LT3781是Linear公司的一款反激式、正激式和隔离式控制器产品，LT3781是?Bootstrap? Start Dual Transistor Synchronous Forward Controller，本站介绍了LT3781的封装应用图解、特点和优点、功能等，并给出了与LT3781相关的凌力尔特元器件型号供参考。
LT3781 - ?Bootstrap? Start Dual Transistor Synchronous Forward Controller
LT3781 - ?Bootstrap? Start Dual Transistor Synchronous Forward Controller - Linear Technology（凌力尔特）
The LT3781 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 LT3781 is ideal for output derived power schemes, through the use of a large undervoltage lockout hysteresis range. The part is also equipped with an 18V VCC shunt regulator, which prevents exceeding absolute maximum ratings while in trickle start applications.
The LT3781’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 LT3781 is available in a 20-lead SSOP package.
| 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) |
|---|---|---|---|---|
| LT3781EG | SSOP-20 | E | $7.14 | $4.95 |
| LT3781EG#PBF | SSOP-20 | E | $7.14 | $4.95 |
| LT3781EG#TR | SSOP-20 | E | $5.05 | |
| LT3781EG#TRPBF | SSOP-20 | E | $5.05 | |
| LT3781IG | SSOP-20 | I | $7.86 | $5.45 |
| LT3781IG#PBF | SSOP-20 | I | $7.86 | $5.45 |
| LT3781IG#TR | SSOP-20 | I | $5.55 | |
| LT3781IG#TRPBF | SSOP-20 | I | $5.55 |
