# From where can I buy(small amount) of MAX1771 chip locally in Australia?

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#### Pang Fu

Jan 1, 1970
0
From where can I buy(small amount) of MAX1771 chip locally in Australia?

Pang Fu

[email protected]

M

#### Mike Diack

Jan 1, 1970
0
If Farnell and RS don't have them, you're basically f#sked. Arrow are
useless as tits on a bull, and only ever quote the ex-factory MOQ.
Your options are Power technology in NZ who sometimes have split packs
of Maxim, or samples ex Maxim direct.

In my dealings I have found Arrow are not bad for the more common
Maxim chips and consistently have better pricing than Power
Technology. Kinda depends on the definition of "small amount" - if you
lie in the region >2 pcs (samples) and <1 tube (Arrow) life can get
tricky. It's always a bit of a risk designing around Maxim chippies
due to the single source, limited supplier situation (though they do
make some neato stuff).
M

M

#### Mike Harding

Jan 1, 1970
0
It's always a bit of a risk designing around Maxim chippies
due to the single source, limited supplier situation (though they do
make some neato stuff).

Agreed. I always try to avoid Maxim for volume products
after an episode a few years ago when, during development,
they said supply was no problem then a few months later
and shortly before production they quoted a lead time of
6 months. Had to redesign the circuit/PCBs and replace
their part (a DAC from memory) with a PIC and write the
software. Treat with caution.

Mike Harding

M

#### Mike Harding

Jan 1, 1970
0
Asa result, we go to PTNZ for Maxim. Sensible MOQ's on many parts,
and prepared to source from Maxim in UK or SEAsia. Arrow.au order
solely through Arrow.us who order solely from factory production.

It pisses me off when distributors insist on sticking to
factory MOQs for _everything_ even commonly used
parts. I have to wonder what is the purpose of existence
of some distributors if all they do is on-ship a box?

I understand they don't want to be stuck with lots of
half packs of obscure components but surely they
could be more flexible with items they know will sell
in due course.

Mike Harding

P

#### Pang Fu

Jan 1, 1970
0
It is sad for me to hear that appearantly it is difficult to find MAXIM
chips (or at least some of them like MAX1771 which is not on Farnell list)
locally in Australia.

Should I change my design and use something else instead of MAX1771 or can
someone out there show me an www or e-mail adr. to order MAXIM chips locally
(including New Zeland) ?

From where can I buy(small amount) of MAX1771 chip locally in Australia?

Pang Fu

[email protected]

W

#### [email protected]

Jan 1, 1970
0
Pang said:
It is sad for me to hear that appearantly it is difficult to find MAXIM
chips (or at least some of them like MAX1771 which is not on Farnell list)
locally in Australia.

Should I change my design and use something else instead of MAX1771 or can
someone out there show me an www or e-mail adr. to order MAXIM chips locally
(including New Zeland) ?

Pang Fu

[email protected]

Is your product going to be mass produced?

If not, you can obtain some free samples from their website.

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1030/ln/en

Neither Farnell or RS Components carry the chip.
Alternately, you might use the LM2577T-12 from National Semiconductor.
RS Components carry it, p/n 263-655 $16.70 ea. The device is a TO-220-5 package, has 3A output, 3.5-10V input. You can get the datasheet from http://www.national.com/pf/LM/LM2577.html You can also obtain samples and purchase the device from National. The Linear Technology's LT1086 is available from RSC as well, for$10.40 p/n 265-342
It's an adjustable switching regulator, output up to 1.5A. The datasheet can be
obtained from http://www.linear.com/prod/datasheet.html?datasheet=233
National Semiconductor also produce a (cheaper at RSC) version of this device as well.

P

#### Pang Fu

Jan 1, 1970
0
Dear David,

What I'm trying to do is a solar cell powered battery charger/regulator for
NiCd batteries. This is for a school project (ie. I'm not going to mass
produce). The solar cells that I'm using gives me 1.5 v output. I can use
only two solar cells which means I'll have 3v input to step-up
regulator/booster.

I've looked at your links but I'm afraid LM2577T-12 has min 3.5v input which
will not be suitable for solar cell powered battery charger. Do you have any
sugessition how to build such a circuit with components that available in
the market?

Cheers.

Pang Fu
[email protected]

M

#### Mike Harding

Jan 1, 1970
0
What I'm trying to do is a solar cell powered battery charger/regulator for
NiCd batteries. This is for a school project (ie. I'm not going to mass
produce). The solar cells that I'm using gives me 1.5 v output. I can use
only two solar cells which means I'll have 3v input to step-up
regulator/booster.

I've looked at your links but I'm afraid LM2577T-12 has min 3.5v input which
will not be suitable for solar cell powered battery charger. Do you have any
sugessition how to build such a circuit with components that available in
the market?

Always useful to tell us initially it's a school or uni
project otherwise we may assume you're a full
blown commercial designer.

A quick look in the Farnell catalogue shows the
following 2 devices which seem to handle low
input voltages, you'll need to look up the data
sheets to see if they are suitable.

MAX757
MAX761

Mike Harding

P

#### Pang Fu

Jan 1, 1970
0
Mike,

You are great. Thank you for the info.,

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