Re: Mosfet driver inverting/non-inverting questions.

On Dec 4, 4:31 am, (Rubicon) wrote:
Hello,

I have am a little confused here about the inverting and non-inverting

mosfet drivers TC4429 and TC4420.

*********************************
From the Microchip data***:
The TC4429 is an inverting driver (pin-compatible
with the TC429), while the TC4420 is a non-inverting driver.
*********************************

Yet when I look at the functional block diagram of both types the
inverting 4429 has an inverter followed by another inverter so then it
must be a non-inverting driver and as the non-inverting 4420 has only
the latter inverter it must be an inverting driver. Is this correct or
am I reading it completely wrong?

www.ortodoxism.ro/datasheets/microchip/21419b.pdf

In addition if using a Microchip PIC to PWM a TC4429 (actually?)
inverting driver (the only mosfet driver I can find locally) that
contols a N-channel mosfet that controls a motor wouldn't you need to
reverse the PWM values and to keep the I/O pin high when not wanting
the motor on?

Any help appreciated.

Regards,

Andrew.

If I understand this correctly and the way I see the diagram, it is
correct. Did you take into account the final FET stage shifting the
signal 180 degrees from the input. As for putting another N Channel,
is it possible to use an inverter on the input of the TC4429 achieving
the same final result?
Let me know if I am understanding this right!
Poogie
.

Quantcast