Linear Technology LT1681
The LT1681’s operating frequency is programmable and can be synchronized up to 350kHz. 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.| Part No. | LT1681 |
|---|---|
| Datasheet | LT1681 Download |
| Manufacturer |  Linear Technology |
| Description | Dual Transistor Synchronous Forward Controller |
| Buy | Stock & Price |
FEATURES
s High Voltage: Operation Up to 72V s Synchronizable Operating Frequency and Output Switch Phase for Multiple Controller Systems s Fixed Frequency Operation to 350kHz s Adaptive and Adjustable Blanking s Synchronous Rectifier Driver s Local 1% Voltage Reference s Undervoltage Lockout Protection with Hysteresis s Input Overvoltage Protection s Programmable Start Inhibit s Transformer Primary Saturation Protection s Optocoupler Feedback Support s Soft-Start Control U APPLICATIO S s Isolated Telecommunication Systems s Personal Computers and Peripherals s Lead Acid Battery Backup Systems s Automotive and Heavy Equipment DESCRIPTIO The LT®1681 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. Switch phase is also controlled during synchronized operation to accommodate multiple converter systems.
