Max1044

Thread Starter

mkbutan

Joined Sep 30, 2008
299
hi
every one
I came to know one IC "MAX1044" from Maxim Integrated.

I would like to know what is the use of this IC " MAX1044/ICL7660 " in Harvesting the Energy ? and how does it works (i have read the DataSheet Below)

and what is the " Switched-Capacitor Voltage Converters " means and what's the use of it. where can one use it in other Ckt's and how?

how the " Paralleling " multiple MAX1044 is used in the data sheet .
what is the use of it?

can one use " serial " multiple MAX1044 ? if yes how and what will be the use of it ?

http://datasheets.maximintegrated.com/en/ds/ICL7660-MAX1044.pdf



thanks pl. help
 

crutschow

Joined Mar 14, 2008
34,804
It performs all the functions listed in the first sentence of the data sheet. It's used to convert the voltage or polarity of a source voltage. If you have a low voltage source, you can increase its voltage for example. It's limited to small currents (10mA or less).

Paralleling them provides more output current (if you need more current the data sheet suggests using a MAX660.

If you connect them in serial you can get a higher output voltage.

All this info is in the data sheet. Please read it again.
 

Thread Starter

mkbutan

Joined Sep 30, 2008
299
_Applications_

-5V Supply from +5V Logic Supply
Personal Communications Equipment
Portable Telephones
Op-Amp Power Supplies
EIA/TIA-232E and EIA/TIA-562 Power Supplies
Data-Acquisition Systems
Hand-Held Instruments
Panel Meters


not these I mean to ask my First Question
"""I would like to know what is the use of this IC " MAX1044/ICL7660 " in Harvesting the Energy ? and how does it works (I have read the DataSheet but not mentioned in it)"""


thanks
 

Audioguru

Joined Dec 20, 2007
11,248
If you want to harvest energy then you should use an IC that is designed to harvest energy.

But the MAX1044 can operate using the very low current and fairly low voltage from a vibrating piezo transducer. Then it can double the voltage and slowly charge a capacitor. The charge in the capacitor is harvested energy.

Somebody used an energy harvesting IC to charge the battery in his cell phone. The IC was fed from a piezo transducer in his shoe. The phone charged in about one week when he walked around all the time.
 

Thread Starter

mkbutan

Joined Sep 30, 2008
299
If you want to harvest energy then you should use an IC that is designed to harvest energy.

But the MAX1044 can operate using the very low current and fairly low voltage from a vibrating piezo transducer. Then it can double the voltage and slowly charge a capacitor. The charge in the capacitor is harvested energy.

Somebody used an energy harvesting IC to charge the battery in his cell phone. The IC was fed from a piezo transducer in his shoe. The phone charged in about one week when he walked around all the time.



thanks i like it
 

Thread Starter

mkbutan

Joined Sep 30, 2008
299
hi
this is the in the magazine in India as ELEKTOR INDIA
originally from UK (I think )
pl any one explain me
1.How the MAX1044/MAX1055/MAX931 help to harvesting energy and how?
2.What is the function of Cn/Dn/Cp in Fig.4 pg 34 of the pdf in the attachment below

can any one exp. briefly the DICKSON CHARGE PUMP
Fig .#4/Fig.#5.


thanks
 

Attachments

t06afre

Joined May 11, 2009
5,934
Then people use the words "energy harvesting" in this forum. My first thoughts is deep scepticism. I think it would be a good idea if you told us more about your project. Is this just some castle in the sky. Or is it something that might have a change of working.
If you are able to argument that this is something worth using some time on. You will get a better audience for sure. Good questions draw good answers you know.
 

Thread Starter

mkbutan

Joined Sep 30, 2008
299
Hi
today i went to the mkt. For MAX1044
Oh my god the IC MAX1044 cost INR 650/-
is this IC so costly ???????
 

t06afre

Joined May 11, 2009
5,934
650 INR is twice as much as I have to pay to purchase 1 from my not so cheap IC vendor with all kinds tax included. So yes you are kind of being ripped off here.
 

Audioguru

Joined Dec 20, 2007
11,248
Today 650 Indian Rupees is $12.33 US dollars. Today one MAX1044 IC costs only $2.88 US dollars at Digikey but you must pay extra for shipping and taxes.
 

Audioguru

Joined Dec 20, 2007
11,248
Dear T06afre and Audioguru
is fig.#4/#5 is same to the IC MAX-1044 or its difff.ckt.
Pl. Exp.
The description of the MAX1044 charge pump in its datasheet seems to be almost the same as figure 5 in your magazine article except the MAX1044 does not use diodes to do it. Instead it does the switching with Cmos transmission gates.

The MAX1044 has only one voltage-doubling charge pump stage but figure 5 has many stages. The datasheet of the MAX1044 shows how to cascade ICs for as many stages as you need.
 

Thread Starter

mkbutan

Joined Sep 30, 2008
299
I may not buy that IC MAX 1044

but I would like to build that ckt in Fig.#4/#5
pl guide me how to make it
what is the value of C1,c2,c3.....Cn
D1,D2,D3,Dn,.......Dn+1
Cp1,Cp2,Cp3........Cs

sir I have 1n4001,4,7 few mix Diodes or which one to buy ???
and I have few ceramic 1nF Capacitors will that work???
but dont uoy find any similarity in between
" The Dickson Charged pump Ckt."
and
"The Cockcroft-Walton voltage multipliers Ckt."
which I think is not safe its Dangerous :eek:
If I am not Wrong its the same Ckt. used in to produce the IONS (negative ionizer)
sir here I found one link while surfing it may be use full !!!
Pl help to find the value of Capacitors and Diodes .
Thanks


http://www.edacafe.com/books/McGraw_Hill/Charge_Pump_Circuit_Design/45xch01.pdf
 
Last edited:

Audioguru

Joined Dec 20, 2007
11,248
The 1N400x rectifier is designed for 50Hz and 60Hz and does not work properly at the high frequency used by the MAX1044 IC.
Use 1N914 or 1N4148 high speed diodes instead.

Your 1nF capacitors can be used if the switching frequency is high and the load current is low.

The voltage multiplier circuit with the diodes and capacitors works from a fairly high input voltage.
The voltage doubler circuit with the MAX1044 works from a voltage from only 1.5V to 10V.
What will be your input voltage?
 

Thread Starter

mkbutan

Joined Sep 30, 2008
299
Thanks
on sat day i will get dz or two the diodes and the cap. you sad 1N914 and 1N4148 and 1μF
can i use (BAS16VV / BAS16VY)?

sir what is the diff. in both the ckt's. in the above link in the forum #16

thanks
 

Audioguru

Joined Dec 20, 2007
11,248
I did not say to use 1uF capacitors. The value of the capacitor depends on the switching frequency and load current.
But I don't know what your input is from and I don't know its voltage and current.
I also don't know how much output voltage and current you want.

The BAS16 is a fast tiny little surface-mount diode. It does not have wires, instead it has tiny pads. It has a fairly high forward voltage.
 
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