM Controller
LT1509 - Power Factor and PWM Controller - Linear Technology（凌力尔特）
功能描述
The LT1509 is a complete solution for universal off-line switching power supplies utilizing active power factor correction. The PFC section is identical to the LT1248 PFC controller except the EN/SYNC pin is removed because PFC and PWM are synchronized internally. The current mode PWM section (the LT1508 is the volt-age-mode counterpart) contains all the primary side functions to convert the PFC preregulated high voltage output to an isolated low voltage output. The PWM duty cycle is internally limited to 47% (maximum 50%) to prevent transformer saturation. PWM soft start begins when PFC output reaches the preset voltage. In the event of brief line loss,the PWM will be shut off when the PFC output voltage drops below 73% of the preset value.特点
应用
以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
| 器件型号 | 封装 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) |
|---|---|---|---|---|
| LT1509CN | N-20 | C | $5.25 | $3.95 |
| LT1509CN#PBF | N-20 | C | $5.25 | $3.95 |
| LT1509CSW | SW-20 | C | $5.25 | $3.95 |
| LT1509CSW#PBF | SW-20 | C | $5.25 | $3.95 |
| LT1509CSW#TR | SW-20 | C | $4.05 | |
| LT1509CSW#TRPBF | SW-20 | C | $4.05 | |
| LT1509IN | N-20 | I | $5.85 | $4.35 |
| LT1509IN#PBF | N-20 | I | $5.85 | $4.35 |
| LT1509ISW | SW-20 | I | $5.85 | $4.35 |
| LT1509ISW#PBF | SW-20 | I | $5.85 | $4.35 |
| LT1509ISW#TR | SW-20 | I | $4.45 | |
| LT1509ISW#TRPBF | SW-20 | I | $4.45 |
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