The current draw from a device I am using increases over time. So at time=zero I expect the output to be DC (or close to it) and over time the pulse width to narrow to maintain a similar RMS current. I am thinking of using something like a LM2524 driving a power FET. I have some questions:
1.From the data sheet I noticed a duty cycle of approx 0-50% - on startup I would require about 100% - presumably I would have to invert the output ? any suggestions?
2.The current sense appears to be about 200mv and they state the duty cycle drops to about 25% - so at what sense voltage would it start to reduce the current i.e. what is the range between no limiting to maximum.
3.If I take the approach of inverting the output to give me close to DC at time zero - then that will mess up any current limiting because the duty cycle of the device would be close to zero ?
Any advice would be appreciated - even the suggestion of a more suitable component.
1.From the data sheet I noticed a duty cycle of approx 0-50% - on startup I would require about 100% - presumably I would have to invert the output ? any suggestions?
2.The current sense appears to be about 200mv and they state the duty cycle drops to about 25% - so at what sense voltage would it start to reduce the current i.e. what is the range between no limiting to maximum.
3.If I take the approach of inverting the output to give me close to DC at time zero - then that will mess up any current limiting because the duty cycle of the device would be close to zero ?
Any advice would be appreciated - even the suggestion of a more suitable component.