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Groups > comp.arch.embedded > #28991
| Subject | Re: high voltage charge pump |
|---|---|
| Newsgroups | comp.arch.embedded |
| References | <qucvgb$ipu$2@reader2.panix.com> <SKoOF.39953$ES2.27602@fx20.iad> <quftdd$c0r$3@reader2.panix.com> |
| From | Richard Damon <Richard@Damon-Family.org> |
| Message-ID | <ZQLOF.60318$lT2.9300@fx28.iad> (permalink) |
| Organization | Forte - www.forteinc.com |
| Date | 2019-12-31 12:47 -0500 |
On 12/31/19 11:35 AM, Hul Tytus wrote: > Richard - what I'm looking for is an ic similar in results to Microchips > tc7662 with an input voltage limit above 200 volts. The output current > needed is only 60 ma. which is in the range of charge pump ic that I've > seen so far. > > Hul Yes, a doubler configuration can be reversed to become a halfer, if that is the voltage you need. 60 mA is also on the high range of what these supplies are considered good for, due to the somewhat high output impedance of a charge pump. I am not familiar with devices in that range, so can't suggest what might work up there. One issue that you may run into is that a lot of things likely need to scale in the wrong directions. Higher voltages means more charge transferred for equivalent percentage ripple, which up the energy involved, so you may need to reduce the capacitance, or the switching frequency which drops the current capacity of the system.
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high voltage charge pump Hul Tytus <ht@panix.com> - 2019-12-30 13:53 +0000
Re: high voltage charge pump Richard Damon <Richard@Damon-Family.org> - 2019-12-30 10:30 -0500
Re: high voltage charge pump Hul Tytus <ht@panix.com> - 2019-12-31 16:35 +0000
Re: high voltage charge pump Richard Damon <Richard@Damon-Family.org> - 2019-12-31 12:47 -0500
Re: high voltage charge pump Rick C <gnuarm.deletethisbit@gmail.com> - 2019-12-31 16:30 -0800
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