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Old 12-17-2016, 08:20 PM #1
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Default Boost Converter as Current Source?

I have a question about laser drivers and how one can use a boost converter to drive a laser diode. How is it possible to fix the current supplied by a boost converter? Isn't a boost converter a constant VOLTAGE supply, not a constant CURRENT supply?... Do all these boost drivers have separate circuitry like this:

to provide a constant current after the voltage is stepped up, or am I thinking about this wrong?

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Old 12-18-2016, 03:23 AM #2
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Default Re: Boost Converter as Current Source?

Quote:
Originally Posted by hlove View Post
Isn't a boost converter a constant VOLTAGE supply, not a constant CURRENT supply?
No. Most can be configured as either.

Quote:
Originally Posted by hlove View Post
Do all these boost drivers have separate circuitry like this...
No. That's a linear stage which is unnecessary.
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