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- From: sergei@upenn5.hep.upenn.edu (Sergei Borodin)
- Newsgroups: sci.electronics
- Subject: Re: Wanted: Nicad Charger Plans
- Message-ID: <105995@netnews.upenn.edu>
- Date: 21 Jan 93 17:45:10 GMT
- References: <1993Jan21.084525.25298@macc.wisc.edu>
- Sender: news@netnews.upenn.edu
- Organization: University of Pennsylvania
- Lines: 36
- Nntp-Posting-Host: upenn5.hep.upenn.edu
-
- In article <1993Jan21.084525.25298@macc.wisc.edu> jvannes@vms.macc.wisc.edu writes:
- >In article <1jhvkuINNb8d@flop.ENGR.ORST.EDU>, slezal@gyro.ECE.ORST.EDU (Lee Slezak) writes...
-
- >>I am looking for some plans to build a charger for sub-C size nicad batteries.
-
- >I have a serious Ni-Cad fetish. I have them in everything I own, flashlights,
- >music equipment, etc. I have a number of simple chargers based on the LM317
-
- Maxim recently released Max712/Max713 NiCad/NiMH
- "Battery Fast-Charge Controllers". The ICs provide
- fast charge at rates from C/4 to 4C and C/16 trickle
- charge rate as well.
-
- These devices can charge 1 to 16 series cells.
- A voltage-slope detecting ADC, a timer, and a
- temerature window comparator determine charge
- completion.
-
- Nice point #1: ICs require few external components.
- Nice point #2: Available as free samples from
- Maxim (1-800-998-8800).
-
- Linear Technology also produces fast-charge controllers,
- but unlike generous Maxim, samples are not available for
- universites (I was designing a HV power supply and ran
- across one LT's PS controller, called LT for a sample
- (actually we needed a hundred of HV PSs, but still I wanted
- to test the IC before starting a production) and got
- an answer that LT's policy is not to deal with universities :(.
-
-
- So - stick with Maxim.
-
-
- S.B.
-
-