LT1681是Linear公司的一款反激式、正激式和隔离式控制器产品，LT1681是Dual Transistor Synchronous Forward Controller，本站介绍了LT1681的封装应用图解、特点和优点、功能等，并给出了与LT1681相关的凌力尔特元器件型号供参考。
LT1681 - Dual Transistor Synchronous Forward Controller
LT1681 - Dual Transistor Synchronous Forward Controller - Linear Technology（凌力尔特）
The LT1681 controller simplifies the design of high power synchronous dual transistor forward DC/DC converters. The part employs fixed frequency current mode control and supports both isolated and nonisolated topologies. The IC drives external N-channel power MOSFETs and operates with input voltages up to 72V.
The LT1681’s operating frequency is programmable and can be synchronized up to 350kHz. Switch phase is also controlled during synchronized operation to accommodate multiple converter systems. Internal logic guarantees 50%maximum duty cycle operation to prevent transformer saturation.
The LT1681 incorporates a soft-start feature that provides a controlled increase in supplied current during start-up and after an undervoltage lockout or overvoltage/overcurrent event.
The part is available in a 20-lead wide SO package to support high voltage pin-to-pin clearance.
| 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) |
|---|---|---|---|---|
| LT1681ESW | SW-20 | E | $5.92 | $5.00 |
| LT1681ESW#PBF | SW-20 | E | $5.92 | $5.00 |
| LT1681ESW#TR | SW-20 | E | $5.10 | |
| LT1681ESW#TRPBF | SW-20 | E | $5.10 | |
| LT1681ISW | SW-20 | I | $6.51 | $5.50 |
| LT1681ISW#PBF | SW-20 | I | $6.51 | $5.50 |
| LT1681ISW#TR | SW-20 | I | $5.60 | |
| LT1681ISW#TRPBF | SW-20 | I | $5.60 |
