厂商：Freescale
类别：16位单片机
厂商：Murata
类别：均衡器
类别：耦合器
厂商：
类别：Video Encoder/Decoder Module
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特点Low Start-Up Current: <250μA50ns Current Sense DelayCurrent Mode Operation: To 500kHzPin Compatible with UC1842 SeriesUndervoltage Lockout with HysteresisNo Cross-Conduction CurrentTrimmed Bandgap Reference1A Totem Pole OutputTrimmed Oscillator Frequency and Sink CurrentActive Pull-Down on Reference and Output During Undervoltage LockoutHigh Level Output Clamp: 18VCurrent Sense Leading Edge Blanking典型应用描述描述 The LT?1241 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 V OUT of 18V in the on state. The output and the reference output are actively pulled low during undervoltage lockout.