Re: 3 Phase drive

You can find ML4426 on www.fairchildsemi.com their app note #
42004 has shown the high voltage application of this IC. Have you
seen the HP's HCTL1100 ?

Babar

> Gee, I just looked at their web site, and can't find any mention of

the

> 44xx series of parts at all. I wonder if they sold this product

line to

> another company.
>
> No, the BLDC motor products for 12 V disk-drive motors are not

anything

> like the AC motor control chips. the BLDC chips generally require
> position sensors on the motor, and just drive the full DC bus to the
> motor as square waves. The ML4423 produced PWM synthesized
> sine waves and adjusted pulse width to keep the actual output value
> in servo with the synthesized signal.
>
> It looks like ML is reducing their once-broad product line to a very
> narrow one.
>
> Jon