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From: email@example.com (Bob Wilson)
Subject: Re: SMPS Topology Question
Date: Fri, 15 Nov 2002 07:00:44 -0000
Organization: Your Organization
X-Newsreader: WinVN 0.99.9 (Released Version) (x86 32bit)
References: <firstname.lastname@example.org> <email@example.com>
In article <firstname.lastname@example.org>,
>email@example.com (james) wrote:
>>I am in the UK, so 230V. I will have a look at double ended forward
>>converters as you suggest. Any recommendations on control IC's or app
>>firstname.lastname@example.org (Gibbo) wrote in message
>>> email@example.com (james) wrote:
>>> >I'm thinking about designing an offline SMPS to supply a voltage of
>>> >400V at a peak current of 1A. This is for charging a large, high
>>> >voltage capacitor bank for use with linear magnetic accelerators
>>> >My question is: what topology to use?
>>> >Since we are talking a peak power of 400W, should i be thinking of a
>>> >forward converter or even half bridge or push pull?
>>> >Anyone have any views on this or know of any resoureces that may help
>>> >in this decision.
>>> >thanks in advance
>>> What's your supply voltage ?
>>> 120 or 230 ?
>>> If 120 I'd go for a forward converter. If 230 I'd go for a double ended
>>> Of course other opinions will differ.
>There are literally dozens to choose from. Go for a current mode, something
>like the UC3844 from unitrode (also clone manufactured). I only name that
>because it's been a long time friend of mine. Cheap and easy to design
>Unitrode's website will have design notes on it (and it's many brothers and
I agree. The 384x series is well proven and easily avaiable. It is basically
a current mode controller (many advantages, few disadvantages). Just be
careful that not ALL the various 384x ICs from different manufacturers
operate identically. There can be minor subtle differences between them that
can (in some instances) cause grief. Test before substituting!
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