Guest
Hello,
I have am a little confused here about the inverting and non-inverting
mosfet drivers TC4429 and TC4420.
*********************************
From the Microchip datasheet:
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.
I have am a little confused here about the inverting and non-inverting
mosfet drivers TC4429 and TC4420.
*********************************
From the Microchip datasheet:
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.