[moved] Dedicated 4 channel PWM IC

[mabauti]

Hi everyone:

Recomend me a dedicated 4 channel PWM IC

 

[dick_freebird]

There are multichannel buck PWMs (some w/ integrated
power switches) from LT/ADI and TI/National. But I am
not going to recommend a particular one since you say
not one thing about attributes beyond "4", and I have no
direct experience with any of them anyhow. Seems to me
that you would be best served by a distributor's component
selection utilities, on their web sites (what you can get,
trumps what you might like).

 

[mabauti]

sorry dick_freebird.

I want to use it for controlling 4 dc motors 6V @ 1A

 

[KlausST]

Hi,

You should give specifications.
* pwm frequency (range)
* duty cycle range
* duty cycle resolution

Klaus

 

[mabauti]

Hi Klauss, may be someone know about this

pwm frequency (range) : 200Hz to 2khz
duty cycle range : 5% to 95%
duty cycle resolution 8bits to 12bits

 

[KlausST]

Hi,

I don´t know any ready to buy IC.

A PLD could do this.
let´s say 10 bit resolution.
* 10 bit counter
* 4 registers with 10 bits each

This are at least 54 MCs.
Now it depends wht interface you have.

A 8 bit or 10 bit parallel interface may fit into a 72 MC device.
With I2C or SPI you need a larger one.

Klaus