Re: battery chargers, again

On Tue, 29 Sep 2009 21:45:57 GMT, the renowned Jan Panteltje
<pNaonStpealmtje@xxxxxxxxx> wrote:

On a sunny day (Tue, 29 Sep 2009 12:50:58 -0700) it happened Joerg
<invalid@xxxxxxxxxxxxxxx> wrote in <7if6p4F31e03vU1@xxxxxxxxxxxxxxxxxx>:

Ah, but, my PIC 16F690 has 2 *hardware* comparators,
and does current limit just fine:
http://panteltje.com/panteltje/pic/pwr_pic/


Yeah, but: Can your PIC do 500kHz, provide clean current mode control of
the inductor and blank out the first 200nsec of the MOSFET gate drive
spike at the current sense node? That's kind of the state of the art
these days :-)

OK, but can your 'state of the art' chip do:
Programmable frequency of 19.6, 39.6, 76.9, and 153 kHz AND
Drive a LCD display.
Have 4 or more 10 bit analog inputs.
Processor core inside.
FLASH memory inside.
EEPROM inside.
Reference dividers inside.
Available in DIL so humans can see it.
Directly drive a logic level MOSFET.
Internal oscillator.
Able to replace plenty of other stuff in your circuit because of programmability.
Work on 2.5 to 5 V.
Have serial communication.
Remotely adjustable current and voltage via RS232.
For the price of a PIC.
Available from every electronics shop in the universe.

Just to mention a few points.

For a few cents more you can upgrade to a pin-compatible 64MHz chip!


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@xxxxxxxxxxxx Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
.

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