LT LT1242CS8#TRPBF

隔离10V ~ 25V

Overview

The LT1241 series devices are 8-pin, fixed frequency, current mode, pulse width modulators. They are improved plug compatible versions of the industry standard UC1842 series. These devices have both improved speed and lower quiescent current. The LT1241 series is optimized for off-line and DC/DC converter applications. They contain a temperature-compensated reference, high gain error amplifier, current sensing comparator and a high current totem pole output stage ideally suited to driving power MOSFETs. Start-up current has been reduced to less than 250µA. Cross-conduction current spikes in the output stage have been eliminated, making 500kHz operation practical. Several new features have been incorporated. Leading edge blanking has been added to the current sense comparator. Trims have been added to the oscillator circuit for both frequency and sink current, and both of these parameters are tightly specified. The output stage is clamped to a maximum VOUT of 18V in the on state. The output and the reference output are actively pulled low during undervoltage lockout.

Features

Isolated Output Isolation
Packaged with 8-SOIC (0.154, 3.90mm Width)
Switching Frequency at Up to 500kHz

Surface Mount Mounting Type

Applications

There are a lot of Linear Technology/Analog Devices
LT1242CS8#TRPBF AC DC Converters applications.

• Set-top boxes
• DVD players
• Records
• Linear Adapter Replacements
• Chargers for cell/cordless phones
• PDAs
• MP3
• Portable audio
• Adapters
• Networking