LT1246/LT1247 1MHz Off-Line Current Mode PWM and DC/DC Converter DESCRIPTIO 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 operati...

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