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Questions about CCD camera design and power supply design

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questions on power supply design

How to consider the noise level issue when design CCD camera?
One requirement of the power supply for the CCD camera is voltage accuracy must be in 1% under -45C degree to + 85 C degree.
Should I use the commercial switching power supply chip or use the discrete components to build this switching power supply?

Thanks.
 

Re: Questions about CCD camera design and power supply desig

The requirements for the power supply seem quite stringent to me. Normally a regulator is rated at about 3% regulation over -40C to +85C. Add to that the drift due to the tempco of some divider resistors and you easily get to about 5% drift.

Based on this, I think you should build your P/S using a good quality, low drift reference, low tempco resistors and make it trimmable, for the initial adjustment to bring it well within the 1% range. That way it will be easier to guarantee a maximum 1% drift over temperature.
 
Re: Questions about CCD camera design and power supply desig

Thank you so much.
 

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