厂商：Freescale
类别：16位单片机
厂商：Linear
类别：精准放大器
厂商：
类别：PhotoMOS(MOSFET输出光电耦合器)
类别：晶闸管
类别：功率放大器
类别：电压基准
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特点Current Mode Operation to 1MHz30ns Current Sense Delay<250mA Low Start-Up CurrentCurrent Sense Leading Edge BlankingPin Compatible with UC1842Undervoltage Lockout with HysteresisNo Cross-Conduction CurrentTrimmed Bandgap Reference1A Totem Pole Output典型应用描述描述 The LT?1246/LT1247 are 8-pin, fixed frequency, current mode, pulse width modulators. These devices are designed to be improved plug compatible versions of the industry standard UC1842 PWM circuit. The LT1246/ LT1247 are 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 totem pole output stage have been eliminated, making 1MHz operation practical. Several new features have been incorporated. Leading edge blanking has been added to the current sense comparator. This minimizes or eliminates the filter that is normally required. Eliminating this filter allows the current sense loop to operate with minimum delays. 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 under-voltage lockout.